▎ 摘　　要

NOVELTY - Preparation of graphene/ferrite nanocomposite electrode material by dissolving iron salts and other metal salts in deionized water, stirring to dissolve uniformly to obtain mixed salt solution, mixing mixed salt solution with graphene, and stirring to obtain first dispersion; dissolving polyvinyl alcohol and oxalic acid in deionized water, heating, and stirring to obtain mixed solution of polyvinyl alcohol and oxalic acid, adding mixed solution to first dispersion, stirring, and ultrasonicating to obtain second dispersion; and transferring second dispersion into reaction vessel. USE - Method for preparing graphene/ferrite nanocomposite electrode material (claimed). ADVANTAGE - The electrode material has large specific surface, good mechanical performance, excellent electrochemical property and cyclical stability, and excellent absorbing performance. The method produces large-area electrode film, applies to capacitive deionization, and super capacitor technical field, and provides technical support for industrial production. DETAILED DESCRIPTION - Preparation of graphene/ferrite nanocomposite electrode material comprises dissolving iron salts and other metal salts in deionized water, stirring to dissolve uniformly to obtain mixed salt solution, mixing mixed salt solution with graphene, and stirring to obtain first dispersion at iron salt to other metal salts molar ratio of 1.5-2.5:1 and graphene to other metal salts mass ratio of 1.5-2.5:1; dissolving polyvinyl alcohol and oxalic acid at mass ratio of 1:5-10 in deionized water, heating, and stirring to obtain mixed solution of polyvinyl alcohol and oxalic acid, adding mixed solution to first dispersion, stirring, and ultrasonicating to obtain second dispersion; transferring second dispersion into reaction vessel for hydrothermal reaction, centrifuging, drying, calcining at protective atmosphere, and grinding to obtain graphene/ferrite nanocomposites; dispersing activated carbon, carbon nanotubes, carbon black and graphene/ferrite nanocomposites in deionized water or ethanol solution at mass ratio of 1:8:0.5-1.5:0.5-1.5:0.5, ultrasonicating to obtain carbon material dispersion, dispersing PTFE concentrate in ethanol solution, stirring to obtain PTFE dispersion, adding carbon material dispersion, ultrasonicating, heating and stirring to obtain semi-solid slurry, and rolling semi-solid slurry on roll press to obtain graphene/ferrite nanocomposite electrode material.