Co3O4-ZnO复合纳米材料的制备及其电化学性能

Preparation and Electrochemical Properties of Co3O4-ZnO Nanocomposites

通过水热法和浸渍煅烧法,在泡沫镍基底上成功制备Co3O4-ZnO复合纳米材料,通过X射线光电子能谱分析(XPS)测定材料的元素组成,通过X射线衍射(XRD)测定材料的晶格结构,通过扫描电子显微镜(SEM)对材料的表面形貌进行表征。在6 mol/L的KOH电解液中,对Co3O4-ZnO复合纳米材料进行循环伏安、恒流充放电、交流阻抗和循环充放电测试。结果表明,在1 A/g的电流密度下,材料的比电容为1248.2 F/g,1000次循环之后,比电容保留率为84.94%,本实验所制备的Co3O4-ZnO复合纳米材料在超级电容器电极材料应用中展现出良好的前景。

Co3O4-ZnO nanocomposites were successfully prepared on the substrate of nickel foam by the hydrothermal method and impregnation calcination method.The elemental composition of the materials was tested by the X-ray photoelectron spectroscopy(XPS),the lattice structure of the materials was tested by the X-ray diffraction(XRD),and the surface morphology of the materials was characterized by the scanning electron microscope(SEM).The cyclic voltammetry,galvanostatic charge-discharge,electrochemical impedance and cyclic charge-discharge tests of the Co3O4-ZnO nanocomposites were carried out in 6 mol/L KOH electrolyte.The results show that the specific capacitance of the material is 1248.2 F/g at the current density of 1 A/g,and the retention rate of the specific capacitance is 84.94%after 1000 cycles.The as-prepared Co3O4-ZnO nanocomposites in the experiment have a promising future in the application of the supercapacitor electrode materials.