In-situ study of surface structure evolution of silicon anodes by electrochemical atomic force microscopy

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2018专题

	In-situ study of surface structure evolution of silicon anodes by electrochemical atomic force microscopy
	Wang, Shuwei; Shen, Cai; Wang, Deyu; Cheong, Ling-Zhi; Huang, Shiqiang
刊名	APPLIED SURFACE SCIENCE
	2018
卷号	452 页码:67-74
关键词	Solid-electrolyte Interphase Lithium-ion Batteries Fluoroethylene Carbonate Thin-films Performance Li Lnterphase Lithiation Afm Spectroscopy
英文摘要	Silicon is one of the most promising anode materials for lithium ion batteries because of its extremely high theoretical capacity. However, silicon suffers from mechanical degradation caused by huge volume change and unstable solid electrolyte interphase (SEI) layers. Herein, we report an in situ electrochemical atomic force microscopy (EC-AFM) method to directly visualize the surface topography and analyze Young's modulus of micron-sized (Micron-Si) and nano-sized (Nano-Si) silicon electrodes. Our results show Micron-Si electrodes experienced volume expansion and contraction process which resulted in continuous growth of a thick but soft SEI layer on the surface. In contrast, Nano-Si electrodes demonstrate a thin SEI layer due to absence of volume expansion and contraction process. Young's modulus value shows that the SEI film of Nano-Si electrodes is harder than that of the Micron-Si electrodes. Ex situ XPS analysis reveals that Nano-Si electrodes are composed of mainly inorganic components particularly LiF and carbonate-like species which might contribute to the increased hardness. Results from present study may be helpful to build better SEI layer with good Young's modulus to buffer volume expansion of Si. (C) 2018 Published by Elsevier B.V.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/17202]
专题	2018专题
推荐引用方式 GB/T 7714	Wang, Shuwei,Shen, Cai,Wang, Deyu,et al. In-situ study of surface structure evolution of silicon anodes by electrochemical atomic force microscopy[J]. APPLIED SURFACE SCIENCE,2018,452:67-74.
APA	Wang, Shuwei,Shen, Cai,Wang, Deyu,Cheong, Ling-Zhi,&Huang, Shiqiang.(2018).In-situ study of surface structure evolution of silicon anodes by electrochemical atomic force microscopy.APPLIED SURFACE SCIENCE,452,67-74.
MLA	Wang, Shuwei,et al."In-situ study of surface structure evolution of silicon anodes by electrochemical atomic force microscopy".APPLIED SURFACE SCIENCE 452(2018):67-74.