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Research Papers

Fabrication and Characterization of an Anode-Side, Substrate-Supported Planar SOFC

[+] Author and Article Information
Nguyen Xuan Phuong Vo

 Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul, Korea; Korea University of Science and Technology (UST), Daejeon, Korea

Quang Nhu Ho, Tae-Hoon Lim, Seong-Ahn Hong, Suk Woo Nam, Sung Pil Yoon

 Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul, Korea

J. Fuel Cell Sci. Technol 8(5), 051004 (Jun 13, 2011) (4 pages) doi:10.1115/1.4004173 History: Received March 12, 2010; Accepted May 03, 2011; Published June 13, 2011; Online June 13, 2011

This paper describes a simple and reliable method of fabricating an anode-side, substrate-supported (AS-SS) planar cell constructed of a porous 3YSZ support and thin, selective-area layers of NiO/YSZ anode, 8YSZ electrolyte, and LSM cathode sequentially coated on the support. Extension of triple phase boundary (TBP) at the electrode/electrolyte interfaces was done by coating SDC thin films within the pores of the electrodes using a sol-gel technique to improve performance of the cell. An anode-supported (AS) planar cell was produced using the same procedure and technique, thus expected to have identical cell components except for the anode morphology. The AS-SS planar cell exhibited a maximum power density of 0.85 Wcm−2 which is higher than the 0.60 Wcm−2 achieved from the AS planar cell at 800°C in humidified hydrogen versus air.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

Selective-area coatings of thin active layers onto the porous ceramic support and positioning of current collectors on the anode and the cathode

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Figure 2

Cross views of (a) porous anode coated by SDC and (b) higher magnification of (a) image

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Figure 3

Exploded views of the cell holders of (a) the AS cell and (b) the AS-SS cell

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Figure 4

SEM micrographs of (a) the electrolyte surface view and (b) cross view of the AS-SS cell with the cathode, electrolyte, anode, and ceramic support in the top–down order

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Figure 5

Characteristics of the AS-SS planar cell at 600 (▴), 700 (▪), and 800°C ( • ) in humidified hydrogen and air

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Figure 6

Characteristics of the AS planar cell at 600 (▴), 700 (▪), and 800°C ( • ) in humidified hydrogen and air

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Figure 7

Impedance spectra at open circuit condition for the AS cell and the AS-SS cell in humidified hydrogen and air at 700°C

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