▎ 摘　　要

NOVELTY - Preparing tin(II) sulfide-tin oxide-graphene oxide (GO)-carbon heterostructure complex material comprises dissolving tin source and reducing acid in alcohol solvent, and completely dissolving tin source to obtain acidic solution as A liquid, obtaining graphene dispersion liquid as B liquid, obtaining ethylene glycol solution of sulfur source as C liquid, mixing A liquid and B liquid, adding surfactant, uniformly mixing to obtain D liquid, adding C liquid into D liquid, completely carrying out reaction between tin and sulphur, completely uniformly mixing, orderly performing hydrothermal reaction and filtering to obtain grey black precipitate, orderly washing and drying grey black precipitate, adding dried grey black precipitate into anhydrous ethanol solution of carbon source, uniformly mixing, carrying out secondary hydrothermal reaction for obtained mixture, filtering and drying to obtain black precipitate, and annealing black precipitate. USE - The method is useful for preparing tin(II) sulfide-tin oxide-GO-carbon heterostructure complex material, which is used as a cathode material for sodium ion batteries (claimed). ADVANTAGE - The material: has high specific energy and excellent electrochemical performance; and can meets the development requirements of high energy storage and long-life batteries. DETAILED DESCRIPTION - Preparing tin(II) sulfide-tin oxide-graphene oxide (GO)-carbon heterostructure complex material comprises dissolving tin source and reducing acid in alcohol solvent, and completely dissolving tin source to obtain acidic solution as A liquid, obtaining graphene dispersion liquid as B liquid, obtaining ethylene glycol solution of sulfur source as C liquid, mixing the A liquid and B liquid, adding surfactant, uniformly mixing to obtain D liquid, adding C liquid into D liquid, completely carrying out reaction between tin and sulphur, completely uniformly mixing, orderly performing hydrothermal reaction and filtering to obtain grey black precipitate, orderly washing and drying grey black precipitate, adding dried grey black precipitate into anhydrous ethanol solution of carbon source, uniformly mixing, carrying out secondary hydrothermal reaction for obtained mixture, filtering and drying to obtain black precipitate, and annealing black precipitate, where in the tin(II) sulfide-tin oxide-GO-carbon heterogeneous structure complex material, molar ratio of GO, tin, sulfur: carbon is 1:(0.8-1.2):1:1. An INDEPENDENT CLAIM is also included for a tin(II) sulfide-tin oxide-GO-carbon heterostructure complex material prepared by above mentioned method.