阴极
材料科学
兴奋剂
电化学
离子
热稳定性
化学工程
晶体结构
单晶
纳米技术
分析化学(期刊)
电极
光电子学
结晶学
化学
物理化学
工程类
色谱法
有机化学
作者
Longwei Liang,Xiaoying Li,Maoshui Su,Lixian Wang,Jinfeng Sun,Yang Liu,Linrui Hou,Changzhou Yuan
标识
DOI:10.1002/anie.202216155
摘要
High voltage can cost-effectively boost energy density of Ni-rich cathodes based Li-ion batteries (LIBs), but compromises their mechanical, electrochemical and thermal-driven stability. Herein, a collaborative strategy (i.e., small single-crystal design and hetero-atom doping) is devised to construct a chemomechanically reliable small single-crystal Mo-doped LiNi0.6 Co0.2 Mn0.2 O2 (SS-MN6) operating stably under high voltage (≥4.5 V vs. Li/Li+ ). The substantially reduced particle size combined with Mo6+ doping absorbs accumulated localized stress to eradicate cracks formation, subdues the surface side reactions and lattice oxygen missing meanwhile, and improves thermal tolerance at highly delithiated state. Consequently, the SS-MN6 based pouch cells are endowed with striking deep cycling stability and wide-temperature-tolerance capability. The contribution here provides a promising way to construct advanced cathodes with superb chemomechanical stability for next-generation LIBs.
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