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Carbon‐coated natural graphite has been prepared by thermal vapor decomposition treatment of natural graphite at 1000°C. Natural graphite coated with carbon showed much better electrochemical performance as an anode material in both propylene carbonate‐based and ethylene carbonate‐based electrolytes than "bare" natural graphite. The effect of carbon coating on the electrochemical performance was investigated by solid‐state in conjunction with standard electrochemical techniques. © 2000 The Electrochemical Society. All rights reserved.
Yoshio et al. (Sat,) studied this question.