Synthesis and electrochemical characterization of LixCoO2 for lithium-ion batteries

초록

The cathode material Li<inf>x</inf>CoO<inf>2</inf> was synthesized by preliminary mechanochemical activation of precursor oxide mixture powders, followed by thermal treatment at 800°C for 5h. The effects of the molar ratio of Li/Co on the electrochemical behavior were examined. The Li<inf>x</inf>CoO<inf>2</inf> at Li/Co=1.07 showed superior cycling stability to the Li/Co=1.0 sample. This is attributed to the disappearance of a phase transition related to monoclinic distortion and the relatively lowered transport resistance in Li/Co=1.07 sample. © 2002 Elsevier Science Ltd. All rights reserved.

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