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      "text": "∗ 国家重点研发计划项目 (Ｎｏ. ２０１７ＹＦＢ０１０２９００ꎬ ２０１６ＹＦＢ０１０１２０１)、 国家自然科学基金项目 (Ｎｏ. ２１４７６０８８ꎬ ２１７７６１０４)、 广东省科学技术厅 (Ｎｏ. ２０１５Ｂ０１０１０６０１２) 和广州市科技创新委员会 (Ｎｏ. ２０１５０４２８１６１４３７２ꎬ ２０１６ＧＪ００６) 资助",
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      "ref": "#/texts/17",
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      "label": "footnote",
      "order": 17000,
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      "layout_page_order": 18,
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      "text": "∗ ∗Ｃｏｒｒｅｓｐｏｎｄｉｎｇ ａｕｔｈｏｒ ｅ￣ｍａｉｌ: ｃｈｓｊｌｉａｏ＠ ｓｃｕｔ.ｅｄｕ.ｃｎ",
      "text_preview": "∗ ∗Ｃｏｒｒｅｓｐｏｎｄｉｎｇ ａｕｔｈｏｒ ｅ￣ｍａｉｌ: ｃｈｓｊｌｉａｏ＠ ｓｃｕｔ.ｅｄｕ.ｃｎ",
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      "inside_body_region": false,
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        "body_candidate": false,
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        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
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      "truncation_marker": ""
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      "ref": "#/texts/18",
      "page": 1,
      "label": "page_footer",
      "order": 18000,
      "source_page_order": 19,
      "layout_order": 18,
      "layout_page_order": 19,
      "bbox": [
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      "text": "ｈｔｔｐ : / / ｗｗｗ.ｐｒｏｇｃｈｅｍ.ａｃ.ｃｎ",
      "text_preview": "ｈｔｔｐ : / / ｗｗｗ.ｐｒｏｇｃｈｅｍ.ａｃ.ｃｎ",
      "word_count": 5,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
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      "parser_body_decision_reason": "docling_page_footer",
      "production_usage": "",
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      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "page_footer",
      "zone": "bottom_margin",
      "column": "right_crossing",
      "column_index": null,
      "column_count": null,
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        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
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      "background_delta": 0,
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      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.035,
        "bottom": 0.0,
        "left": 0.178,
        "right": 0.089
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      "ref": "#/texts/19",
      "page": 1,
      "label": "page_footer",
      "order": 19000,
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      "layout_page_order": 20,
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      "text": "Ｐｒｏｇｒｅｓｓ ｉｎ Ｃｈｅｍｉｓｔｒｙ ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
      "text_preview": "Ｐｒｏｇｒｅｓｓ ｉｎ Ｃｈｅｍｉｓｔｒｙ ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
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      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "docling_page_footer",
      "parser_body_decision_reason": "docling_page_footer",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "page_footer",
      "zone": "bottom_margin",
      "column": "right",
      "column_index": null,
      "column_count": null,
      "flags": {
        "docling_non_body_label": true,
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        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
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        255,
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      "background_delta": 0,
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      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.087,
        "bottom": 0.0,
        "left": 0.178,
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      "ref": "#/texts/20",
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      "order": 20000,
      "source_page_order": 1,
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      "layout_page_order": 1,
      "bbox": [
        9.94,
        30.41,
        211.83,
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      },
      "text": "鲁志远等 : 锂离子电池富锂锰基层状正极材料的稳定性",
      "text_preview": "鲁志远等 : 锂离子电池富锂锰基层状正极材料的稳定性",
      "word_count": 3,
      "cleaned_text": "鲁志远等 : 锂离子电池富锂锰基层状正极材料的稳定性",
      "cleaned_text_preview": "鲁志远等 : 锂离子电池富锂锰基层状正极材料的稳定性",
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      "body_decision_reason": "docling_page_header",
      "parser_body_decision_reason": "docling_page_header",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
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      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "page_header",
      "zone": "top_margin",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
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        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
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        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
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        "caption_continuation_used_by_asset": false
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      "background_delta": 1,
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        "left": 0.059,
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      "ref": "#/texts/21",
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      "source_page_order": 2,
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      "layout_page_order": 2,
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      "text": "综述与评论",
      "text_preview": "综述与评论",
      "word_count": 1,
      "cleaned_text": "综述与评论",
