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Reversible Storage of Hydrogen in Destabilized LiBH4
Abstract
Destabilization of LiBH4 for reversible hydrogen storage has been studied using MgH2 as a destabilizing additive. Mechanically milled mixtures of LiBH4 + (1/2)MgH2 or LiH + (1/2)MgB2 including 2-3 mol % TiCl3 are shown to reversibly store 8-10 wt % hydrogen. Variation of the equilibrium pressure obtained from isotherms measured at 315-400 degrees C indicate that addition of MgH2 lowers the hydrogenation/dehydrogenation enthalpy by 25 kJ/(mol of H2) compared with pure LiBH4. Formation of MgB2 upon dehydrogenation stabilizes the dehydrogenated state and, thereby, destabilizes the LiBH4. Extrapolation of the isotherm data yields a predicted equilibrium pressure of 1 bar at approximately 225 degrees C. However, the kinetics were too slow for direct measurements at these temperatures.
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Cited by
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Hydrogen storage: the remaining scientific and technological challenges
Felderhoff, M., Weidenthaler, C., von Helmolt, R., & Eberle, U. (2007) · Physical Chemistry Chemical Physics · doi:10.1039/b701563c · Cited by 532
The renaissance of hydrides as energy materials
Mohtadi, R., & Orimo, S.-I. (2016) · Nature Reviews Materials · doi:10.1038/natrevmats.2016.91 · Cited by 508
Hydrogen storage: beyond conventional methods
Dalebrook, A. F., Gan, W., Grasemann, M., Moret, S., & Laurenczy, G. (2013) · Chemical Communications · doi:10.1039/c3cc43836h · Cited by 503
Unexpected kinetic effect of MgB2 in reactive hydride composites containing complex borohydrides
Barkhordarian, G., Klassen, T., Dornheim, M., & Bormann, R. (2007) · Journal of Alloys and Compounds · doi:10.1016/j.jallcom.2006.09.048 · Cited by 344
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He, T., Cao, H., & Chen, P. (2019) · Advanced Materials · doi:10.1002/adma.201902757 · Cited by 256
Metadata
- Authors
- Vajo, J. J., Skeith, S. L., & Mertens, F.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-02-12
- Volume
- 109
- Issue
- 9
- Pages
- 3719-3722
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2043192670
- Cited by
- 1,001
- References
- 0
- FWCI
- 30.03
- Type
- journal article
- Language
- en
- Open access
- closed
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