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Research Papers

Novel Electrode-Supported Honeycomb Solid Oxide Fuel Cell: Design and Fabrication

[+] Author and Article Information
Toshiaki Yamaguchi1

 National Institute of Advanced Industrial Science and Technology (AIST), Shimo-shidami, Moriyama-ku, Nagoya, 463-8560, Japan

Toshio Suzuki, Yoshinobu Fujishiro, Masanobu Awano

 National Institute of Advanced Industrial Science and Technology (AIST), Shimo-shidami, Moriyama-ku, Nagoya, 463-8560, Japan

Sota Shimizu

 Fine Ceramics Research Association (FCRA), Shimo-shidami, Moriyama-ku, Nagoya, 463-8561, Japan

1

Corresponding author.

J. Fuel Cell Sci. Technol 7(4), 041001 (Apr 05, 2010) (4 pages) doi:10.1115/1.3206975 History: Received June 24, 2008; Revised July 09, 2008; Published April 05, 2010; Online April 05, 2010

We have developed a novel and highly effective electrode-supported solid oxide fuel cell (SOFC) with honeycomb structure for intermediate temperature operation. Honeycomb-supported SOFC is known as one of the most compact SOFCs due to the large electrode area per unit volume, which is attractive with regard to space saving and cost reduction. In this study, we summarized the design of the channel shape, size, and sequence using numerical simulation and technologies to realize the designed honeycomb SOFC fabrication. The calculation results showed that the wall thickness and the channel size of the honeycomb had to be less than 0.22 mm and more than 0.3 mm, respectively, for the sufficient net channel surface and the acceptable pressure drop. Also, a cathode-honeycomb-supported SOFC can be the more efficient form with lower current collection resistance, as compared with the anode-supported type. The actual fabricated honeycomb SOFC exhibited a high volumetric power density above 1W/cm3 at 650°C under wet H2 fuel flow.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Shape, dimension, and sequence of circle-shaped channels

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Figure 2

Equivalent electric circuit of an electrode-supported SOFC with honeycomb structure

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Figure 3

Total channel surface area with various honeycomb wall thickness as a function of the channel size

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Figure 4

Relation between ΔP2/ΔP1 and r1/r2 ratios under the condition that total electrode area and honeycomb size are constant

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Figure 5

Current from electrode-supported SOFCs with honeycomb structure, which is obtained by a numerical analysis: (a) cathode- and (b) anode-honeycomb supports

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Figure 6

Microstructures of the prepared cathode-supported SOFC with honeycomb structure

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Figure 7

I-V characteristics of the prepared cathode-honeycomb supported SOFC

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