Effect of dual local structures of amorphous Fe-Si films on the performance of anode of lithium-ion batteries

doi:10.1016/j.matchemphys.2020.122666

	Effect of dual local structures of amorphous Fe-Si films on the performance of anode of lithium-ion batteries
	Li, Xiaona 1; Zheng, Yuehong2 ; Li, Zhumin 1; Liu, Yubo 1; Huang, Hao 3; Wang, Qing 3; Dong, Chuang 1
	2020-03
Source Publication	MATERIALS CHEMISTRY AND PHYSICS
ISSN	0254-0584
Volume	243
Abstract	Amorphous silicon is a very promising anode material for lithium-ion batteries, but the poor cycle performance owing to volume expansion must be improved before application. In the present study, a series of amorphous FexSi100-x films with different local structures were prepared by magnetron sputtering system. The local structures of the films can be described using the cluster-plus-glue-atom model. For x = 5.3-14.0 at.%, the principal cluster is [Si-Si-4], for x = 24.2-46.8 at.%, the principal cluster is [Fe-Si8Fe2], especially for x = 19.1 at. %, the film has both clusters. The films on copper foil substrates were tested as the anode electrode material of lithium-ion batteries. The results show that the cycling stability of the thin film electrode increases with increasing Fe content, but the specific capacity decreases. The impedance of the films also shows two completely different trends with the composition, which further confirms that these Fe-Si amorphous films have different local structures. Especially for the Fe19.1Si80.9 film, the charge transfer between the two electrolyte/electrode interfaces has the two smallest impedances, indicating that the film has the highest charge transfer efficiency.
Keyword	Amorphous film Local structure Anode material
DOI	10.1016/j.matchemphys.2020.122666
Indexed By	SCI
Language	英语
Funding Project	Natural Science Foundation of Liaoning Province, China[20170540178] ; Fundamental Research Funds for the Central Universities[DUT17LAB09]
WOS Research Area	Materials Science
WOS Subject	Materials Science, Multidisciplinary
WOS ID	WOS:000523631300097
Publisher	ELSEVIER SCIENCE SA
Document Type	期刊论文
Identifier	http://ir.lut.edu.cn/handle/2XXMBERH/76188
Collection	省部共建有色金属先进加工与再利用国家重点实验室
Corresponding Author	Li, Xiaona; Huang, Hao
Affiliation	1.Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Dalian 116024, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 3.Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China
Recommended Citation GB/T 7714	Li, Xiaona,Zheng, Yuehong,Li, Zhumin,et al. Effect of dual local structures of amorphous Fe-Si films on the performance of anode of lithium-ion batteries[J]. MATERIALS CHEMISTRY AND PHYSICS,2020,243.
APA	Li, Xiaona.,Zheng, Yuehong.,Li, Zhumin.,Liu, Yubo.,Huang, Hao.,...&Dong, Chuang.(2020).Effect of dual local structures of amorphous Fe-Si films on the performance of anode of lithium-ion batteries.MATERIALS CHEMISTRY AND PHYSICS,243.
MLA	Li, Xiaona,et al."Effect of dual local structures of amorphous Fe-Si films on the performance of anode of lithium-ion batteries".MATERIALS CHEMISTRY AND PHYSICS 243(2020).

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