Journal of Advances in Nanomaterials

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

DOI: 10.22606/jan.2016.11001

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

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 VN_x- H_y 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 VN_x-H_y nano structures in large quantities and release it at the temperatures less than 275°C.

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

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