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RESEARCH PAPERS

Fabrication and Performance of Anode-Supported Micro-Tubular Solid Oxide Fuel Cells

[+] Author and Article Information
Jakub Pusz

Materials Science and Engineering Department, University of Connecticut, 44 Weaver Road, Storrs, CT 06269jpusz@engr.uconn.edu

Alidad Mohammadi

Materials Science and Engineering Department, University of Connecticut, 44 Weaver Road, Storrs, CT 06269

Nigel M. Sammes

Mechnical Engineering Department, University of Connecticut, 44 Weaver Road, Storrs, CT 06269

J. Fuel Cell Sci. Technol 3(4), 482-486 (Mar 30, 2006) (5 pages) doi:10.1115/1.2357747 History: Received December 01, 2005; Revised March 30, 2006

A solid oxide fuel cell was fabricated using standard NiO/8YSZ cermet anode, 8mol% yttria stabilized zirconia (YSZ) electrolyte, and lanthanum strontium manganite cathode. The anodes were extruded using an hydraulic ram extruder. An electrolyte was deposited using a novel technique allowing obtaining a 35μm thin and dense YSZ layer. The cathode was deposited by brush painting. The cells were operated under different temperature and fuel conditions, and showed excellent performance of up approximately 0.6Wcm2 at 890°C. Performance data as well as scanning electron microscopy micrographs of the cells are presented.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

SEM micrograph of (a) non-reduced anode and (b) reduced anode surface

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Figure 2

Anode tubes after drying process showing circumferential cracks

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Figure 3

(a) The ram extruder by Loomis; (b) the tube holders that prevent tubes from bending during the drying process

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Figure 4

SEM micrograph of NiO anode and YSZ electrolyte layer

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Figure 5

SEM micrograph of a solid oxide fuel cell cross section

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Figure 6

V-I curves of a single cell run on humidified hydrogen at 800°C

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Figure 7

V-I curves of the same cell performed after operation of the cell under load conditions for t=0h, t=22h, t=28h. The cell was run on humidified hydrogen at 800°C.

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Figure 8

V-I curves performed at the same cell at different temperatures running on humidified hydrogen

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Figure 9

The single solid oxide fuel cell degradation diagram run on dry hydrogen at 800°C

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Figure 10

SEM micrograph of a tubular SOFC cell cross section after 260h of operation under load conditions running on dry hydrogen

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Figure 11

SEM micrograph of a LSM cathode surface with a visible silver deposition

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