On the oxide ion conductivity of potassium doped strontium silicates
Author(s)
Type
Journal Article
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 Sr0.8K0.2Si0.5Ge0.5O2.9 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.
Date Issued
2014-09-01
Date Acceptance
2014-06-20
Citation
Energy and Environmental Science, 2014, 7 (9), pp.2999-3005
ISSN
1754-5692
Publisher
Royal Society of Chemistry
Start Page
2999
End Page
3005
Journal / Book Title
Energy and Environmental Science
Volume
7
Issue
9
Copyright Statement
© The Royal Society of Chemistry 2014
Sponsor
Kaust
Identifier
https://pubs.rsc.org/en/content/articlelanding/2014/EE/C4EE00734D
Grant Number
N/A
Subjects
Science & Technology
Physical Sciences
Technology
Life Sciences & Biomedicine
Chemistry, Multidisciplinary
Energy & Fuels
Engineering, Chemical
Environmental Sciences
Chemistry
Engineering
Environmental Sciences & Ecology
SURFACE EXCHANGE
SOLUBLE SILICATES
OXYGEN-TRANSPORT
DIFFUSION
INTUMESCENCE
ELECTROLYTE
DEHYDRATION
MECHANISM
KINETICS
SIMS
Energy
Publication Status
Published
Date Publish Online
2014-07-09