Development and testing of impregnated La0.20Sr0.25Ca0.45TiO3 anode microstructures for solid oxide fuel cells

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Date

2017

Abstract

The A-site deficient perovskite: La0.20Sr0.25Ca0.45TiO3 (LSCTA-) is a mixed ionic and electronic conductor (MIEC) which shows promising performance as a Solid Oxide Fuel Cell (SOFC) anode ‘backbone’ material, when impregnated with metallic and oxide-ion conducting electrocatalysts. Here, we present data on the complete ceramic processing and optimisation of the LSCTA- ‘backbone’ microstructure, in order to improve current distribution throughout the anode. Through control of ink rheology, screen printing parameters and sintering protocol an advantageous LSCTA- microstructural architecture was developed, exhibiting an ‘effective’ conductivity of 21 S cm-1. Incorporation of this LSCTA- anode microstructure into SOFC and impregnation with Ce0.80Gd0.20O1.9 and either Ni, Ru, Rh, Pt or Pd resulted in promising initial performances during fuel cell testing in a fuel stream of 97% H2:3% H2O. Area Specific Resistances of 0.41 Ω cm2 and 0.39 Ω cm2 were achieved with anodes containing Rh/CGO and Pd/CGO, respectively.

Citation

Price , R , Cassidy , M , Schuler , J A , Mai , A & Irvine , J T S 2017 , Development and testing of impregnated La 0.20 Sr 0.25 Ca 0.45 TiO 3 anode microstructures for solid oxide fuel cells . in 15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV) . ECS Transactions , no. 1 , vol. 78 , Electrochemical Society , pp. 1385-1395 , SOFC-XV: 15th International Symposium on Solid Oxide Fuel Cells July 23, 2017 - July 28, 2017 , Hollywood , United States , 23-28 July . DOI: 10.1149/07801.1385ecst

conference

Version

Postprint

Publication

15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV)

URI

http://hdl.handle.net/10023/11643

DOI

http://dx.doi.org/10.1149/07801.1385ecst

ISSN

1938-6737

Type

Conference item

Rights

© 2017 ECS - The Electrochemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1149/07801.1385ecst

Description

Funding: EPSRC project EP/M014304/1 “Tailoring of Microstructural Evolution in Impregnated SOFC Electrodes”, the University of St Andrews and HEXIS AG.

St Andrews Research Repository