用于锂离子电池的石墨烯及其复合负极材料的研究进展

Progress in Graphene and Its Composites as Anode Material for Lithium-ion Battery

石墨烯复合材料因具有高比表面积、高比容量、优异的导电性、显著的化学稳定性,在锂离子电池领域具有巨大的应用前景。在负极复合材料中,石墨烯不仅可以形成导电网络提升复合材料的导电性能,而且还可以缓冲材料在充放电过程中的体积效应,提高了材料的倍率性能和循环寿命,为设计大容量高稳定性的锂离子电池提供了理论保证。因此制备不同组成和结构的石墨烯复合材料是一个非常有价值的课题。对近年来国内外运用不同方法制备不同组成和结构的石墨烯复合材料的研究结果做了综合评述和展望。

With high specific surface area,high Li-ion storage capacities,superior electrical conductivity and outstanding chemical stability,graphene composite as the lithium-ion battery anode material shows excellent electrochemical performance.In this paper,we highlight recent advancements and expound the advantage in the studies of the graphene composite used in lithium-ion battery.Graphene acts as not only a conductive network to enhance the electric conductivity of the anode composite materials,but also a mechanically stable buffer to accommodate the volume effect during cycling.The graphene-containing anode composite materials can show better cycling and rate performances.Therefore,the synthesis of composite materials with diverse morphologies and structures is an extremely significant research subject.The synthesis of composite materials with diverse morphologies by distinct means at home and abroad in recent years is reviewed and previewed comprehensively.