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Mitigating Surface Irreversible Layer-To-Spinel Phase Transition for Stable and Ultrahigh-Capacity LiCoO2 Cathodes
Haocong Yi1, Wenguang Zhao1, Yutong Lin2
1School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
Abstract:
Currently, the surface structure collapse issues have long hindered the utilization of ultrahigh-capacity LiCoO2 (LCO) cathodes. Herein, a dual-optimized LCO (D-LCO) is proposed with a surface rocksalt (RS) phase (10 nm) and a subsurface layered phase reinforced by Al/F doping (>50 nm). Unlike solely surface modifications, subsurface Al/F doping drastically suppresses lattice On- (0
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