---
res:
  bibo_abstract:
  - 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.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Denis
      foaf_name: Kramer, Denis
      foaf_surname: Kramer
  - foaf_Person:
      foaf_givenName: Stefan Alexander
      foaf_name: Freunberger, Stefan Alexander
      foaf_surname: Freunberger
      foaf_workInfoHomepage: http://www.librecat.org/personId=A8CA28E6-CE23-11E9-AD2D-EC27E6697425
    orcid: 0000-0003-2902-5319
  - foaf_Person:
      foaf_givenName: Reto
      foaf_name: Flückiger, Reto
      foaf_surname: Flückiger
  - foaf_Person:
      foaf_givenName: Ingo A.
      foaf_name: Schneider, Ingo A.
      foaf_surname: Schneider
  - foaf_Person:
      foaf_givenName: Alexander
      foaf_name: Wokaun, Alexander
      foaf_surname: Wokaun
  - foaf_Person:
      foaf_givenName: Felix N.
      foaf_name: Büchi, Felix N.
      foaf_surname: Büchi
  - foaf_Person:
      foaf_givenName: Günther G.
      foaf_name: Scherer, Günther G.
      foaf_surname: Scherer
  bibo_doi: 10.1016/j.jelechem.2007.09.014
  bibo_issue: '1'
  bibo_volume: 612
  dct_date: 2008^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/1572-6657
  dct_language: eng
  dct_publisher: Elsevier@
  dct_title: Electrochemical diffusimetry of fuel cell gas diffusion layers@
...