几种石墨材料的电化学性能测试  

Electrochemical performance of several kinds of graphite

作　　者：颉莹莹[1] 李雅楠[1] 杨晖[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《电源技术》2012年第2期182-185,共4页Chinese Journal of Power Sources

摘　　要：对几种天然石墨和人造石墨材料进行了X射线衍射光谱法(XRD)表征和电化学性能测试。结果表明,所有的样品都具有良好的石墨层状结构及较高的可逆比容量。人造石墨中存在少量无定形碳,具有比理论比容量更高的比容量。天然石墨不可逆比容量损失较大,主要是由于其较小的颗粒粒径和大的比表面积而引起的。Several kinds of natural graphite and artificial graphite samples were characterized by XRD,and their electrochemical performance was tested.The results show that all samples have well-ordered graphitized structures and exhibit good reversible capacity.A capacity higher than theoretical capacity of artificial graphite(AG2) is attributed to the presence of small amount of disordered carbon.The natural graphite(NG2) shows a large irreversible capacity loss due to its small particles size and thus high specific surface area.

关 键 词：锂离子电池 负极材料 天然石墨 人造石墨 

分 类 号：TM912.9[电气工程—电力电子与电力传动]