▎ 摘　　要

NOVELTY - Preparing flexible symmetric supercapacitor based on Prussian blue involves preparing graphene oxide by the conventional modified Hummers method, synthesizing cobalt hexacyanoferrate nanoparticles by conventional self-coordination method, dispersing 0.1g of graphene oxide in 70ml of distilled water. Cobalt hexacyanoferrate nanoparticles with different masses are added to the graphene oxide dispersion obtained. After vigorously stirring at 60 degrees C for 2 hours, the mixture is transferred to an autoclave for hydrothermal reaction. After the autoclave is naturally cooled to room temperature, the products are separated, dried at 50 degrees C, and then ground into powder to obtain cobalt hexacyanoferrate/graphene oxide. The polyethylene film is used as substrate and foamed nickel as the current collector. The cobalt hexacyanoferrate/graphene oxide, carbon black and polytetrafluoroethylene powder. USE - Method for preparing flexible symmetric supercapacitor based on Prussian blue. ADVANTAGE - The method enables to prepare flexible symmetric supercapacitor based on Prussian blue with excellent energy storage performance. DETAILED DESCRIPTION - Preparing flexible symmetric supercapacitor based on Prussian blue involves preparing graphene oxide by the conventional modified Hummers method, synthesizing cobalt hexacyanoferrate nanoparticles by conventional self-coordination method, dispersing 0.1g of graphene oxide in 70ml of distilled water. Cobalt hexacyanoferrate nanoparticles with different masses are added to the graphene oxide dispersion obtained. After vigorously stirring at 60 degrees C for 2 hours, the mixture is transferred to an autoclave for hydrothermal reaction. After the autoclave is naturally cooled to room temperature, the products are separated, dried at 50 degrees C, and then ground into powder to obtain cobalt hexacyanoferrate/graphene oxide. The polyethylene film is used as substrate and foamed nickel as the current collector. The cobalt hexacyanoferrate/graphene oxide, carbon black and polytetrafluoroethylene powder. The battery diaphragm is used as the diaphragm to separate the anode and the anode, and polyvinyl alcohol/sodium sulfate is used as the electrolyte to prepare a Prussian blue-based all-solid flexible symmetrical supercapacitor cobalt hexacyanoferrate /graphene oxide/NF//cobalt hexacyanoferrate/graphene oxide/NF.