Development of anode materials for lithium secondary battery

A new graphite material, Granode Type-H, having a high capacity and other excellent properties as the anode material of lithium secondary battery was developed through graphitization of a raw material, i.e. pitch coke carbon added with a boron compound. Fundamental studies leading to the material design of the new graphite product were carried out and the basic characteristics and performance with those of conventional graphite materials were compared. Superior properties of the new material were confirmed in the comparison, such as high anodic performance in an electrolyte containing propylene carbonate in the solvent, which markedly deteriorates performance of conventional materials, besides excellent discharge capacity, rate characteristics, press formability, etc.