Microstructure and Properties of the Vanadium Based Hydrogen Storage Battery Anode Material Modified with Graphene

The vanadium based hydrogen storage battery anode material modified with graphene was prepared by the method of sintering after ball milling,and the phase composition,microstructure,hydrogen absorption and desorption properties,and cycling stability of the anode material were tested and analyzed.The results show that the material is composed of vanadium-based solid solution as main phase,Ti Ni phase with three-dimensional network structure and graphene with diffuse distribution,having better hydrogen absorption and desorption properties and cycling stability.Compared with V₃TiNi_0.56 prepared by the same method,the maximum hydrogen adsorption of this material could increase by 16.4% with comparative hydrogen platform pressure and its decay rate of discharge capacity after 20 times of charge and discharge cycles could decrease from 92.8% to 6.7%.