期刊
JOURNAL OF POWER SOURCES
卷 146, 期 1-2, 页码 360-364出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2005.03.011
关键词
non-aqueous electrolyte; LiCoO2 thin-film; in situ FT-IR; rechargeable lithium batteries
LiCoO2 thin-film electrodes were prepared by rf-sputtering and sol-gel methods. The prepared thin films contained different amounts of Co3O4 as an impurity depending on the preparation conditions. In situ FT-IR spectroscopic analyses on electrochemical oxidation of ethylene carbonate (EC) and diethyl carbonate (DEC) containing LiClO4 on the LiCoO2 thin-film electrodes were carried out. The electrochemical oxidations of EC and DEC occurred even at 3.8 V versus Li/Li+ on the fresh LiCoO2. The solvents EC and DEC were oxidized to some compounds with carboxylic groups. In situ FF-IR spectra obtained for the LiCoO2 thin films prepared by different methods were compared each other. (c) 2005 Elsevier B.V. All rights reserved.
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