Article
Version 1
Preserved in Portico This version is not peer-reviewed
Improvement in the Hydrogen Storage Properties of MgH2 by Adding NaAlH4
Version 1
: Received: 1 January 2024 / Approved: 3 January 2024 / Online: 3 January 2024 (07:45:59 CET)
A peer-reviewed article of this Preprint also exists.
Kwak, Y.-J.; Song, M.-Y.; Lee, K.-T. Improvement in the Hydrogen Storage Properties of MgH2 by Adding NaAlH4. Metals 2024, 14, 227. Kwak, Y.-J.; Song, M.-Y.; Lee, K.-T. Improvement in the Hydrogen Storage Properties of MgH2 by Adding NaAlH4. Metals 2024, 14, 227.
Abstract
Milled MgH2, NaAlH4, MgH2–10NaAlH4, MgH2–30NaAlH4, MgH2–50NaAlH4, and MgH2–2Ni-10NaAlH4 samples were prepared by milling in hydrogen atmosphere (reactive mechanical milling, RMM). Decomposition temperatures of milled MgH2, NaAlH4, MgH2–10NaAlH4, and MgH2–30NaAlH4 were examined in a Sieverts-type hydrogen-absorption and release apparatus, in which the hydrogen pressures were kept constant during hydrogen absorption or release. As the content of NaAlH4 in the sample increased, the temperature at the highest peak in the ratio of increase in Hr to increase in T, dHr/dT, versus T curve decreased. The higher content of NaAlH4 is believed to have made effects of reactive mechanical milling stronger. Effects of the NaAlH4 content on the temperatures of intermediate reactions were studied for MgH2 – NaAlH4 composites. Phase formation in the cycled MgH2–50NaAlH4 were investigated. The hydrogen-storage properties of MgH2–30NaAlH4 were compared with those of Mg-based alloys in which oxide, halides, or fluoride was added.
Keywords
hydrogen storage; MgH2; NaAlH4; decomposition temperature; hydrogen absorption; release rates
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment
