Preparation And Supercapacitor Performance Of Composite Of NiO And Nitrogen Deoped Carbon Nanotubes

Supercapacitor is a new, efficient, environmental chemical power and get moreattention. supercapacitor has more useful than traditional chemical battery. In theresearch of the supercapacitor, it is of great practical value and theoretical significanceto develop electrode materials with high specific capacity. In this paper, Nitrogendoped CNT(NCNNT) is produced by treatment with carbonization after in-situpolymerization. NiO/NCCNT is produced by liquid phase deposition-thermaldecomposition, which NCCNT is a raw material. And the electrochemicalperformance has been studied as electrode materials of supercapacitor. The mainstudies of this paper as follows:(1) Pyrrole is coated on CNT by in-situ polymerization, and then PPy/CNT isobtained. Then, PPy/CNT is carbonized at700℃and900℃to get NCCNT. NCCNTis characterized by X-ray photoelectron spectroscopy (XPS), and It shows that thesurface of material is doped with nitrogen after carbonization.(2) NiO/NCCNT is produced by liquid phase deposition-thermal decomposition,which Nitrogen doped CNT is a raw material. X-ray diffraction(XRD), Scanning electronmicroscopy (SEM), Transmission Electron Microscope(TEM), specific surface areaanalyzer are used to characterize the surface morphology and composition of material.The results showed that:The composite material is prepared successfully and having ahigh specific surface area. Cyclic voltammetric (CV) measurements，electrochemicalimpedance spectrum (EIS) and constant current charge-discharge are used to discussthe electrochemical performance of the electrode materials.It show that the compositematerial has a high specific capacitance when nitrogen-doped carbon nanotube massfraction is24%in composite materials,which the composite materials is produced byNiO and NCCNT with carbonized at700℃.The specific capacitance is114F·g-1inthe discharge current of5mA,and the specific capacitance remains more than68%ofthe initial after1000cycles. The material’s esistance is0.34, whith has a goodconduction. Improving hydrophility and making the electrode material and theelectrolyte contacted conveniently contributed by nitrogen doped, and good electricalconductivity of carbon nanotubes is further improved electrochemical properties ofthe composite material, with the adding of NCCNT. The composite electrode materialhas a superior performance. Therefore, the research of this paper provides theoreticaland experimental basis for finding nitrogen-doped activated carbon material withbetter performance.