ISIS Neutron and Muon Source Data Journal

Ba3MoNbO8.5 novel oxide ion conductor: Direct observation of oxide ion dynamics

Abstract: Oxide ion conductors are researched as electrolytes in solid oxide fuel cells. Yttria-stabilized zirconia is the currently used electrolyte in SOFCs, leading to high operating temperatures of 800-1000 °C, precluding their wider use. Ba3MoNbO8.5 adopts a novel structure, a hybrid of the 9R perovskite polytype and the palmierite structure. It is a pure oxide ion conductor with sigma= 2.2 × 10-3 S cm-1 at 600 °C. Our research on new oxide ion conductors, based in part on using neutron scattering and computational modelling, has resulted in new insight into the structure-dynamics-property relationships in some of the leading fluorite, apatite and melilite-type ionic conductors. We request 5 days of IRIS and 2 days of MERLIN beam time to carry out the first inelastic/quasi-elastic neutron scattering experiments on the new hexagonal perovskite based oxide ion conductor Ba3MoNbO8.5.

Principal Investigator: Professor Ivana Evans
Local Contact: Dr Devashi Adroja
Experimenter: Dr Sanghamitra Mukhopadhyay
Experimenter: Dr Andrea Piovano
Experimenter: Miss Chloe Fuller
Experimenter: Mr Adam Lovett
Experimenter: Dr Mark Johnson

DOI: 10.5286/ISIS.E.RB1810352

ISIS Experiment Number: RB1810352

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Ivana Evans et al; (2018): Ba3MoNbO8.5 novel oxide ion conductor: Direct observation of oxide ion dynamics, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810352

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