Flexible porous polypyrrole film, preparation method and application of flexible porous polypyrrole film as electrode

Abstract

The invention discloses a flexible porous polypyrrole film, a preparation method and application of the flexible porous polypyrrole film as an electrode and belongs to the field of preparation of polypyrrole electrodes. The preparation method of the flexible porous polypyrrole film comprises the following steps that 1) a PPy nanotube water solution is placed on an inert metal foam plate to be filtered, then drying is carried out, and an inert metal foam plate to which a PPy nanotube is attached is obtained; 2) the inert metal foam plate to which the PPy nanotube is attached is adopted as a positive electrode, and immersed in electrolyte containing monomer pyrrole and doping ions for electrochemical polymerization, and an inert metal foam plate to which a PPy layer is attached is obtained,wherein the pH of the electrolyte ranges from 2 to 5; and 3) the inert metal foam plate to which the PPy layer is attached is washed and dried, then the PPy layer is taken down from the inert metal foam plate, and the flexible porous polypyrrole film is obtained. The PPy film prepared through the steps is good in integrity and electrical conductivity and high in porosity and electrochemical activity.

Description

technical field [0001] The preparation field of polypyrrole electrode of the present invention, especially a kind of flexible porous polypyrrole membrane, preparation method and its application as electrode. Background technique [0002] PPy, that is, pyrrole black, is an amorphous powder material, insoluble in water and organic solvents, and has good electrical conductivity. Since the late 1980s, researchers from various countries have extensively and deeply studied the role of PPy in energy storage. , sensors, electric-force actuators, electrochromic, metal anti-corrosion, and drug sustained release applications. [0003] Commonly used synthesis methods include chemical synthesis and electrochemical synthesis; the preparation of PPy by chemical methods generally uses an oxidant to oxidize the monomer into a black powder, and the commonly used oxidant is FeCl 3 and (NH 4 ) 2 S 2 o 8 , some researchers also use hydrogen peroxide and other transition metal salts to oxidi...

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Problems solved by technology

Wang et al firstly prepared croissant-shaped PPy by electrochemical method, but the porosity of PPy prepared by this method needs to be further improved; Kopecka et al. prepared PPy nanotubes by chemical method, but such nanotubes often The use of non-conductive binders to bond together ultimately reduces the conductivity of the electrode material; some scholars also use chemical and electrochemical methods to add the second or third phase to the PPy preparation process to prepare PPy porous composite materials. The electrode material prepared by the preparation method is relatively complicated, and the electrochemical activity needs to be further improved.

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