Journal
JOURNAL OF POWER SOURCES
Volume 119, Issue -, Pages 918-923Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0378-7753(03)00227-1
Keywords
LiCoO2; temperature effect; open-circuit voltage; self-discharge; activation energy; spinel
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The time dependence of the open-circuit voltage (OCV) and the capacity loss in Li/Li1-yCoO2 half-cells during high temperature aging were measured experimentally, and tentatively simulated with simple kinetics equations involving Li-ion diffusion and a phase transition, respectively. The respective activation energies were determined. The capacity loss was found to have a reversible and irreversible component. The latter is discussed in contest of recent observation of an irreversible hexagonal-to-spine phase transition. (C) 2003 Published by Elsevier Science B.V.
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