▎ 摘　　要

NOVELTY - A foldable paper-based micro supercapacitor preparing method involves preparing a graphene oxide solution by a chemical oxidation stripping method, adding the anhydrous ethanol into the graphene oxide solution, and placing the mixed solution of the both on the liquid nitrogen surface for freezing, and performing vacuum freeze-drying to obtain a graphene oxide foam. The graphene oxide foam is heated, followed by preparing the metal template of an electrode pattern based on an interdigitated structure prepared by laser etching, placing the metal template on the paper, placing the reduced graphene oxide foam on the metal template and covering the electrode pattern based on the interdigitated structure on the metal template, and applying a pressure of 20-30 MPa to the reduced graphene oxide foam, maintaining the pressure for 3-10 minutes, dropping the solid electrolyte solution onto the graphene electrode based on the interdigitated paper and curing to obtain the finished product. USE - Method for preparing foldable paper-based micro supercapacitor. ADVANTAGE - The method enables preparing foldable paper-based micro supercapacitor with high operability, and better flexibility and foldability, in simple and cost effective manner. DETAILED DESCRIPTION - A foldable paper-based micro supercapacitor preparing method involves preparing a graphene oxide solution by a chemical oxidation stripping method, adding the anhydrous ethanol into the graphene oxide solution, and placing the mixed solution of the both on the liquid nitrogen surface for freezing, and performing vacuum freeze-drying under argon atmosphere to obtain a graphene oxide foam. The graphene oxide foam is first heated to 200-300 degrees C for 30-90 minutes, and heated to 800-1100 degrees C for 1-3 hours, followed by preparing the metal template of an electrode pattern based on an interdigitated structure prepared by laser etching, placing the metal template on the paper, placing the reduced graphene oxide foam on the metal template and covering the electrode pattern based on the interdigitated structure on the metal template, and applying a pressure of 20-30 MPa to the reduced graphene oxide foam, maintaining the pressure for 3-10 minutes, dropping the solid electrolyte solution onto the graphene electrode based on the interdigitated paper, where the solid electrolyte solution is mixed solution of polyvinyl alcohol, concentrated sulfuric acid and water and/or mixed solution of polyvinyl alcohol, lithium chloride and water, and curing at 30-40 degrees C for 2-5 hours to obtain the finished product.