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Research Papers

Thermal Cycling Evaluation of Rolled Tubular Solid Oxide Fuel Cells

[+] Author and Article Information
Alem Tesfai

Paul Connor, Julie Nairn, John T. S. Irvine

 School of Chemistry, University of St. Andrews, Purdie Building, St. Andrews, Fife, KY16 9ST, United Kingdom

J. Fuel Cell Sci. Technol 8(6), 061001 (Sep 22, 2011) (3 pages) doi:10.1115/1.4004638 History: Received July 08, 2009; Revised July 13, 2011; Published September 22, 2011; Online September 22, 2011

Rolled tubular solid oxide fuel cells are manufactured in a low-cost single step firing process, so the design offers reduced production cost. All components are produced using a low cost tape casting method and are fired as a single unit. The geometry is self–supporting which removes the need for thick cell components further reducing cell cost and offering increased volumetric power densities. Here we present the results from some early studies on the influence of fast thermal cycling on performance characteristics. Thermal cycles were carried out heating and cooling at 10 °C min−1 between 400 and 800 °C. Less than 1% performance drop was calculated for the single cell and 5% drop was observed on the fourth cycle for the five cell bundle.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic single cell design

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Figure 2

Five cell bundle design

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Figure 3

Impedance data as a function of thermal cycling for single cell obtained at 800 °C, showing the initial test data and the data for temperature cycling one to five. Measurement conditions H2 on the anode O2 on the cathode at OCV.

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Figure 4

Single cell thermal cycling I-V data comparison plot, obtained at 800 °C, showing the initial test data and the data for temperature cycling one to five. Measurement conditions H2 on the anode O2 on the cathode.

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Figure 5

Five cell bundle thermal cycling I-V data obtained at 800 °C, showing the data for temperature cycle one and cycle four. Measurement conditions H2 on the anode O2 on the cathode.

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Figure 6

Data comparison between Rs , Rp , and Rt , obtained at 800 °C, showing the data for temperature cycling one to five. Measurement conditions H2 on the anode and O2 on the cathode.

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