文献类型：期刊文献

英文题名：Integrating trace Ti-doping and LiYO2-coating to stabilize Ni-rich cathodes for lithium-ion batteries

作者：Zheng, Hanwen[1];Wang, Zhihong[1];Chen, Ling[1];Jiang, Hao[1,2];Li, Chunzhong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Frontiers Sci Ctr Materiobiol & Dynam Chem, Minist Educ,Key Lab Ultra fine Mat, Shanghai 200237, Peoples R China

年份：2023

卷号：80

起止页码：74

外文期刊名：PARTICUOLOGY

收录：;EI(收录号：20231113709061);WOS:【SCI-EXPANDED(收录号:WOS:000949490200001)】；

基金：Acknowledgements This work was supported by the National Natural Science Foundation of China (grant No. 21975074) , the Innovation Program of Shanghai Municipal Education Commission, and the Funda- mental Research Funds for the Central Universities.

语种：英文

外文关键词：Ni-rich cathodes; Dualmodification; Specific energy density; Li-ion batteries

摘要：Ni-rich layered cathodes have become the promising candidates for the next-generation high-energy Li -ion batteries due to their high energy density and competitive cost. However, they suffer from rapid capacity fading due to the structural and interfacial instability upon long-term operation. Herein, the Ti -doped and LiYO2-coated Ni-rich layered cathode has been synthesized via a facile one-step sintering strategy, which significantly restrains the interfacial parasitic side reactions and enhances the structural stability. Specifically, the trace Ti4+ doping greatly stabilizes the lattice oxygen and alleviates the Li/Ni disorder while the LiYO2 coating layer can prevent the erosion of the cathode by the electrolyte during cycles. As a result, the Ti-NCM83@LYO delivers a high specific capacity of 135 mAh g-1 even at 10C and there is almost no capacity loss at 1C for 100 cycles. This work provides a simple one-step dual -modi-fication strategy to meet the commercial requirements of Ni-rich cathodes.(c) 2023 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).