▎ 摘　　要

NOVELTY - Composite nanomaterial comprises graphene nanoplate and molybdenum disulfide nanomaterial in mass ratio of 1:2-4:1. USE - The composite nanomaterial is useful as electrochemical storage material of lithium and electrochemical storage electrode material of magnesium. ADVANTAGE - The method is performed under mild condition and enables simple production of composite nanomaterial. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for synthesizing the composite nanomaterial, which involves (a) preparing oxidized graphite nanoplate by dispersing graphite powder (0.01-0.08 g) in concentrated sulfuric acid (20-25 ml) at 0 degrees C ice bath, adding potassium permanganate (3-4 times of the graphite) to the mixture, stirring the mixture for 30-60 minutes, warming the mixture to 30-35 degrees C, adding deionized water (40-50 ml) to the warmed mixture, stirring the mixture for 20-30 minutes, adding 30% hydrogen peroxide (10-15 ml) to the mixture, stirring the mixture for 5-20 minutes, separating the product centrifugally, and washing the product using 5% hydrochloric acid solution, deionized water and acetone to the product repeatedly to obtain oxidized graphite nanoplate, and (b) dissolving molybdate to deionized water to obtain solution (0.02-0.08 M), adding thioamide or thiourea as sulfur source and reducing agent to the obtained solution, where the mass ratio of the thioamide or thiourea to molybdate is 5:1-12:1, adding the oxidized graphite nanoplate to the obtained solution, where the mass ratio of the graphene nanoplate to molybdenum disulfide nanomaterial is 1:2-4:1, subjecting the mixture to ultrasonic treatment for 1-2 hours, fully dispersing the oxidized graphite nanoplate to the hydrothermal reaction solution, transferring the mixture to the hydrothermal reaction kettle with polytetrafluoroethylene lining, sealing the reaction kettle, reacting the mixture at 220-260 degrees C for 20-36 hours, separating the product centrifugally, and washing and drying the product using deionized water and absolute ethyl alcohol to obtain the composite nanomaterial.