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Electrolyte-Assisted Hydrogen Storage Reactions

Vajo, John J. and Tan, Hongjin and Ahn, Channing C. and Addison, Dan and Hwang, Son-Jong and White, James L. and Wang, Timothy C. and Stavila, Vitalie and Graetz, Jason (2018) Electrolyte-Assisted Hydrogen Storage Reactions. Journal of Physical Chemistry C, 122 (47). pp. 26845-26850. ISSN 1932-7447. doi:10.1021/acs.jpcc.8b08335.

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Use of electrolytes, in the form of LiBH_4/KBH_4 and LiI/KI/CsI eutectics, is shown to significantly improve (by more than a factor of 10) 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 interparticle transport of atoms heavier than hydrogen can be an important rate-limiting step during hydrogen cycling in hydrogen storage materials consisting of multiple phases in powder form. Electrolytes enable solubilizing heavy ions into a liquid environment and thereby facilitate the reaction over full surface areas of interacting particles. The examples presented suggest that use of electrolytes in the form of eutectics, ionic liquids, or solvents containing dissolved salts may be generally applicable for increasing reaction rates in complex and destabilized hydride materials.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Vajo, John J.0000-0002-6271-4899
Hwang, Son-Jong0000-0002-3210-466X
White, James L.0000-0002-8216-7212
Wang, Timothy C.0000-0002-2736-2488
Stavila, Vitalie0000-0003-0981-0432
Additional Information:© 2018 American Chemical Society. Received: August 27, 2018; Revised: November 5, 2018; Published: November 5, 2018. This work was supported by the U.S. Department of Energy under contract DE-EE0007849. The NMR facility at the California Institute of Technology was supported by the National Science Foundation (NSF) under Grant Number 9724240 and partially supported by the MRSEC Program of the NSF under Award Number DMR-520565. Sandia authors gratefully acknowledge research support from the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Fuel Cell Technologies Office through the Hydrogen Storage Materials Advanced Research Consortium (HyMARC). Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA-0003525. This paper describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the paper do not necessarily represent the views of the U.S. Department of Energy or the United States Government. The authors declare no competing financial interest.
Funding AgencyGrant Number
Department of Energy (DOE)DE-EE0007849
Department of Energy (DOE)DE-NA-0003525
Issue or Number:47
Record Number:CaltechAUTHORS:20181106-103928050
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Official Citation:Electrolyte-Assisted Hydrogen Storage Reactions. John J. Vajo, Hongjin Tan, Channing C. Ahn, Dan Addison, Son-Jong Hwang, James L. White, Timothy C. Wang, Vitalie Stavila, and Jason Graetz. The Journal of Physical Chemistry C 2018 122 (47), 26845-26850. DOI: 10.1021/acs.jpcc.8b08335
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90666
Deposited By: Tony Diaz
Deposited On:06 Nov 2018 18:48
Last Modified:16 Nov 2021 03:34

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