Relaxation Analysis of Li-Co-O Cathode Material for Li Ion Secondary Batteries

We electrochemically extracted or inserted lithium from or to LiCoO2 and investigated the relaxation process by means of X-ray diffraction measurement and the Rietveld analysis. After either lithium extraction or insertion, the mole fraction of the Li-rich phase increased and that of the Li-lean pha...

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Bibliographic Details
Published inECS electrochemistry letters Vol. 2; no. 7; pp. A72 - A74
Main Authors Seo, Im Sul, Nagashima, Shota, Takai, Shigeomi, Yao, Takeshi
Format Journal Article
LanguageEnglish
Published The Electrochemical Society 09.05.2013
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Summary:We electrochemically extracted or inserted lithium from or to LiCoO2 and investigated the relaxation process by means of X-ray diffraction measurement and the Rietveld analysis. After either lithium extraction or insertion, the mole fraction of the Li-rich phase increased and that of the Li-lean phase decreased with the relaxation time. It is considered that the Li-lean phase was preferably produced even having excess lithium to promote lithium diffusion at the lithium extraction/insertion process, then the Li-lean phase separated into the Li-rich phase and the Li-lean phase with no excess lithium at the relaxation time.
Bibliography:001308EEL
ISSN:2162-8726
2162-8734
DOI:10.1149/2.001308eel