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The influence of alloy elements on the hydrogen storage properties in vanadium-based solid solution alloys
The effects of vanadium content and alloy elements (Mn and Ni) on the microstructure and hydrogen absorption/desorption properties in vanadium-based solid solution alloys were studied. The results showed that vanadium content had an obvious effect on hydrogen storage capacity. With the increase of v...
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Published in: | Journal of alloys and compounds 2008-05, Vol.455 (1), p.392-397 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The effects of vanadium content and alloy elements (Mn and Ni) on the microstructure and hydrogen absorption/desorption properties in vanadium-based solid solution alloys were studied. The results showed that vanadium content had an obvious effect on hydrogen storage capacity. With the increase of vanadium content from 5 to 10 to 35 to 77.8
at.%, the hydrogen absorption capacity increased gradually from 1.30 to 1.55 to 2.88 to 3.11
mass%, and the hydrogen desorption capacity first increased from 0.52 to 0.70 to 1.79
mass%, but then decreased to 1.34
mass%. The reversible hydrogen storage capacities in these alloys were 40, 45, 62 and 43%, respectively. Furthermore, with the increase of vanadium content the pressure plateau became more distinctive and shifted steadily to a lower pressure level. The kinetics of hydrogen absorption in these alloys was relatively quick except in the case of the 35% vanadium alloy, which could not reach equilibrium even after 90
min. A small quantity of alloy elements Mn and Ni was able to increase the pressure plateau in the 35% vanadium content alloy and the hydrogen absorption capacity in the 5% vanadium content alloy, respectively, but had little effect on the hydrogen absorption kinetics. The microstructures in these alloys were also examined in order to provide a reasonable explanation of the results discussed. |
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ISSN: | 0925-8388 1873-4669 |
DOI: | 10.1016/j.jallcom.2007.01.145 |