▎ 摘　　要

NOVELTY - Preparing metal manganese oxide/graphene composite electrode material comprises preparing of manganese(II,III) oxide nanotubes, and silicon dioxide nanospheres, adding the manganese(II,III) oxide nanotubes the silicon dioxide nanospheres, sodium chloride and glucose into the aqueous solution, and then putting them in an ultrasonic oscillator for 15 minutes to obtain a uniform suspension liquid. The suspension is transferred to a constant temperature water bath at 80 degrees C, and stirring is continued at this temperature until a sol is formed. The sol is put in an oven for drying at 100 degrees C, for 3h, and portion of the moisture is removed. The obtained precursor is heated in a tube furnace filled with nitrogen at 600 degrees C for 3 hours. The obtained sample is added to 2mol sodium hydroxide solution, and stirred overnight in a constant temperature water bath at 50 degrees C to remove the silicon dioxide and sodium chloride dual template. USE - Method for preparing metal manganese oxide/graphene composite electrode material. ADVANTAGE - The method enables to prepare metal manganese oxide/graphene composite electrode material, which optimize the reversible capacity of the battery and other electrochemical performance. DETAILED DESCRIPTION - Preparing metal manganese oxide/graphene composite electrode material comprises preparing of manganese(II,III) oxide nanotubes, and silicon dioxide nanospheres, adding the manganese(II,III) oxide nanotubes the silicon dioxide nanospheres, sodium chloride and glucose into the aqueous solution, and then putting them in an ultrasonic oscillator for 15 minutes to obtain a uniform suspension liquid. The suspension is transferred to a constant temperature water bath at 80 degrees C, and stirring is continued at this temperature until a sol is formed. The sol is put in an oven for drying at 100 degrees C, for 3h, and portion of the moisture is removed. The obtained precursor is heated in a tube furnace filled with nitrogen at 600 degrees C for 3 hours. The obtained sample is added to 2mol sodium hydroxide solution, and stirred overnight in a constant temperature water bath at 50 degrees C to remove the silicon dioxide and sodium chloride dual template. The obtained product is put in a centrifuge with a rotation speed of 2400 and collected by centrifugation after for 10 minutes, the upper liquid is poured out in the centrifuge tube, a fixed amount of deionized water is added to centrifuge, and the process is repeated. The pH value of the obtained liquid is tested with test paper, and the adjustment is stopped when the pH value of the solution is 7. The solution is put into a vacuum oven and dried overnight at 60 degrees C to realize the preparation of the metal manganese oxide/graphene composite electrode material.