Water-based magnesium ion positive electrode material nickel oxyhydroxide/carbon nanotube compound, and preparation method and application of water-based magnesium ion positive electrode material nickel oxyhydroxide/carbon nanotube compound

The invention provides an aqueous magnesium ion positive electrode material nickel oxyhydroxide/carbon nanotube compound and a preparation method and application thereof, and is characterized in that a carbon nanotube is used as a substrate, and nickel oxyhydroxide particles are grown on the surface of the carbon nanotube by a chemical bath method to prepare the nickel oxyhydroxide/carbon nanotube compound. According to the technical scheme, the nickel oxyhydroxide nanoparticles are synthesized on the surface of the carbon nano tube through a simple chemical bath method, so that the nickel oxyhydroxide nanoparticles are deposited on the surface of the carbon nano tube to form the compound with the nickel oxyhydroxide/carbon nano tube structure, and the compound is used as the positive electrode material of the aqueous magnesium ion battery. The water-based magnesium ion battery shows excellent electrochemical performance, and especially has excellent cycling stability and excellent magnesium ion storage capac