2001 Volume 69 Issue 8 Pages 603-607
To improve the performance of the positive electrodes for lithium-ion batteries, the particle-size and the mixing ratio effect of different size LiCoO2 powders on discharge capacity were investigated. The optimum mixing ratio between large (average diameter: 30 µm) and small (average diameter: 0.5 µm) powder particle size has been found. The largest capacity and the smallest electrode resistance are obtained when the large particle size fraction is about 70 wt%. The smaller the particle size ratio, the larger the discharge capacity and the smaller the electrode resistance, where the particle size ratio is the ratio of the average diameter of the smaller component to that of the larger one. These results indicate that discharge capacity is closely related to LiCoO2 powder packing.
