Revealing interfacial failure mechanism of silicon based all solid state batteries via cryogenic electron microscopy

Jingming Yao, Zhixuan Yu, Jun Ma, Zhangran Ye, Congcong Du, Jun Zhao, Jingzhao Chen, Hongjun Ye, Qiushi Dai, Hui Li, Yong Su, Jitong Yan, Dingding Zhu, Zaifa Wang, Xuedong Zhang, Zhaoyu Rong, Qiang Yu, Ziang Guo, Hailong Qiu, Zhenyu Wang, Lingyun Zhu, Yongfu Tang () and Jianyu Huang ()
Additional contact information
Jingming Yao: Yanshan University
Zhixuan Yu: Yanshan University
Jun Ma: Yanshan University
Zhangran Ye: Yanshan University
Congcong Du: Yanshan University
Jun Zhao: Yanshan University
Jingzhao Chen: Yanshan University
Hongjun Ye: Yanshan University
Qiushi Dai: Yanshan University
Hui Li: Yanshan University
Yong Su: Xiangtan University
Jitong Yan: Yanshan University
Dingding Zhu: Xiangtan University
Zaifa Wang: Yanshan University
Xuedong Zhang: Xiangtan University
Zhaoyu Rong: Yanshan University
Qiang Yu: Xiangtan University
Ziang Guo: Yanshan University
Hailong Qiu: Yanshan University
Zhenyu Wang: Guilin Electrical Equipment Scientific Research Institute Co. Ltd
Lingyun Zhu: Anhui University
Yongfu Tang: Yanshan University
Jianyu Huang: Yanshan University

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract Interfaces are the critical components of all-solid-state batteries, and it is generally believed that high interfacial impedance is the major culprits of battery failure. In this study, the interface impedance has been found not to be a major issue in the batteries comprising Si negative electrode, Li10GeP2S12 and Li10Si0.3PS6.7Cl1.8 electrolytes and LiNi0.8Mn0.1Co0.1O2 positive electrode. Instead, it is the sustainable interfacial reaction that depletes the active lithium source, causing continuous capacity decay. The interphase layer at the Si/Li10Si0.3PS6.7Cl1.8 interface comprising nanocrystalline Li2S dispersed in an amorphous matrix is thin (with a thickness

Date: 2025
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DOI: 10.1038/s41467-025-64697-0

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