10-elsevier-tiny-body

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• p1 front_summary coverage=0.0: The practical application of Li-rich layered oxides is impeded by its cycle instability, poor rate capability and serious voltage decay. Here, nano-sized spinel Li 4 Ti 5 O 12 (LTO) is constructed on Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 (LLNCMO). The distinctly
• p1 front_summary coverage=0.0: With the rapid expansion of portable electronics, electric ve- hicles and power grid, the existing lithium-ion batteries (LIBs) as an important power source urgently need to be ameliorated. [ 1 , 2 ] Especially, the insufficient energy-density of the cathode mat
• p4 scientific_body coverage=0.0: LLNCMO material. In the enlarged display of the (003) peaks ( Fig. 1 b), the peaks of the coated LTO@LLNCMO material obviously shifts to lower values illustrating the increase of c axis, which is beneficial for the Li-ion diffusion along the Li layer. [24]
• p4 scientific_body coverage=0.0: The morphologies and microstructures of as-prepared materi- als were observed in SEM and TEM images to confirm the in- fluence of LTO surface modification on the morphology, they are shown in Fig. 1 c–h. SEM images demonstrate that the size of nanoparticles show
• p4 scientific_body coverage=0.0: Atomic scale HAADF-STEM was used to clarify the surface and interface structures before and after LTO-coating LLNCMO materi- als, results are shown in Fig. 3 . For bare LLNCMO material ( Fig. 3 a), it is demonstrated that the well crystallization extends from
• p4 scientific_body coverage=0.0: Mn 4 + ions or oxygen vacancies are engendered in the synthetic process. [27] After LTO-modification, the average oxidation states of Mn ions in LTO@LLNCMO material still maintain about + 3.77 with the same level in LLNCMO material. [ 27 , 28 ] The XPS of O1s i
• p5 scientific_body coverage=0.0: crystal lattice and impurity lithium oxides on the surface of the layered cathode materials, respectively. [ 27 , 32 ] Compared to the O1s spectra in LLNCMO material, the peak at 533.97 eV disappears indicating more excellent surface stability in LTO coated ma
• p5 scientific_body coverage=0.0: To examine the variation of cycling stability and the voltage de- cay of LLNCMO modified by ultrathin LTO heteroepitaxial coating layer at high current density, the charge and discharge of LLNCMO and LTO@LLNCMO cathodes are continued to 500 cycles at 2 C as sho
• p6 back_matter coverage=0.0: This work was supported by the National Natural Science Foun- dation of China ( 51702148 , 51802139 ), Henan Science and Tech- nology Research Program ( 182102410074 , 172102410047 ) and the Training Plan of Young Backbone Teachers in Colleges and Univer- siti
• p6 scientific_body coverage=0.0: respectively. Except for at 0.1 C, the average discharge capacities of the LTO-coated cathode are all enhanced at every current den- sity. Specifically, the average discharge capacity of LTO@LLNCMO cathode is 104.7 mAh g –1 at 10 C considerably higher than that