This study examined the effects of micro- (crystallinity) and macro (orientation)-crystalline properties of graphite on the initial efficiency, discharge capacity, and rate performance of anodic materials. Needle coke and regular coke were selected as raw materials and pulverized to 2–25 μm to determine the effects of crystalline properties on particle shape after pulverization. Needle coke with outstanding crystallinity had high initial efficiency, and smaller particles with larger specific surface areas saw increased irreversible capacity due to the formation of SEI layers. Because of cavities existing between crystals, the poorer the crystalline properties were, the greater the capacity of the lithium ions increased. As such, regular coke had a 30 mAh/g higher discharge capacity than that of needle coke. Rate performance was more affected by particle size than by crystalline structure, and was the highest at a particle distribution of 10–15 μm.

这项研究检查了石墨的微观（结晶度）和宏观（取向）结晶性质对阳极材料的初始效率，放电容量和倍率性能的影响。选择针状焦和常规焦作为原料，并粉碎至2–25μm，以确定粉碎后结晶性能对颗粒形状的影响。具有出色结晶度的针状焦具有较高的初始效率，并且具有较大比表面积的较小颗粒由于SEI层的形成而具有不可逆容量的增加。由于晶体之间存在空穴，所以晶体性能越差，锂离子的容量越大。因此，普通焦炭的放电容量比针状焦高30 mAh / g。