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	Capacity fading of LiCr0.1Mn1.9O4/MPCF cells at elevated temperature
	Li, Jiangang ; He, Xiangming ; Fan, Maosong ; Wan, Chunrong ; Jiang, Changin ; Zhang, Shichao
	2010-05-10 ; 2010-05-10
关键词	LiCr0.1Mn1.9O4 capacity fading electrolyte decomposition elevated temperature Li-ion batteries LITHIUM-ION BATTERIES ELECTROCHEMICAL-BEHAVIOR ELECTROLYTE GRAPHITE SPINEL PERFORMANCE SURFACE LIMN2O4 MN Chemistry, Physical Electrochemistry Physics, Condensed Matter
中文摘要	Capacity fading of LiCr0.1Mn1.9O4 /MPCF (mesophase pitch-based carbon fiber) cells was investigated at elevated temperature (55 degrees C). The cells showed very fast capacity fading, keeping only 60% of capacity retention at the 100th cycle at 55 degrees C. The cycled electrodes and the electrolyte were analyzed using electrochemical test, inductively coupled plasma, and X-ray diffraction. Results of the analyses indicated that LiCr0.1Mn1.9O4 exhibited good effects on restraint of Mn dissolution and stabilization of structure at 55 degrees C. The cycled LiCr0.1Mn1.9O4 electrode and the cycled MPCF electrode presented good electrochemical performance again with fresh electrolyte. Therefore, it was proposed that the cycling fading of LiCr0.1Mn1.9O4/ MPCF cells was mainly caused by decomposition of electrolyte upon LiCr0.1Mn1.9O4 electrode during cycling. It was found that the decomposition of electrolyte led to the formation of a surface layer comprised of Li2CO3, LixPFy, CH3OCO2Li or (CH2OCO2Li)(2), polymeric ether etc. The formation of this film consumed active lithium ions, leading to fast capacity fading of LiCr0.1Mn1.9O4/MPCF cell at elevated temperature.
语种	英语 ; 英语
出版者	SPRINGER HEIDELBERG ; HEIDELBERG ; TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/23032]
专题	清华大学
推荐引用方式 GB/T 7714	Li, Jiangang,He, Xiangming,Fan, Maosong,et al. Capacity fading of LiCr0.1Mn1.9O4/MPCF cells at elevated temperature[J],2010, 2010.
APA	Li, Jiangang,He, Xiangming,Fan, Maosong,Wan, Chunrong,Jiang, Changin,&Zhang, Shichao.(2010).Capacity fading of LiCr0.1Mn1.9O4/MPCF cells at elevated temperature..
MLA	Li, Jiangang,et al."Capacity fading of LiCr0.1Mn1.9O4/MPCF cells at elevated temperature".(2010).

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