Journal article

Electrochemical characterization of porous diaphragms in development for gas separation

  • Stojadinović, J. EMPA, Materials Science and Technology, Hydrogen & Energy, Dübendorf, Switzerland
  • Wiedenmann, Daniel EMPA, Materials Science and Technology, Hydrogen & Energy, Dübendorf, Switzerland - University of Fribourg, Department Geosciences and FRIMAT, Fribourg, Switzerland
  • Gorbar, M. EMPA, Materials Science and Technology, Hydrogen & Energy, Dübendorf, Switzerland
  • Mantia, F. La University of Bochum, Department Chemistry and Biochemistry, Germany
  • Suarez, L. EMPA, Materials Science and Technology, Hydrogen & Energy, Dübendorf, Switzerland
  • Herzog, V. Zakaznova EMPA, Materials Science and Technology, Hydrogen & Energy, Dübendorf, Switzerland
  • Vogt, U. F. EMPA, Materials Science and Technology, Hydrogen & Energy, Dübendorf, Switzerland
  • Grobéty, Bernard University of Fribourg, Department Geosciences and FRIMAT, Fribourg, Switzerland
  • Züttel, Andreas EMPA, Materials Science and Technology, Hydrogen & Energy, Dübendorf, Switzerland
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    24.08.2012
Published in:
  • ECS Electrochemistry Letters. - 2012, vol. 1, no. 4, p. F25-F28
English The alkaline electrolyzer industry is facing the imminent necessity of replacing the asbestos diaphragms with a separator made of a new environmentally friendly material. The influence of a diaphragm's material and porosity on the ionic conductivity was studied for asbestos, zirconium dioxide, wollastonite and olivine diaphragms. Developed electrochemical impedance spectroscopy (EIS) set-up with four-electrode cell offers the possibility for an accurate measurement of diaphragms’ ionic conductivity and enables its correlation to the materials porosity and tortuosity. The ion conductivity of investigated diaphragms approaches zero value for total porosities below 20% and increases when increasing porosities in agreement with Archie's law.
Faculty
Faculté des sciences et de médecine
Department
Département de Géosciences
Language
  • English
Classification
Chemistry
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/302444
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