Graphene battery negative electrode material and preparation method thereof

The invention relates to a graphene battery negative electrode material and a preparation method thereof, and belongs to the technical field of battery negative electrode materials, and the preparation method comprises the following steps: adding an auxiliary agent and alkyl siloxane into a polytetrafluoroethylene emulsion, and stirring to obtain a binder; adding three-dimensional graphene, barium sulfate, an organic additive and lead powder into an ethanol water solution, stirring, adding an adhesive, continuously stirring to obtain slurry, and performing spray drying to obtain powder; dispersing fibers in deionized water to obtain dispersion liquid, adding the dispersion liquid and the powder into a paste mixer, stirring, adding 45-51 wt% of sulfuric acid solution, and continuously stirring to obtain lead paste; coating the lead paste on a lead-acid battery grid, and drying to obtain a graphene battery negative electrode material; according to the invention, the three-dimensional graphene is selected as a c