期刊
ELECTROCHEMICAL AND SOLID STATE LETTERS
卷 6, 期 9, 页码 A202-A206出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.1594413
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Photoelectron spectroscopy (PES) was used for depth-profile characterization of the interface formed on carbon-treated LiFePO4 particles in the cathode of a lithium-ion battery after electrochemical cycling at 23 and 40degreesC in a 1 M LiPF6 mixture of ethylene carbonate and diethyl carbonate. Products from solvent reactions (such as polycarbonates) were not detected at the carbon-treated LiFePO4 surface, contrary to findings for other cathode materials. Salt-based products like LiF, LiPF6, LixPF(y)- and LixPFyOz-type compounds were found on the cathode surface after cycling. Larger amounts of these compounds were detected on the surfaces of electrodes cycled at 40degreesC. (C) 2003 The Electrochemical Society.
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