New insights into the thermodynamic behavior of 2LiBH₄-MgH₂ composite for hydrogen storage

Journal Article · Mon Jun 15 00:00:00 EDT 2015 · Journal of Physical Chemistry. C

DOI:https://doi.org/10.1021/acs.jpcc.5b02047· OSTI ID:1212231

Cova, Federico ^[1]; Ronnebro, Ewa ^[2]; Choi, Yong-Joon ^[3]; Gennari, Fabiana ^[1]; Larochette, Pierre ^[1]

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1. CNEA, Rio Negro (Argentina)
2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Globalfoundries, Malta, NY (United States)

The composite 2LiBH₄:MgH₂ has been studied as a possible hydrogen storage material due to its high storage capacity. The present work is directed towards the clarification of the thermodynamic behavior of the system, especially in the temperature region above 400°C. We reveal different reaction paths during hydrogen absorption and desorption at various temperatures which has important implication for applications. At temperatures higher than 413°C, the observation of two different absorption pressure plateaus indicates that two different reactions occur, however, below this temperature there is only one plateau present in the system. During desorption, the double plateau can be observed at temperatures as low as 375°C.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1212231
• Report Number(s): PNNL-SA-108581; HT0202000
• Journal Information: Journal of Physical Chemistry. C, Vol. 119, Issue 28; ISSN 1932-7447
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
hydrogen storage
thermodynamics
reactive composites