▎ 摘　　要

NOVELTY - A flexible supercapacitor electrode preparing method involves heating the sodium phytate solution to boiling, slowly adding the chloride, and placing the mixed solution in a constant temperature water bath at 60-90 degrees C for 0.5-3.0 hours to obtain a phytate solution, uniformly mixing the phytate solution and the graphene oxide dispersion, and sonicating at room temperature for 20-60 minutes to obtain a mixed solution of phytate and graphene oxide, placing above mixed solution in a 100 ml polytetrafluoroethylene reactor, and after cooling, and taking out to obtain a phytate-modified graphene hydrogel, taking a phytate-modified graphene hydrogel and pressing phytate-modified graphene hydrogel on a current collector, pressing at 10-20 MPa to obtain the finished product. USE - Method for preparing flexible supercapacitor electrode for field of flexible energy storage electronics. ADVANTAGE - The method enables preparing flexible supercapacitor electrode with high mechanical flexibility and electrochemical performance, and long cycle life.