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Open AccessArticle

Non-Destructive Analysis of Degradation Mechanisms in Cycle-Aged Graphite/LiCoO2 Batteries

School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
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Energies 2014, 7(10), 6282-6305; https://doi.org/10.3390/en7106282
Received: 25 July 2014 / Revised: 13 September 2014 / Accepted: 23 September 2014 / Published: 29 September 2014
(This article belongs to the Special Issue Electrochemical Energy Storage—Battery and Capacitor)
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/LiCoO2 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. View Full-Text
Keywords: degradation mechanisms; cycle life; multi-physics model; lithium-ion battery degradation mechanisms; cycle life; multi-physics model; lithium-ion battery
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Zhang, L.; Wang, L.; Lyu, C.; Li, J.; Zheng, J. Non-Destructive Analysis of Degradation Mechanisms in Cycle-Aged Graphite/LiCoO2 Batteries. Energies 2014, 7, 6282-6305.

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