文献类型：期刊文献

英文题名：Al- and Nb-Comodified Ni-Rich NCM Cathode for High-Performance Lithium-Ion Batteries

作者：Zhu, Chengxin[1];Xu, Mengyao[2];Huang, Kai[2];Lian, Cheng[1,2];Su, Haiping[2];Liu, Honglai[1,2]

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

年份：2024

卷号：63

期号：6

起止页码：2740

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20240715546395);WOS:【SCI-EXPANDED(收录号:WOS:001159003300001)】；

基金：This work was sponsored by the National Key Research and Development Program of China (No. 2022YFA1503501), the State Key Laboratory of Clean Energy Utilization (Open Fund Project No. ZJUCEU2021005), and the Fundamental Research Funds for the Central Universities (2022ZFJH004). This work was supported by the 21C Innovation Laboratory, Contemporary Amperex Technology Ltd. (Project No. 21C-OP-202312).

语种：英文

外文关键词：Aluminum - Cathodes - Cobalt compounds - Ions - Lithium compounds - Lithium-ion batteries - Manganese compounds - Niobium - Oxygen - Stability - Surface reactions

摘要：Layered cathodes with a high nickel content (Ni >= 80%) are viewed as the ideal choice for the future of lithium-ion batteries (LIBs) because of their high specific capacity. However, the bad cyclic and thermal stability impedes its promotion because of the increase in the nickel content. Herein, it has been demonstrated that Al- and Nb-codoped LiNi0.83Co0.12Mn0.05O2 (NCM83-NA) can improve the structural stability and inhibit the release of lattice oxygen. It is found that the introduction of Al and Nb enlarges the interlayer spacing, and Nb ions induce the formation of radially oriented primary particles, which facilitate faster lithium-ion diffusion kinetics. XRD and XPS indicate that Al and Nb codoping reduces Li+/Ni2+ cation mixing, Ni3+ with Jahn-Teller activity, and irreversible phase transition and increases the lattice oxygen content on surface. These endow materials with more stable structures and fewer surface side reactions. Consequently, NCM83-NA exhibits remarkable capacity retention (95.10% for 100 cycles at 1C), along with a notably enhanced rate capability, achieving 145.0 mA h g(-1) at 5C. This work provides a hopeful approach for developing cathode materials with high performance.