      "cleaned_text_preview": "综述与评论",
      "included_in_body": false,
      "body_decision_reason": "docling_page_header",
      "parser_body_decision_reason": "docling_page_header",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:1",
      "role_guess": "page_header",
      "zone": "top_margin",
      "column": "column_2_of_2",
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      "column_count": 2,
      "flags": {
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        "page_margin_noise": false,
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        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
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      "page_background_rgb": [
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      "background_class": "colored",
      "is_gray_background": false,
      "has_frame_evidence": true,
      "edge_dark_ratios": {
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        "left": 0.869,
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      "order": 22000,
      "source_page_order": 3,
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      "layout_page_order": 3,
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      "text": "ａｎｄ ｓｕｒｆａｃｅ ｃｏａｔｉｎｇ ｈａｓ ｂｅｅｎ ｓｕｇｇｅｓｔｅｄ ｔｏ ｉｍｐｒｏｖｅ ｔｈｅ ｓｔａｂｉｌｉｔｙ ｏｆ ｌｉｔｈｉｕｍ￣ｒｉｃｈ ｃａｔｈｏｄｅ ｍａｔｅｒｉａｌｓ ｉｎ ｔｈｅ ｌｏｎｇ ｃｙｃｌｅ ｐｒｏｃｅｓｓ ꎬ ａｎｄ ｔｈｅ ｉｎｔｒｏｄｕｃｔｉｏｎ ａｎｄ ｐｒｏｓｐｅｃｔ ｏｆ ｔｈｉｓ ｍｅｃｈａｎｉｓｍ ａｒｅ ａｌｓｏ ｇｉｖｅｎ.",
      "text_preview": "ａｎｄ ｓｕｒｆａｃｅ ｃｏａｔｉｎｇ ｈａｓ ｂｅｅｎ ｓｕｇｇｅｓｔｅｄ ｔｏ ｉｍｐｒｏｖｅ ｔｈｅ ｓｔａｂｉｌｉｔｙ ｏｆ ｌｉｔｈｉｕｍ￣ｒｉｃｈ ｃａｔｈｏｄｅ ｍａｔｅｒｉａｌｓ ｉｎ ｔｈｅ ｌｏｎｇ ｃｙｃｌｅ ｐｒｏｃｅｓｓ ꎬ ａｎｄ ｔｈｅ ｉｎｔｒｏｄｕｃｔｉｏｎ ａｎｄ ｐｒｏｓｐｅｃｔ ｏｆ ｔｈｉｓ ｍｅｃｈａｎｉｓｍ ａｒｅ ａｌｓｏ ｇｉｖｅｎ.",
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      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "empty_after_cleaning",
      "parser_body_decision_reason": "empty_after_cleaning",
      "production_usage": "",
      "visual_asset_type": "",
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      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "body_candidate_excluded",
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      "order": 23000,
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      "text": "Ｋｅｙ ｗｏｒｄｓ ｌｉｔｈｉｕｍ￣ｒｉｃｈ ｍａｎｇａｎｅｓｅ￣ｂａｓｅｄ ｌａｙｅｒｅｄ ｃａｔｈｏｄｅ ｍａｔｅｒｉａｌｓ ꎻ ｃｙｃｌｅ ｓｔａｂｉｌｉｔｙ ꎻ ｂｕｌｋ ｄｏｐｉｎｇ ꎻ ｓｕｒｆａｃｅ ｍｏｄｉｆｉｃａｔｉｏｎ",
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      "text": "Ｃｏｎｔｅｎｔｓ",
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      "bbox": [
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        245.34,
        65.4,
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      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "１ Ｉｎｔｒｏｄｕｃｔｉｏｎ",
      "text_preview": "１ Ｉｎｔｒｏｄｕｃｔｉｏｎ",
      "word_count": 2,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
        255,
        255
      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.031,
        "bottom": 0.0,
        "left": 0.0,
        "right": 0.07
      },
      "excluded_risk_level": "medium",
      "region_id": "p2:page_body:column_1_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/26",
      "page": 2,
      "label": "list_item",
      "order": 26000,
      "source_page_order": 7,
      "layout_order": 26,
      "layout_page_order": 7,
      "bbox": [
        9.65,
        261.55,
        230.59,
        45.17
      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "２ Ｓｔｒｕｃｔｕｒａｌ ｃｈａｒａｃｔｅｒｉｓｔｉｃ ａｎｄ ｅｌｅｃｔｒｏｃｈｅｍｉｃａｌ ｂｅｈａｖｉｏｒｓ ｏｆ ｌｉｔｈｉｕｍ￣ｒｉｃｈ ｍａｎｇａｎｅｓｅ￣ｂａｓｅｄ ｍａｔｅｒｉａｌｓ",
      "text_preview": "２ Ｓｔｒｕｃｔｕｒａｌ ｃｈａｒａｃｔｅｒｉｓｔｉｃ ａｎｄ ｅｌｅｃｔｒｏｃｈｅｍｉｃａｌ ｂｅｈａｖｉｏｒｓ ｏｆ ｌｉｔｈｉｕｍ￣ｒｉｃｈ ｍａｎｇａｎｅｓｅ￣ｂａｓｅｄ ｍａｔｅｒｉａｌｓ",
      "word_count": 10,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
        255,
        255
      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.033,
        "bottom": 0.0,
        "left": 0.024,
        "right": 0.119
      },
      "excluded_risk_level": "medium",
      "region_id": "p2:page_body:column_1_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/27",
      "page": 2,
      "label": "list_item",
      "order": 27000,
      "source_page_order": 8,
      "layout_order": 27,
      "layout_page_order": 8,
      "bbox": [
        9.65,
        310.16,
        230.66,
        28.97
      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "２􀆰 １ Ｌｉｔｈｉｕｍ￣ｒｉｃｈ ｍａｎｇａｎｅｓｅ￣ｂａｓｅｄ ｍａｔｅｒｉａｌｓ ａｎｄ ｉｔｓ ｓｔｒｕｃｔｕｒａｌ ｃｈａｒａｃｔｅｒｉｓｔｉｃ",
      "text_preview": "２􀆰 １ Ｌｉｔｈｉｕｍ￣ｒｉｃｈ ｍａｎｇａｎｅｓｅ￣ｂａｓｅｄ ｍａｔｅｒｉａｌｓ ａｎｄ ｉｔｓ ｓｔｒｕｃｔｕｒａｌ ｃｈａｒａｃｔｅｒｉｓｔｉｃ",
      "word_count": 9,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
        255,
        255
      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.011,
        "bottom": 0.0,
        "left": 0.022,
        "right": 0.011
      },
      "excluded_risk_level": "medium",
      "region_id": "p2:page_body:column_1_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/28",
      "page": 2,
      "label": "list_item",
      "order": 28000,
      "source_page_order": 9,
      "layout_order": 28,
      "layout_page_order": 9,
      "bbox": [
        9.65,
        342.47,
        182.56,
        12.76
      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "２􀆰 ２ Ｃｈａｒｇｅ￣ｄｉｓｃｈａｒｇｅ ｒｅａｃｔｉｏｎ ｍｅｃｈａｎｉｓｍ",
      "text_preview": "２􀆰 ２ Ｃｈａｒｇｅ￣ｄｉｓｃｈａｒｇｅ ｒｅａｃｔｉｏｎ ｍｅｃｈａｎｉｓｍ",
      "word_count": 5,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
        255,
        255
      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.038,
        "bottom": 0.0,
        "left": 0.05,
        "right": 0.075
      },
      "excluded_risk_level": "medium",
      "region_id": "p2:page_body:column_1_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/29",
