CHARGE DISCHARGE PROPERTIES OF THE MESOCARBON MICROBEADS FOR THE ANODS OF LITHIUM ION BATTERIES

Mesocarbon microbeads is a promising carbon material for the anode of lithium ion batteries. MCMBs were heat treated at various temperatures, and the relationship between the microstructure of the MCMBs heat treated at various temperatures and their electrochemical properties for the anode of lithium ion batteries was investigated. It was found that the discharge capacity of MCMBs increased drastically with the temperature rising from 700 ℃ to 1 000 ℃, which was different from that in the temperature range of 1 700 ℃ to 2 800 ℃. The discharge capacity of MCMB heat treated at 700 ℃ was 425 mAh/g which was higher the theoretical capacity of graphite (376 mAh/g).The micropore in MCMBs seems to have some capacity of storing lithium ion.