Desorption Kinetics of Hydrogen in Mg2NiH4 Hydride and in Hydrogeneated Eutectic (Mg/Mg2Ni)Hx

Abstract:

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Mg-Ni alloys are perspective hydrogen-storage materials. In the present work, kinetics of hydrogen desorption was studied in Mg2NiH4 hydride and in hydrogenated eutectic (Mg/Mg2Ni)Hx. Time dependence of desorbed hydrogen was measured in temperature interval 552 –723 K and hydrogen diffusion coefficients were evaluated from obtained desorption curves. Results were interpreted in relation to phase composition investigated parallel by XRD. It was found that microtwinned low-temperature phase LT2 slows-down considerably the hydrogen desorption rate.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 283-286)

Edited by:

Prof. Andreas Öchsner, Prof. Graeme E. Murch and Ali Shokuhfar

Pages:

639-648

DOI:

10.4028/www.scientific.net/DDF.283-286.639

Citation:

J. Cermak and L. Kral, "Desorption Kinetics of Hydrogen in Mg2NiH4 Hydride and in Hydrogeneated Eutectic (Mg/Mg2Ni)Hx ", Defect and Diffusion Forum, Vols. 283-286, pp. 639-648, 2009

Online since:

March 2009

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$38.00

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