Aramid fiber electrode and preparation method therefor

A method for preparing an aramid fiber electrode, 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, followed by adding dropwise an aqueous glucose solution to obtain aramid fiber bundles coated with silver nanoparticles;
• (3) adding the aramid fiber bundles coated with silver nanoparticles into an aqueous solution containing (3-glycidoxypropyl)trimethoxysilane to get 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 on the surface into ethanol containing carbon nanotubes with carboxyl groups to obtain aramid fiber bundles with double-layered coatings of carbon nanotubes and silver nanoparticles;
• (5) adding the aramid fiber bundles with double-layered coatings of carbon nanotubes and silver nanoparticles into an aqueous solution containing pyrrole, and then adding dropwise a silver nitrate aqueous solution to obtain the aramid fiber electrode.