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	Electrochemical behavior of copper current collector in imidazolium-based ionic liquid electrolytes
	Peng, Chengxin（ Tongji Univ, Inst Adv Mat & Nano Biomed） ; Yang, Li（ Shanghai Jiao Tong Univ, Sch Chem & Chem Technol） ; Fang, Shaohua（ Shanghai Jiao Tong Univ, Sch Chem & Chem Technol） ; Wang, Jixian（ Shanghai Jiao Tong Univ, Sch Chem & Chem Technol） ; Zhang, Zhengxi（ Shanghai Jiao Tong Univ, Sch Chem & Chem Technol） ; Tachibana, Kazuhiro（ Yamagata Univ, Dept Chem & Chem Engn） ; Yang, Yong ; Yang Y(杨勇) ; Zhao, Shiyong（Zhangjiagang Green Battery Mat Res Inst Co Ltd）
	2009-12
关键词	Lithium ion battery Copper current collector Corrosion Ionic liquid Electrolytes
英文摘要	The electrochemical behaviors of copper current collector in 1-alkyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl] imide ionic liquid electrolytes were investigated and compared with that in ethylene carbonate/dimethyl carbonate solutions. Cyclic voltammetry results showed that large oxidation-reduction current of the copper foil appeared in ethylene carbonate/dimethyl carbonate solutions, while a much smaller current in the room temperature ionic liquid electrolytes decreased gradually, indicating that the copper foil was anodically stable. Further study by X-ray photoelectron spectroscopy analysis showed that an unstable product was composed mainly of the carbonate and carbonyl species on the surface of the copper foil after the electrochemical measurement in ethylene carbonate/dimethyl carbonate solutions, leading to the dissolution of the copper foil. While a better passivating film from the reduction of the anions in the room temperature ionic liquid electrolytes covered the surface of copper foil and protected the copper foil from being oxidized even in a higher potential. These results indicate that the use of room temperature ionic liquid electrolytes can improve the stability of copper current collector in the advanced lithium ion batteries.; National Grand Fundamental Research 973 Program of China [2006CB202600]; National High Technology Research and Development Plan of China [2007AA03Z222]
语种	英语
出版者	SPRINGER
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1007/s10800-009-0040-y]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Peng, Chengxin,Yang, Li,Fang, Shaohua,et al. Electrochemical behavior of copper current collector in imidazolium-based ionic liquid electrolytes[J],2009.
APA	Peng, Chengxin.,Yang, Li.,Fang, Shaohua.,Wang, Jixian.,Zhang, Zhengxi.,...&Zhao, Shiyong.(2009).Electrochemical behavior of copper current collector in imidazolium-based ionic liquid electrolytes..
MLA	Peng, Chengxin,et al."Electrochemical behavior of copper current collector in imidazolium-based ionic liquid electrolytes".(2009).

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