期刊
NANO LETTERS
卷 16, 期 12, 页码 7394-7401出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b02926
关键词
Li-ion battery; Si anode; X-ray reflectivity; in situ; solid electrolyte interphase
类别
资金
- Department of Energy, Laboratory Directed Research and Development [DE-AC02-76SF00515]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
Surface sensitive X-ray reflectivity (XRR) measurements were performed to investigate the electro-chemical lithiation of a native oxide terminated single crystalline silicon (100) electrode in real time during the first galvanostatic discharge cycle. This allows us to gain nanoscale, mechanistic insight into the lithiation of Si and the formation of the solid electrolyte interphase (SEI). We describe an electrochemistry cell specifically designed for in situ XRR studies and have determined the evolution of the electron density profile of the lithiated Si layer (LixSi) and the SEI layer with subnanometer resolution. We propose a three stage lithiation mechanism with a reaction limited, layer-by layer lithiation of the Si at the LixSi/Si interface.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据