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Research Papers

Fabrication and Characterization of Anode-Supported Planar Solid Oxide Fuel Cell Manufactured by a Tape Casting Process

[+] Author and Article Information
Jung-Hoon Song, Nigel M. Sammes1

Connecticut Global Fuel Cell Center (CGFCC), University of Connecticut, Storrs, CT 06269

Sun-Il Park, Seongjae Boo

Gwangju Research Center, Korea Institute of Industrial Technology (KITECH), Gwangju, 506-824, Republic of Korea

Ho-Sung Kim2

Gwangju Research Center, Korea Institute of Industrial Technology (KITECH), Gwangju, 506-824, Republic of Korea

Hwan Moon, Sang-Hoon Hyun

School of Advanced Materials Science and Engineering, Yonsei University, Seoul 120-749, Republic of Korea

1

Present address: Department of Metallurgical & Materials Engineering, Colorado School of Mines, Golden, CO 80401.

2

Corresponding author.

J. Fuel Cell Sci. Technol 5(2), 021003 (Apr 10, 2008) (5 pages) doi:10.1115/1.2885401 History: Received July 05, 2007; Revised January 14, 2008; Published April 10, 2008

A planar anode-supported electrolyte was fabricated using a tape casting method that involved a single step cofiring process. A standard NiO∕8YSZ cermet anode, 8mol% YSZ electrolyte, and a lanthanum strontium manganite cathode were used for the solid oxide fuel cell unit cell. A pressurized cofiring technique allows the creation of a thin layer of dense electrolyte about 10μm without warpage. The open circuit voltage of the unit cell indicated negligible fuel leakage through the electrolyte film due to the dense and crack-free electrolyte layer. An electrochemical test of the unit cell showed a maximum power density up to 0.173Wcm2 at 900°C. Approximated electrochemical properties, e.g., activation energy, Ohmic resistance, and exchange current density, indicated that the cell performance was significantly influenced by the electrode properties of the unit cell.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic flow diagram for fabrication of anode-supported electrolyte by tape casting

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Figure 2

Surface morphology of each film (electrolyte and anode)

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Figure 3

SEM morphology of fabricated unit cell

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Figure 4

Concept of camber angle of curved materials (α, camber angle; Eθ, short distance of two points in the curved unit cell; Em, actually measured distance of two points in the curved unit cell; R, virtual radius)

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Figure 5

V‐I characteristics of fabricated unit cell with the different temperatures

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Figure 6

Impedance spectra of fabricated unit cell at the different temperatures under OCV conditions

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Figure 7

Area-specific resistance with temperature (a) area-specific resistance of Ohmic and polarization resistance; (b) plotting curve between ln (T∕R) and 1∕T

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