Development of Group II Borohydrides as Hydrogen Storage Materials
The Group II alkaline earth metal borohydrides, Mg(BH4)2 and Ca(BH4)2 are among the most promising materials for light-weight, high-capacity hydrogen storage. Five years ago, little were known about the potential of these materials for reversible hydrogen storage, except for their high hydrogen content of 14.9wt% and 11.6wt% respectively. Theory predicted nearly ideal thermodynamics, but competing decomposition pathways. Solid state synthesis routes have been developed and crystal structures and decomposition products have been identified as well as methods to improve hydrogen sorption performance including catalysis and nanoscience. Reversibility was demonstrated for both materials, but at high pressures and temperatures. We will here review recent progress and discuss challenges and future pathways towards applications.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1009730
- Report Number(s):
- PNNL-SA-74444; COSSFX; EB4202000; TRN: US201107%%837
- Journal Information:
- Current Opinion in Solid State and Materials Science, 15(2):44-51, Vol. 15, Issue 2; ISSN 1359-0286
- Country of Publication:
- United States
- Language:
- English
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