Method for preparing polyionic liquid-based thermoelectric material

The invention discloses a method for preparing a polyionic liquid-based thermoelectric material, comprising the steps of mixing and grinding a polyionic liquid and a macromolecular sulfonic acid to obtain a sulfonic acid doped polyionic liquid; dissolving the sulfonic acid doped polyionic liquid in a phenol solvent and stirring the mixed solution to obtain a polyionic liquid solution; and adding ananocarbon material to the polyionic liquid solution, stirring and drying the mixture to obtain the polyionic liquid-based thermoelectric material. The method firstly improves the ordering degree ofthe molecular chains of the polyionic liquid by the interaction of the phenol solvent and the molecules of the polyionic liquid, and then, by combination with the nanocarbon material, achieves the ordered accumulation of the polyionic liquid molecules by means of the induction by the carbon nanotubes, and further enhances the ordering degree of molecular chains of the polyionic liquid to obtain the high-performance polyion