Change search
ReferencesLink to record
Permanent link

Direct link
Saturation Dependent Effective Transport Properties of PEFC Gas Diffusion Layers
Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland .ORCID iD: 0000-0002-2346-7063
Show others and affiliations
2012 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, Vol. 159, no 9, F536-F544 p.Article in journal (Refereed) Published
Abstract [en]

Operating Polymer Electrolyte Fuel Cells (PEFC) under high current density conditions, causes significant losses related to liquid water saturation in the gas diffusion layer (GDL). The blockage of pores inside the material has a strong influence on its effective gas transport properties. Here we report on the combination of in-situ X-ray tomographic microscopy (XTM) of PEFC and the numerical determination of gas transport properties using Lattice Boltzmann and finite difference methods. The GDL domains (Toray TGP-H-060) of two identical cells, each with 11 mm(2) active area, were analyzed in sections of about 0.3 to 0.8 mm(2) size. Saturation levels between 0.1 and 0.4 were found, with higher saturation under the ribs. The saturated and the non-saturated states of the GDL samples were compared in order to quantify the dependence of gas phase permeability and effective relative diffusivity on liquid water saturation. Both these relative measures were found to follow power relationships of (1-s)(lambda), where the exponent. was approximately 3 for all cases except for the in-plane diffusivity where it was closer to 2.

Place, publisher, year, edition, pages
2012. Vol. 159, no 9, F536-F544 p.
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-104284DOI: 10.1149/2.005209jesISI: 000309104400051ScopusID: 2-s2.0-84875507259OAI: diva2:565211

QC 20121106

Available from: 2012-11-06 Created: 2012-10-31 Last updated: 2012-11-06Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Rosén, Tomas
In the same journal
Journal of the Electrochemical Society
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 22 hits
ReferencesLink to record
Permanent link

Direct link