材料科学
电极
自行车
硅
锂(药物)
薄膜
离子
光电子学
基质(水族馆)
分析化学(期刊)
纳米技术
化学
物理化学
医学
海洋学
考古
有机化学
色谱法
内分泌学
地质学
历史
作者
Douglas S.M. Iaboni,M. N. Obrovac
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2015-11-19
卷期号:163 (2): A255-A261
被引量:113
摘要
The conditions for Li15Si4 formation in Si thin film negative electrodes was studied during charge and discharge cycling in lithium cells. It was found that Li15Si4 formation can be suppressed during cycling of Si thin films by stress induced from the presence of the substrate. Furthermore, Li15Si4 formation was found to be coincidental with capacity fade and delamination of the Si film from the current collector. These results deepen the understanding of the cycling of Si thin films. Moreover, they have profound implications for Si alloy negative electrodes for Li-ion batteries, as the presence of Li15Si4 during cycling can be used as a sensitive indicator for weakly bound Si regions.
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