Structural Properties of Hydrogenated Ca-Intercalated Graphite Compounds

DOI

The recent discovery of superconductivity in Ca-intercalated graphite (C6Ca) has refocused considerable interest onto graphite intercalated compounds (GICs). We would like to study the hydrogen chemisorption mechanism and the solid state properties of the C6Ca ternary systems using in-situ neutron diffraction. Our preliminary adsorption results show that the hydrogen can chemisorb in C6Ca at elevated temperatures well in excess of the composition expected due to the simple formation of CaH2 after the reaction. Furthermore, the resultant materials still shows superconductivity with a slightly depressed Tc, implying hydrogen uptake into the galleries and concomitant layer expansion. In this proposal we would like to follow the intercalation and structural staging transitions of this new material, exploiting the unique ability of neutron diffraction to locate the protons.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24068570
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24068570
Provenance
Creator Dr Neal Skipper; Dr Arthur Lovell; Professor Steve Bennington; Ms Zeynep Kurban
Publisher ISIS Neutron and Muon Source
Publication Year 2012
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2009-06-02T09:20:50Z
Temporal Coverage End 2009-06-06T08:28:57Z