Non-Destructive Analysis of Degradation Mechanisms in Cycle-Aged Graphite/LiCoO 2 Batteries

Liqiang Zhang, Lixin Wang, Chao Lyu, Junfu Li and Jun Zheng
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Liqiang Zhang: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Lixin Wang: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Chao Lyu: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Junfu Li: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Jun Zheng: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

Energies, 2014, vol. 7, issue 10, 1-24

Abstract: Non-destructive analysis of degradation mechanisms can be very beneficial for the prognostics and health management (PHM) study of lithium-ion batteries. In this paper, a type of graphite/LiCoO 2 battery was cycle aged at high ambient temperature, then 25 parameters of the multi-physics model were identified. Nine key parameters degraded with the cycle life, and they were treated as indicators of battery degradation. Accordingly, the degradation mechanism was discussed by using the multi-physics model and key parameters, and the reasons for capacity fade and the internal resistance increase were analyzed in detail. All evidence indicates that the formation reaction of the solid electrolyte interface (SEI) film is the main cause of battery degradation at high ambient temperature.

Keywords: degradation mechanisms; cycle life; multi-physics model; lithium-ion battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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