A NaAlH4-Ca(BH4)2 composite system for hydrogen storage

Moller, Kasper; Grinderslev, J.; Jensen, T.

doi:10.1016/j.jallcom.2017.05.264

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Authors

Moller, Kasper

Grinderslev, J.

Jensen, T.

Date

2017

Type

Journal Article

Metadata

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Citation

Moller, K. and Grinderslev, J. and Jensen, T. 2017. A NaAlH4-Ca(BH4)2 composite system for hydrogen storage. Journal of Alloys and Compounds. 720: pp. 497-501.

Source Title

Journal of Alloys and Compounds

DOI

10.1016/j.jallcom.2017.05.264

ISSN

0925-8388

School

School of Electrical Engineering, Computing and Mathematical Science (EECMS)

URI

http://hdl.handle.net/20.500.11937/72570

Collection

Curtin Research Publications

Abstract

© 2017 Mechanochemical treatment (ball-milling) of NaAlH4-Ca(BH4)2mixtures leads to partial formation of NaBH4and Ca(AlH4)2by a metathesis reaction. The reaction proceeds to different extents depending on the applied ball-milling times, which is confirmed by powder X-ray diffraction and infrared spectroscopy. Additionally, an in-situ synchrotron radiation powder X-ray diffraction study reveals that the metathesis reaction continues due to thermal treatment while the data also supports a two-step decomposition of the formed Ca(AlH4)2. Finally, the reactive hydride composite system was investigated by mass spectrometry and Sieverts' measurement, which reveal release of ~6 wt% H2at T < 400 °C.