Preparation method for bismuth molybdate/polyaniline composite supercapacitor electrode material

Abstract

The invention provides a preparation method for a bismuth molybdate / polyaniline composite supercapacitor electrode material. The preparation method comprises the following steps of dissolving bismuth nitrate and sodium molybdate into ethylene glycol at a molar ratio at a room temperature to obtain a mixed solution A, and performing ultrasonic uniformity and adding a mixed solution of urea and absolute ethyl alcohol; stirring continuously and uniformly and then pouring the mixed solution into a polytetrafluoroethylene stainless steel hydrothermal reaction kettle, sealing and performing a solvothermal reaction; after naturally cooling, performing washing and drying to obtain bismuth molybdate; performing ultrasonic dispersion of bismuth molybdate and lignin sodium sulfonate into deionized water to obtain a mixed solution, then adding an aniline monomer and p-toluenesulfonic acid, and then changing into ice- bath stirring, after the aniline is dispersed, obtaining a mixed solution B; and slowly dropwise adding an ammonium persulfate solution to the mixed solution B, and after the ice-bath reaction is completed, performing washing and drying to obtain the bismuth molybdate / polyaniline composite material. The method is simple, and the capacitance performance of the prepared bismuth molybdate / polyaniline composite material is greatly improved.

Description

technical field

[0001] The invention belongs to the field of preparation of supercapacitor electrode materials, in particular to bismuth molybdate (Bi molybdate) in which sodium lignosulfonate is a dopant 2 MoO 6 ) / polyaniline (PANI) composite supercapacitor electrode material preparation method. Background technique

[0002] In recent decades, a new type of energy storage device with performance between traditional capacitors and batteries has been developed at home and abroad, that is, supercapacitors, which have higher energy density than traditional capacitors, as well as higher power density of batteries and more Long cycle life, no pollution to the environment, wide operating temperature range, high safety performance, etc., the application prospect is very broad. Supercapacitors mainly use the electric double layer at the electrode / electrolyte interface or the redox reaction on the electrode surface to store charges, and the key to determining its performance is the...

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