New insight into the solid electrolyte interphase with use of a focused ion beam

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	New insight into the solid electrolyte interphase with use of a focused ion beam
	H. L. Zhang; F. Li; C. Liu; J. Tan; H. M. Cheng
	2005
发表期刊	Journal of Physical Chemistry B
ISSN	1520-6106
卷号	109 期号:47 页码:22205-22211
摘要	The formation and evolution of the solid electrolyte interphase (SEI) film on the surface of natural graphite spheres in the electrolyte of 1 M LiPF6 in ethylene carbonate (EC) and dimethyl carbonate (DMC) (volume ratio 1: 1) were investigated with use of focused ion beam (FIB) technology. Secondary electron FIB images clearly show the surface and cross-section morphology of the SEI film. The composition variation along the surface and cross section of the SEI film was also explored by the elemental line scan analysis (ELSA). The initial SEI film with an apparent thickness range of similar to 450 to similar to 980 nm is rough in morphology and nonuniform in composition, and contains small splits. After certain electrochemical cycles, the thickened SEI film displays microscale holes and obvious cracks on the surface, and the content of organic compounds increases. In addition, the concept of "internal SEI film" is first proposed based on the characterization of the cross section of the natural graphite spheres with the aid of FIB. Finally, the capacity fading mechanisms of the natural graphite spheres corresponding to different electrochemical stages are discussed.
部门归属	chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china.;cheng, hm (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;cheng@imr.ac.cn
关键词	Graphite Negative Electrode Surface-film Formation Lithium Batteries In-situ Li Electrodes Chemistry Carbonate Performance Morphology Interface
URL	查看原文
WOS记录号	WOS:000233684500019
引用统计	被引频次：88[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35208
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. L. Zhang,F. Li,C. Liu,et al. New insight into the solid electrolyte interphase with use of a focused ion beam[J]. Journal of Physical Chemistry B,2005,109(47):22205-22211.
APA	H. L. Zhang,F. Li,C. Liu,J. Tan,&H. M. Cheng.(2005).New insight into the solid electrolyte interphase with use of a focused ion beam.Journal of Physical Chemistry B,109(47),22205-22211.
MLA	H. L. Zhang,et al."New insight into the solid electrolyte interphase with use of a focused ion beam".Journal of Physical Chemistry B 109.47(2005):22205-22211.