Improved electrochemical properties of Co-P hydrogen storage material via doping with TiO2 nanotubes, nanofibers and nanoparticles prepared by different methods

Abstract

The TiO2 nanotubes, TiO2 nanofibers and TiO2 nanoparticles with different structures and morphologies are prepared by hydrothermal and electrospinning methods. Co-P material is manufactured by mechanical alloying. Ball milling is applied to fabricate various TiO2 active components modified Co-P composites. Ultimately, the composite electrodes exhibit higher discharge capacities than the ordinary Co-P, Co-P + TiO2-NT shows the highest discharge capacity (602.4 mAh/g) and preferable HRD and kinetic properties. The TiO2-NT with distinctive tubular porous structure and large specific surface area can offer sufficient reactive sites and fast channels for charge transfer, thus further accelerate the hydrogen diffusion.