石墨
插层(化学)
复合数
阳极
材料科学
金属
碳纤维
集电器
沉积(地质)
化学工程
复合材料
无机化学
冶金
工程类
化学
电极
物理化学
电解质
生物
古生物学
沉积物
作者
Dominic Spencer Jolly,Varnika Agarwal,Christopher Doerrer,Bingkun Hu,Shengming Zhang,Dominic L. R. Melvin,Hui Gao,Xiangwen Gao,Paul Adamson,Oxana V. Magdysyuk,Patrick S. Grant,Robert A. House,Peter G. Bruce
出处
期刊:Joule
[Elsevier]
日期:2023-02-24
卷期号:7 (3): 503-514
被引量:41
标识
DOI:10.1016/j.joule.2023.02.001
摘要
Ag-carbon composite interlayers have been reported to enable Li-free (anodeless) cycling of solid-state batteries. Here, we report structural changes in the Ag-graphite interlayer, showing that on charge, Li intercalates electrochemically into graphite, subsequently reacting chemically with Ag to form Li-Ag alloys. Discharge is not the reverse of charge but rather passes through Li-deficient Li-Ag phases. At higher charging rates, Li intercalation into graphite outpaces the chemical reactions with Ag, delaying the formation of the Li-Ag phases and resulting in more Li metal deposition at the current collector. At and above 2.5 mA·cm−2, Li dendrites are not suppressed. Ag nanoparticles do not suppress dendrites more effectively than does an interlayer of graphite alone. Instead, Ag in the carbon interlayer results in more homogeneous Li and Li-Ag formation on the current collector during charge.
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