The effect of doping in the electrochemical performance of (Ln1-xMx)FeO3-δ SOFC cathodes

Karmele Vidal; Lide M. Rodríguez-Martínez; Luis Ortega-San-Martin; Ana Martínez-Amesti; María Luisa Nó; Teófilo Rojo; Ander Laresgoiti; María Isabel Arriortua

doi:10.1016/j.jpowsour.2008.12.034

The effect of doping in the electrochemical performance of (Ln_1-xM_x)FeO_3-δ SOFC cathodes

Karmele Vidal, Lide M. Rodríguez-Martínez, Luis Ortega-San-Martin, Ana Martínez-Amesti, María Luisa Nó, Teófilo Rojo, Ander Laresgoiti, María Isabel Arriortua

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

A family of iron perovskites with the general formula AFeO_3-δ (A = Ln_1-xM_x; Ln = La, Nd and/or Pr; M = Sr or/and Ca) has been prepared keeping fixed the A cation radius 〈r_A〉 and cation size mismatch to isolate the effect of divalent dopant concentration from the A-cation steric effects. The electrochemical behaviour of these compounds for their application as SOFC cathodes was evaluated by using I-V curve measurements and ac impedance spectroscopy over three electrodes electrolyte supported cells processed under identical conditions. In contrast with the bulk behaviour, trends are more difficult to observe due to microstructural effects, but results seem to indicate that the doping level, x, does not influence in a significant way the electrochemical performance of iron perovskites with identical 〈r_A〉 and σ²(r_A).

Original language	English
Pages (from-to)	175-179
Number of pages	5
Journal	Journal of Power Sources
Volume	192
Issue number	1
DOIs	https://doi.org/10.1016/j.jpowsour.2008.12.034
State	Published - 1 Jul 2009
Externally published	Yes

Keywords

A-site
Electrochemical performance
LSF
Perovskite
SOFC cathodes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2008.12.034

Cite this

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title = "The effect of doping in the electrochemical performance of (Ln1-xMx)FeO3-δ SOFC cathodes",

abstract = "A family of iron perovskites with the general formula AFeO3-δ (A = Ln1-xMx; Ln = La, Nd and/or Pr; M = Sr or/and Ca) has been prepared keeping fixed the A cation radius 〈rA〉 and cation size mismatch to isolate the effect of divalent dopant concentration from the A-cation steric effects. The electrochemical behaviour of these compounds for their application as SOFC cathodes was evaluated by using I-V curve measurements and ac impedance spectroscopy over three electrodes electrolyte supported cells processed under identical conditions. In contrast with the bulk behaviour, trends are more difficult to observe due to microstructural effects, but results seem to indicate that the doping level, x, does not influence in a significant way the electrochemical performance of iron perovskites with identical 〈rA〉 and σ2(rA).",

keywords = "A-site, Electrochemical performance, LSF, Perovskite, SOFC cathodes",

author = "Karmele Vidal and Rodr{\'i}guez-Mart{\'i}nez, {Lide M.} and Luis Ortega-San-Martin and Ana Mart{\'i}nez-Amesti and N{\'o}, {Mar{\'i}a Luisa} and Te{\'o}filo Rojo and Ander Laresgoiti and Arriortua, {Mar{\'i}a Isabel}",

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AU - Vidal, Karmele

AU - Rodríguez-Martínez, Lide M.

AU - Ortega-San-Martin, Luis

AU - Martínez-Amesti, Ana

AU - Nó, María Luisa

AU - Rojo, Teófilo

AU - Laresgoiti, Ander

AU - Arriortua, María Isabel

PY - 2009/7/1

Y1 - 2009/7/1

N2 - A family of iron perovskites with the general formula AFeO3-δ (A = Ln1-xMx; Ln = La, Nd and/or Pr; M = Sr or/and Ca) has been prepared keeping fixed the A cation radius 〈rA〉 and cation size mismatch to isolate the effect of divalent dopant concentration from the A-cation steric effects. The electrochemical behaviour of these compounds for their application as SOFC cathodes was evaluated by using I-V curve measurements and ac impedance spectroscopy over three electrodes electrolyte supported cells processed under identical conditions. In contrast with the bulk behaviour, trends are more difficult to observe due to microstructural effects, but results seem to indicate that the doping level, x, does not influence in a significant way the electrochemical performance of iron perovskites with identical 〈rA〉 and σ2(rA).

AB - A family of iron perovskites with the general formula AFeO3-δ (A = Ln1-xMx; Ln = La, Nd and/or Pr; M = Sr or/and Ca) has been prepared keeping fixed the A cation radius 〈rA〉 and cation size mismatch to isolate the effect of divalent dopant concentration from the A-cation steric effects. The electrochemical behaviour of these compounds for their application as SOFC cathodes was evaluated by using I-V curve measurements and ac impedance spectroscopy over three electrodes electrolyte supported cells processed under identical conditions. In contrast with the bulk behaviour, trends are more difficult to observe due to microstructural effects, but results seem to indicate that the doping level, x, does not influence in a significant way the electrochemical performance of iron perovskites with identical 〈rA〉 and σ2(rA).

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KW - Electrochemical performance

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