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The Potential of Binary Lithium Magnesium Nitride - LiMgN for Hydrogen Storage Application

Published online by Cambridge University Press:  01 February 2011

Jun Lu ,
Zhigang Zak Fang ,
Young Joon Choi  and
Hong Yong Sohn
Jun Lu
Affiliation:
jun.lu@utah.edu, University of Utah, Metallurgical Engineering, 135 South 1460 East Room 412, Salt Lake City UT 84112, USA, Salt Lake City, UT, 84112, United States, 001-801-581-3963, 001-801-581-4937
Zhigang Zak Fang
Affiliation:
zak.fang@utah.edu, University of Utah, Metallurgical Engineering, 135 South 1460 East Room 412, Salt Lake City, UT, 84112, United States
Young Joon Choi
Affiliation:
YoungJoon.Choi@utah.edu, University of Utah, Metallurgical Engineering, 135 South 1460 East Room 412, Salt Lake City, UT, 84112, United States
Hong Yong Sohn
Affiliation:
H.Y.Sohn@utah.edu, University of Utah, Metallurgical Engineering, 135 South 1460 East Room 412, Salt Lake City, UT, 84112, United States
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Abstract

Metal hydrides and amides are potential candidate materials for hydrogen storage. Lithium- and magnesium-based material systems are among the most promising materials owing to their high hydrogen contents. In the present work, we investigated hydrogenation/dehydrogenation reactions of a binary nitride, LiMgN. LiMgN can be formed by a reaction of MgH2 with LiNH2 in 1:1 ratio. The reaction also releases approximately ∼ 8.1 wt% H2 (theoretical value is 8.2 wt%) between 160 and 220 °C. The reaction product LiMgN can be rehydrogenated by reacting with H2 under 2000 psi of hydrogen pressure and 160 °C with small amount of TiCl3 doping. TGA results showed that about 8.0 wt% of hydrogen was stored in TiCl3-doped LiMgN during the hydrogenation process. The reversible hydrogenation and dehydrogenation mechanisms involving LiMgN and H2 are discussed.

Keywords

energy-storagehydrogenationnitride
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1042: Symposium S – Materials and Technology for Hydrogen Storage , 2007 , 1042-S05-03
Copyright
Copyright © Materials Research Society 2008

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