Ni(OH)_2/石墨相氮化碳/石墨烯复合材料的制备及电化学性能

Preparation and electrochemical properties of Ni(OH)_2/graphite phase carbon nitride/graphene composites

通过微波法制备氢氧化镍Ni(OH)_2、石墨相氮化碳(g-C_3N_4)、石墨烯(RGO)复合材料,研究了不同配比组合对复合材料结构、形貌和电化学性能的影响.通过X射线衍射(XRD)、扫描电子显微镜(SEM)及傅里叶红外光谱(FT-IR)表征材料的表面微观结构和还原程度.采用循环伏安(CV)、恒流充放电(GCD)及电化学阻抗(EIS)测试电极材料的电化学性能.结果表明:由Ni(OH)_2,g-C_3N_4,RGO制备的三元复合材料为三维片层空间互相交错结构,当电流密度为1 A/g时,电极材料的比电容为741. 9 F/g,显示出良好的电化学性能.

Ni(OH) 2,graphite phase carbonitride (g-C 3N 4) and graphene (RGO) composites were prepared by microwave method. The effects of different ratios on the structure,morphology and electrochemical properties of the composites were investigated. X-ray diffraction (XRD),scanning electron microscopy (SEM),and Fourier transform infrared spectroscopy (FT-IR) were used to characterize the surface microstructure and the degree of reduction of the material. The electrochemical properties of electrode materials were tested using cyclic voltammetry (CV),constant current charge and discharge (GCD) and electrochemical impedance (EIS). The results show that the ternary composites prepared by Ni(OH) 2,g-C 3N 4 and RGO are three-dimensional interlaminar interlaced structures. When the current density is 1 A/g,the specific capacitance of the electrode materials is 741.9 F/g,showing good electrochemical performance.