title: Blending materials composed of boron, nitrogen and carbon to transform approaches to liquid hydrogen stores.
abstract: Mixtures of hydrogen storage materials containing the elements of boron, nitrogen, carbon, i.e., isomers of BN cyclopentanes are examined to find a 'fuel blend' that remains a liquid phase throughout hydrogen release, maximizes hydrogen storage density, minimizes impurities and remains thermally stable at ambient temperatures. We find that the mixture of ammonia borane dissolved in 3-methyl-1,2-dihydro-1,2-azaborolidine (compound B) provide a balance of these properties and provides ca. 5.6 wt% hydrogen. The two hydrogen storage materials decompose at a faster rate than either individually and products formed are a mixture of molecular trimers. Digestion of the product mixture formed from the decomposition of the AB + B fuel blend with methanol leads to the two corresponding methanol adducts of the starting material and not a complex mixture of adducts. The work shows the utility of using blends of materials to reduce volatile impurities and preserve liquid phase.
authors.affiliation: Fundamental Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA.
authors.forename: Sean M
authors.initials: SM
authors.lastname: Whittemore
authors.forename: Mark
authors.initials: M
authors.lastname: Bowden
authors.forename: Abhijeet
authors.initials: A
authors.lastname: Karkamkar
authors.forename: Kshitij
authors.initials: K
authors.lastname: Parab
authors.forename: Doinita
authors.initials: D
authors.lastname: Neiner
authors.forename: Tom
authors.initials: T
authors.lastname: Autrey
authors.forename: Jacob S A
authors.initials: JS
authors.lastname: Ishibashi
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.forename: Shih-Yuan
authors.initials: SY
authors.lastname: Liu
authors.forename: David A
authors.initials: DA
authors.lastname: Dixon