Institute of Physics of Materials AS CR, v. v. i. > Projects > Desorption kinetics of hydrogen in Mg2Ni-H intermetallic modified by chosen interstitials

Desorption kinetics of hydrogen in Mg2Ni-H intermetallic modified by chosen interstitials

Number of Project106/09/0814
AgencyGrantová agentura České republiky
Duration2008-12-31 - 2010-12-30

Anotace
Hydrogen is a very prospective fuel both for direct combustion and in electrochemical batteries and fuel cells. One of principal problems by Mg-Ni - based hydrogen storage alloys is to decrease desorption temperature in order to enable the hydrogen charging/decharging cycle at lower temperatures. The goal of the project is to investigate influence of alloying Mg2Ni compound by small atoms (Be, B and C) that incorporate the structure of the compound as interstitials. They restrict the number of waysthe hydrogen can occupy in the lattice. It is evident that this constraint would influence the stability of the hydride, and, hence the desorption temperature. Since hydrogen does not occupy all the interstitial positions in Mg2NiH4, it can be expected that the alloying with planned elements might not decrease substantially the hydrogen sorption capacity of the hydride, which is highly desirable. Present project will prove the idea.


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