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Metal Oxide Modified Lithium Borohydrides for Reversible Hydrogen Storage

Published online by Cambridge University Press:  01 February 2011

Ming Au and
Arthur Jurgensen
Ming Au*
Affiliation:
ming.au@srnl.doe.gov, xxx, xxx, xxxx, xxx, xxx, Bangladesh
Arthur Jurgensen
Affiliation:
Savannah River National Laboratory, Aiken, SC 29808, USA
*
** Corresponding author: (T)803-819-8442, (F)803-819-8432, ming.au@srnl.doe.gov
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Abstract

The lithium borohydride has been modified by ball milling with metal oxides and metal chlorides as the additives. The modified lithium borohydrides released 9 wt% hydrogen starting from 473K. The dehydrided modified lithium borohydrides absorbed 7-9 wt% hydrogen at 873K and 7 MPa. The modification with additives reduced the dehydriding starting temperature from 673K to 473K and moderated the rehydrogenation conditions from 923K/15 MPa to 873K/7 MPa. XRD and SEM analysis revealed the formation of the intermediate compound that may play a key role in changing the reaction path resulting in the lower dehydriding temperature and reversibility. The additives reduced the dehydriding temperature and improve the reversibility, but it also reduced the hydrogen storage capacity.

Keywords

hydrogenationabsorptionenergy-storage

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References

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