      "page": 2,
      "label": "list_item",
      "order": 29000,
      "source_page_order": 10,
      "layout_order": 29,
      "layout_page_order": 10,
      "bbox": [
        9.65,
        358.68,
        201.78,
        12.76
      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "２􀆰 ３ Ｓｔｒｕｃｔｕｒａｌ ｅｖｏｌｕｔｉｏｎ ａｎｄ ｄｅｃａｙ ｍｅｃｈａｎｉｓｍ",
      "text_preview": "２􀆰 ３ Ｓｔｒｕｃｔｕｒａｌ ｅｖｏｌｕｔｉｏｎ ａｎｄ ｄｅｃａｙ ｍｅｃｈａｎｉｓｍ",
      "word_count": 7,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
        255,
        255
      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.031,
        "bottom": 0.0,
        "left": 0.053,
        "right": 0.079
      },
      "excluded_risk_level": "medium",
      "region_id": "p2:page_body:column_1_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/30",
      "page": 2,
      "label": "list_item",
      "order": 30000,
      "source_page_order": 11,
      "layout_order": 30,
      "layout_page_order": 11,
      "bbox": [
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        374.88,
        230.77,
        28.97
      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "３ Ｂｕｌｋ ｄｏｐｉｎｇ ｉｍｐｒｏｖｅｓ ｔｈｅ ｃｙｃｌｅ ｓｔａｂｉｌｉｔｙ ｏｆ ｌｉｔｈ￣ ｉｕｍ￣ｒｉｃｈ ｍａｎｇａｎｅｓｅ￣ｂａｓｅｄ ｍａｔｅｒｉａｌｓ",
      "text_preview": "３ Ｂｕｌｋ ｄｏｐｉｎｇ ｉｍｐｒｏｖｅｓ ｔｈｅ ｃｙｃｌｅ ｓｔａｂｉｌｉｔｙ ｏｆ ｌｉｔｈ￣ ｉｕｍ￣ｒｉｃｈ ｍａｎｇａｎｅｓｅ￣ｂａｓｅｄ ｍａｔｅｒｉａｌｓ",
      "word_count": 12,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
        255,
        255
      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.017,
        "bottom": 0.0,
        "left": 0.0,
        "right": 0.0
      },
      "excluded_risk_level": "high",
      "region_id": "p2:page_body:column_1_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/31",
      "page": 2,
      "label": "list_item",
      "order": 31000,
      "source_page_order": 12,
      "layout_order": 31,
      "layout_page_order": 12,
      "bbox": [
        9.65,
        407.29,
        83.64,
        12.76
      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "３􀆰 １ Ｌｉ ｓｉｔｅ ｄｏｐｉｎｇ",
      "text_preview": "３􀆰 １ Ｌｉ ｓｉｔｅ ｄｏｐｉｎｇ",
      "word_count": 5,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
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        255
      ],
      "page_background_rgb": [
        255,
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        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.045,
        "bottom": 0.0,
        "left": 0.035,
        "right": 0.132
      },
      "excluded_risk_level": "medium",
      "region_id": "p2:page_body:column_1_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/32",
      "page": 2,
      "label": "list_item",
      "order": 32000,
      "source_page_order": 13,
      "layout_order": 32,
      "layout_page_order": 13,
      "bbox": [
        9.65,
        423.5,
        88.78,
        12.76
      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "３􀆰 ２ ＴＭ ｓｉｔｅ ｄｏｐｉｎｇ",
      "text_preview": "３􀆰 ２ ＴＭ ｓｉｔｅ ｄｏｐｉｎｇ",
      "word_count": 5,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
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        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
        255,
        255
      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.074,
        "bottom": 0.0,
        "left": 0.035,
        "right": 0.114
      },
      "excluded_risk_level": "medium",
      "region_id": "p2:page_body:column_1_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/33",
      "page": 2,
      "label": "list_item",
      "order": 33000,
      "source_page_order": 14,
      "layout_order": 33,
      "layout_page_order": 14,
      "bbox": [
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        12.76
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      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "３􀆰 ３ Ｏ ｓｉｔｅ ｄｏｐｉｎｇ",
      "text_preview": "３􀆰 ３ Ｏ ｓｉｔｅ ｄｏｐｉｎｇ",
      "word_count": 5,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": true,
      "body_region_id": "p2:body_region:0",
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
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      "text": "正极材料是锂离子电池最为关键的材料之一 ꎬ 对于电池能量密度 、 功率密度 、 耐久性和成本的高低 起着决定性的作用 [１] ꎮ 传统的正极材料难以满足 目前快速发展的纯电动汽车 (ＥＶｓ) 或者混合动力汽 车 (ＨＥＶｓ/ ＰＨＥＶｓ) 对动力电池高续航性能的需求 ꎬ 以及不断出现的新型消费电子产品对于高容量 、 长 寿命电池的要求 [２~５] ꎬ 因此探索和研究新型的高比 能 、 高循环稳定性 、 低成本的正极材料具有十分重要 的现实意义 ꎮ",
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      "text": "工作电压的正极材料 ꎮ 此后 ꎬ 美国 Ａｒｇｏｎｎｅ 实验室 在这些研究基础上继续开拓创新 ꎬ 首次合成了 ｘ Ｌｉ ２ ＭｎＯ３􀅰 (１－ ｘ )Ｌｉ[Ｎｉ １/ ３ Ｃｏ １/ ３ Ｍｎ１/３ ]Ｏ２ 富锂锰基正 极材料 ꎬ 研究表明该材料在充电电压高于 ４􀆰 ５ Ｖ 时 ꎬ 其首圈放电比容量高达 ２５０ ｍＡｈ􀅰ｇ －１ ꎬ 至此这种高 比能的锂离子电池正极材料被认为是一种极具商业 化前景的材料而受到广泛关注和研究 [２０~２５] ꎮ",
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      "text": "关于富锂锰基材料的结构 ꎬ 依据制备条件的不 同 ꎬ 结构常常也不同 ꎬ 但是大多数情况下制得的材料 都具有层状结构 ꎮ 富锂锰基正极材料包含 Ｌｉ ２ＭｎＯ３ 和 ＬｉＴＭＯ２ 两种组分 ꎬ 这两者有着相似的结构特征 : 都具有 α￣ＮａＦｅＯ２ 的层状结构 ꎬ 并且所有八面体位 点都被氧占据 ꎬ 具备相同氧密堆积结构 - - -六方密 堆积方式 ꎮ 其中 ＬｉＴＭＯ２ 属于典型的六方层状结 构 ꎬ 归属于 Ｒ￣ ３ ｍ 空间群 ꎬ 晶体学模型如图 １(ａ)ꎬ 它 由过渡金属层 (ＴＭ)￣ 氧原子层 (Ｏ)￣ 锂层 (Ｌｉ) 重复 堆积组成 ꎻＬｉ ２ＭｎＯ３ 的晶体学模型如图 １(ｂ) 所示 ꎬ 由锂 / 锰层 (Ｌｉ/ Ｍｎ)￣ 氧原子层 (Ｏ)￣ 锂层 (Ｌｉ) 交替排 布而成 ꎬ 锂层中的锂原子占据岩盐结构的 ３ａ 位 ꎬ 锰 ￣ 锂层中包含 １/ ３ 的锂原子和 ２/ ３ 锰原子 ꎬ 占据岩盐 结构的 ３ｂ 位形成 ＬｉＭｎ ２ ꎬ 由于 Ｌｉ ＋ 与 Ｍｎ ４＋ 有不同的 离子半径 ꎬ 其在层间形成 ＬｉＭｎ ６ 超晶格结构 ꎬ 该结构 可反映在 ＸＲＤ 图谱中 ２０ ~ ２５° 较弱的衍射峰上 ꎬ 同 时 Ｌｉ ２ＭｎＯ３ 材料的点群对称性降低 ꎬ 由 Ｒ￣ ３ ｍ 转变 为 Ｃ ２ /ｍ 单斜晶系 ꎮ",
