▎ 摘　　要

NOVELTY - The preparation method involves preparing a graphene cathode pole piece. A polycyclic aromatic hydrocarbon and a film-forming additive are dissolved in a non-proton polar solvent. Excess metal sodium is added to make the polycyclic aromatic hydrocarbon to react completely to generate polycyclic aromatic hydrocarbon sodium. The graphene cathode pole piece is soaked in the non-proton polar solvent to wash the graphene cathode pole piece soaked in the solution for multiple times to obtain a pre-sod graphene anode pole piece. The non-proton polar solvent is selected from a group consisting of hydrogen. USE - Method for preparing a pre-sodiated graphene anode pole piece. ADVANTAGE - The application preforms a layer of electron-insulated, ionic conductive and insoluble surface solid electrolyte interphase (SEI) film on a graphene anode pole piece, which can work cooperatively with the SEI film generated by the cycle of battery, thus better protecting the anode of the sodium-ion battery, and improving each performance of the sodium-ion battery. The method is simple and safe, and easy to implement and not easy to generate by-products. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a sodium ion battery has the cathode sheet in the pre-sodiated graphene anode pole piece. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the method.