Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 147, Issue 4, Pages 1291-1294Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.1393352
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Surface modification of the electrode dramatically improved the performance of a LiCoO(2) electrode charged to 4.6 V.A diamondlike carbon thin film was deposited uniformly on the electrode surface using de plasma chemical vapor deposition. This surface treatment suppressed electrolyte decomposition during the charge process. When a coin-type cell using this electrode was charged to 4.6 V, the discharge capacity in the first cycle was 212 mAh/g and the charge-discharge efficiency was over 90% through five cycles. This treatment suggests a new approach to the development of cathodes for lithium-ion secondary batteries. (C) 2000 The Electrochemical Society. S0013-4651(99)09-083-7. All rights reserved.
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