▎ 摘　　要

NOVELTY - Preparation of graphene hydrogel involves dissolving 1,4-phenyldithiol in deionized water, adding 1 mol/L sodium hydroxide solution, heating and dissolving to obtain solution (A), dissolving sodium molybdate in 98% concentrated sulfuric acid to obtain solution (B), slowly dripping solution (B) in solution (A), uniformly stirring, ultrasonically processing to obtain a mixed solution, mixing the mixed solution with graphene oxide dispersion liquid, and leaving still. The mass-volume ratio of sodium molybdate and concentrated sulfuric acid is 3 g:20 ml. The mass-volume ratio of 1,4-phenyldithiol, deionized water and sodium hydroxide solution is 2 g:20 ml:20 ml. USE - Preparation of graphene hydrogel for supercapacitor electrode. ADVANTAGE - The method is simple, energy-saving, easy, safe, efficient, requires simple stirring, uses wide raw material sources, eliminates freeze-drying step, provides graphene hydrogel having elasticity and mechanical strength, and ensures high performance of the electrode.