PARTICLE SIZE EFFECT OF MCMB ON THE PERFORMANCE OF LITHIUM ION BATTERIES

A study has been made of particle size effect of MCMB on the performance of lithium ion batteries. Results indicated that the first charge discharge efficiency increased from 86.2 % to 90.5 % when the particle size increased from 11.2 μm to 24.8 μm i.e., the larger the particle size, the higher the discharge capacity. On the contrary, the cycle life was slightly poor for large particle size. Further investigation showed when weight ratio of large particle to small particle is nearly 7:3 in particle size distribution, the battery has the higher discharge capacity capacity and long cycle life.