▎ 摘　　要

NOVELTY - A flexible counter electrode preparing method involves dispersing the nano-metal particles in the aqueous graphene oxide solution, stirring and mixing evenly. The graphene oxide nano-particle-loaded graphene aqueous solution is reduced into a graphene composite hydrogel uniformly supporting the nano-metal particles. The resulting composite hydrogel is immersed in a methanol solution containing a polysulfide electrolyte to form a uniformly loaded metal sulfide composite graphene hydrogel followed by pressing metal sulfide composite graphene hydrogel onto substrate, pressing and drying. USE - Method for preparing flexible counter electrode that is utilized in quantum dot sensitized solar battery composite material. ADVANTAGE - The method enables preparing flexible counter electrode with high photoelectric conversion performance and stability. DETAILED DESCRIPTION - A flexible counter electrode preparing method involves dispersing the nano-metal particles in the aqueous graphene oxide solution, stirring and mixing evenly. The graphene oxide nano-particle-loaded graphene aqueous solution is reduced into a graphene composite hydrogel uniformly supporting the nano-metal particles. The resulting composite hydrogel is immersed in a methanol solution containing a polysulfide electrolyte to form a uniformly loaded metal sulfide composite graphene hydrogel followed by pressing metal sulfide composite graphene hydrogel onto the flexible titanium mesh substrate by a tablet pressing method, pressing and drying to obtain product.