Volume 151, 2011
From the journal:

Faraday Discussions

The effect of complex halides and binary halides on hydrogen release for the 2LiBH4:1MgH2 system

Zhuxian Yang,*ac   David M. Grant,b   Ping Wangc  and  Gavin S. Walker*a  

* Corresponding authors

a Energy and Sustainability Research Division, Faculty of Engineering, University of Nottingham, Nottingham, UK

b Materials Mechanics and Structures Division, Faculty of Engineering, University of Nottingham, Nottingham, UK

c Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China

Abstract

Due to the high hydrogen capacity of LiBH4, various strategies have been investigated to improve the hydrogen release properties of LiBH4. Theoretical calculations suggest that doping LiBH4 with F−/Cl− anions may generate lattice substitutions (such as the formation of LiBH3F or LiBH2F2), which will lower the hydrogen release temperature from LiBH4. The effect of addition of F−/Cl− containing dopants (viz. LiBF4, NH4F, LiAlCl4 and NH4Cl) on the hydrogen release from 2LiBH4:1MgH2 was investigated and LiBF4 was found to be the most effective among the dopants studied. Furthermore, the combined effect of LiBF4 and the catalyst precursor NbF5 was studied on the hydrogen release from 2LiBH4:1MgH2. It was found that the hydrogen release temperature for the LiBH4 and MgH2 components were substantially reduced by 55 °C and 112 °C respectively by the combined doping and catalytic effect from LiBF4 and NbF5. This sample was partially rehydrogenated under 400 °C and 100 bar, and upon cycling the hydrogen release temperature was lowered further for the LiBH4 component but increased for the MgH2 component.

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Article information

DOI
https://doi.org/10.1039/C0FD00026D
Article type
Paper
Submitted
17 Dec 2010
Accepted
25 Jan 2011
First published
18 May 2011

Faraday Discuss., 2011,151, 133-141

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The effect of complex halides and binary halides on hydrogen release for the 2LiBH4:1MgH2 system

Z. Yang, D. M. Grant, P. Wang and G. S. Walker, Faraday Discuss., 2011, 151, 133 DOI: 10.1039/C0FD00026D

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