Show simple item record

dc.contributor.authorNatarajan, Dilip
dc.contributor.authorVan Nguyen, Trung
dc.date.accessioned2005-04-17T15:49:27Z
dc.date.available2005-04-17T15:49:27Z
dc.date.issued2004-09-03
dc.identifier.citationNatarajan, D; Van Nguyen, T. Effect of electrode configuration and electronic conductivity on current density distribution measurements in PEM fuel cells. JOURNAL OF POWER SOURCES. September 3 2004. 135:95-109
dc.identifier.otherISI:000223964400014
dc.identifier.urihttp://hdl.handle.net/1808/298
dc.description.abstractCurrent density and potential distribution measurements were conducted using a segmented current collector and flow field setup on membrane electrode assemblies prepared with segmented and unsegmented electrodes made from two different types of commercially available gas diffusion layers. Both galvanostatic and potentiostatic discharge modes were employed. Irrespective of the type of gas diffusion layer, when a common electrode was employed, significant performance variations were encountered between current collector segments in the constant voltage mode, while the segment to segment variations were minimal in the constant current mode. Both types of discharge modes showed negligible variations between segments in the case of segmented electrode. A simple mathematical model was developed to assist in the interpretation of the experimental results. The differences in contact resistances between the current collectors and the gas diffusion layer, especially on the cathode side have been identified as the primary reason for the experimentally observed behavior. Based on the results presented here, segmenting the electrode along with the current collector is recommended for current distribution studies. When using a common electrode, only the galvanostatic mode is preferred to minimize contact artifacts. (C) 2004 Elsevier B.V. All rights reserved.
dc.format.extent626972 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherELSEVIER SCIENCE BV
dc.subjectPem fuel cells
dc.subjectConventional gas distributor
dc.subjectCurrent density distribution
dc.subjectSegmented electrode
dc.subjectMathematical models
dc.titleEffect of electrode configuration and electronic conductivity on current density distribution measurements in PEM fuel cells
dc.typeArticle
dc.identifier.doi10.1016/j.jpowsour.2004.03.063
dc.rights.accessrightsopenAccess


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record