Effect of dual local structures of amorphous Fe-Si films on the performance of anode of lithium-ion batteries
Li, Xiaona1; Zheng, Yuehong2; Li, Zhumin1; Liu, Yubo1; Huang, Hao3; Wang, Qing3; Dong, Chuang1
2020-03
Source PublicationMATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
Volume243
AbstractAmorphous 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.
KeywordAmorphous film Local structure Anode material
DOI10.1016/j.matchemphys.2020.122666
Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of Liaoning Province, China[20170540178] ; Fundamental Research Funds for the Central Universities[DUT17LAB09]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000523631300097
PublisherELSEVIER SCIENCE SA
Document Type期刊论文
Identifierhttp://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 AuthorLi, Xiaona; Huang, Hao
Affiliation1.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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