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Low-Temperature Operating Micro Solid Oxide Fuel Cells with Perovskite-type Proton Conductors

Published online by Cambridge University Press:  13 September 2011

Hiroo Yugami ,
Kensuke Kubota ,
Yu Inagaki ,
Fumitada Iguchi ,
Shuji Tanaka ,
Noriko Sata  and
Masayoshi Esashi
Hiroo Yugami
Affiliation:
Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, 980-8579, Sendai, Japan.
Kensuke Kubota
Affiliation:
Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, 980-8579, Sendai, Japan.
Yu Inagaki
Affiliation:
Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, 980-8579, Sendai, Japan.
Fumitada Iguchi
Affiliation:
Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, 980-8579, Sendai, Japan.
Shuji Tanaka
Affiliation:
Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, 980-8579, Sendai, Japan.
Noriko Sata
Affiliation:
Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, 980-8579, Sendai, Japan.
Masayoshi Esashi
Affiliation:
Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, 980-8579, Sendai, Japan.
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Abstract

Micro-solid oxide fuel cells (Micro-SOFCs) with yttrium-doped barium zirconate (BZY) and strontium and cobalt-doped lanthanum scandate (LSScCo) electrolytes were fabricated for low-temperature operation at 300 °C. The micro-SOFC with a BZY electrolyte could operate at 300 °C with an open circuit voltage (OCV) of 1.08 V and a maximum power density of 2.8 mW/cm2. The micro-SOFC with a LSScCo electrolyte could operate at 370 °C; its OCV was about 0.8 V, and its maximum power density was 0.6 mW/cm2. Electrochemical impedance spectroscopy revealed that the electrolyte resistance in both the micro-SOFCs was lower than 0.1 Ωcm2, and almost all of the resistance was due to anode and cathode reactions. Although the obtained maximum power density was not sufficient for practical applications, improvement of electrodes will make these micro-SOFCs promising candidates for power sources of mobile electronic devices.

Keywords

ceramicphysical vapor deposition (PVD)microelectro-mechanical (MEMS)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1330: Symposium J – Protons in Solids , 2011 , mrss11-1330-j06-01
Copyright
Copyright © Materials Research Society 2011

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References

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