Effect of Cathode/anode Weight Ratio in $LiCoO_2/MPCF$ Cell

Abstract

Li-ion cells employ lithium transtion metal oxide as the cathode material and carbon as anode material. To manufacture Li-ion cell with higher capacity and better cycle life, the utilization of electrode materials should be as high as possible without lithium deposition onto the carbon surface during charging. A careful design of cell balance between cathode and anode materials as well as a proper charge method is a key factor to design Li-ion cell with long cycle life. In this study, we investigated the effect of cathode/anode weight ratio on the performance of cell. First we evaluated the charge-discharge behaviours of half-cells. And cylindrical Li-ion cells were fabricated using graphitized MPCF anode and cathode. The voltage profiles for each half-cell in cell were measured by using lithium metal as a reference electrode. Also, we evaluated the cyclic performance of cells according to weight ratio. From the result of experiment cathode utilization was independent of weight ratio, but MPCF anode utilization was dependant on weight ratio. Also, the optimal weight ratio of cell was found to be .