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Hydrogen sorption properties of MgH2-LiBH4 composites

Boesenberg, Ulrike; Doppiu, Stefania; Mosegaard, Lene; Barkhordarian, Gagik; Eigen, Nico; Borgschulte, Andreas; Jensen, Torbert R.; Cerenius, Yngve LU ; Gutfleisch, Oliver and Klassen, Thomas, et al. (2007) In Acta Materialia 55(11). p.3951-3958
Abstract
A detailed analysis of the reaction mechanism of the reactive hydride composite (RHC) MgH2 + 2LiBH(4) <-> MgB2 + 2LiH + 4H(2) was performed using high-pressure differential scanning calorimetry (HP-DSC) measurements and in situ synchrotron powder X-ray diffraction (XRD) measurements along with kinetic investigations using a Sievert-type apparatus. For the desorption the following two-step reaction has been observed: MgH2 + 2LiBH(4) <-> Mg + 2LiBH(4) + H-2 <-> MgB2 + 2LiH + 4H(2). However, this reaction is kinetically restricted and proceeds only at elevated temperatures. In contrast to the desorption reaction, LiBH4 and MgH2 are found to form simultaneously under fairly moderate conditions of 50 bar hydrogen pressure in... (More)
A detailed analysis of the reaction mechanism of the reactive hydride composite (RHC) MgH2 + 2LiBH(4) <-> MgB2 + 2LiH + 4H(2) was performed using high-pressure differential scanning calorimetry (HP-DSC) measurements and in situ synchrotron powder X-ray diffraction (XRD) measurements along with kinetic investigations using a Sievert-type apparatus. For the desorption the following two-step reaction has been observed: MgH2 + 2LiBH(4) <-> Mg + 2LiBH(4) + H-2 <-> MgB2 + 2LiH + 4H(2). However, this reaction is kinetically restricted and proceeds only at elevated temperatures. In contrast to the desorption reaction, LiBH4 and MgH2 are found to form simultaneously under fairly moderate conditions of 50 bar hydrogen pressure in the temperature range of 250-300 degrees C. As found in pure light metal hydrides, significant improvement of sorption kinetics is possible if suitable additives are used. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. (Less)
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publication status
published
subject
keywords
hydrogen storage, synchrotron radiation, phase transformation, differential scanning calorimetry (DSC)
in
Acta Materialia
volume
55
issue
11
pages
3951 - 3958
publisher
Elsevier
external identifiers
  • wos:000247417700033
  • scopus:34248584622
ISSN
1873-2453
DOI
10.1016/j.actamat.2007.03.010
language
English
LU publication?
yes
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390d70a7-0f5f-41b3-8c62-227744a38031 (old id 648204)
date added to LUP
2007-12-10 15:33:33
date last changed
2018-07-15 03:36:16
@article{390d70a7-0f5f-41b3-8c62-227744a38031,
  abstract     = {A detailed analysis of the reaction mechanism of the reactive hydride composite (RHC) MgH2 + 2LiBH(4) &lt;-&gt; MgB2 + 2LiH + 4H(2) was performed using high-pressure differential scanning calorimetry (HP-DSC) measurements and in situ synchrotron powder X-ray diffraction (XRD) measurements along with kinetic investigations using a Sievert-type apparatus. For the desorption the following two-step reaction has been observed: MgH2 + 2LiBH(4) &lt;-&gt; Mg + 2LiBH(4) + H-2 &lt;-&gt; MgB2 + 2LiH + 4H(2). However, this reaction is kinetically restricted and proceeds only at elevated temperatures. In contrast to the desorption reaction, LiBH4 and MgH2 are found to form simultaneously under fairly moderate conditions of 50 bar hydrogen pressure in the temperature range of 250-300 degrees C. As found in pure light metal hydrides, significant improvement of sorption kinetics is possible if suitable additives are used. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.},
  author       = {Boesenberg, Ulrike and Doppiu, Stefania and Mosegaard, Lene and Barkhordarian, Gagik and Eigen, Nico and Borgschulte, Andreas and Jensen, Torbert R. and Cerenius, Yngve and Gutfleisch, Oliver and Klassen, Thomas and Dornheim, Martin and Bormann, Ruediger},
  issn         = {1873-2453},
  keyword      = {hydrogen storage,synchrotron radiation,phase transformation,differential scanning calorimetry (DSC)},
  language     = {eng},
  number       = {11},
  pages        = {3951--3958},
  publisher    = {Elsevier},
  series       = {Acta Materialia},
  title        = {Hydrogen sorption properties of MgH2-LiBH4 composites},
  url          = {http://dx.doi.org/10.1016/j.actamat.2007.03.010},
  volume       = {55},
  year         = {2007},
}