材料科学
无定形固体
锂(药物)
电极
电化学
电解质
锂离子电池
薄膜
弹性模量
化学工程
复合材料
电池(电)
分析化学(期刊)
纳米技术
结晶学
化学
物理化学
热力学
医学
功率(物理)
物理
工程类
内分泌学
色谱法
作者
Ridwan P. Putra,Kyosuke Matsushita,T. Ohnishi,Toshio Masuda
标识
DOI:10.1021/acs.jpclett.3c03012
摘要
An operando bimodal atomic force microscopy system was constructed to perform nanomechanical mapping of an amorphous Si thin film electrode deposited on a Li6.6La3Zr1.6Ta0.4O12 solid electrolyte sheet during electrochemical lithiation/delithiation. The evolution of Young’s modulus maps of the Si electrode was successfully tracked as a function of apparent Li content x in lithium silicide (LixSi) simultaneously with real-time surface topography observation. At the initial stage of lithiation, the average modulus steeply decreased due to the generation of LixSi from intrinsic Si, followed by a moderate modulus reduction until the electrode capacity reached 3300 mAh g–1 (Li content x = 3.46). In the following delithiation, the gradual recovery of the average modulus of LixSi was observed up to 1467 mAh g–1 (Li content x = 1.54) at which delithiation stopped due to the significant volume change induced by phase transformation of LixSi.
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