▎ 摘　　要

NOVELTY - Preparing nitrogen-doped three-dimensional porous graphene hydrogel electrode material involves dropping hydrogen peroxide aqueous solution dropwise to graphene oxide aqueous suspension solution, stirring uniformly, adding urea, and stirring uniformly to obtain homogeneous aqueous solution. The uniform aqueous solution is hydrothermally reacted to obtain hydrogel, and hydrogel is freeze-dried to obtain nitrogen-doped three-dimensional porous graphene hydrogel electrode material. USE - Method for preparing nitrogen-doped three-dimensional porous graphene hydrogel electrode material for use in electrode for water desalination treatment (all claimed), preparation technology field of graphene super capacitor electrode material, reverse osmosis (RO), electrodialysis (EDI) and multi-stage Flash (RTM: Computer multimedia application) (MSF). ADVANTAGE - The method simple, and electrochemical performance of the electrode material is excellent, enables to prepare nitrogen-doped three-dimensional porous graphene hydrogel electrode material that has large specific capacitance, has wide application prospect in sewage treatment field, concentration of the hydrogen peroxide used in the method is very low, greatly reduces safety trouble and environment pollution in the industrial process, electrode has simple operation and low cost, and electrode material has high desalting efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an electrode, which comprises nitrogen-doped three-dimensional porous graphene hydrogel electrode material.