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1 Materials Science Poland

1 2009

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Improvement of LiCoO2 cathodes by using Ag2V4O11 as an additive

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Cao X. , Liu J. , Wan J. , Xie L. , Yan X. , Wang H.

tom Vol. 27, No. 1

287--295

LiCoO2/Ag2V4O11 composites were fabricated as cathode materials for lithium ion batteries by mechanical mixing of commercial LiCoO2 and Ag2V4O11 powders. The underlying principle of this idea was that the metallic silver particles were formed and acted as a conducting matrix when Ag2V4O11 cathode was electrochemically reduced which could significantly increase the electronic conductivity and decrease the polarization of cathode materials. The structure, morphology and electrochemical performance of bare LiCoO2 and LiCoO2/Ag2V4O11 composites were analyzed by XRD, SEM and charge-discharge test of CR2016 coin cells. The results show that a low amount of Ag2V4O11 additive can effectively enhance the discharge capacity and cycleability of LiCoO2. The composite containing 3 wt. % of Ag2V4O11 exhibits a higher discharge capacity and better cycle life than bare LiCoO2.