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Electrolyte-Assisted Hydrogen Storage Reactions

Journal Article · · Journal of Physical Chemistry. C
 [1];  [2];  [3];  [2];  [4];  [5];  [5];  [5];  [1]
  1. HRL Lab., LLC, Malibu, CA (United States)
  2. Liox Power, Inc., Pasadena, CA (United States)
  3. Liox Power, Inc., Pasadena, CA (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Engineering and Applied Science
  4. California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Chemistry and Chemical Engineering
  5. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
+ Show Author Affiliations
Use of electrolytes, in the form of LiBH4/KBH4 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 MgH2/Sn destabilized hydride system and the hydrogenation of MgB2 to Mg(BH4)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. In conclusion, 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.
Research Organization:
Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1485827
Report Number(s):
SAND--2018-13343J; 670505
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 47 Vol. 122; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

08 HYDROGEN
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY