Isaac Scientific Publishing

Journal of Advances in Nanomaterials

Nanocrystalline Porous Thin Film VNx Hydrogen Absorbents: Method of Production, Structure and Properties

Download PDF (1198.8 KB) PP. 1 - 10 Pub. Date: September 12, 2016

DOI: 10.22606/jan.2016.11001

Author(s)

  • Alexey Guglya1*, Alexander Kalchenko1, Elena Solopikhina1, Viktor Vlasov1 and Elena Lyubchenko2*
    1National Science Center “Kharkov Institute of Physics and Technology”, Kharkov, Ukraine
    2 National Technical University «Kharkov Polytechnic Institute”, Kharkov, Ukraine

Abstract

Vanadium and its alloy-based hydrides are extensively studied with regard to their use as hydrogen absorbents. The ion beam-assisted deposition method (IBAD) used for nanocrystalline VNx- Hy thin-film hydrogen storages production is analyzed. The data of transmission and scanning electron microscopic studies of all stages of the film formation are considered. The main mechanisms of intergranular pores formation in nanograin structures have been established. The relation between the parameters of the ion beam-assisted deposition and those of film structure has been shown. The obtained data provide the explanation of the mechanisms of hydrogen absorption and desorption by thin films. It was suggested that the availability of branched network of intergranular pores allows accumulating the hydrogen by VNx-Hy nano structures in large quantities and release it at the temperatures less than 275°C.

Keywords

Nanocrystalline structures; hydrogen; storage; thin films; ion-beam assisted deposition.

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