曲折
电解质
阴极
材料科学
硫化物
复合数
快离子导体
锂(药物)
能量密度
化学工程
冶金
复合材料
化学
工程物理
电极
多孔性
物理化学
工程类
医学
内分泌学
作者
Alyssa M. Stavola,Xiao Sun,Dominick P. Guida,Andrea M. Bruck,Daxian Cao,John Okasinski,Andrew Chihpin Chuang,Hongli Zhu,Joshua W. Gallaway
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2023-02-02
卷期号:8 (2): 1273-1280
被引量:1
标识
DOI:10.1021/acsenergylett.2c02699
摘要
Achieving high energy density in all-solid-state lithium batteries will require the design of thick cathodes, and these will need to operate reversibly under normal use conditions. We use high-energy depth-profiling X-ray diffraction to measure the localized lithium content of Li1–xNi1/3Mn1/3Co1/3O2 (NMC111) through the thickness of 110 μm thick composite cathodes. The composite cathodes consisted of NMC111 of varying mass loadings mixed with argyrodite solid electrolyte Li6PS5Cl (LPSC). During cycling at C/10, substantial lithiation gradients developed, and varying the NMC111 loading altered the nature of these gradients. Microstructural analysis and cathode modeling showed this was due to high tortuosities in the cathodes. This was particularly true in the solid electrolyte phase, which experienced a marked increase in tortuosity factor during the initial charge. Our results demonstrate that current distributions are observed in sulfide-based composites and that these will be an important consideration for practical design of all-solid-state batteries.
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