石墨烯-氧化镍复合材料的制备及其电化学性能研究

Preparation and Electrochemical Performance of Graphene-NiO Composites

以不同的镍盐(氯化镍、醋酸镍)作为镍源,氧化石墨烯、乙二醇和尿素等为原料,利用微波辅助合成方法制备了石墨烯-氧化镍复合材料。通过X射线衍射、拉曼光谱、扫描电子显微镜、电化学工作站等分析测定了石墨烯-氧化镍复合材料的组织结构、形貌特征和电化学性能。结果表明:石墨烯-氧化镍复合材料的比容量达到了2137 F/g,而单纯氧化镍材料的比容量仅为667 F/g。相比单纯氧化镍,石墨烯-氧化镍复合材料具有更优异的电化学性能,是一种很有潜力的超级电容器电极材料。

Graphene-nickel oxide composites were prepared by microwave-assisted solvothermal method with different nickel salts(nickel chloride and nickel acetate)as the nickel source,graphene oxide,ethylene glycol and urea as raw materials.The microstructure,morphology and electrochemical performance of the composites were characterized by X-ray diffraction,Raman spectra,scanning electron microscopy and electrochemical workstation.The electrochemical test results showed that the specific capacity of the graphene-nickel oxide composite reached 2137 F/g.However,the specific capacity of pure nickel oxide was only 667 F/g.Compared with pure nickel oxide,graphene-nickel oxide composites exhibit superior electrochemical properties and are promising electrode materials for supercapacitors.