文献类型：期刊文献

英文题名：Highly-Dispersed Single-Crystalline Ni-Rich Cathodes with Low Li/O Loss for High-Power and Long-Life Li-Ion Batteries

作者：Yu, Haifeng[1,2];Han, Qiang[1,2];Chen, Long[1];Chen, Ling[2];Jiang, Hao[1];Li, Chunzhong[1,2]

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

年份：2024

卷号：34

期号：51

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20243516934411);WOS:【SCI-EXPANDED(收录号:WOS:001297236300001)】；

基金：This work was supported by the National Natural Science Foundation of China (U22A20429 and 22308103), the Postdoctoral Fellowship Program of CPSF (GZB20230214), China Postdoctoral Science Foundation (2023M731083), Shanghai Pilot Program for Basic Research (22TQ1400100-13) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Li-ion batteries; Ni-rich cathodes; power density; single-crystalline

摘要：Highly-dispersed single-crystalline Ni-rich cathodes with low Li/O loss are the key for high-power Li-ion batteries, but it is still a big challenge because an additional 60-110 degrees C higher synthesis temperature is required in comparison with the polycrystalline counterparts. Herein, a highly-ordered and monodisperse single-crystalline LiNi0.83Co0.12Mn0.05O2 (NCM83) cathode with an average size of 3.24 mu m is reported by a Sr/Nb synergically controlling the grain surface energy strategy based on the Vegard's slopes of various ions. The solid-phase lithiation temperature is reduced by approximate to 80 degrees C, greatly reducing Li/Ni disorder and oxygen vacancies with rapid Li-ion diffusion kinetics and high structure stability. The introduced Sr/Nb ions remarkably increase the electron cloud density near the Fermi level, while alleviating the H2-H3 phase transition with reduced lattice shrinkage. The as-prepared single-crystalline NCM83 cathode exhibits obvious increased capacity retention of 60% at 10C (vs. 0.1C) in coin-type half-cells and 89% after cycling 1000 times at 0.5C in pouch-type full-cells. The work sheds light on the low-temperature synthesis of monodisperse and uniform single-crystalline Ni-rich cathodes for high-power and long-life Li-ion batteries. The highly-ordered and monodisperse single-crystalline LiNi0.83Co0.12Mn0.05O2 cathodes are synthesized by a Sr/Nb synergically controlling the grain surface energy based on the Vegard's slopes and density functional theory (DFT) calculations of various ions. The lithiation temperature is reduced by approximate to 80 degrees C, greatly reducing Li/Ni disorder and oxygen vacancies with rapid Li-ion diffusion kinetics and high structure stability. image