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Electrolyte-assisted hydrogen storage reactions

Vajo, John and Tan, Hongjin and Ahn, Channing and Addison, Dan and Hwang, Sonjong and White, James and Wang, Timothy and Stavila, Vitalie and Graetz, Jason A. (2019) Electrolyte-assisted hydrogen storage reactions. In: 257th ACS National Meeting & Exposition, 31 March-4 April 2019, Orlando, FL.

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Use of electrolytes, in the form of Li/KBH_4 and Li/K/CsI eutectics, is shown to significantly improve (by more than a factor of ten) both the dehydrogenation and full rehydrogenation of the MgH_2/Sn destabilized hydride system and the hydrogenation of MgB_2 to Mg(BH_4)_2. The improvement revealed that inter-particle transport can be an important rate-limiting step during hydrogen cycling in hydrogen storage materials consisting of multiple phases in powder form (e.g., complex and destabilized hydrides). Electrolytes enable solubilizing heavy ions into a liq. environment and thereby facilitate the reaction over the full surface area of the interacting particles. This work suggests that the use of electrolytes in the form of eutectics, ionic liqs., or solvents contg. dissolved salts may be generally applicable for increasing reaction rates in complex and destabilized hydride materials.

Item Type:Conference or Workshop Item (Paper)
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URLURL TypeDescription Website
Vajo, John0000-0002-6271-4899
Hwang, Sonjong0000-0002-3210-466X
Wang, Timothy0000-0002-2736-2488
Stavila, Vitalie0000-0003-0981-0432
Additional Information:© 2019 American Chemical Society.
Record Number:CaltechAUTHORS:20190823-080508870
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98141
Deposited By: Tony Diaz
Deposited On:23 Aug 2019 15:39
Last Modified:03 Oct 2019 21:38

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