Imperial College London
Alternate

Dr Ainara Aguadero

Faculty of Engineering, Department of Materials

Visiting Reader
 
 
 
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Contact

 

+44 (0)20 7594 5174a.aguadero CV

 
 
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Location

 

1.07Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cascos:2017:10.1149/2.0031710jes,
author = {Cascos, V and Aguadero, A and Harrington, G and Fernandez-Diaz, MT and Alonso, JA},
doi = {10.1149/2.0031710jes},
journal = {Journal of The Electrochemical Society},
pages = {F3019--F3027},
title = {Design of Sr0.7R0.3CoO3-delta (R = Tb and Er) perovskites performing as cathode materials in solid oxide fuel cells},
url = {http://dx.doi.org/10.1149/2.0031710jes},
volume = {164},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Sr0.7R0.3CoO3-δ (R = Tb and Er) tetragonal perovskites have been prepared and evaluated as mixed ionic-electronic cathodes for SOFC. Neutron powder diffraction (NPD) measurements evidenced that both compounds are oxygen hypo-stoichiometric with long-range order of oxygen vacancies that leads to a tetragonal perovskite-type superstructure (s.g. I4/mmm) stable within the whole temperature range under study. The oxygen vacancies located mainly in the equatorial oxygen positions exhibit large displacement factors. The high oxygen mobility in Sr0.7Tb0.3CoO3-δ was confirmed by 18O oxygen labeling followed by Secondary Ion Mass Spectrometry (SIMS) with values of oxygen self-diffusion of 1.29 × 10−10 cm2/s at 525°C. Polarization resistances with LSGM as electrolyte gave values as low as 0.011 Ω⋅cm2 and maximum output powers of 570 mW/cm2 at 850°C were obtained in test cells set in electrolyte-supported configuration. Electrical conductivity, thermal and chemical expansion and stability measurements confirm the potential of these materials as cathodes for SOFC.
AU  - Cascos,V
AU  - Aguadero,A
AU  - Harrington,G
AU  - Fernandez-Diaz,MT
AU  - Alonso,JA
DO  - 10.1149/2.0031710jes
EP  - 3027
PY  - 2017///
SN  - 1945-7111
SP  - 3019
TI  - Design of Sr0.7R0.3CoO3-delta (R = Tb and Er) perovskites performing as cathode materials in solid oxide fuel cells
T2  - Journal of The Electrochemical Society
UR  - http://dx.doi.org/10.1149/2.0031710jes
UR  - http://hdl.handle.net/10044/1/64102
VL  - 164
ER  -
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