基于GO模板法制备金属氧化物超薄纳米片及其超电容性能的研究

Study on Supercapacitive Performance of Ultra-thin Metal Oxide Nanosheets Prepared by GO Template

采用GO模板法制备ZnO、NiO、Co3O4超薄纳米片,选用三维多孔泡沫镍作(NF)为导电基材,并通过一步水热法制备出ZnO/NF、NiO/NF、Co3O4/NF复合电极材料,探究三种纳米片材料对复合材料的结构和电化学性能的影响,Co3O4/NF复合电极材料,因其具备高度开放的多孔结构,增加了与电解液的接触面积,为氧化还原反应提供了有利的条件,在电流密度为3 A·g^-1时,质量比电容高达2633 F·g^-1,因此,Co3O4/NF复合电极材料的电容性能最好。

The ZnO,NiO and Co3O4 ultra-thin nanosheets were synthesized by using a GO template method.Three-dimensional porous foam nickel was used as the conductive substrate.ZnO/NF,NiO/NF and Co3O4/NF composite electrode materials were prepared by one-step hydrothermal synthesis.The effect of this kind of nanosheet material on the structure and electrochemical performance of composite materials was studied.Co3O4/NF composite electrode material can increase the contact area with the electrolyte,and provide favorable conditions for the redox reaction because of its highly open porous structure.When the current density was 3 A·g^-1,the mass specific capacitance was as high as 2633 F·g^-1.Therefore,the supercapacitive performance of Co3O4/NF composite electrode material was the best.