Comparison of Electrochemical Activity of Nanosized a-LiFeO2 Cathode Materials for Li-ion Secondary Battery Using Different Current Collectors

Nanosized a-LiFeO2 cathode material for the Li-ion secondary battery using microporous carbon paper or aluminum current collectors was investigated. The results show that nanosized a-LiFeO2 electrode using microporous carbon paper current collector exhibits much higher discharge capacity than that using aluminum current collector although the cell reaction mechanism is not dependent on the current collector. Moreover, the discharge capacity for the nanosized a-LiFeO2 electrode using microporous carbon paper current collector at different discharge rate is approximately close. This may be attributed to the unique structure and electrochemical stability of microporous carbon paper.