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FLYHY - Fluorine Substituted High Capacity Hydrides for Hydrogen Storage at low Working Temperatures

The targets of the FlyHy project were the development and testing of advanced nanostructured high capacity hydrogen storage materials and testing by

  1. exploiting findings on materials destabilisation and stabilisation resp. by halogen substitution for alane, borohydrides and Reactive Hydride Composites , in order to achieve a breakthrough in the thermodynamic properties of these materials exhibiting the highest hydrogen capacities known at present,
  2. obtaining an in depth scientific understanding of the sorption properties of the substituted materials by extended structural and thermodynamical characterisation and modelling, for materials optimisation,
  3. determining tank relevant materials properties like e.g. densification behaviour and heat conductivity, and
  4. doing tests in a prototype tank in conjunction with a high temperature fuel cell.

The European FP7 Project FLYHY is funded under Grant agreement no.: N° 226943-2.

Its runtime was January, 1st, 2009 to December, 31st, 2011.

Crystal structure of the three new compounds found in the Ca(BH4)2-CaI2 system, from left: a CaI2-type trigonal structure tri-Ca((BH4)0.70I0.30)2 (T = 28 °C), a CaCl2-type orthorhombic structure, ort-Ca((BH4)0.64I0.36)2 (T = 310 °C) and a new structure type tetragonal, tet-Ca((BH4)0.38I0.62)2 with spacegroup I4mm and cell parameters a = 4.110 and c = 24.845 Å (T = 340 °C). The calcium atoms are shown in grey and I‾ and BH4‾, obtaining the same positions, are shown as purple spheres.

Crystal structures of the three new compounds found in the Ca(BH4)2-CaI2 system

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FLYHY is finished