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	Capacity degradation of commercial LiFePO4 cell at elevated temperature
	Wenpeng Cao; Juan Li; Zhengbin Wu
	2015
会议名称	The 2015 International Conference on Energy, Environment and Materials Science
会议地点	中国广州
英文摘要	The cyclelife test of commercial 22650-type lithium iron phosphate/graphite batteries were performed at room and elevated temperatures in order to deduce the aging mechanisms for capacity fading. A number of non-destructive electrochemical techniques such as capacity recovery test with small current, electrochemical impedance spectroscopy, differential-voltage and differential- capacity analysis, and destructive analysis of electrode are discussed in details. Compared with the cell cycled at 55oC, the lower 25oC reached its end of life faster, and a higher discharge current of 3C should be responsible for the power loss of cylinder batteries and difference of capacity fading between 25 and 55oC because a great of proportion of capacities can be regained through a small current. The lithium loss mechanism was considered to be the dominated reason for all degradation of batteries and persistent damage and regeneration of SEI layer was the leading cause of active lithium loss.
收录类别	EI
语种	英语
内容类型	会议论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/6476]
专题	深圳先进技术研究院_其他
作者单位	2015
推荐引用方式 GB/T 7714	Wenpeng Cao,Juan Li,Zhengbin Wu. Capacity degradation of commercial LiFePO4 cell at elevated temperature[C]. 见:The 2015 International Conference on Energy, Environment and Materials Science. 中国广州.

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