Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.715676
Title: The effect of carbon and silicon-based additives on the hydrogen storage properties of lithium borohydride
Author: Vines, Joshua Edwin
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 2017
Availability of Full Text:
Access from EThOS:
Access from Institution:
Abstract:
LiBH\(_4\) was added to a number of different non-reactive additives in order to investigate their influence on the hydrogen storage properties of LiBH\(_4\). Graphite is a cheap and abundant material that has been used to destabilize hydrogen storage materials such as LiH. Ball milling graphite under Ar was shown to induce a higher amorphous content compared to milling under H\(_2\). The addition of LiBH\(_4\) to graphite milled under Ar resulted in a reduction of 102°C in the decomposition temperature of LiBh\(_4\). The effect of porous additives was investigated through the incorporation of LiBH\(_4\) into zeolite templated carbon (ZTC) and porous silicon. Confinement in these scaffolds resulted in a decrease in the decomposition temperature of LiBH\(_4\) by 125°C. The smaller pore size of ZTC was found to have the greatest effect on the H\(_2\) onset and cyclic stability of LiBh\(_4\). The pre-melting of LiBh\(_4\) into porous scaffolds was shown to eliminate B\(_2\)H\(_6\) release during decomposition. No correlation between the surface area of the additives and decomposition temperature of LiBH\(_4\) was observed. Although none of the materials studied in this work meet the United States DoE targets, confinement of LiBH\(_4\) in porous structures offers a promising approach to unlocking its potential.
Supervisor: Not available Sponsor: Engineering and Physical Sciences Research Council
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.715676  DOI: Not available
Keywords: TN Mining engineering. Metallurgy
Share: