石墨烯及其复合材料在锂离子电池中的应用

Graphene and its composites applied to lithium-ion battery

介绍了石墨烯的物理化学性质,在锂离子电池中的应用及产业化的情况。石墨烯因其特殊的二维结构,具有与石墨负极不同的电化学性能。对石墨烯作为锂离子电池负极材料的电化学性能及其影响因素、制备方法、储锂机理等做了介绍。从石墨烯用于锂离子电池的两个方面材料,即负极及复合电极材料,对石墨烯电极国内外的研究状况做了介绍。与石墨负极相比,石墨烯电极具有高容量、高功率密度的优点,但也存在首周库仑效率低、充放电过程极化较大等缺点。目前石墨烯还未实现产业化,石墨烯电池的研发也多处于概念阶段。

The physicochemical properties of graphene and its application in lithium-ion battery and industrialization condition were reviewed. Due to its unique two-dimensional nanostructure, graphene has different electrochemical performance from graphite anode. The electrochemical performance of graphene used as lithium-ion battery anode material and the influencing factors, synthesis methods and Li storage mechanism were summarized. Recent research of grapheme electrode at home and broad was reviewed on two application aspects of graphene for lithium-ion battery： graphene anode material and graphene-based composites. Compared to graphite anode, graphene electrode shows higher capacity and power density. However, there are some disadvantages including low initial coulombic efficiency and large polarization during charge and discharge process. Now the industrialization of graphene isn＇t achieved, and the research and development of graghene-based lithium-ion batteries are more in the conceptual phase.