Assessment of full ceramic solid oxide fuel cells based on modified strontium titanates

Peter Holtappels, Tania Ramos, Bhaskar Reddy Sudireddy, Sune Veltzé, Luise Theil Kuhn, Peter Stanley Jørgensen, Wei Zhang, Qianli Ma, Frank Tietz, Viacheslav Vasechko, Jürgen Malzbender, Boris Iwanschitz, Andreas Mai, Jeppe Rass-Hansen, Maarten C. Verbraeken, Elena Stefan, John TS. Irvine

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Todays’ solid oxide fuels cells based on composite Ni-cermet anodes have been developed up to reasonable levels of performance and durability. However, especially for small combined heat and power supply systems, known failure mechanisms e.g. re-oxidation, sulfur tolerance and coking have stimulated the development for full ceramic anodes based on strontium titanates. Furthermore, the Ni-cermet is primarily a hydrogen oxidation electrode and efficiency losses might occur when operating on carbon containing fuels.
In the European project SCOTAS-SOFC full ceramic cells comprising CGO/Ni infiltrated SrTiO3 anodes, and LSM/YSZ cathodes have been developed and tested as single 5 x 5 cm2 cells and up 100 cm2 circular cells. The initial performance exceeded 0.4 W/cm2 at 850 °C and redox tolerance has been proven. The cell concept provides flexibility with respect to the used electro-catalysts and various infiltrated metals including Ni and Ru have been studied. Stable power output has been observed for Ru and Ni-CGO as infiltrate. While redox tolerance is maintained, both types of cells degrade rapidly under exposure to sulfur. An initial assembly of a 60 cell stack in a one kW Hexis Galileo system indicates the necessity for further stack design adaptation in order to account for the lower electronic conductivity compared to Ni-cermet based cells.
Original languageEnglish
Title of host publicationProceedings of 11th European SOFC and SOE Forum 2014
Number of pages9
PublisherEuropean Fuel Cell Forum
Publication date2014
Article numberB0909
ISBN (Electronic)3-905592-16-9
Publication statusPublished - 2014
EventEuropean fuel cell 2014 - 11th European SOFC and SOE Forum 2014 - Lucerne, Switzerland
Duration: 1 Jul 20144 Jul 2014


ConferenceEuropean fuel cell 2014 - 11th European SOFC and SOE Forum 2014


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