Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/106088
Title: Effect of overcharge on entropy and enthalpy of lithium-ion batteries
Authors: Maher, Kenza
Yazami, Rachid
Issue Date: 2012
Source: Maher, K., & Yazami, R. (2013). Effect of overcharge on entropy and enthalpy of lithium-ion batteries. Electrochimica Acta, 101, 71-78.
Series/Report no.: Electrochimica acta
Abstract: We have investigated the evolution of the thermodynamics behaviour and of the crystal structure of electrodes materials of lithium-ion batteries based on graphite anode and lithium cobalt oxide (LCO) cathode after applying high voltage charging between 4.2 V and 4.9 V cut-off voltages (COV). We found the entropy and enthalpy profiles vary dramatically with the applied COV. These changes correlate well with the anode and the cathode crystal structure degradation as evidenced by post-mortem X-ray diffractometry and Raman scattering spectrometry. Our finding is thermodynamics measurements can be used as a new and non-destructive investigation tool to characterize the degradation level of electrode materials and consequently assess the cell's state of health (SOH).
URI: https://hdl.handle.net/10356/106088
http://hdl.handle.net/10220/10842
ISSN: 0013-4686
DOI: 10.1016/j.electacta.2012.11.057
Rights: © 2012 Elsevier Ltd.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ERI@N Journal Articles

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