A kind of preparation method of nickel foam supported praseodymium doped cobalt tetroxide supercapacitor electrode material

Abstract

The invention relates to a method for preparing an electrode material for a foamed nickel-loaded praseodymium-doped cobalt tetroxide supercapacitor, which belongs to the field of electrode material production. The steps are to first cut the foamed nickel into a foamed nickel sheet of a suitable size, clean it, and dry it for later use; Dissolve praseodymium nitrate hexahydrate and cobalt nitrate hexahydrate in water containing urea at a mass ratio of 1:10, stir evenly to obtain a mixed solution; The nickel flakes were placed in a high-pressure reactor and sealed; reacted under hydrothermal conditions of 140-150°C, and cooled to room temperature; the foamed nickel flakes with pink precursors were taken out, washed, and dried; the dried pink precursors were The solid nickel foam flakes are calcined in a muffle furnace to obtain praseodymium-doped Co 3 o 4 Nanosheet array, the preparation process is simple, environment-friendly, low cost and this material has the advantages of relatively high specific capacitance, long-term stability, low overpotential and the like.

Description

technical field [0001] The invention belongs to the technical field of electrode material preparation methods, and more specifically relates to a preparation method of foamed nickel-loaded praseodymium-doped tricobalt tetroxide supercapacitor electrode materials. Background technique [0002] Supercapacitors (SCs), also known as electrochemical capacitors, have attracted extensive research interest in the past decade due to their excellent properties such as high power density, long lifetime, and fast charge-discharge characteristics. It is well known that the morphology, size and composition of electrode materials play an important role in the performance of SCs. [0003] Among them, among various materials, RuO 2 has excellent supercapacitive performance, but its high cost and toxic characteristics have seriously hindered its commercial application, therefore, various metal oxides with low cost and good environmental compatibility, such as NiO, Co 3 o 4 , MnO 2 have be...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the shortcomings of the Co oxide electrocatalyst prepared in the prior art, such as poor conductivity and low catalytic efficiency in the use of supercapacitors, and also solve the problems of the existing synthesis technology in the preparation process. Insufficient conditions such as harsh conditions in the synthesis process, poor operation, and high energy consumption have provided a method for the preparation of foamed nickel-loaded praseodymium-doped cobalt tetroxide supercapacitor electrode materials. The method uses a simple hydrothermal decomposition method to prepare Pr- co 3 o 4 / NF, not only the preparation process is simple, the environment is friendly, the cost is low, and the prepared material has the advantages of relatively high specific capacitance, long-term stability, low overpotential, etc., but also the crystal morphology is controllable and can be directly grown on on nickel foam