Preparation method of supercapacitor composite electrode material

Abstract

The invention discloses a preparation method of a supercapacitor composite electrode material, which belongs to the preparation method of a capacitor electrode material. The method is to use SnCl2.nH2O and RuCl3.nH2O as precursors, and nano-TiO2 as a doping medium; through wet ball milling process and cell crushing ultrasonic method, nano-TiO2 is highly dispersed in ethanol to form a suspension, and the suspension Mix with SnCl2.nH2O, RuCl3.nH2O, deionized water, add NH4HCO3 solution until the reaction is complete, let it stand for 7-8 hours, sinter the precipitate and cool it to room temperature with the furnace to obtain a nanoscale SnO2 / RuO2 composite. Compound, PVDF and carbon black are mixed and ground in proportion, and the slurry is prepared by adding nitrogen potassium pyrrolidone dropwise. The slurry is painted on the plasma-modified substrate to form a thin film, and the electrode material is obtained by vacuum drying. The composite electrode material prepared by the method of the invention has the characteristics of large specific capacitance, small equivalent series resistance, stability and low cost, and is a method for preparing capacitor electrode materials.

Description

technical field [0001] The invention relates to a preparation method of a capacitor electrode material, in particular to a preparation method of a supercapacitor composite electrode material. Background technique [0002] A supercapacitor is a new type of energy storage device between a physical capacitor and a chemical power source. It has the characteristics of high power density, fast charging speed, long cycle life, good safety, and environmental friendliness. It is mainly composed of electrode materials, diaphragms, electrolytic liquid and packaging materials. Among them, the performance parameters of electrode materials have a direct impact on the technical performance of such devices. [0003] There are two main types of supercapacitors: electric double layer capacitors and Faraday quasi-capacitors. The specific capacitance and energy density of electric double layer capacitors made of carbon-based materials are far lower than those of transition metal oxides RuO 2...

AI Technical Summary

Problems solved by technology

At present, the electrodeposition method is mainly used to prepare SnO for supercapacitors. 2 , RuO 2 Composite electrode material, although the specific capacitance value of the composite electrode is high and the film thickness is uniform, it is sensitive to the pH response of the solution during the preparation process and is not easy to control; and the precursor SnCl 2 .nH 2 O, RuCl 3 .nH 2 Lower utilization of O, resulting in higher cost

However, the sol-gel method is used to prepare supercapacitor electrode materials. Although the active material of the electrode is in a porous hydrated state, its specific capacitance value is also high, and it is beneficial to industrial production; Evenly dispersed porous active materials lead to low electrode performance