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Electrochemical characterization and redox behavior of Nb-doped SrTiO3

Blennow Tullmar, Peter LU ; Hansen, Kent K.; Wallenberg, Reine LU and Mogensen, Mogens (2009) In Solid State Ionics 180(1). p.63-63
Abstract
Sr-vacancy compensated Nb-doped SrTiO3 with the nominal composition Sr0.94Ti0.9Nb0.1O3 has been evaluated as a solid oxide fuel cell (SOFC) anode material in terms of redox stability and electrochemical properties. Sr0.94Ti0.9Nb0.1O3 has been synthesized with a recently developed modified glycine-nitrate process. The phase purity and redox behavior have been analyzed with XRD and TGA. The electrochemical properties of Sr0.94Ti0.9Nb0.1O3 and a composite electrode of Sr0.94Ti0.9Nb0.1O3/YSZ have been investigated by electrochemical impedance spectroscopy (EIS) on cone shaped electrodes and on electrodes in a symmetrical cell configuration. The experiments indicated that the Nb-doped SrTiO3 electrodes were redox stable and showed a potential... (More)
Sr-vacancy compensated Nb-doped SrTiO3 with the nominal composition Sr0.94Ti0.9Nb0.1O3 has been evaluated as a solid oxide fuel cell (SOFC) anode material in terms of redox stability and electrochemical properties. Sr0.94Ti0.9Nb0.1O3 has been synthesized with a recently developed modified glycine-nitrate process. The phase purity and redox behavior have been analyzed with XRD and TGA. The electrochemical properties of Sr0.94Ti0.9Nb0.1O3 and a composite electrode of Sr0.94Ti0.9Nb0.1O3/YSZ have been investigated by electrochemical impedance spectroscopy (EIS) on cone shaped electrodes and on electrodes in a symmetrical cell configuration. The experiments indicated that the Nb-doped SrTiO3 electrodes were redox stable and showed a potential ability to be used as a part of a SOFC anode. The electrochemical activity appeared to be governed by the concentration of defect species (especially Ti3+ and V-0(++)) in the vicinity of the triple phase boundaries. However, the electrocatalytic activity of the materials was not sufficient and it needs to be improved if Nb-doped SrTiO3 based materials are to be realized as SOFC anodes. (C) 2008 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
SOFC, Nb-doped SrTiO3, Ceramic anode, Redox stability
in
Solid State Ionics
volume
180
issue
1
pages
63 - 63
publisher
Elsevier
external identifiers
  • wos:000264538600011
  • scopus:58949100881
ISSN
0167-2738
DOI
10.1016/j.ssi.2008.10.011
language
English
LU publication?
yes
id
e12c5e82-82e3-4c64-b95c-cbe7a676ec78 (old id 1401330)
date added to LUP
2009-06-12 08:41:16
date last changed
2017-12-10 03:44:44
@article{e12c5e82-82e3-4c64-b95c-cbe7a676ec78,
  abstract     = {Sr-vacancy compensated Nb-doped SrTiO3 with the nominal composition Sr0.94Ti0.9Nb0.1O3 has been evaluated as a solid oxide fuel cell (SOFC) anode material in terms of redox stability and electrochemical properties. Sr0.94Ti0.9Nb0.1O3 has been synthesized with a recently developed modified glycine-nitrate process. The phase purity and redox behavior have been analyzed with XRD and TGA. The electrochemical properties of Sr0.94Ti0.9Nb0.1O3 and a composite electrode of Sr0.94Ti0.9Nb0.1O3/YSZ have been investigated by electrochemical impedance spectroscopy (EIS) on cone shaped electrodes and on electrodes in a symmetrical cell configuration. The experiments indicated that the Nb-doped SrTiO3 electrodes were redox stable and showed a potential ability to be used as a part of a SOFC anode. The electrochemical activity appeared to be governed by the concentration of defect species (especially Ti3+ and V-0(++)) in the vicinity of the triple phase boundaries. However, the electrocatalytic activity of the materials was not sufficient and it needs to be improved if Nb-doped SrTiO3 based materials are to be realized as SOFC anodes. (C) 2008 Elsevier B.V. All rights reserved.},
  author       = {Blennow Tullmar, Peter and Hansen, Kent K. and Wallenberg, Reine and Mogensen, Mogens},
  issn         = {0167-2738},
  keyword      = {SOFC,Nb-doped SrTiO3,Ceramic anode,Redox stability},
  language     = {eng},
  number       = {1},
  pages        = {63--63},
  publisher    = {Elsevier},
  series       = {Solid State Ionics},
  title        = {Electrochemical characterization and redox behavior of Nb-doped SrTiO3},
  url          = {http://dx.doi.org/10.1016/j.ssi.2008.10.011},
  volume       = {180},
  year         = {2009},
}