Journal Article

PreJuSER-49918

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Model of Direct Methanol Fuel Cell stack: local resistive 'spots' and the stack performance

Kulikovsky, A. A.FZJ*

2006
Electrochemical Society Pennington, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/2879  doi:10.1149/1.2213460

Abstract: We report on a model of a direct methanol fuel cell stack. The model is based on our recent model of a single cell with parallel straight channels. The stack model accounts for voltage loss due to in-plane currents in the bipolar plates and local 'spots' of contact resistance. A 100 cell stack with a various number of spots is simulated. The effect of spots is twofold: they (i) increase local current and polarization voltages in the unaffected part of the cells, and (ii) induce in-plane parasitic current in bipolar plates. The growth of local current in the unaffected part of the cells reduces limiting current density of the stack. The stronger stack contamination with the spots, the lower the limiting current density. In the studied range of parameters, voltage loss in the bipolar plates is negligible.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Energieverfahrenstechnik (IWV-3)

Research Program(s):

1. Rationelle Energieumwandlung (P12)

Appears in the scientific report 2006
Notes: � The Electrochemical Society, Inc. [year]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archiv

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