文献类型：期刊文献

英文题名：Synergistic Bulk-to-Surface Modification of Ni-Rich Cathodes for High-Performance Lithium-Ion Batteries

作者：Xu, Mengyao[1];Zhu, Chengxin[1];Qiu, Jinkai[1];Lian, Cheng[1,2];Li, Jingkun[1];Su, Haiping[1];Liu, Honglai[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：8

期号：17

起止页码：12673

外文期刊名：ACS APPLIED ENERGY MATERIALS

收录：;EI(收录号：20253719157177);WOS:【SCI-EXPANDED(收录号:WOS:001559040600001)】；

基金：This work was sponsored by the National Key R&D Program of China (2022YFA1503501), the Fundamental Research Funds for the Central Universities (2022ZFJH04), and the National Natural Science Foundation of China (No. 22278127, 22078088, 22408096).

语种：英文

外文关键词：Ni-rich layered cathodes; lithium-ion batteries; high-voltage; bulk-to-surface modification; structuralstability

摘要：Ni-rich layered cathodes are key materials for next-generation lithium-ion batteries (LIBs) aiming for a higher energy density and lower cost. However, their bulk and interface structural instability significantly impair their electrochemical performance, hindering their widespread application. Herein, we report a bulk-to-surface modification strategy for Ni-rich cathodes by Ti doping and Gd2O3 surface coating (NCMT@Gd2O3). In this work, Ti doping and Gd2O3 coating synergistically suppress cation mixing, lattice oxygen loss, and surface side reactions, thereby enhancing the structural and electrochemical stability, particularly under high-voltage operation (>= 4.5 V). As a result, the NCMT@Gd2O3 cathode demonstrates excellent electrochemical performance with a high discharge capacity of 194.14 mAh g-1 and a high capacity retention ratio of 89.69% after 100 cycles (1C, cutoff voltage of 4.5 V). This work paves the way for the development of next-generation high-energy-density LIBs.