▎ 摘　　要

NOVELTY - The preparation method of molybdenum selenide/graphene/carbon nanotube composite material involves (i) dispersing graphene oxide and acidified carbon nanotubes in water, mixing with aqueous dispersion, stirring uniformly, (ii) quenching graphene/carbon nanotube mixed dispersion with liquid nitrogen, and freeze-drying to obtain a graphene oxide/acidified carbon nanotube aerogel, (iii) carbonizing to obtain graphene/carbon nanotube aerogel, (iv) dissolving selenium powder in hydrazine hydrate, heating, stirring, and dispersing uniformly to obtain a selenium powder dispersion liquid. USE - Preparation of molybdenum selenide/graphene/carbon nanotube composite material used as high-performance electrocatalytic material, and electrode material for lithium ion battery and solar cell (all claimed). ADVANTAGE - The method enables the preparation of molybdenum selenide/graphene/carbon nanotube composite material having excellent chemical stability and mechanical property, and high specific surface area, and conductivity. DETAILED DESCRIPTION - The preparation method of molybdenum selenide/graphene/carbon nanotube composite material involves (i) dispersing graphene oxide and acidified carbon nanotubes in water, mixing with aqueous dispersion, stirring uniformly, (ii) quenching the graphene/carbon nanotube mixed dispersion with liquid nitrogen, and freeze-drying to obtain a graphene oxide/acidified carbon nanotube aerogel, (iii) carbonizing the graphene oxide/carbon nanotube aerogel at high temperature in an inert atmosphere to obtain graphene/carbon nanotube aerogel, (iv) dissolving selenium powder in hydrazine hydrate, heating, stirring, and dispersing uniformly to obtain a selenium powder dispersion liquid, (v) adding sodium molybdate to N,N-dimethylformamide, adding selenium powder dispersion to obtain mixture (a), (vi) immersing the graphene/carbon nanotube aerogel in mixture (a), solvothermally reacting to obtain molybdenum selenide/graphene/carbon nanotube composite material, and (vii) heat-treating in high purity nitrogen atmosphere.