胡须
扫描电子显微镜
材料科学
络腮胡子
成核
枝晶(数学)
电解质
薄膜
纳米技术
复合材料
化学
电极
物理化学
几何学
数学
有机化学
作者
Chao Tang,Shen J. Dillon
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2016-01-01
卷期号:163 (8): A1660-A1665
被引量:51
摘要
The nucleation and growth of Li metal deposits and whiskers were studied using a novel in-situ scanning electron microscopy (SEM) platform. The experiments utilized a thin carbon film as a substrate for Li deposition. Rather than depositing primarily at the carbon-electrolyte interface, much of the Li deposits at the carbon-vacuum interface. This allows the effects of concentration polarization and electric field localization to be eliminated as primary mechanisms for whisker and dendrite growth. Instead, measurements performed as a function of vacuum pressure reveal that whisker growth is sensitive to vacuum level. It is proposed that whisker growth results from diffusional relaxation of compressive stress imposed by a thin surface oxide. Similar mechanisms may be extended to Li dendrite growth in solution where solid electrolyte interphase introduces a compressive stress.
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