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	An electrochemical impedance spectroscopic study of the electronic and ionic transport properties of LiCoO2 cathode
	Zhuang QuanChao ; Zhuang QC(庄全超) ; Xu JinMei ; Fan Xiao Yong ; Fan XY(樊小勇) ; Dong QuanFeng ; Dong QF(董全峰) ; Jiang YanXia ; Jiang YX(姜艳霞) ; Huang Ling ; Huang L(黄令) ; Sun ShiGang ; Sun SG(孙世刚)
	2007
关键词	Li-ion batteries LiCoO2 EIS SEI film electronic conductivity
英文摘要	The storage behavior and process of the first delithiation-lithiation of LiCoO2 cathode were investigated by electrochemical impedance spectroscopy (EIS). The electronic and ionic transport properties of LiCoO2 cathode along with variation of electrode potential were obtained in 1 mol.L-1 LiPF6-EC: DMC: DEC electrolyte solution. It was found that after 9 h storage of the LiCoO2 cathode in electrolyte solutions, a new arc appears in the medium frequency range in Nyquist plots of EIS, which increases with increasing the storage time. In the charge/discharge processes, the diameter of the new arc is reversibly changed with electrode potential. Such variation coincides well with the electrode potential dependence of electronic conductivity of the LiCoO2.. Thus this new EIS feature is attributed to the change of electronic conductivity of LixCoO2 during storage of the LiCoO2 cathode in electrolyte solutions, as well as in processes of intercalation-deintercalationtion of lithium ions. It has been revealed that the reversible increase and decrease of the resistance of SEI film in charge-discharge processes can be also ascribed to the variation of electronic conductance of active materials of the LiCoO2 cathode.
语种	英语
出版者	SCIENCE CHINA PRESS
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1007/s11434-007-0169-1]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Zhuang QuanChao,Zhuang QC,Xu JinMei,et al. An electrochemical impedance spectroscopic study of the electronic and ionic transport properties of LiCoO2 cathode[J],2007.
APA	Zhuang QuanChao.,庄全超.,Xu JinMei.,Fan Xiao Yong.,樊小勇.,...&孙世刚.(2007).An electrochemical impedance spectroscopic study of the electronic and ionic transport properties of LiCoO2 cathode..
MLA	Zhuang QuanChao,et al."An electrochemical impedance spectroscopic study of the electronic and ionic transport properties of LiCoO2 cathode".(2007).

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