▎ 摘　　要

NOVELTY - Preparing inorganic nonmetal composite material involves: (1) preparing strontium telluride nanomaterials by reacting strontium chloride and sodium tellurite under the action of nitrilotriacetic acid; (2) preparing modified strontium telluride nanomaterials by reacting potassium iodate with the strontium telluride nanomaterials under acidic conditions; and (3) doping and mixing nano-graphene with the modified strontium telluride nanomaterials. USE - The method is useful for preparing inorganic nonmetal composite material, which is useful for electrochemical energy storage (claimed). ADVANTAGE - The method provides inorganic nonmetal composite material, which can replace graphite as cathode material in lithium-ion battery, and has excellent charging and discharging rate, low temperature performance, and compatibility with electrolyte.