Ammonium borohydride

Solid hydrogen storage material with highest gravimetric hydrogen content

Abhi Karkamkar, David J. Heldebrant, John Linehan, Tom Autrey

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Various options for hydrogen storage are being studied ranging gases (hydrogen), liquids (e.g., methanol) to solids (e.g., lithium borohydride, boranes and amides). However, no single material today meets all the required technical targets. Here we report the synthesis, structure and hydrogen desorption properties of a unique hydrogen storage material, i.e., one that stores hydrogen on both the cation and anion, ammonium borohydride. Further we show the compound releases greater than 20 wt% hydrogen in three steps at temperatures less than 180 °C and provide evidence that NH4BH4 crystallizes at room temperature and standard pressure in a rock-salt structure. The experimental lattice parameters provide an estimate of the volumetric density, ca. 154 g Hydrogen/liter of NH4BH4. The high volumetric capacity is comparable to many metal hydrides, however, as NH4BH4 has hydrogen stored on both the cationic and anionic sites which leads to a significantly greater gravimetric density (244 gm Hydrogen/kg).

Original languageEnglish
Title of host publicationACS National Meeting Book of Abstracts
Publication statusPublished - 2009
Event238th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Washington, DC, United States
Duration: Aug 16 2009Aug 20 2009

Other

Other238th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CityWashington, DC
Period8/16/098/20/09

Fingerprint

Borohydrides
Hydrogen storage
Ammonium Compounds
Hydrogen
Boranes
Amides
Hydrides
Lattice constants
Anions
Methanol
Cations
Desorption
Lithium
Negative ions
Salts
Gases
Positive ions
Metals
Rocks
Temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Karkamkar, A., Heldebrant, D. J., Linehan, J., & Autrey, T. (2009). Ammonium borohydride: Solid hydrogen storage material with highest gravimetric hydrogen content. In ACS National Meeting Book of Abstracts

Ammonium borohydride : Solid hydrogen storage material with highest gravimetric hydrogen content. / Karkamkar, Abhi; Heldebrant, David J.; Linehan, John; Autrey, Tom.

ACS National Meeting Book of Abstracts. 2009.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Karkamkar, A, Heldebrant, DJ, Linehan, J & Autrey, T 2009, Ammonium borohydride: Solid hydrogen storage material with highest gravimetric hydrogen content. in ACS National Meeting Book of Abstracts. 238th National Meeting and Exposition of the American Chemical Society, ACS 2009, Washington, DC, United States, 8/16/09.
Karkamkar A, Heldebrant DJ, Linehan J, Autrey T. Ammonium borohydride: Solid hydrogen storage material with highest gravimetric hydrogen content. In ACS National Meeting Book of Abstracts. 2009
Karkamkar, Abhi ; Heldebrant, David J. ; Linehan, John ; Autrey, Tom. / Ammonium borohydride : Solid hydrogen storage material with highest gravimetric hydrogen content. ACS National Meeting Book of Abstracts. 2009.
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