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Miniaturization limits for single-chamber micro-solid oxide fuel cells with coplanar electrodes

Melanie Kuhn, Teko W. Napporn, Michel Meunier, Srikar Vengallatore, Daniel Therriault

Article (2009)

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Abstract

Single-chamber solid oxide fuel cells with coplanar microelectrodes were operated in methane-air mixtures (Rmix = 2) at 700°C. The performance of cells with one pair of NiO-YSZ (yttria stabilized zirconia) anode and (La0.8Sr0.2)0.98MnO3-YSZ cathode, arranged parallel on a YSZ electrolyte substrate, was found to be significantly dependent on the electrode width. For an interelectrode gap of ~250m, cells with average electrode widths exceeding ~850m could establish a stable open circuit voltage (OCV) of ~0.8 V, while those with widths less than ~550 µm could not establish any OCV. In the intermediate range, the cells exhibited significant fluctuations in voltage and power under our testing conditions. This behavior suggests that a lower limit to electrode dimensions exists for cells with single electrode pairs, below which neither a stable difference in oxygen partial pressure, nor an OCV, can be established. Conversely, increasing the electrode width imposes a penalty in the form of an increase in the ohmic resistance. However, both size limits can be circumvented by employing multiple pairs of microscale electrodes in an interdigitated configuration.

Uncontrolled Keywords

Solid oxide fuel cell; Single chamber; Micro cell; Coplanar electrodes; Ceramic materials

Department: Department of Mechanical Engineering
Department of Engineering Physics
Funders: Fonds Québécois de la Recherche sur la Nature et les Technologies (FQRNT), Canadian Foundation for Innovation, Government of Québec (Doctoral research scholarship by FQRNT)
PolyPublie URL: https://publications.polymtl.ca/10376/
Journal Title: Journal of Power Sources (vol. 194, no. 2)
Publisher: Elsevier
DOI: 10.1016/j.jpowsour.2009.05.034
Official URL: https://doi.org/10.1016/j.jpowsour.2009.05.034
Date Deposited: 04 Jul 2022 15:53
Last Modified: 19 Nov 2022 12:24
Cite in APA 7: Kuhn, M., Napporn, T. W., Meunier, M., Vengallatore, S., & Therriault, D. (2009). Miniaturization limits for single-chamber micro-solid oxide fuel cells with coplanar electrodes. Journal of Power Sources, 194(2), 941-949. https://doi.org/10.1016/j.jpowsour.2009.05.034

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