TY - GEN
T1 - Ammonium borohydride
T2 - 238th National Meeting and Exposition of the American Chemical Society, ACS 2009
AU - Karkamkar, Abhi
AU - Heldebrant, David J.
AU - Linehan, John C.
AU - Autrey, Tom
PY - 2009/12/1
Y1 - 2009/12/1
N2 - 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).
AB - 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).
UR - http://www.scopus.com/inward/record.url?scp=78649796361&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78649796361&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:78649796361
SN - 9780841200050
T3 - ACS National Meeting Book of Abstracts
BT - American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
Y2 - 16 August 2009 through 20 August 2009
ER -