Research Papers

Fabrication of Anode-Supported Tubular Solid Oxide Fuel Cell Using an Extrusion and Vacuum Infiltration Techniques

[+] Author and Article Information
Jung-Hoon Song1

Department of Metallurgical and Materials Engineering, Colorado School of Mines, 1500 Illinois Street, Golden, CO 80401

Nigel M. Sammes

Department of Metallurgical and Materials Engineering, Colorado School of Mines, 1500 Illinois Street, Golden, CO 80401


Present address: Research Institute of Industrial Science and Technology (RIST), 32 Hyoja-Dong, Nam-Gu, Pohang City, 790-330, Gyeong Buk, South Korea.

J. Fuel Cell Sci. Technol 7(6), 061013 (Aug 25, 2010) (5 pages) doi:10.1115/1.4001324 History: Received September 16, 2009; Revised December 15, 2009; Published August 25, 2010; Online August 25, 2010

A simple and mass productive extrusion technique was applied to fabricate anode-supported tubular solid oxide fuel cells (SOFCs). A standard NiO/8YSZ (nickel oxide/8 mol % yttria stabilized zirconia) cermet anode, 8YSZ electrolyte, and lanthanum strontium manganite (La0.8Sr0.2MnO3) cathode were used as the material components. Secondary electron microscopy images indicated that vacuum infiltration method successfully generated the thin electrolyte layer (about 15μm) with a structurally effective three phase boundaries. Fabricated unit cell showed the open circuit voltage of 1.12 V without any fuel leaking problems. Electrochemical tests showed a maximum power density up to 0.30Wcm2 at 800°C, implying the good performance as tubular SOFCs. This study verified that the extrusion aided by vacuum infiltration process could be a promising technique for mass production of tubular SOFCs.

Copyright © 2010 by American Society of Mechanical Engineers
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Figure 1

Single cell fabrication process

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Figure 2

Unit cell configuration: (a) unit cell with current collector, (b) cross section of the single cell, and (c) anode current collector

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Figure 3

Various kinds of fabricated cells: (a) fired anode tube, (b) anode-supported electrolyte, (c) single cell, (d) single cell with current collector, and (e) the final cell after operation

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Figure 4

SEM image of fabricated single cell: (a) cross section of the fabricated unit cell, (b) surface of electrolyte, (c) anode layer contacted on electrolyte layer, and (d) cathode layer contacted on electrolyte layer

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Figure 5

Structure formation mechanism of infiltration method

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Figure 6

OCV variation after reduction process

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Figure 7

(a) V-I characteristics for the fabricated unit cell and (b) the relations between fuel utilization (%) and cell voltage

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Figure 8

Impedance spectra for the fabricated unit cell



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