Performance of a Porous Electrolyte in Single-Chamber SOFCs

Abstract

A cell which consists of a porous 18 µm thick Y-doped ZrO2 (YSZ) electrolyte (23±3 vol % open porosity) on a NiO-YSZ anode substrate and a cathode using (La, Sr)(Co, Fe)O3 has been investigated in the single-chamber configuration. The cell performance and catalytic activity of the anode was measured in a flowing air-methane gas mixture with various flow rates. The results showed that the open-circuit voltage and the power density increased as the gas flow rate increased. The cell generated an open-circuit voltage of about 0.78 V, which was only about 0.1 V lower than that observed with dense electrolyte specimens. A maximum power density of 660 mW cm-2 (0.44 V) was obtained at set temperature = 606°C (cell temperature = 744°C) in the flow rate of 900 cm3 min-1, where the current efficiency was about 5% determined from fuel consumption.

Department(s)

Materials Science and Engineering

Sponsor(s)

University of Missouri Research Board

Keywords and Phrases

Samarium; Sm-Doped Ceria; Solid Oxide Fuel Cells

International Standard Serial Number (ISSN)

0013-4651

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2005 the Electrochemical Society (ECS), All rights reserved.

Publication Date

01 Mar 2005

Link to Full Text

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