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      "text": "由于富锂锰基正极材料中 Ｌｉ ２ＭｎＯ３ 在 (００１) 晶 面与 ＬｉＴＭＯ２ 的 (００３) 晶面位置刚好重合 ꎬ 两者的晶 面间距接近 ４􀆰 ７ Å [３２] ꎬ 两种结构在原子级别可能形 成固溶体 ꎬ 因此 ꎬ 一些研究者认为富锂锰基材料是 Ｌｉ ２ＭｎＯ３ 和 ＬｉＴＭＯ２ 形成一种的假性 ' 固溶体 'ꎬ 即 纳米级混合物 ꎬ 如 :Ｔｈａｃｋｅｒａｙ 等 [３３~３５] 认为该材料是 由 ＬｉＴＭＯ２(ＴＭ＝ＮｉꎬＣＯꎬＭｎ 等 ) 和 Ｌｉ ２ＭｎＯ３ 在纳米 尺度上共生而形成的纳米复合体 ꎬ 两组分的不同比 例会对两个微区的无序度和尺寸造成影响 ꎬ 通式以 ｘ Ｌｉ ２ ＭｎＯ３􀅰 (１－ ｘ )ＬｉＭＯ２(０ < ｘ < １ꎬＭ ＝ ＭｎꎬＮｉꎬＣｏ) 表示 ꎮ 另外一种观点则认为该材料为均相固溶体 ꎬ 而不是由 Ｃ ２ /ｍ 相及 Ｒ￣ ３ ｍ 相组成的纳米复合体 ( 图 １(ｃ) 所示 )ꎬ 如 :Ｌｕ 等 [３６~３８] 认为富锂锰基正极 材料是由于过渡金属层中锂离子和过渡金属离子氧 化态不同而形成单相固溶体 ꎬ 以 Ｌｉ １＋ ｘ Ｎｉ ａ Ｃｏ ｂ Ｍｎ ｃ Ｏ２ ( ｘ ＋ ａ ＋ ｂ ＋ ｃ ＝１) 表示 ꎬ 其结构参数随着元素组成线性 变化 ꎮ 重要的是 :Ｊａｒｖｉｓ 等 [３０] 和 Ｇｅｎｅｖｏｉｓ 等 [３９] 利用",
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      "text": "衍射扫描透射电镜 (Ｄ￣ＳＴＥＭ) 和高角环形暗场像扫 描透射电子显微镜 (ＨＡＡＤＦ￣ＳＴＥＭ) 观测该材料在 原子水平上的结构 ꎬ 如图 １(ｄ)Ｌｉ[Ｌｉ ０􀆰 ２ Ｎｉ ０􀆰 ２ Ｍｎ０􀆰６ ]Ｏ２ 的 ＳＴＥＭ 所示 ꎬ 证明了该材料为单一相的 Ｃ ２ /ｍ 固 溶体 ꎬ 而非两相复合体 ꎮ 因此 ꎬ 单相固溶体的表述可 能更能够反映材料的结构特征 ꎮ",
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      "text": "２􀆰 ２ 富锂锰基层状正极材料的充放电反应",
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      "text": "由于富锂锰基层状正极材料独特的晶体结构 ꎬ 导致了其在首圈充电过程中有着不同于传统锂离子 脱嵌材料的电化学行为 ꎬ 现在已有大量的研究表明 富锂锰基正极材料超高的放电容量来源于材料中 Ｌｉ ２ＭｎＯ３ 配体的激活 [４０ꎬ ４１] ꎮ 通常认为富锂锰基层 状正极材料活化过程的充电机理以 ４􀆰 ４５ Ｖ 为界可 分为两个阶段 ꎬ 其化学表达式如下 [４２~４４] :",
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      "text": "结合图 ２ 的首圈充电曲线和前两次循环的容 量 ￣ 电压微分曲线 ꎬ 我们可以更直观地理解这种独特 的电化学行为 ꎮ 从图 ２(ａ) 中的首圈充电曲线容易 看出 ꎬ 第一阶段出现在充电电压低于 ４􀆰 ４５ Ｖ 处 ꎬ 该 段可用传统的锂离子插层材料的脱嵌机制来解释 ꎬ 锂离子的脱出由 ＬｉＴＭＯ２ 相中的过渡金属离子氧化",
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      "text": "实现电荷补偿 ꎬ 具体为 Ｃｏ ３＋ 和 Ｎｉ ２＋ 氧化为 Ｃｏ ４＋ 和 Ｎｉ ４＋ ꎬＬｉ ２ＭｎＯ３ 相不参与反应 ꎬ 只起到稳定材料结构 的作用 ꎻ 当电压高于 ４􀆰 ４５ Ｖ 时 ꎬ 会出现一个较长的 充电平台 ꎬ 对应着锂离子从 Ｌｉ ２ＭｎＯ３ 相脱出 ꎬ 从图 ２ (ｂ) 我们可以看出该过程主要由氧负离子提供氧化 补偿 ꎬ 并伴随着部分晶格氧的析出 ꎬ 具体脱出形式为 Ｌｉ ２Ｏꎬ 与此同时 Ｌｉ ２ＭｎＯ３ 经过结构重排变成 ＭｎＯ２ 活性组分 [４５~４７] ꎬ 之后材料表面的过渡金属离子扩散 到材料的主体中 ꎬ 部分占据 Ｌｉ ＋ 和 Ｏ ２－ 脱出而留下的 空位 ꎬ 导致 Ｌｉ ＋ 的不可逆脱嵌 ꎬ 这就是所谓的 ' 氧流 失 ' 机制 ꎮ",
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      "text": "理解晶格氧在富锂锰基正极材料中扮演的角 色 ꎬ 有助于我们理解该材料高能量密度的来源 [４９] ꎮ 图 ３(ａ) 展示了晶格氧在不同层状氧化物中的电化 学反应参与程度 [４０] ꎬ 像在 ＬｉＣｏＯ ２ 这样的经典层状 氧化物中 ꎬ 晶格氧主要起着支柱 ( 宿主 ) 作用 ꎬ 以稳 定材料结构 ꎬ 而不会产生过多的额外容量 ꎮ 当在过 渡金属层中加入额外的锂时 ꎬ 即为富锂状态时 ꎬ 阳离 子和阴离子氧化还原均参与到电化学反应中 ꎬ 显著 提高了材料的整体能量密度 ꎮ Ｓｅｏ 等 [５０] 通过使用密 度泛函理论 (ＤＦＴ) 计算 ꎬ 发现 Ｌｉ-Ｏ-Ｌｉ 键只形成 于富锂正极材料 ꎬ 接近费米能级的氧离子的态密度 (ＤＯＳ) 增加会导致不稳定电子的演化 ꎬ 如图 ３(ｂ) 所 示 ꎮ 根据金属离子的电子带结构 ꎬ 他们认为阴离子 氧化还原可以与阳离子氧化还原同时发生 ꎬ 也可以 发生在阳离子氧化还原反应之后 ꎮ 近些年来 ꎬ 人们 把 Ｘ 射线吸收光谱 (ＸＡＳ) 和 Ｘ 射线光电子能谱 (ＸＰＳ) 等表征技术应用于研究富锂锰基层状中晶格 氧在充电平台处的氧化过程已取得很大进展 ꎮ Ｔａｒａｓｃｏｎ 等 [５１] 采用三维有序的 β￣Ｌｉ ２ ＩｒＯ ３ 作为富锂",
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      "text": "化学进展 ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
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      "text": "正极材料进行研究 ꎬ 他们通过分析 ＸＰＳ 图谱认为 β￣ Ｌｉ ２ ＩｒＯ ３ 的高活性是阳离子 (Ｉｒ ４＋ ) 和阴离子 ((Ｏ２) ｎ － ) 氧化还原协同作用的结果 ꎮ Ａｓｓａｔ 等 [５２] 以 Ｌｉ ２ Ｒｕ０􀆰 ２３ Ｓｎ ０􀆰 ２３ Ｏ３ 为研究材料 ꎬ 通过 ＸＡＳ 揭示了富锂正极材 料在充电过程中的电荷补偿机制建立了材料在循环 过程中结构演变的模型 ꎬ 证明了材料中的氧离子在 电化学反应过程中被氧化为过氧化物 / 超氧化物 ꎮ 但在以上工作中 ꎬ 由于氧元素光谱的直接定量难以 进行 ꎬ 都是依赖于过渡金属元素的光谱 ꎬ 存在一定的 局限性 ꎮ 进而 Ｔａｒａｓｃｏｎ 等 [５３] 利用硬 Ｘ 射线光电子 能谱 (ＨＡＸＰＥＳ) 直接跟踪晶格氧电子状态的变化 ꎬ 量化了氧在整个电化学反应过程中的可逆性 ꎬ 直观 地展现了其在富锂正极材料的长期循环过程中的持 久性 ꎮ 他们发现在 Ｌｉ １􀆰 ２ Ｎｉ ０􀆰 １３ Ｍｎ０􀆰５４ Ｃｏ ０􀆰 １３ Ｏ２ 材料中 ꎬ 氧的氧化还原贡献在初始循环后即趋于稳定 ꎬ 在材 料循环 ７０ 圈后 ꎬ 仍有超过三分之一的容量来自氧的 可逆氧化还原反应 ꎮ",
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      "text": "２􀆰 ３ 富锂锰基层状正极材料的结构演变及衰减 机理",
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      "text": "现有的研究已经明确富锂锰基正极材料在电化 学循环中会发生材料结构的尖晶石化 、 过渡金属离 子的还原以及缺陷结构的形成 ꎬ 而这些微观结构的 变化会不断加大材料极化阻抗 ꎬ 从而导致正极材料",
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      "text": "电压 / 放电比容量的不断衰减 [４５ꎬ ５４~５６] ꎮ 其中 ꎬ 表面 阻抗的增大会导致正极材料放电比容量的下降 ꎬ 内 部极化阻抗的增大会加速放电电压的下降 [５７] ꎮ 接 下来 ꎬ 本文会对这几种微观结构的发生及其关系进 行介绍 ꎮ",
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      "text": "Ｌｉｕ 等 [６７] 把铌离子掺杂到富锂锰基正极材料表",
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      "text": "Ｐｒｏｇｒｅｓｓ ｉｎ Ｃｈｅｍｉｓｔｒｙ ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
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      "text": "鲁志远等 : 锂离子电池富锂锰基层状正极材料的稳定性",
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      "text": "化学进展 ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
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      "text": "性后的材料首次放电比容高达 ３２０ ｍＡｈ􀅰ｇ －１ ꎬ 循环 ３００ 圈后 ꎬ 其放电比容量保留率为 ７１％ꎻ 在 ５ Ｃ 高倍 率下 ꎬ 其放电比容量仍有 １３６ ｍＡｈ 􀅰 ｇ －１ ꎬ 而未掺杂的 仅有 ８９ ｍＡｈ􀅰ｇ －１ ꎮ 他们根据结构特征和第一性原 理解释了改性后材料电化学性能得到大幅提升的原 因 :Ｔｉ ４＋ 掺杂可扩大 Ｌｉ ２Ｏ 的层间距以及提高氧化物 的电导率 ꎬ 而这些变化有助于提高材料表面离子和 电荷的传输速率进而提高材料的倍率性能 ꎮ",
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      "text": "３􀆰 ２ 过渡金属 (ＴＭ) 位掺杂",
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      "text": "结合上述对富锂锰基层状正极材料的结构演变 及衰减机理的研究 ꎬ 我们容易知道这种材料在循环 过程中容量急剧下降 、 电压平台衰减过快的原因之 一是过渡金属 (ＴＭ) 离子不断向锂层迁移 ꎬ 破坏了材 料的层状结构 ꎬ 使之向尖晶石结构转变 ꎮ 因此 ꎬ 选择 合适的掺杂离子取代过渡金属离子 ꎬ 增加迁移的势 垒 ꎬ 对于提高富锂材料在循环过程中的稳定性具有 十分重要的意义 ꎮ Ｊｉｎ 等 [７０] 采用铝离子掺杂富锂锰 基层状正极材料 ꎬ 掺杂后材料的电化学性能得到了 极大的提升 ꎬ 其在 ０􀆰 １ Ｃ 的电流密度下 ꎬ 放电比容量 达到 ３２３􀆰 ７ ｍＡｈ 􀅰 ｇ －１ ꎬ 在 ２０ Ｃ 的超高倍率下 ꎬ 材料的 放电比容量仍有 １２０ ｍＡｈ􀅰ｇ －１ ꎬ 同时材料的循环稳 定性也得到了明显提升 ꎬ 他们把电化学性能得到提 升归功于铝离子掺杂后在材料表面形成的尖晶石 ￣ 层状的异质结构 ꎬ 这种异质结构在稳定体系结构的 同时也提高了材料的电子电导率 ꎮ Ｗｕ 等 [７１] 研究了 镱元素在过渡金属层中的掺杂量对 Ｌｉ １􀆰 ２ Ｍｎ０􀆰５４ Ｎｉ ０􀆰 １３ Ｃｏ ０􀆰 １３－ ｘ Ｙｂ ｘ Ｏ２ 的影响 ꎮ 研究结果表明 ꎬ 由于 Ｙｂ-Ｏ 的结合能大于 Ｍ-Ｏ(Ｍ＝ＭｎꎬＮｉꎬＣｏ) 的结合能 ꎬ 适 宜 Ｙｂ 离子 ( ｘ ≤ ０􀆰 ００５) 的掺杂可以稳定材料中氧 的堆积 ꎬ 提升材料在 Ｌｉ ＋ 脱嵌过程中的稳定性 ꎬ 此外 ꎬ 镱作为一种多价元素 ꎬ 是电化学反应的活性物质 ꎬ 这 些性质有助于提升富锂锰基正极材料的稳定性和电 化学活性 ꎮ 但因为稀土元素和过渡金属元素的离子 半径相差较大 ꎬ 过量的掺杂 ( ｘ >０􀆰 ００５) 会导致 Ｙｂ 离子从过渡金属层迁入到 Ｌｉ 层中 ꎬ 并在材料表面形 成电化学惰性的 Ｙｂ２ Ｏ３ ꎬ 阻碍 Ｌｉ ＋ 的迁移 ꎬ 从而使得 材料的电化学性能急剧恶化 ꎮ",
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      "text": "半径接近 ꎬ 并且由于 Ｆ-Ｍ(Ｍ 表示过渡金属 ) 的键 能比 Ｏ-Ｍ 拥有的键能更高 ꎬ 因此常被用作掺杂元 素来取代材料中的 Ｏꎮ Ｘｉｅ 等 [７２] 通过 Ｍ-Ｆ 键部分 取代 Ｍ-Ｏ 键得到富锂正极材料 Ｌｉ [ Ｌｉ ０􀆰 １３３ Ｍｎ０􀆰４６７ Ｎｉ ０􀆰 ２ Ｃｏ ０􀆰 ２ ]Ｏ１􀆰９５ Ｆ０􀆰 ０５ ꎮ 恒流充放电测试结果显示 ꎬ 掺 杂后的材料在 ０􀆰 １ Ｃ 电流密度下循环 １００ 圈后容量 保有率仍有 ９２％ꎬ 材料优异的稳定性可归功于 Ｆ 的 掺杂可抑制 Ｍｎ 离子在充放电过程中的还原 ꎬ 减少 在首圈充电过程中氧在高压区对正极材料容量的贡 献 ꎬ 从而减少由于氧释放导致材料结构的转变 ꎮ Ｃｈｅｎ 等 [７３] 以 Ｓ 元素部分取代 Ｏ 元素 ꎬ 制得富锂正 极材料 Ｌｉ １􀆰 ２ Ｍｎ０􀆰６ Ｎｉ ０􀆰 ２ Ｏ１􀆰 ９７ Ｓ ０􀆰 ０３ ꎬ 恒流充放电结果显 示 ꎬ 改性后的材料首圈库仑效率高达 ９６􀆰 ０６％ꎬ 在 ５ Ｃ 高倍率下 ꎬ 可逆放电容量仍有 １１７ ｍＡｈ 􀅰 ｇ －１ ꎮ 他们 通过 ＶＡＳＰ 理论计算发现 ꎬ 未经 Ｓ 元素掺杂的正极 材料脱出和嵌入 Ｌｉ ＋ 所需能量相差 ２５９􀆰 ２１ ｅＶꎬ 而掺 杂后的正极材料脱出和嵌入 Ｌｉ ＋ 所需能量接近 ꎬ 分别 为 －１１３２􀆰 １４ ｅＶ 和 －１１２２􀆰 ７８ ｅＶꎬ 说明 Ｓ 元素的掺杂 可平衡锂离子的嵌入和脱嵌的能量 ꎬ 从而提升正极 材料在电化学反应过程中的结构稳定性 ꎮ",
