{ "summary": { "count": 6, "indexable_count": 6, "suppressed_count": 0, "by_type": { "figure": 6 }, "by_caption_source": { "direct_caption_ref": 5, "missing_caption": 1 }, "by_duplicate_reason": { "": 6 }, "missing_caption_count": 1 }, "visual_assets": [ { "asset_index": 1, "element_id": "c29fbe0f-b965-5a14-8aec-0c7a94ee03d3", "element_type": "figure", "label": "Docling Figure 1", "page": 1, "bbox": [ 201.74, 410.5, 334.56, 168.78 ], "caption": "", "caption_preview": "", "caption_source": "missing_caption", "section": "H I G H L I G H T S", "confidence": 0.55, "suppress_in_index": false, "duplicate_of": "", "duplicate_reason": "", "visual_group_id": "", "parent_visual_label": "", "parent_visual_type": "", "region_rescue_reason": "" }, { "asset_index": 2, "element_id": "3b56de3a-f6df-5bf9-9529-5263e22feb4d", "element_type": "figure", "label": "Fig. 1", "page": 4, "bbox": [ 39.05, 271.2, 518.3, 436.69 ], "caption": "Fig. 1. (a) Schematic illustrating the suppression of surface degradation (Mn dissolution, O2 evolution, and rock-salt phase transformation) by the carbon-coated LiFePO4 (C-LFP) layer. (b) X-ray diffraction (XRD) pattern of pristine Li-rich Mn-based layered oxide (LMR); the inset highlights superlattice reflections (20 -23 ◦ ). (c) XRD patterns of samples with various C-LFP loadings. (d) Comparison of LMR@F2.0 with the corresponding physical mixture (LMR + 2.0 wt% C-LFP).", "caption_preview": "Fig. 1. (a) Schematic illustrating the suppression of surface degradation (Mn dissolution, O2 evolution, and rock-salt phase transformation) by the carbon-coated LiFePO4 (C-LFP) layer. (b) X-ray diffraction (XRD) patter…", "caption_source": "direct_caption_ref", "section": "3.1. Synthesis and characterization of LFP-coated LMR (LMR@Fx)", "confidence": 0.82, "suppress_in_index": false, "duplicate_of": "", "duplicate_reason": "", "visual_group_id": "", "parent_visual_label": "", "parent_visual_type": "", "region_rescue_reason": "" }, { "asset_index": 3, "element_id": "c701afa9-9ca7-577d-bfd8-f379357fe3d9", "element_type": "figure", "label": "Fig. 2", "page": 5, "bbox": [ 39.28, 391.82, 515.49, 296.03 ], "caption": "Fig. 2. Field-emission scanning electron microscopy (FE-SEM) images of the (a) hydroxide precursor and (b) pristine LMR revealing a hierarchical structure composed of spherical secondary and granular primary particles. (c -f) Surface FE-SEM images of LMR@F0.5 -;2.0 demonstrating the formation of a discrete islandlike coating morphology progressively densifying with increasing C-LFP loading. (g) Cross-sectional FE-SEM image and (h) corresponding energy-dispersive X-ray spectroscopy (EDS) line profile of LMR@F0.75. (i -l) EDS elemental mappings of Fe (red) obtained for LMR@F0.5 -;2.0. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)", "caption_preview": "Fig. 2. Field-emission scanning electron microscopy (FE-SEM) images of the (a) hydroxide precursor and (b) pristine LMR revealing a hierarchical structure composed of spherical secondary and granular primary particles. …", "caption_source": "direct_caption_ref", "section": "3.2. Enhanced electrochemical performance", "confidence": 0.82, "suppress_in_index": false, "duplicate_of": "", "duplicate_reason": "", "visual_group_id": "", "parent_visual_label": "", "parent_visual_type": "", "region_rescue_reason": "" }, { "asset_index": 4, "element_id": "d6d9b31f-70d9-55cd-b673-d417ab659216", "element_type": "figure", "label": "Fig. 3", "page": 6, "bbox": [ 38.6, 56.38, 517.79, 317.71 ], "caption": "Fig. 3. (a) Initial charge -discharge voltage profiles recorded at 0.1C. (b) Results of rate capability tests. (c) Capacity retention and coulombic efficiency evolution during 200 cycles