▎ 摘　　要

NOVELTY - Preparing Mn-based heterogeneous compound/carbon composite material having a confinement structure comprises (1) adding 0.1-0.5 g graphite oxide into a 150 ml solvent, and performing ultrasonic dispersion to obtain a graphene oxide dispersion, (2) adding glucose into the graphene oxide dispersion prepared in step (1) and fully dissolving to obtain a mixed solution, (3) sequentially adding manganese acetate and ammonium bicarbonate having a molar ratio of 1: 1 to the mixed solution prepared in step (2), and 0.14 g hexadecyl trimethyl ammonium bromide, and performing ultrasonic treatment until the components are fully dissolved, where the concentration of manganese ions is 0.05-0.1 mol/l, (4) placing the solution prepared in step (3) into a polytetrafluoroethylene lining autoclave for solvothermal reaction, reacting at 120-200°C for 8-16 hours. USE - The manganese-based heterogeneous compound/carbon composite material with the confinement structure is used for the negative electrode of the lithium ion battery. DETAILED DESCRIPTION - Preparing Mn-based heterogeneous compound/carbon composite material having a confinement structure comprises (1) adding 0.1-0.5 g graphite oxide into a 150 ml solvent, and performing ultrasonic dispersion to obtain a graphene oxide dispersion, (2) adding glucose into the graphene oxide dispersion prepared in step (1) and fully dissolving to obtain a mixed solution, (3) sequentially adding manganese acetate and ammonium bicarbonate having a molar ratio of 1: 1 to the mixed solution prepared in step (2), and 0.14 g hexadecyl trimethyl ammonium bromide, and performing ultrasonic treatment until the components are fully dissolved, where the concentration of manganese ions is 0.05-0.1 mol/l, (4) placing the solution prepared in step (3) into a polytetrafluoroethylene lining autoclave for solvothermal reaction, reacting at 120-200°C for 8-16 hours, and after the reaction is completed, centrifugally separating the solid product for washing and drying to obtain a MnCO3/PF/GO precursor, (5) placing MnCO3/PF/GO precursor in a tubular furnace, heating to 700°C at a heating rate of 3-5° C/minutes under an inert atmosphere, calcining at 700°C for 4-6 hours and cooling to room temperature after calcination is completed to obtain an MnO/C/rGO composite material, and using the obtained MnO/C/rGO composite material prepared in step (5), loading into a porcelain boat, the porcelain boat is placed in a tubular furnace, heated to 300-500°C at a heating rate of 3-5° C/minutes under a mixed atmosphere of hydrogen and argon, maintained for 2-5 hours for vulcanization or selenization treatment and cooling to room temperature to obtain the MnO/N/C/rGO composite material, i.e. the Mn-based heterogeneous compound/carbon composite material, R being S or Se.