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      "text": "成 、 微观结构的演变 ꎬ 我们也知道了氧释放 、 材料的 结构缺陷 、 晶体结构转变与电压衰减之间的关系 ꎬ 这 些阐述都指出了维护材料良好结晶度和保护富锂层 状材料表面结构的重要性 ꎬ 接下来我们主要以表面 包覆去加强正极材料与电解液接触面的强度以对抗 锂电池在电化学和物理上的疲劳以及利用材料的表 面处理去减少材料在循环过程中氧的释放两方面的 研究进展展开阐述 ꎮ",
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      "text": "Ｐｒｏｇｒｅｓｓ ｉｎ Ｃｈｅｍｉｓｔｒｙ ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
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      "text": "鲁志远等 : 锂离子电池富锂锰基层状正极材料的稳定性",
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      "text": "料具有高的比表面积 ꎬ 缩短了锂离子扩散路径 、 加快 了锂离子扩散速率从而提高了材料的倍率性能和循 环稳定性 ꎮ",
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      "text": "综上所述 ꎬ 富锂锰基正极材料的高容量来源于 Ｌｉ ２ＭｎＯ３ 组分的活化 ꎬ 但该活化过程伴随着晶格氧 释放 、 结构缺陷的生成及材料结构的不可逆转变 ꎬ 从 而导致了正极材料的电化学性能在长循环过程中不 断衰减 ꎮ 结合近些年来国内外进行的大量研究工作 ꎬ 我们发现利用体相掺杂和表面修饰能延缓材料微观 结构的转变 ꎬ 在一定程度上抑制正极材料电化学性能 的衰减 ꎬ 但无论是掺杂还是表面修饰本身都不能彻底 扫除富锂正极材料产业化的全部障碍 ꎮ 为使得这类 正极材料满足商业化要求 ꎬ 我们基于离子掺杂 、 表面 修饰各自存在的优缺点 ꎬ 认为离子掺杂和表面修饰相 结合的联合改性机制比单一的改性机制更具优势 ꎬ 相 信通过对此联合机制的系统研究 ꎬ 富锂锰基正极材料 在长循环过程中电压衰减 、 循环性能不佳等问题均能 得到明显改善 ꎬ 同时我们也认为此联合改性机制极可 能是未来电池材料改性发展方向之一 ꎮ",
      "text_preview": "综上所述 ꎬ 富锂锰基正极材料的高容量来源于 Ｌｉ ２ＭｎＯ３ 组分的活化 ꎬ 但该活化过程伴随着晶格氧 释放 、 结构缺陷的生成及材料结构的不可逆转变 ꎬ 从 而导致了正极材料的电化学性能在长循环过程中不 断衰减 ꎮ 结合近些年来国内外进行的大量研究工作 ꎬ 我们发现利用体相掺杂和表面修饰能延缓材料微观 结构的转变 ꎬ 在一定程度上抑制正极材料电化学性能 的衰减 ꎬ 但无论是掺杂还是表面修饰本身都不能彻底 扫除富锂正极材料产业化的全…",
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      "text_preview": "[ ７ ] Ｒｏｚｉｅｒ Ｐꎬ Ｔａｒａｓｃｏｎ Ｊ Ｍ. Ｊ. Ｅｌｅｃｔｒｏｃｈｅｍ. Ｓｏｃ.ꎬ ２０１５ꎬ １６２: Ａ２４９０.",
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      "text_preview": "[ ８ ] Ｍａｎｔｈｉｒａｍ Ａꎬ Ｋｎｉｇｈｔ Ｊ Ｃꎬ Ｍｙｕｎｇ Ｓ Ｔꎬ Ｏｈ Ｓ Ｍꎬ Ｓｕｎ Ｙ Ｋ. Ａｄｖ. Ｅｎｅｒｇｙ Ｍａｔｅｒ.ꎬ ２０１６ꎬ ６.",
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      "page_background_rgb": [
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      "background_delta": 0,
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      "truncation_marker": ""
    },
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      "ref": "#/texts/163",
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      "page_size": {
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      "text": "Ｊｅｏｍ￣Ｓｏｏ Ｋꎬ Ｊｏｈｎｓｏｎ Ｃ Ｓꎬ Ｖａｕｇｈｅｙ Ｊ Ｔꎬ Ｔｈａｃｋｅｒａｙ Ｍ Ｍꎬ Ｈａｃｋｎｅｙ Ｓ Ａꎬ Ｗｏｎｓｕｂ Ｙꎬ Ｇｒｅｙ Ｃ Ｐ. Ｃｈｅｍ. Ｍａｔｅｒ.ꎬ ２００４ꎬ １６: １９９６.",
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      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
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      "is_gray_background": false,
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      "edge_dark_ratios": {
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      "truncation_marker": ""
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      },
      "text": "Ｔｈａｃｋｅｒａｙ Ｍ Ｍꎬ Ｊｏｈｎｓｏｎ Ｃ Ｓꎬ Ｖａｕｇｈｅｙ Ｊ Ｔꎬ Ｌｉ Ｎꎬ Ｈａｃｋｎｅｙ Ｓ Ａ. Ｊ. Ｍａｔｅｒ. Ｃｈｅｍ.ꎬ ２００５ꎬ １５: ２２５７.",
      "text_preview": "Ｔｈａｃｋｅｒａｙ Ｍ Ｍꎬ Ｊｏｈｎｓｏｎ Ｃ Ｓꎬ Ｖａｕｇｈｅｙ Ｊ Ｔꎬ Ｌｉ Ｎꎬ Ｈａｃｋｎｅｙ Ｓ Ａ. Ｊ. Ｍａｔｅｒ. Ｃｈｅｍ.ꎬ ２００５ꎬ １５: ２２５７.",
      "word_count": 20,
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      "cleaned_text_preview": "",
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      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
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      "text": "Ｐａｒｋ Ｃ Ｗꎬ Ｋｉｍ Ｓ Ｈꎬ Ｍａｎｇａｎｉ Ｉ Ｒꎬ Ｌｅｅ Ｊ Ｈꎬ Ｂｏｏ Ｓꎬ Ｋｉｍ Ｊ. Ｍａｔｅｒ. Ｒｅｓ. Ｂｕｌｌ.ꎬ ２００７ꎬ ４２: １３７４.",
      "text_preview": "Ｐａｒｋ Ｃ Ｗꎬ Ｋｉｍ Ｓ Ｈꎬ Ｍａｎｇａｎｉ Ｉ Ｒꎬ Ｌｅｅ Ｊ Ｈꎬ Ｂｏｏ Ｓꎬ Ｋｉｍ Ｊ. Ｍａｔｅｒ. Ｒｅｓ. Ｂｕｌｌ.ꎬ ２００７ꎬ ４２: １３７４.",
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      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
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      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "unknown_text",
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      "column": "column_1_of_2",
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      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
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      "truncation_marker": ""
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      "ref": "#/texts/193",
      "page": 10,
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      "order": 193000,
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      "layout_page_order": 26,
      "bbox": [
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      },
      "text": "化学进展 ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
      "text_preview": "化学进展 ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
      "word_count": 5,
      "cleaned_text": "化学进展 ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
      "cleaned_text_preview": "化学进展 ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
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        "visual_text": false,
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      "truncation_marker": ""
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      "ref": "#/texts/141",
      "page": 10,
      "label": "page_header",
      "order": 141000,
      "source_page_order": 2,
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      "bbox": [
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      },
      "text": "综述与评论",
      "text_preview": "综述与评论",
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      "cleaned_text": "综述与评论",
      "cleaned_text_preview": "综述与评论",
      "included_in_body": false,
      "body_decision_reason": "docling_page_header",
      "parser_body_decision_reason": "docling_page_header",
