Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks

M. Santis, S.A. Freunberger, M. Papra, A. Wokaun, F.N. Büchi, Journal of Power Sources 161 (2006) 1076–1083.

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Journal Article | Published | English
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Abstract
Propagation of performance changes to adjacent cells in polymer electrolyte fuel cell stacks is studied by means of voltage monitoring and local current density measurements in peripheral cells of the stack. A technical fuel cell stack has been modified by implementing two independent reactant and coolant supplies in order to deliberately change the performance of one cell (anomalous cell) and study the coupling phenomena to adjacent cells (coupling cells), while keeping the working conditions of the later cell-group unaltered. Two anomalies are studied: (i) air starvation and (ii) thermal anomaly, in a single anomalous cell in the stack and their coupling to adjacent cells. The results have shown that anomalies inducing considerable changes in the local current density of the anomalous cell (such as air starvation) propagate to adjacent cells affecting their performance. The propagation of local current density changes takes place via the common bipolar plate due to its finite thickness and in-plane conductivity. Consequently, anomalies which do not strongly influence the local current density distribution (such as a thermal anomaly under the studied working conditions) do not propagate to adjacent cells.
Publishing Year
Date Published
2006-10-27
Journal Title
Journal of Power Sources
Volume
161
Issue
2
Page
1076-1083
ISSN
IST-REx-ID

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Santis M, Freunberger SA, Papra M, Wokaun A, Büchi FN. Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks. Journal of Power Sources. 2006;161(2):1076-1083. doi:10.1016/j.jpowsour.2006.06.007
Santis, M., Freunberger, S. A., Papra, M., Wokaun, A., & Büchi, F. N. (2006). Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks. Journal of Power Sources, 161(2), 1076–1083. https://doi.org/10.1016/j.jpowsour.2006.06.007
Santis, Marco, Stefan Alexander Freunberger, Matthias Papra, Alexander Wokaun, and Felix N. Büchi. “Experimental Investigation of Coupling Phenomena in Polymer Electrolyte Fuel Cell Stacks.” Journal of Power Sources 161, no. 2 (2006): 1076–83. https://doi.org/10.1016/j.jpowsour.2006.06.007.
M. Santis, S. A. Freunberger, M. Papra, A. Wokaun, and F. N. Büchi, “Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks,” Journal of Power Sources, vol. 161, no. 2, pp. 1076–1083, 2006.
Santis M, Freunberger SA, Papra M, Wokaun A, Büchi FN. 2006. Experimental investigation of coupling phenomena in polymer electrolyte fuel cell stacks. Journal of Power Sources. 161(2), 1076–1083.
Santis, Marco, et al. “Experimental Investigation of Coupling Phenomena in Polymer Electrolyte Fuel Cell Stacks.” Journal of Power Sources, vol. 161, no. 2, Elsevier, 2006, pp. 1076–83, doi:10.1016/j.jpowsour.2006.06.007.

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