Preparation of NiCoTe2 electrode material and electrochemical performance study
Using cobalt nitrate,nickel nitrate,ammonium fluoride and urea as raw materials,tellurium dioxide as tellurium source and foam nickel as substrate,NiCoTe2 electrode materials were prepared by secondary hy-drothermal synthesis method.The material structure and morphology were characterized using XRD and SEM,and the electrochemical performance of the material was studied using cyclic voltammetry,constant current charge discharge testing,and AC impedance testing.The results showed that with the increase of hydrothermal temperature,the diameter of the nanoneedle/rod-shaped morphology of the electrode material increased,and nanoparticles adhered to the surface,increasing the surface area of the electrode material in contact with the e-lectrolyte and the exposure of active sites;The material prepared at a hydrothermal temperature of 140 ℃ ex-hibits the best electrochemical performance,with an internal resistance of 0.63 Ω for the electrode material.When the current density is 1A/g,the mass specific capacitance can reach 781.5 F/g.
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