at 0.5C. Charge -discharge voltage profiles of (d) pristine LMR and (e) LMR@F0.75 at selected cycles (initial, 1st, 50th, 100th, 150th, and 200th). (f) Evolution of average discharge voltage over 200 cycles.", "caption_preview": "Fig. 3. (a) Initial charge -discharge voltage profiles recorded at 0.1C. (b) Results of rate capability tests. (c) Capacity retention and coulombic efficiency evolution during 200 cycles at 0.5C. Charge -discharge volta…", "caption_source": "direct_caption_ref", "section": "3.2. Enhanced electrochemical performance", "confidence": 0.82, "suppress_in_index": false, "duplicate_of": "", "duplicate_reason": "", "visual_group_id": "", "parent_visual_label": "", "parent_visual_type": "", "region_rescue_reason": "" }, { "asset_index": 5, "element_id": "51269918-cace-5254-b5a3-3eee9bd7d53b", "element_type": "figure", "label": "Fig. 4", "page": 7, "bbox": [ 39.4, 55.85, 518.05, 311.52 ], "caption": "Fig. 4. (a) Volume resistivities of different electrode. (b -d) Li-ion diffusion coefficients ( D Li + ) as functions of voltage determined during discharge: (b) full voltage range, (c) magnified view of the 3.2 -3.5 V region showing enhanced kinetics near the LFP activation potential, and (d) the 3.6 -4.0 V region. Nyquist plots of LMR half-cells recorded (e) in the fresh state (at open-circuit voltage) and (f) after the third initial cycle.", "caption_preview": "Fig. 4. (a) Volume resistivities of different electrode. (b -d) Li-ion diffusion coefficients ( D Li + ) as functions of voltage determined during discharge: (b) full voltage range, (c) magnified view of the 3.2 -3.5 V …", "caption_source": "direct_caption_ref", "section": "3.3. Synergistic promotional effects of C-LFP islands on electrochemical reaction kinetics", "confidence": 0.82, "suppress_in_index": false, "duplicate_of": "", "duplicate_reason": "", "visual_group_id": "", "parent_visual_label": "", "parent_visual_type": "", "region_rescue_reason": "" }, { "asset_index": 6, "element_id": "d3cdff31-c4c9-5ad1-9320-6d7986df9bc6", "element_type": "figure", "label": "Fig. 5", "page": 9, "bbox": [ 39.74, 54.63, 515.75, 435.71 ], "caption": "Fig. 5. (a -l) High-resolution transmission electron microscopy (HRTEM) analysis of electrodes after three initial cycles. Low-magnification images of a single particle of (a) pristine LMR and (g) LMR@F0.75. (b, h) HRTEM images focusing on the near-surface region. (c, d) Magnified lattice image and corresponding fast Fourier transform (FFT) pattern of the pristine LMR surface revealing the formation of a degraded rock-salt phase ( Fm 3 m ). (e, f) Magnified lattice image and FFT pattern of pristine LMR bulk showing the original layered structure ( R 3 m ). (i, j) Magnified lattice image and FFT pattern of the LMR@F0.75 surface confirming the preservation of the Li2MnO3-like superlattice structure ( C 2/ m ). (k, l) Magnified lattice image and FFT pattern of the LMR@F0.75 bulk ( R 3 m ). (m, n) In situ differential electrochemical mass spectrometry profiles showing O2 and CO2 evolution during the first charge. (o) Differential scanning calorimetry curves of charged cathodes.", "caption_preview": "Fig. 5. (a -l) High-resolution transmission electron microscopy (HRTEM) analysis of electrodes after three initial cycles. Low-magnification images of a single particle of (a) pristine LMR and (g) LMR@F0.75. (b, h) HRTE…", "caption_source": "direct_caption_ref", "section": "3.4. Elucidating the multifunctional stabilization mechanism", "confidence": 0.82, "suppress_in_index": false, "duplicate_of": "", "duplicate_reason": "", "visual_group_id": "", "parent_visual_label": "", "parent_visual_type": "", "region_rescue_reason": "" } ] }