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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 8
BKCSDE 31(8)
August 20, 2010 

A Surfactant-based Method for Carbon Coating of LiNi0.8Co0.15Al0.05O2 Cathode in Li Ion Batteries
Youngmin Chung, Seong Hyeon Ryu, Jeong Hun Ju, Yu Rim Bak, Moon Jin Hwang, Ki Won Kim, Kwon Koo Cho, Kwang Sun Ryu*
Lithium-ion battery, Cathode, Carbon-coating, Lithium-nickel-cobalt-aluminum oxide, Surfactant
A LiNi0.8Co0.15Al0.05O2 (LNCAO/C) active material composite cathode was coated with carbon. The conductive carbon coating was obtained by addition of surfactant during synthesis. The addition of surfactant led to the formation of an amorphous carbon coating layer on the pristine LNCAO surface. The layer of carbon coating was clearly detected by FE-TEM analysis. In electrochemical performance, although the LNCAO/C showed similar capacity at low C-rate conditions, the rate capability was improved by the form of the carbon coating at high current discharge state. After 40 cycles of charge-discharge processes, the capacity retention of LNCAO/C was better than that of LNCAO. The carbon coating is effectively protected the surface structure of the pristine LNCAO during Li insertion-extraction.
2304 - 2308
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