One of the main targets in the development of anode-supported solid oxide fuel cell (SOFCs) is to improve the electrochemical performance. This can be achieved by optimizing processing and microstructural parameters of the SOFCs. Variations of the thickness of the cathode functional layer and the cathode current collector layer, the grain size of the powders used for applying these layers, and the sintering temperature, can influence the electrochemical performance as such that lower operation temperatures become possible without detrimentally affecting the power output to a great extent. In this study the effect of variations of the sintering temperature of the cathode on (1) the microstructure, (2) the gas diffusivity and permeability in the cathode, and (3) electrochemical performance of FZJ-type anode-supported single cells, was investigated. The FZ-Jülich cell design is based on anode-supported type cells, which are characterized by a relatively thick anode (thickness: ) consisting of a /8YSZ cermet, a thin 8YSZ electrolyte, and a bi-layered cathode. The cathode distinguished two separated layers: first a cathode functional layer consisting of -stabilized (8YSZ) and a cathode current collector layer of pure (LSM). This study can be considered as a follow-up of that (Journal of Power Sources 141 (2005) 216–226) describing the improvement of the cell performance by a systematic variation of the microstructure. The experiments described in this paper and the corresponding results are part of a more extensive study to investigate in more detail the effect of the sintering temperature on the electrochemical performance of LSM-type SOFCs. Since research is still going on, conclusions, drawn in this contribution, are yet not definitive.
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e-mail: jo.mertens@fz-juelich.de
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November 2006
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Sintering Behavior of Type Cathodes for Planar Anode-Supported SOFCs
Josef Mertens,
e-mail: jo.mertens@fz-juelich.de
Josef Mertens
Institute for Materials and Processes in Energy Systems
, Forschungszentrum Jülich, 52425 Jülich, Germany
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Vincent A. C. Haanappel,
Vincent A. C. Haanappel
Institute for Materials and Processes in Energy Systems
, Forschungszentrum Jülich, 52425 Jülich, Germany
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Christian Wedershoven,
Christian Wedershoven
Institute for Materials and Processes in Energy Systems
, Forschungszentrum Jülich, 52425 Jülich, Germany
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Hans-Peter Buchkremer
Hans-Peter Buchkremer
Institute for Materials and Processes in Energy Systems
, Forschungszentrum Jülich, 52425 Jülich, Germany
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Josef Mertens
Institute for Materials and Processes in Energy Systems
, Forschungszentrum Jülich, 52425 Jülich, Germanye-mail: jo.mertens@fz-juelich.de
Vincent A. C. Haanappel
Institute for Materials and Processes in Energy Systems
, Forschungszentrum Jülich, 52425 Jülich, Germany
Christian Wedershoven
Institute for Materials and Processes in Energy Systems
, Forschungszentrum Jülich, 52425 Jülich, Germany
Hans-Peter Buchkremer
Institute for Materials and Processes in Energy Systems
, Forschungszentrum Jülich, 52425 Jülich, GermanyJ. Fuel Cell Sci. Technol. Nov 2006, 3(4): 415-421 (7 pages)
Published Online: March 1, 2006
Article history
Received:
November 30, 2005
Revised:
March 1, 2006
Citation
Mertens, J., Haanappel, V. A. C., Wedershoven, C., and Buchkremer, H. (March 1, 2006). "Sintering Behavior of Type Cathodes for Planar Anode-Supported SOFCs." ASME. J. Fuel Cell Sci. Technol. November 2006; 3(4): 415–421. https://doi.org/10.1115/1.2349522
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