| abstract |
Provided is a ternary composite electrode material, comprising a substrate of nitrogen-phosphorus-doped porous carbon and graphene composite, and α-MnO 2 grown on the substrate in situ, and the α-MnO 2 grows vertically in a nanotube shape On the substrate, the α-MnO 2 is α-MnO 2 containing oxygen defects; the length of the α-MnO 2 is 1-2 μm, the diameter is 50-150 nm, and the wall thickness of the nanotube is 10-20 nm ; In terms of mass ratio, the nitrogen-phosphorus-doped porous carbon: graphene: α-MnO 2 is in mass ratio of 10:1:1740. The above materials are obtained by mixing potassium permanganate and hydrochloric acid according to a certain amount ratio, then adding a mixed solution of nitrogen and phosphorus doped porous carbon and graphene, and then reacting under hydrothermal conditions. The overall electrical conductivity of the electrode material obtained by the invention is effectively improved, which is beneficial to the rapid conduction of electrons in the material, and the cycle life is improved. |