Preparation method of cellulose-polyvinyl alcohol composite film based on phase inversion and preparation method of supercapacitor

The invention discloses a preparation method of a cellulose-polyvinyl alcohol composite film based on phase inversion and a preparation method of a supercapacitor. The preparation method comprises thefollowing steps: preparing a cellulose solution from sodium hydroxide, urea and cellulose raw materials; mixing the cellulose solution and a polyvinyl alcohol solution in proportion to form a film toobtain a thin film, wherein cellulose in the thin film accounts for 10-25% of the solid content of the thin film; soaking and regenerating the film by using a mixed solution of calcium chloride and hydrochloric acid, then soaking and plasticizing the film by using glycerol, and finally drying to obtain the cellulose-polyvinyl alcohol composite film. The cellulose and -polyvinyl alcohol compositefilm is prepared by taking cellulose as a raw material and sodium hydroxide, urea and water as solvents and adopting a dissolution-regeneration and phase inversion method. Compared with a traditionalpolyolefin material, the com