▎ 摘　　要

NOVELTY - Simple metal-doped cathode material comprises silicon oxide outer is coated with a first modified carbon layer. The first modified carbon layer is coated with the second modified carbon layer, and the first modified carbon layer comprises metal active materials and conductive carbon. The second modified carbon layer contains active pre-lithium agent and conductive carbon, where the active pre-lithium agent reacts with silicon oxide to form a layer of lithium metasilicate on the surface, together with the first modified carbon layer and the second modified carbon layer and constructing a multi-level cladding layer on the silicon oxide surface. USE - Used as simple metal-doped cathode material. ADVANTAGE - The simple metal-doped cathode material: can inhibit the generation of irreversible substances during charge and discharge, improve the first effect, buffer the volume expansion during the charging and discharging process of silicon oxygen, structural stability and electrochemical activity of the material thus forms a dense interface; and has strong water resistance, stable structure, high capacity, high coulombic efficacy and stable cycle. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing simple metal-doped cathode material using acid comprising citric acid, acetic acid, hydrochloric acid, sulfuric acid or phytic acid, the carbon source A comprising at least one of chitosan, glucose, sucrose, polyvinyl alcohol, polyvinylpyrrolidone and/or sodium alginate, the conductive carbon comprising carbon nanotubes, graphene or conductive fibers, the solvent comprising ethanol, methanol, ethylene glycol, ethyl acetate or nitrogen-nitrogen dimethylformamide, the metal salt M is chloride, nitrate, citrate or acetate of iron, cobalt, nickel, magnesium, calcium or zinc, the carbon source F comprising phenolic resin, acrylic resin, polyethylene glycol, polyvinylpyrrolidone, cellulose, polystyrene, citric acid or stearic acid and the active pre-lithium agent solution comprises a tetrahydrofuran solution of lithium hexamethyldisilazide, lithium tri-sec-butyl borohydride or lithium triethylborohydride.