阳极
材料科学
压力(语言学)
堆栈(抽象数据类型)
锡
电极
电解质
合金
锂(药物)
阴极
复合数
电化学
复合材料
冶金
工程类
电气工程
化学
计算机科学
医学
内分泌学
哲学
物理化学
程序设计语言
语言学
作者
Sang Yun Han,Chanhee Lee,John A. Lewis,David Yeh,Yuhgene Liu,Hyun‐Wook Lee,Matthew T. McDowell
出处
期刊:Joule
[Elsevier]
日期:2021-09-01
卷期号:5 (9): 2450-2465
被引量:83
标识
DOI:10.1016/j.joule.2021.07.002
摘要
Alloy anodes hold promise for enabling high-energy solid-state batteries, but their substantial volume changes during charge/discharge can cause structural and mechanical degradation within the all-solid-state environment. It is therefore critical to understand how material evolution and mechanical stress within alloy-anode-based solid-state batteries are related. Here, we investigate stress (stack pressure) evolution within batteries with composite anodes that contain active materials such as silicon, tin, and antimony, along with an argyrodite-type electrolyte and LiNi0.33Mn0.33Co0.33O2 cathodes. We measure megapascal-level stress changes that are dependent on the amount of lithium transferred, and we find that stress signatures and hysteresis during charge/discharge are affected by the electrode structure and the active material. We furthermore show that these composite-alloy anodes enable stable long-term cycling with associated cyclic-stress changes. These findings provide new understanding of the relationship between electrochemistry and mechanics within solid-state batteries, which is important because megapascal-level stack pressures are generally necessary for optimal performance.
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