Thermoelectric conversion material, thermoelectric conversion device and preparation method and application thereof

The invention belongs to the technical field of thermoelectric conversion, and particularly relates to a thermoelectric conversion material, a thermoelectric conversion device and a preparation method and application thereof. The thermoelectric conversion material comprises double-network hydrogel and conductive ions, wherein the conductive ions are dispersed in the double-network hydrogel; a first network structure of the double-network hydrogel is obtained by copolymerizing and crosslinking unsaturated carboxylic acid monomers and acrylamide monomers, and a second network structure of the double-network hydrogel is obtained by crosslinking carboxymethyl cellulose. The thermoelectric conversion material provided by the invention is ionic dual-network hydrogel, has thermosensitivity and high Seebeck coefficient, and is high in thermoelectric conversion efficiency; a thermoelectric conversion device assembled with a polyaniline/carbon cloth electrode is excellent in energy storage performance, the specific are