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Characterization of cuprate based cathode structures by AC impedance

Research output: Chapter in Book/Report/Conference proceedingConference contribution

DOI

Author(s)

M. Cassidy, J. T S Irvine

School/Research organisations

Abstract

Composites containing the cuprate Nd1.8Ce0.2CuO 4+δ (NCCO) have been shown to have promising behaviour for SOFC cathode applications, with performances similar to those of standard LSM based composites. It is hoped that the n-type conductivity exhibited by the NCCO may confer further operational advantages when operating at high oxygen utilizations or high cell polarisations where the local cathode oxygen partial pressure is reduced. Also, as it contains neither Mn nor Sr (both of which have been implicated in nucleating Cr deposition) it may also have benefits in terms of Cr tolerance. Candidate structures were assessed in a symmetrical half cell arrangement using both AC impedance and SEM examination. So far the best results have been obtained using the in-situ fired current collector Rp values of 0.10 Ω·cm2 and 0.115 Ω·cm2 at around 750°C have been observed for cathode structures with the CGO interface or CGO electrolyte respectively.

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Details

Original languageEnglish
Title of host publicationECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages2689-2698
Number of pages10
Volume25
Edition2 PART 3
DOIs
Publication statusPublished - 1 Dec 2009
Event11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria
Duration: 4 Oct 20099 Oct 2009

Conference

Conference11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
CountryAustria
CityVienna
Period4/10/099/10/09

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