---
_id: '7322'
abstract:
- lang: eng
  text: The gas diffusion layers (GDLs) of a membrane electrode assembly (MEA) serve
    as link between flow field and porous electrode within a polymer electrolyte fuel
    cell. Beside ensuring sufficient electrical and thermal contact between the whole
    electrode area and the flow field, these typically 200–400 μm thick porous structures
    enable the access of educts to the electrode area which would be occluded by the
    flow field lands if the flow field is directly attached to the electrode. Hence,
    the characterisation of properties pertaining to mass transport of educts and
    products through these structures is indispensable whilst examining the contribution
    of the GDLs to the overall electrochemical characteristics of a MEA. A fast and
    cost effective method to measure the effective diffusivity of a GDL is presented.
    Electrochemical impedance spectroscopy is applied to measure the effective ionic
    conductivity of an electrolyte-soaked GDL. Taking advantage of the analogy between
    Ficks and Ohms law, this provides a measure for the effective diffusivity. The
    method is described in detail, including experimental as well as theoretical aspects,
    and selected results, highlighting the anisotropy and dependence on the degree
    of compression, are shown. Moreover, a two-dimensional model consisting of regularly
    spaced ellipses is developed to represent the porous structure of the GDL, and
    by using conformal maps, the agreement between this model and experiment with
    respect to the sensitivity of the effective diffusivity towards compression is
    shown.
article_processing_charge: No
article_type: original
author:
- first_name: Denis
  full_name: Kramer, Denis
  last_name: Kramer
- first_name: Stefan Alexander
  full_name: Freunberger, Stefan Alexander
  id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
  last_name: Freunberger
  orcid: 0000-0003-2902-5319
- first_name: Reto
  full_name: Flückiger, Reto
  last_name: Flückiger
- first_name: Ingo A.
  full_name: Schneider, Ingo A.
  last_name: Schneider
- first_name: Alexander
  full_name: Wokaun, Alexander
  last_name: Wokaun
- first_name: Felix N.
  full_name: Büchi, Felix N.
  last_name: Büchi
- first_name: Günther G.
  full_name: Scherer, Günther G.
  last_name: Scherer
citation:
  ama: Kramer D, Freunberger SA, Flückiger R, et al. Electrochemical diffusimetry
    of fuel cell gas diffusion layers. <i>Journal of Electroanalytical Chemistry</i>.
    2008;612(1):63-77. doi:<a href="https://doi.org/10.1016/j.jelechem.2007.09.014">10.1016/j.jelechem.2007.09.014</a>
  apa: Kramer, D., Freunberger, S. A., Flückiger, R., Schneider, I. A., Wokaun, A.,
    Büchi, F. N., &#38; Scherer, G. G. (2008). Electrochemical diffusimetry of fuel
    cell gas diffusion layers. <i>Journal of Electroanalytical Chemistry</i>. Elsevier.
    <a href="https://doi.org/10.1016/j.jelechem.2007.09.014">https://doi.org/10.1016/j.jelechem.2007.09.014</a>
  chicago: Kramer, Denis, Stefan Alexander Freunberger, Reto Flückiger, Ingo A. Schneider,
    Alexander Wokaun, Felix N. Büchi, and Günther G. Scherer. “Electrochemical Diffusimetry
    of Fuel Cell Gas Diffusion Layers.” <i>Journal of Electroanalytical Chemistry</i>.
    Elsevier, 2008. <a href="https://doi.org/10.1016/j.jelechem.2007.09.014">https://doi.org/10.1016/j.jelechem.2007.09.014</a>.
  ieee: D. Kramer <i>et al.</i>, “Electrochemical diffusimetry of fuel cell gas diffusion
    layers,” <i>Journal of Electroanalytical Chemistry</i>, vol. 612, no. 1. Elsevier,
    pp. 63–77, 2008.
  ista: Kramer D, Freunberger SA, Flückiger R, Schneider IA, Wokaun A, Büchi FN, Scherer
    GG. 2008. Electrochemical diffusimetry of fuel cell gas diffusion layers. Journal
    of Electroanalytical Chemistry. 612(1), 63–77.
  mla: Kramer, Denis, et al. “Electrochemical Diffusimetry of Fuel Cell Gas Diffusion
    Layers.” <i>Journal of Electroanalytical Chemistry</i>, vol. 612, no. 1, Elsevier,
    2008, pp. 63–77, doi:<a href="https://doi.org/10.1016/j.jelechem.2007.09.014">10.1016/j.jelechem.2007.09.014</a>.
  short: D. Kramer, S.A. Freunberger, R. Flückiger, I.A. Schneider, A. Wokaun, F.N.
    Büchi, G.G. Scherer, Journal of Electroanalytical Chemistry 612 (2008) 63–77.
date_created: 2020-01-15T12:21:57Z
date_published: 2008-01-01T00:00:00Z
date_updated: 2021-01-12T08:13:03Z
day: '01'
doi: 10.1016/j.jelechem.2007.09.014
extern: '1'
intvolume: '       612'
issue: '1'
language:
- iso: eng
month: '01'
oa_version: None
page: 63-77
publication: Journal of Electroanalytical Chemistry
publication_identifier:
  issn:
  - 1572-6657
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: Electrochemical diffusimetry of fuel cell gas diffusion layers
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 612
year: '2008'
...