Lithium ion batteries cathode material: V2O5

Among all the known electrode materials, vanadium pentoxide (V 2 O 5 ) has high reversible capacity. It is a very valuable material for research of the complexity, rich structure and morphology. However, it also has some disadvantages, such as poor cycle stability, low discharge voltage, low conductivity and Li + diffusion coefficient. In this regard, researchers have carried out a lot of research, such as using various methods to improve the nanostructures, introducing heterostructures, introducing point defects or cation doping in the crystal structure, etc. The electrochemical performance of V 2 O 5 has been significantly improved in reversible capacity, high-rate capacity and long-term cycle stability. In this paper, V 2 O 5 based nanostructure with different chemical composition are briefly introduced, and it covers V 2 O 5 nanomaterials with different morphology, including 1D nanorods, nanobelts, nanotubes, 2D leaf like nanosheets and other nanosheets, and 3D hollow structures, porous nanostructures, porous eggshell microsphere structures. The composite nanomaterials of V 2 O 5 and different carbonaceous supports are also introduced. Finally, the V 2 O 5 composite materials doped with cations are discussed. The electrochemical performance of V 2 O 5 based electrode can be improved effectively by obtaining appropriate nanostructure and optimized chemical composition.