本发明公开了一种用于超级电容器的Co2MnO4/RGO复合材料及其制备方法和应用，具体步骤为：KMnO4，Co(AC)2·4H2O和Mn(AC)2·4H2O作为合成原料，通过一步水热法在还原氧化石墨烯（RGO）的表面包覆生长Co2MnO4，形成Co2MnO4/RGO复合材料。本发明所述的制备方法选用还原氧化石墨烯为原料，使得制备的Co2MnO4/RGO复合材料具有大的比表面积，良好的导电性，以其作为电极材料，极大的提高了超级电容器的比容量、倍率性能和电化学稳定性；制备方法具有简单，成本低等优点。在超级电容器三电极体系测试中，本发明制备的材料在1A g‑1的电流密度下表现出1719 F g‑1的高比容量，表现出良好的电化学性能。
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