@inproceedings{8214062e0b664a6ea06de78cd46f6902,
title = "Performance of (Ln0.5M0.5)FeO3-δ perovskites as cathode for SOFCs: Effect of mean radius of the A site cations",
abstract = "Crystal structure, microstructure, electrical conductivity and electrochemical performance of a new family of iron perovskites with the general formula Ln0.5M0.5FeO3-δ (Ln = La and/or Pr; M = Sr, Ca or/and Ba) has been studied as function of mean A cation radius 〈rA〉. All the samples have a rhombohedral structure (space group: R-3c). SEM images show that the average grain size decreases with increasing 〈rA〉. The DC four-probe measurements indicate that all samples have high electrical conductivity, increasing with 〈r A〉. The electrochemical behaviour of these cathode materials was evaluated by using I-V curve measurements and AC impedance spectroscopy over three electrodes electrolyte supported cells. The results show a great improvement in cathode performance and a significant decrease in polarization resistance with increasing mean A cation radius 〈rA〉.",
author = "K. Vidal and Rodr{\'i}guez-Mart{\'i}nez, {L. M.} and L. Ortega-San-Mart{\'i}n and A. Mart{\'i}nez-Amesti and {Luisa N{\'o}}, M. and A. Rojo and T. Laresgoiti and Arriortua, {M. I.}",
year = "2009",
doi = "10.1149/1.3205797",
language = "English",
isbn = "9781566777391",
series = "ECS Transactions",
number = "2 PART 3",
pages = "2427--2434",
booktitle = "ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)",
edition = "2 PART 3",
note = "11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting ; Conference date: 04-10-2009 Through 09-10-2009",
}