Influence of overcharge and over-discharge on the impedance response of LiCoO2|C batteries

JOURNAL OF POWER SOURCES

卷:270

Article

Erol, Salim¹  Orazem, Mark E.¹  Muller, Richard P.² 

[1] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA

[2] Sandia Natl Labs, Albuquerque, NM 87185 USA

关键词: Overcharge;    Over-discharge;    Capacity loss;    Self-charge;    Self-discharge;    Impedance spectroscopy;   

DOI  :  10.1016/j.jpowsour.2014.07.038

来源: Elsevier

【 摘 要 】

This paper provides the results of impedance measurements on commercially available LiCoO2 vertical bar C coin-type cells. The impedance response was shown to be extremely sensitive to state-of-charge, overcharge, and over-discharge. Interestingly, the impedance showed a persistent change to the electrochemical characteristics of a coin cell subject to overcharge; whereas, the electrochemical characteristics returned to normal for a coin cell subject to over-discharge. A measurement model analysis was used to show the reversibility of the impedance behavior of an over-discharged cell and the irreversibility of the impedance response of an overcharged cell. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free