      "production_usage": "",
      "visual_asset_type": "",
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      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "page_header",
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        "body_candidate": false,
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      },
      "text": "Ｇｕｏ Ｘ Ｊꎬ Ｌｉ Ｙ Ｘꎬ Ｚｈｅｎｇ Ｍꎬ Ｚｈｅｎｇ Ｊ Ｍꎬ Ｌｉ Ｊꎬ Ｇｏｎｇ Ｚ Ｌꎬ Ｙａｎｇ Ｙ. Ｊ. Ｐｏｗｅｒ Ｓｏｕｒｃｅｓꎬ ２００８ꎬ １８４: ４１４.",
      "text_preview": "Ｇｕｏ Ｘ Ｊꎬ Ｌｉ Ｙ Ｘꎬ Ｚｈｅｎｇ Ｍꎬ Ｚｈｅｎｇ Ｊ Ｍꎬ Ｌｉ Ｊꎬ Ｇｏｎｇ Ｚ Ｌꎬ Ｙａｎｇ Ｙ. Ｊ. Ｐｏｗｅｒ Ｓｏｕｒｃｅｓꎬ ２００８ꎬ １８４: ４１４.",
      "word_count": 24,
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      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
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      "page_size": {
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      },
      "text": "Ｊａｃｏｂ Ｃꎬ Ｊｉａｎ Ｊꎬ Ｚｈｕ Ｙꎬ Ｓｕ Ｑꎬ Ｗａｎｇ Ｈ. Ｊ.Ｍａｔｅｒ. Ｃｈｅｍ. Ａꎬ ２０１４ꎬ ２: ２２８３.",
      "text_preview": "Ｊａｃｏｂ Ｃꎬ Ｊｉａｎ Ｊꎬ Ｚｈｕ Ｙꎬ Ｓｕ Ｑꎬ Ｗａｎｇ Ｈ. Ｊ.Ｍａｔｅｒ. Ｃｈｅｍ. Ａꎬ ２０１４ꎬ ２: ２２８３.",
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      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
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      "page_size": {
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      "text": "Ｎａｙａｋ Ｐ Ｋꎬ Ｇｒｉｎｂｌａｔ Ｊꎬ Ｌｅｖｉ Ｍꎬ Ｍａｒｋｏｖｓｋｙ Ｂꎬ Ａｕｒｂａｃｈ Ｄ. Ｊ. Ｅｌｅｃｔｒｏｃｈｅｍ. Ｓｏｃ.ꎬ ２０１４ꎬ １６１: Ａ１５３４.",
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      "flags": {
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        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
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      "page_background_rgb": [
        255,
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        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.102,
        "bottom": 0.0,
        "left": 0.0,
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      },
      "excluded_risk_level": "high",
      "region_id": "p10:page_body:column_2_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/191",
      "page": 10,
      "label": "list_item",
      "order": 191000,
      "source_page_order": 52,
      "layout_order": 191,
      "layout_page_order": 53,
      "bbox": [
        261.46,
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        230.4,
        22.93
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      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "Ｚｈｕ Ｚꎬ Ｋｕｓｈｉｍａ Ａꎬ Ｙｉｎ Ｚꎬ Ｑｉ Ｌꎬ Ａｍｉｎｅ Ｋꎬ Ｌｕ Ｊꎬ Ｌｉ Ｊ. Ｎａｔｕｒｅ Ｅｎｅｒｇｙꎬ ２０１６ꎬ １.",
      "text_preview": "Ｚｈｕ Ｚꎬ Ｋｕｓｈｉｍａ Ａꎬ Ｙｉｎ Ｚꎬ Ｑｉ Ｌꎬ Ａｍｉｎｅ Ｋꎬ Ｌｕ Ｊꎬ Ｌｉ Ｊ. Ｎａｔｕｒｅ Ｅｎｅｒｇｙꎬ ２０１６ꎬ １.",
      "word_count": 18,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "unknown_text",
      "zone": "bottom_margin",
      "column": "column_2_of_2",
      "column_index": 2,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
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        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
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      ],
      "page_background_rgb": [
        255,
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        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.059,
        "bottom": 0.0,
        "left": 0.0,
        "right": 0.02
      },
      "excluded_risk_level": "high",
      "region_id": "p10:bottom_margin:column_2_of_2:white",
      "truncation_marker": ""
    },
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      "ref": "#/texts/192",
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      "label": "list_item",
      "order": 192000,
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      "layout_order": 192,
      "layout_page_order": 54,
      "bbox": [
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      "page_size": {
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        "height": 769.58
      },
      "text": "Ｓｅｏ Ｄ Ｈꎬ Ｌｅｅ Ｊꎬ Ｕｒｂａｎ Ａꎬ Ｍａｌｉｋ Ｒꎬ Ｋａｎｇ Ｓꎬ Ｃｅｄｅｒ Ｇ. Ｎａｔｕｒｅ",
      "text_preview": "Ｓｅｏ Ｄ Ｈꎬ Ｌｅｅ Ｊꎬ Ｕｒｂａｎ Ａꎬ Ｍａｌｉｋ Ｒꎬ Ｋａｎｇ Ｓꎬ Ｃｅｄｅｒ Ｇ. Ｎａｔｕｒｅ",
      "word_count": 14,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "unknown_text",
      "zone": "bottom_margin",
      "column": "column_2_of_2",
      "column_index": 2,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
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      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.067,
        "bottom": 0.0,
        "left": 0.022,
        "right": 0.067
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      "excluded_risk_level": "high",
      "region_id": "p10:bottom_margin:column_2_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/194",
      "page": 10,
      "label": "page_footer",
      "order": 194000,
      "source_page_order": 55,
      "layout_order": 193,
      "layout_page_order": 55,
      "bbox": [
        465.62,
        752.8,
        26.2,
        9.63
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      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "􀅰 １５１３ 􀅰",
      "text_preview": "􀅰 １５１３ 􀅰",
      "word_count": 3,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "docling_page_footer",
      "parser_body_decision_reason": "docling_page_footer",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "page_footer",
      "zone": "bottom_margin",
      "column": "column_2_of_2",
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      "column_count": 2,
      "flags": {
        "docling_non_body_label": true,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
        255,
        255
      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.096,
        "bottom": 0.0,
