High Rate Performance of Li[Co 0.50 Li 0.17 Mn 0.33 ]O 2 Cathode

[ ] powder was prepared using a simple combustion method. specially, ratio of 2:1, 3:2, 1:1, 2:3, 1:2 was adopted as acetate source/nitrate source. The diffraction pattern of powder showed that this compound could be classified as hexagonal structure (space group : ). The size of powder was less than . Small particle size of cathode powder would give a good ionic and electronic conductivity to cathode electrode, which made of cathode powder. As the increase of nitrate source-ratio, discharge capacity of at high charge-discharge rate was increased. When the ratio of acetate source/nitrate source was 1:2, discharge capacity at 10 C rate (2000 mA/g) was 180 mAh/g. It was larger than that of powder, which have 2:1 as acetate source/nitrate ratio.