Abstract: Graphite oxide (GO) was prepared by a modified Hummer method, and three-dimensional redox graphene oxide-Ag/nickel foam (rGO-Ag/NF) composite prepared by dry immersion method. Its crystalline phase, morphology and composition were characterized, and electrochemical properties analyzed, such as galvanostatic charge-discharge and cyclic voltammogram. The results showed that rGO-Ag/NF composite had a porous structure in which the diameter of Ag particles was 200 nm. At the current density of 5 mA/cm2, its specific capacitance was estimated as 1.59 F/cm2. The composite also had a retention rate of 70% of its initial capacitance after 1000 cycles, indicating excellent recycling stability.

Key words: dry immersion, redox graphene oxide-Ag/nickel foam composite, structure, electrochemical property, supercapacitor

摘要： 采用改进的Hummer法制备氧化石墨(GO)，以干燥浸泡法制备三维氧化石墨烯(rGO)-Ag/泡沫镍(NF)复合材料，对其物相、形貌和组成进行分析，研究了其电化学性能. 结果表明，复合材料呈疏松多孔结构，Ag颗粒直径为200 nm，电流密度为5 mA/cm2时初次比容量为1.59 F/cm2，循环1000次后为初始容量的70%，循环稳定性良好.

关键词: 干燥浸泡法, 氧化石墨烯-Ag/泡沫镍复合材料, 结构, 电化学性能, 超级电容器