        "left": 0.0,
        "right": 0.0
      },
      "excluded_risk_level": "low",
      "region_id": "p10:bottom_margin:column_2_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/195",
      "page": 11,
      "label": "page_header",
      "order": 195000,
      "source_page_order": 1,
      "layout_order": 194,
      "layout_page_order": 1,
      "bbox": [
        19.74,
        27.4,
        35.06,
        9.03
      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "Ｒｅｖｉｅｗ",
      "text_preview": "Ｒｅｖｉｅｗ",
      "word_count": 1,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "docling_page_header",
      "parser_body_decision_reason": "docling_page_header",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "page_header",
      "zone": "top_margin",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": true,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        187,
        142,
        76
      ],
      "page_background_rgb": [
        255,
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        255
      ],
      "background_delta": 179,
      "background_class": "colored",
      "is_gray_background": false,
      "has_frame_evidence": true,
      "edge_dark_ratios": {
        "top": 0.925,
        "bottom": 0.928,
        "left": 0.859,
        "right": 0.808
      },
      "excluded_risk_level": "low",
      "region_id": "p11:top_margin:column_1_of_2:colored",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/197",
      "page": 11,
      "label": "text",
      "order": 197000,
      "source_page_order": 3,
      "layout_order": 195,
      "layout_page_order": 2,
      "bbox": [
        35.27,
        55.89,
        72.97,
        9.63
      ],
      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "Ｃｈｅｍ.ꎬ ２０１６ꎬ ８: ６９２.",
      "text_preview": "Ｃｈｅｍ.ꎬ ２０１６ꎬ ８: ６９２.",
      "word_count": 4,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "empty_after_cleaning",
      "parser_body_decision_reason": "empty_after_cleaning",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "unknown_text",
      "zone": "top_margin",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
        255,
        255,
        255
      ],
      "page_background_rgb": [
        255,
        255,
        255
      ],
      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.071,
        "bottom": 0.0,
        "left": 0.089,
        "right": 0.022
      },
      "excluded_risk_level": "medium",
      "region_id": "p11:top_margin:column_1_of_2:white",
      "truncation_marker": ""
    },
    {
      "ref": "#/texts/198",
      "page": 11,
      "label": "list_item",
      "order": 198000,
      "source_page_order": 4,
      "layout_order": 196,
      "layout_page_order": 3,
      "bbox": [
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        230.46,
        36.02
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      "page_size": {
        "width": 501.76,
        "height": 769.58
      },
      "text": "ＭｃＣａｌｌａ Ｅꎬ Ａｂａｋｕｍｏｖ Ａ Ｍꎬ Ｓａｕｂａｎｅｒｅ Ｍꎬ Ｆｏｉｘ Ｄꎬ Ｂｅｒｇ Ｅ Ｊꎬ Ｒｏｕｓｓｅ Ｇꎬ Ｄｏｕｂｌｅｔ Ｍ Ｌꎬ Ｇｏｎｂｅａｕ Ｄꎬ Ｎｏｖａｋ Ｐꎬ Ｖａｎ Ｔｅｎｄｅｌｏｏ Ｇꎬ Ｄｏｍｉｎｋｏ Ｒꎬ Ｔａｒａｓｃｏｎ Ｊ Ｍ. Ｓｃｉｅｎｃｅꎬ ２０１５ꎬ ３５０: １５１６.",
      "text_preview": "ＭｃＣａｌｌａ Ｅꎬ Ａｂａｋｕｍｏｖ Ａ Ｍꎬ Ｓａｕｂａｎｅｒｅ Ｍꎬ Ｆｏｉｘ Ｄꎬ Ｂｅｒｇ Ｅ Ｊꎬ Ｒｏｕｓｓｅ Ｇꎬ Ｄｏｕｂｌｅｔ Ｍ Ｌꎬ Ｇｏｎｂｅａｕ Ｄꎬ Ｎｏｖａｋ Ｐꎬ Ｖａｎ Ｔｅｎｄｅｌｏｏ Ｇꎬ Ｄｏｍｉｎｋｏ Ｒꎬ Ｔａｒａｓｃｏｎ Ｊ Ｍ. Ｓｃｉｅｎｃｅꎬ ２０１５ꎬ ３５０: １５１６.",
      "word_count": 33,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_body_candidate",
      "parser_body_decision_reason": "outside_body_flow_body_candidate",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "body_candidate_excluded",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
      "column_count": 2,
      "flags": {
        "docling_non_body_label": false,
        "page_margin_noise": false,
        "metadata_line": false,
        "affiliation_block": false,
        "reference_item": false,
        "body_sentence": false,
        "body_candidate": true,
        "body_heading": false,
        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
        "caption_continuation_used_by_asset": false
      },
      "background_rgb": [
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      "page_background_rgb": [
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        255
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      "background_delta": 0,
      "background_class": "white",
      "is_gray_background": false,
      "has_frame_evidence": false,
      "edge_dark_ratios": {
        "top": 0.042,
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        "left": 0.036,
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      },
      "excluded_risk_level": "high",
      "region_id": "p11:page_body:column_1_of_2:white",
      "truncation_marker": ""
    },
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      "ref": "#/texts/199",
      "page": 11,
      "label": "list_item",
      "order": 199000,
      "source_page_order": 5,
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      "layout_page_order": 4,
      "bbox": [
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        230.17,
        22.83
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      "page_size": {
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        "height": 769.58
      },
      "text": "Ａｓｓａｔ Ｇꎬ Ｉａｄｅｃｏｌａ Ａꎬ Ｄｅｌａｃｏｕｒｔ Ｃꎬ Ｄｅｄｒｙｖｅｒｅ Ｒꎬ Ｔａｒａｓｃｏｎ Ｊ Ｍ. Ｃｈｅｍ. Ｍａｔｅｒ.ꎬ ２０１７ꎬ ２９: ９７１４.",
      "text_preview": "Ａｓｓａｔ Ｇꎬ Ｉａｄｅｃｏｌａ Ａꎬ Ｄｅｌａｃｏｕｒｔ Ｃꎬ Ｄｅｄｒｙｖｅｒｅ Ｒꎬ Ｔａｒａｓｃｏｎ Ｊ Ｍ. Ｃｈｅｍ. Ｍａｔｅｒ.ꎬ ２０１７ꎬ ２９: ９７１４.",
      "word_count": 16,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
      "column_index": 1,
