Patent ID: 11942272
Assignee: SOOCHOW UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A method for preparing an aramid fiber electrochemical capacitor, comprising the following steps:
(1) immersing aramid fiber bundles in an aqueous solution containing dopamine hydrochloride and trimethylolaminomethane hydrochloride to obtain polydopamine-coated aramid fiber bundles;
(2) adding polyvinylpyrrolidone into a silver ammonia solution to obtain a solution C, adding the polydopamine-coated aramid fiber bundles into the solution C, and adding an aqueous glucose solution to the solution C to obtain aramid fiber bundles coated with silver nanoparticles;
(3) adding the aramid fiber bundles coated with silver nanoparticles into an aqueous solution containing γ-(2,3-glycidoxy) propyltrimethoxysilane to obtain aramid fiber bundles coated by silver nanoparticles with epoxy groups on a surface thereof;
(4) adding the aramid fiber bundles coated by silver nanoparticles with epoxy groups into an ethanol containing carbon nanotubes with carboxyl groups to obtain aramid fiber bundles with two-layered coatings of carbon nanotubes and silver nanoparticles;
(5) adding the aramid fiber bundles with two-layered coatings of carbon nanotubes and silver nanoparticles into an aqueous solution containing pyrrole, and adding a silver nitrate aqueous solution to the aqueous solution containing pyrrole, reacting to obtain aramid fiber bundles with three-layered coatings of polypyrrole, carbon nanotubes and silver nanoparticles;
(6) heating a mixture of a polyvinyl alcohol, an acid,_ and water at 50 to 100° C. for 1 to 10 hours and then cooling down to obtain a polyvinyl alcohol gel, immersing two strands of the aramid fiber bundles with three-layered coatings of polypyrrole, carbon nanotubes and silver nanoparticle in the polyvinyl alcohol gel, and twisting the two strands together for solidifying at room temperature to obtain the aramid fiber electrochemical capacitor.