Copper manganese oxide-graphene (CuMn₂O₄-RGO) composite was prepared by sol-gel method and then synthesized by physical grinding, which was further applied to electrode materials for supercapacitors. The structure and morphology of the composites were analyzed by means of characterization, such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscope (SEM), transmission electron microscopic (TEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric (TG) analysis, and Raman. The electrochemical tests including cyclic voltammetry (CV), galvanostatic charge-discharge, electrochemical impedance spectroscopy (EIS) and cyclic life were used to investigate electrochemical properties of CuMn₂O₄-RGO so as to optimize its composition. Through the comparison of electrochemical properties at different mass ratios, current densities and scan rates, it was found that when the mass ratio was m (CuMn₂O₄): m (RGO) =1:1, the as-prepared CuMn₂O₄-RGO exhibited the excellent electrochemical properties. The capacitance reached 342 F g⁻¹ at the current density of 1.0 A g⁻¹, which was significantly higher than that of pure CuMn₂O₄ and RGO. The higher capacitance performance can be comparable with the reported literature value. Meanwhile, the energy density of CuMn₂O₄-RGO (1:1) is significantly higher than that of CuMn₂O₄ and RGO. Therefore, CuMn₂O₄-RGO (1:1) composite has a good prospect as electrode material for supercapacitor.

采用溶胶-凝胶法制备了氧化铜锰-石墨烯（CuMn ₂ O ₄ -RGO）复合材料，然后通过物理研磨合成，进一步应用于超级电容器电极材料。通过表征，如X射线衍射（XRD），傅立叶变换红外光谱（FT-IR），扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线等对复合材料的结构和形貌进行了分析。光电子能谱（XPS），热重（TG）分析和拉曼光谱。CuMn ₂ O _4的电化学性能包括循环伏安法（CV），恒电流充放电，电化学阻抗谱（EIS）和循环寿命等电化学测试。-RGO，以优化其组成。通过比较不同质量比，电流密度和扫描速率下的电化学性能，发现当质量比为m（CuMn ₂ O ₄）：m（RGO）= 1：1时，制得的CuMn ₂ O _4- RGO表现出优异的电化学性能。在1.0 A g ^-1的电流密度下，电容达到342 F g ^-1，明显高于纯CuMn ₂ O ₄和RGO的电容。更高的电容性能可以与报道的文献值相媲美。同时，CuMn ₂ O ₄的能量密度-RGO（1：1）明显高于CuMn ₂ O ₄和RGO。因此，CuMn ₂ O ₄ -RGO（1：1）复合材料作为超级电容器的电极材料具有良好的应用前景。