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      "flags": {
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        "body_candidate": false,
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        "heading_kind": null,
        "has_front_matter_zone": false,
        "visual_text": false,
        "publisher_landing_page": false,
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      "background_class": "white",
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      "excluded_risk_level": "high",
      "region_id": "p11:page_body:column_1_of_2:white",
      "truncation_marker": ""
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      "label": "list_item",
      "order": 200000,
      "source_page_order": 6,
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      "layout_page_order": 5,
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        22.83
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      "page_size": {
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        "height": 769.58
      },
      "text": "Ａｓｓａｔ Ｇꎬ Ｉａｄｅｃｏｌａ Ａꎬ Ｆｏｉｘ Ｄꎬ Ｄｅｄｒｙｖｅｒｅ Ｒꎬ Ｔａｒａｓｃｏｎ Ｊ Ｍ. ＡＣＳ Ｅｎｅｒｇｙ Ｌｅｔｔ.ꎬ ２０１８ꎬ ３: ２７２１.",
      "text_preview": "Ａｓｓａｔ Ｇꎬ Ｉａｄｅｃｏｌａ Ａꎬ Ｆｏｉｘ Ｄꎬ Ｄｅｄｒｙｖｅｒｅ Ｒꎬ Ｔａｒａｓｃｏｎ Ｊ Ｍ. ＡＣＳ Ｅｎｅｒｇｙ Ｌｅｔｔ.ꎬ ２０１８ꎬ ３: ２７２１.",
      "word_count": 17,
      "cleaned_text": "",
      "cleaned_text_preview": "",
      "included_in_body": false,
      "body_decision_reason": "outside_body_flow_list_item",
      "parser_body_decision_reason": "outside_body_flow_list_item",
      "production_usage": "",
      "visual_asset_type": "",
      "visual_asset_label": "",
      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "unknown_text",
      "zone": "page_body",
      "column": "column_1_of_2",
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      "column_count": 2,
      "flags": {
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        "metadata_line": false,
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        "body_sentence": false,
        "body_candidate": false,
        "body_heading": false,
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        "has_front_matter_zone": false,
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      "text": "􀅰 １５１４ 􀅰",
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      "text": "化 学 进 展",
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      "text": "Ａｎ Ｊꎬ Ｓｈｉ Ｌꎬ Ｃｈｅｎ Ｇꎬ Ｌｉ Ｍꎬ Ｌｉｕ Ｈꎬ Ｙｕａｎ Ｓꎬ Ｃｈｅｎ Ｓꎬ Ｚｈａｎｇ Ｄ. Ｊ. Ｍａｔｅｒ. Ｃｈｅｍ. Ａꎬ ２０１７ꎬ ５: １９７３８.",
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      "text": "Ｌｅｅ Ｈꎬ Ｌｉｍ Ｓ Ｂꎬ Ｋｉｍ Ｊ Ｙꎬ Ｊｅｏｎｇ Ｍꎬ Ｐａｒｋ Ｙ Ｊꎬ Ｙｏｏｎ Ｗ Ｓ. ＡＣＳ Ａｐｐｌ. Ｍａｔｅｒ. Ｉｎｔｅｒｆａｃｅｓꎬ ２０１８ꎬ １０: １０８０４.",
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      "text": "Ｘｉａ Ｑꎬ Ｚｈａｏ Ｘꎬ Ｘｕ Ｍꎬ Ｄｉｎｇ Ｚꎬ Ｌｉｕ Ｊꎬ Ｃｈｅｎ Ｌꎬ Ｉｖｅｙ Ｄ Ｇꎬ Ｗｅｉ Ｗ. Ｊ. Ｍａｔｅｒ. Ｃｈｅｍ. Ａꎬ ２０１５ꎬ ３: ３９９５.",
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      "text": "Ｍａ Ｄꎬ Ｌｉ Ｙꎬ Ｗｕ Ｍꎬ Ｄｅｎｇ Ｌꎬ Ｒｅｎ Ｘꎬ Ｚｈａｎｇ Ｐ. Ａｃｔａ Ｍａｔｅｒ.ꎬ ２０１６ꎬ １１２: １１.",
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      "text": "Ｌｉ Ｘꎬ Ｚｈａｎｇ Ｋꎬ Ｍｉｔｌｉｎ Ｄꎬ Ｐａｅｋ Ｅꎬ Ｗａｎｇ Ｍꎬ Ｊｉａｎｇ Ｆꎬ Ｈｕａｎｇ Ｙꎬ Ｙａｎｇ Ｚꎬ Ｇｏｎｇ Ｙꎬ Ｇｕ Ｌꎬ Ｚｈａｏ Ｗꎬ Ｄｕ Ｙꎬ Ｚｈｅｎｇ Ｊ. Ｓｍａｌｌꎬ ２０１８ꎬ １４.",
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      "text": "Ｚｈｕ Ｚꎬ Ｃａｉ Ｆꎬ Ｙｕ Ｊ. Ｉｏｎｉｃｓꎬ ２０１６ꎬ ２２: １３５３.",
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      "text": "Ｐａｄｈｉ Ａ Ｋꎬ Ｎａｎｊｕｎｄａｓｗａｍｙ Ｋ Ｓꎬ Ｇｏｏｄｅｎｏｕｇｈ Ｊ Ｂ. Ｊ. Ｅｌｅｃｔｒｏｃｈｅｍ. Ｓｏｃ.ꎬ １９９７ꎬ １４４: １１８８.",
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      "text": "Ｏｋａｍｏｔｏ Ｙ. Ｊ. Ｅｌｅｃｔｒｏｃｈｅｍ. Ｓｏｃ.ꎬ ２０１２ꎬ １５９: Ａ１５２.",
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      "text": "Ｇｕ Ｍꎬ Ｇｅｎｃ Ａꎬ Ｂｅｌｈａｒｏｕａｋ Ｉꎬ Ｗａｎｇ Ｄꎬ Ａｍｉｎｅ Ｋꎬ Ｔｈｅｖｕｔｈａｓａｎ Ｓꎬ Ｂａｅｒ Ｄ Ｒꎬ Ｚｈａｎｇ Ｊ Ｇꎬ Ｂｒｏｗｎｉｎｇ Ｎ Ｄꎬ Ｌｉｕ Ｊꎬ Ｗａｎｇ Ｃ. Ｃｈｅｍ. Ｍａｔｅｒ.ꎬ ２０１３ꎬ ２５: ２３１９.",
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      "text": "Ｅｒｉｃｋｓｏｎ Ｅ Ｍꎬ Ｓｃｌａｒ Ｈꎬ Ｓｃｈｉｐｐｅｒ Ｆꎬ Ｌｉｕ Ｊꎬ Ｔｉａｎ Ｒꎬ Ｇｈａｎｔｙ Ｃꎬ Ｂｕｒｓｔｅｉｎ Ｌꎬ Ｌｅｉｆｅｒ Ｎꎬ Ｇｒｉｎｂｌａｔ Ｊꎬ Ｔａｌｉａｎｋｅｒ Ｍꎬ Ｓｈｉｎ Ｊ Ｙꎬ Ｌａｍｐｅｒｔ Ｊ Ｋꎬ Ｍａｒｋｏｖｓｋｙ Ｂꎬ Ｆｒｅｎｋｅｌ Ａ Ｉꎬ Ａｕｒｂａｃｈ Ｄ. Ａｄｖ. Ｅｎｅｒｇｙ Ｍａｔｅｒ.ꎬ ２０１７ꎬ ７ (１８):１７００７０８􀆰 １.",
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      "text": "Ｑｉｕ Ｂꎬ Ｚｈａｎｇ Ｍꎬ Ｗｕ Ｌꎬ Ｗａｎｇ Ｊꎬ Ｘｉａ Ｙꎬ Ｑｉａｎ Ｄꎬ Ｌｉｕ Ｈꎬ Ｈｙ Ｓꎬ Ｃｈｅｎ Ｙꎬ Ａｎ Ｋꎬ Ｚｈｕ Ｙꎬ Ｌｉｕ Ｚꎬ Ｍｅｎｇ Ｙ Ｓ. Ｎａｔｕｒｅ Ｃｏｍｍｕｎｉｃａｔｉｏｎｓꎬ ２０１６ꎬ ７.",
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      "body_decision_reason": "outside_body_flow_body_candidate",
      "parser_body_decision_reason": "outside_body_flow_body_candidate",
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      "text": "Ｚｈｅｎｇ Ｆꎬ Ｄｅｎｇ Ｑꎬ Ｚｈｏｎｇ Ｗꎬ Ｏｕ Ｘꎬ Ｐａｎ Ｑꎬ Ｌｉｕ Ｙꎬ Ｘｉｏｎｇ Ｘꎬ Ｙａｎｇ Ｃꎬ Ｃｈｅｎ Ｙꎬ Ｌｉｕ Ｍ. ＡＣＳ Ｓｕｓｔａｉｎ Ｃｈｅｍ. Ｅｎｇ.ꎬ ２０１８ꎬ ６: １６３９９.",
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      "included_in_body": false,
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      "production_usage": "",
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      "visual_asset_caption_preview": "",
      "visual_asset_anchor_ref": "",
      "inside_body_region": false,
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      "role_guess": "body_candidate_excluded",
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      "text": "Ｌｕ Ｙꎬ Ｓｈｉ Ｓ Ｌꎬ Ｙａｎｇ Ｆꎬ Ｚｈａｎｇ Ｔ Ｙꎬ Ｎｉｕ Ｈ Ｙꎬ Ｗａｎｇ Ｔ. Ｊ. Ａｌｌｏｙｓ Ｃｏｍｐｄ.ꎬ ２０１８ꎬ ７６７: ２３.",
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      "included_in_body": false,
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      "inside_body_region": false,
      "body_region_id": null,
      "role_guess": "unknown_text",
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      "text": "Ｐｒｏｇｒｅｓｓ ｉｎ Ｃｈｅｍｉｓｔｒｙ ꎬ ２０２０ꎬ ３２(１０): １５０４~１５１４",
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