Preparation And Electrochemical Properties Of Composites Electrode Materials Based On Nickel Foam

With the rapid development of social economy,traditional energy is constantly consumed,and environmental problems are becoming more and more serious.How to find green energy and pay more and more attention to ecological environment has attracted more and more attention.As a new type of energy storage components,supercapacitors have attracted more and more attention because of their irreplaceable advantages.At present,how to improve the electrochemical performance of electrode materials and how to simplify the operation process has become a major problem.In this context,this paper has done the following work.Firstly,by loading NiCo₂S₄ via a two-step hydrothermal method on the carbide-filled nickel foam,which was prepared by sintering epoxy-resin-filled nickel foam,a NiCo₂S₄-loaded epoxy-resin-carbide-filled nickel foam composite electrode material was finally prepared.The microstructure was characterized by SEM,XRD,BET and Raman.The electrochemical properties were tested by cyclic voltammetry,constant current charge-discharge curve,electrochemical impedance and cyclic stability.The area specific capacitance of composite electrode material is as high as 9.28 F/cm² at a current intensity of 4mA/cm²,and the specific capacitance retention rate is 60.0%after 2000 cycles.Secondly,by loading NiCo₂S₄ on flake-copper-powder-filled nickel foam through a two-step hydrothermal method,a NiCo₂S₄-loaded flake-copper-powder-filled nickel foam composite electrode material was finally prepared.The microstructure was characterized by SEM,XRD,BET,etc.The effects of hydrothermal reaction temperature and time on the electrochemical properties of composite electrode material were investigated,and the optimal hydrothermal loading conditions were determined.Finally,the mixture of acetylene black and PAN was used to fill the nickel foam mesh,then loaded Ni3S2 on them by a hydrothermal method,for preparing a Ni3S2-loaded acetylene black-PAN-filled nickel foam composite electrode material.The microstructure was characterized by SEM,XRD,FT-IR,BET and Raman.The electrochemical properties were tested by cyclic voltammetry,galvanostatic charge-discharge curve,electrochemical impedance and cyclic stability.The area specific capacitance of composite electrode material reached 15.3 F/cm² at current intensity of 8 mA/cm²,and the specific capacitance retention rate is 67.1%after 1000 cycles.