PhD: High Capacity Mixed Metal Borohydrides Ammoniates for Hydrogen Storage Applications

Hydrogen is a promising alternative energy carrier for the future due to its high specific energy and environmental friendliness. Hydrogen storage technologies to support renewable energy systems and low-carbon transportation is a key technical challenge. Ammonia can be catalytically split in to N2 and H2 and its hydrogen content is about 17.3 wt.%, which can store 30 % more energy per volume than liquid H2. Utilization of NH3 for on-board storage system is hampered due to its toxicity. A new class of materials called Metal Borohydride Ammoniates (MBAs) show improved hydrogen storage properties. MBAs tend to release hydrogen/ammonia gas at more practical temperatures and with greater purity. This research will focus on the development of novel Mixed Metal Borohydride Ammoniates (MMBAs) to achieve even higher hydrogen storage densities, elucidate the reaction mechanisms responsible for the release mechanism and investigate catalysts to accelerate the release of hydrogen from these materials. The project involves synthesis of various MMBAs, a variety of material characterisation techniques (e.g. XRD, TGA, DSC, FTIR, GC-MS) and hydrogen performance testing by the Sieverts’ technique. There will also be opportunities to use large scale facilities such as neutron diffraction at the Institut Laue Langevin in France.

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