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Title: On the oxide ion conductivity of potassium doped strontium silicates
Authors: Bayliss R.D.
Cook S.N. 
Fearn S.
Kilner J.A.
Greaves C.
Skinner S.J.
Issue Date: 2014
Publisher: Royal Society of Chemistry
Citation: Bayliss R.D., Cook S.N., Fearn S., Kilner J.A., Greaves C., Skinner S.J. (2014). On the oxide ion conductivity of potassium doped strontium silicates. Energy and Environmental Science 7 (9) : 2999-3005. ScholarBank@NUS Repository.
Abstract: Recent reports of remarkably high oxygen ion conductivity in a new family of layered strontium silicates have questioned the rationale for materials design in solid electrolytes. Here, we present a re-investigation of the crystal structure, microstructure, total conductivity and perform the first direct investigation of oxygen ion diffusivity of a nominal Sr0.8K 0.2Si0.5Ge0.5O2.9 composition. The results show very low levels of oxide ion conductivity, which do not correlate with total electrical conductivity. Furthermore, sub-micron elemental mapping reveals a previously unreported inhomogeneous chemical composition. The absence of evidence for secondary phases in the diffraction data suggests that the additional phases are amorphous in nature. This journal is � the Partner Organisations 2014.
Source Title: Energy and Environmental Science
ISSN: 17545692
DOI: 10.1039/c4ee00734d
Appears in Collections:Staff Publications

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