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Electrolyte and Cathode Studies for Micro-Solid Oxide Fuel Cell

Published online by Cambridge University Press:  01 February 2011

Yan Yan ,
Janine Conde  and
Paul Muralt
Yan Yan
Affiliation:
yan.yan@epfl.ch, EPFL, Laboratoire de Céramique, Lausanne, Switzerland
Janine Conde
Affiliation:
janine.conde@epfl.ch, EPFL, Laboratoire de Céramique, Lausanne, Switzerland
Paul Muralt
Affiliation:
paul.muralt@epfl.ch, EPFL, Laboratoire de Céramique, Lausanne, Switzerland
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Abstract

Sputter deposited YSZ thin films were studied for the application as electrolyte membrane in micro solid oxide fuel cells. A new micro-machined test structure was developed to test 200 μm fuel cell membranes that are integrated onto silicon substrates. The membranes are liberated by means of deep silicon dry etching from the backside, and both contacts are situated on the front side of the wafer. Annular Pt electrodes provide contacts to specific anode and cathode layers. Preliminary tests are reported for the situation without specific electrodes. At 450 °C, an OCV of 570 mV, and a maximal power of about 0.55 mW/cm2 is obtained. LaSrMnO electrodes deposited by pulsed laser deposition were evaluated by electrical impedance spectroscopy. The dense films yielded too high ASR values. Interestingly, these could be reduced by applying a DC bias voltage.

Keywords

ionic conductorthin filmenergy generation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1256: Symposium N – Functional Oxide Nanostructures and Heterostructures , 2010 , 1256-N16-50
Copyright
Copyright © Materials Research Society 2010

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