Method for preparing high-capacitance polyaniline and nickel oxide composite electrode material

Abstract

The invention relates to a method for preparing a high-capacitance polyaniline and nickel oxide composite electrode material and belongs to the technical field of electrochemical capacitors. According to the method, lyotropic liquid crystal formed by anion-cation surfactants and fatty alcohols of C6 to C8 is used as a soft template, aniline doped with sulfuric acid and sulfuric acid solution of a certain concentration are dissolved into the hydrophilic layer and the lipophilic layer in the liquid crystal, then, a timed potential is applied to an electrode, and a polyaniline / metallic nickel composite material with certain structure and morphology is obtained through electro-deposition. The obtained composite material is oxidized in high-purity oxygen, and then the composite electrode material is obtained. The method and devices are simple, the electrode material with high specific capacitance is high in purity and uniform in morphology and phase state and has very good cyclic voltammetry performance, the specific capacitance of the electrode material can be up to 1520F / g, more than 1350 charging and discharging cycles can be achieved, and the manufactured material has great application potential in the aspects of capacitors, energy storage and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochemical capacitor materials. Background technique [0002] The pseudocapacitance produced by conductive polyaniline by its own redox reaction is much larger than that of the electric double layer. Compared with carbon-based supercapacitor materials, it has a great advantage in terms of specific energy. It has relatively fast charge and discharge performance, fast Doping and dedoping ability, strong plasticity. In the era of rapid economic and social development, electrochemical supercapacitors have attracted widespread attention as a lightweight, flexible, and promising modern energy storage device. Polyaniline is one of the most practical conductive polymers. Because of its simple synthesis, excellent environmental stability, high conductivity and high specific capacitance, polyaniline has been widely used in electrode materials for supercapacitors and has great application prospects, but polya...

AI Technical Summary

Problems solved by technology

The patent with the publication number: CN101570349 discloses a new method for preparing a nickel oxide capacitor material. Although the preparation method is simple and has no pollution to the environment, the specific capacitance of the capacitor obtained by this method is low, only 200 F / g

The publication number is: CN1098397 patent, although the prepared capacitor material has a high specific capacitance, but the raw materials used in the invention are expensive and cannot be mass-produced

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