The present invention provides a quinone compound-graphene composite material, including quinone compound and graphene, where the quinone compound is chemically bonded on the surface of the graphene, and the quinone compound is quinone compound monomer or quinone polymer. The quinone compound-graphene composite material has high energy density, high flexibility, high conductivity, and high stability, and can be used as cathode material for preparing flexible electrode. Embodiments of the present invention further provide preparation method of quinone compound-graphene composite material, and flexible lithium secondary battery using the quinone compound-graphene composite material as cathode active material.
本发明提供了一种醌化合物-
石墨烯复合材料,包括醌化合物和
石墨烯,其中醌化合物
化学键合在
石墨烯表面,醌化合物为醌化合物单体或醌聚合物。醌化合物-
石墨烯复合材料具有高能量密度、高柔性、高导电性和高稳定性,可用作制备柔性电极的阴极材料。本发明实施例进一步提供了醌化合物-
石墨烯复合材料的制备方法,以及使用醌化合物-
石墨烯复合材料作为正极活性材料的柔性
锂二次电池。