Rate-dependent deformation of amorphous sulfide glass electrolytes for solid-state batteries

被引:28
|
作者
Athanasiou, Christos E. [1 ]
Liu, Xing [1 ]
Jin, Mok Yun [1 ]
Nimon, Eugene [2 ]
Visco, Steve [2 ]
Lee, Cholho [3 ]
Park, Myounggu [3 ]
Yun, Junnyeong [3 ]
Padture, Nitin P. [1 ]
Gao, Huajian [1 ,4 ,5 ]
Sheldon, Brian W. [1 ]
机构
[1] Brown Univ, Sch Engn, Providence, RI 02912 USA
[2] SK Innovat, Inst Environm Sci & Technol, Daejeon 34124, South Korea
[3] Nanyang Technol Univ, Coll Engn, Sch Mech & Aerosp Engn, Singapore 639798, Singapore
[4] ASTAR, Inst High Performance Comp, Singapore 138632, Singapore
[5] Polyplus Battery Co, Berkeley, CA 94710 USA
来源
CELL REPORTS PHYSICAL SCIENCE | 2022年 / 3卷 / 04期
基金
美国国家科学基金会;
关键词
LITHIUM; ELECTRODEPOSITION; NANOINDENTATION; CONDUCTIVITY; PENETRATION; TEMPERATURE; TOUGHNESS; LI;
D O I
10.1016/j.xcrp.2022.100845
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Sulfide glasses are emerging as potential electrolytes for solid-state batteries. The mechanical behavior of these materials can significantly impact cell performance, and it is thus imperative to understand their deformation and fracture mechanisms. Previous work mainly reports properties obtained under quasi-static loading conditions, but very little is known about deformation under dynamic conditions. The current investigation shows that the sulfide glass mechanical behavior is dominated by viscoplasticity, differing substantially from polycrystalline oxide and sulfide solid electrolytes. Finite element modeling indicates that the sulfide glass stiffness is high enough to maintain good contact with softer lithium metal electrodes under moderate stack pressures. The observed viscoplasticity also implies that battery operating conditions will play an important role in electro-chemo-mechanical processes that are associated with dendritic lithium penetration. In general, the rate-dependent mechanical behavior of the sulfide glass electrolytes documented here offers a new dimension for designing next -generation all-solid-state batteries.
引用
收藏
页数:18
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