Insights Into the Interfacial Degradation of High-Voltage All-Solid-State Lithium Batteries

被引：0

作者：

Jiawen Li

Yuchen Ji

Haoran Song

Shiming Chen

Shouxiang Ding

Bingkai Zhang

Luyi Yang

Yongli Song

Feng Pan

机构：

[1] Peking University Shenzhen Graduate School,School of Advanced Material

[2] Guangdong University of Technology,Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry

来源：

Nano-Micro Letters | 2022年 / 14卷

关键词：

Solid-state battery; Poly(ethylene oxide); Surface modification; Interface stability; High-voltage cathode;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The cycle performance of poly(ethylene oxide) (PEO)-based all-solid-state lithium batteries with LiCoO2 cathode was greatly improved via coating LiCoO2 with high-voltage stable Li3AlF6.At the upper cutoff voltage of 4.2 V, the poor electrochemical performance is mainly originated from the structure collapse of LiCoO2 at the surface instead of the decomposition of PEO.When the voltage reaches 4.5 V or even higher potentials, the intensive electrochemical decomposition of PEO-based solid polymer electrolyte accelerated interfacial degradation.

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