Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.497691
Title: Tuneable graphite intercalates for hydrogen storage
Author: Lovell, Arthur
Awarding Body: University of London
Current Institution: University College London (University of London)
Date of Award: 2007
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Abstract:
The development of hydrogen as an energy transfer mechanism is of great importance to alleviate environmental damage and economic destabilisation caused by over-reliance on oil, as long as the hydrogen can be generated renewably. To be suitable for road transport applications, safe and compact hydrogen storage systems need to be developed, the primary technological motivation for this PhD project which investigates hydrogen absorbed into graphite intercalation compounds (GICs), to gain a fundamental physical understanding of the sorption processes to improve such materials' capacity for hydrogen storage. Literature searching has led to a principal investigation, primarily using neutron scattering and thermogravimetry, of potassium and calcium-GICs with hydrogen. Inelastic neutron scattering on hydrogenated KC24 has shown hydrogen sorption in this system to be quantitatively different from its analogues RbC24 and CsC24. A consistent model of the H2 sites and dynamics has been proposed. Time-resolved structural data on the hydriding phase transition in KC8Hx have been obtained. A calcium-ammonia intercalate has shown most promise for hydrogen storage, with uptake of 3.2 wt.% H2 at 77 K and 2 bar, a signifcant amount of the 6 wt.% target set by the US DoE. It is concluded that available internal volume and donor charge in GICs are critical parameters for optimising hydrogen uptake.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.497691  DOI: Not available
Keywords: Department of Physics and Astronomy
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