Materials for Symmetrical Solid Oxide Fuel Cells

J. C. Ruiz-Morales*, J. Canales-Vazquez, C. Savaniu, J. T. S. Irvine, P. Nunez

*Corresponding author for this work

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

12 Citations (Scopus)

Abstract

A new concept of solid oxide fuel cell (SOFC), Symmetrical SOFC (SFC), has been investigated. In this new configuration, the same electrode material is used simultaneously as anode and cathode. Interconnector materials, such as chromites, could be potential symmetrical electrodes, at least, under pure hydrogen at relatively high temperatures. However, their lack of catalytic activity towards hydrocarbon oxidation led to the use of substituted-chromites to enhance the aforementioned catalytic activity. La(0.75)Sr(0.25)Cr(0.5)Mn(0.5)O(3-delta) (LSCM) is a good option for such symmetrical configuration, rendering fuel cell performances in excess of 500 and 300 mW/cm(2) using pure H(2) and CH(4) as fuel, at 950 degrees C. Other potential materials could be typical n-type anode materials, such as strontium titanates, that could be activated for oxidizing conditions by substituting some of Ti content for Fe to introduce p-type conductivity. Preliminary electrochemical experiments on La(4)Sr(8)Ti(12-x)Fe(x)O(38-delta)-based SFCs show that they perform reasonably well under humidified H(2).

Original languageEnglish
Title of host publicationSOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2
EditorsK Eguchi, SC Singhai, H Yokokawa, H Mizusaki
Place of PublicationPENNINGTON
PublisherELECTROCHEMICAL SOCIETY INC
Pages905-912
Number of pages8
ISBN (Print)978-1-56677-554-0
DOIs
Publication statusPublished - 2007
Event10th International Symposium on Solid Oxide Fuel Cells - Nara, Japan
Duration: 3 Jun 20078 Jun 2007

Publication series

NameECS Transactions
PublisherELECTROCHEMICAL SOCIETY INC
Volume7
ISSN (Print)1938-5862

Conference

Conference10th International Symposium on Solid Oxide Fuel Cells
Country/TerritoryJapan
CityNara
Period3/06/078/06/07

Keywords

  • EXTENDED DEFECTS
  • ANODE
  • METHANE
  • CONDUCTIVITY
  • PEROVSKITES
  • OXIDATION
  • SOFCS

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