Electrotransport Properties of Perfluorinated Cation-Exchange Membranes of Various Thickness

The present work discusses the influence of the thickness of MF-4SK perfluorinated sulfonic cation-exchange membranes on their electrotransport properties in hydrochloric acid solutions. It is found that diffusion permeability and conductivity are primarily determined with the specific water content...

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Bibliographic Details
Published in:Membranes (Basel) 2023-11, Vol.13 (11), p.873
Main Authors: Falina, Irina, Loza, Natalia, Brovkina, Marina, Titskaya, Ekaterina, Timofeev, Sergey, Kononenko, Natalia
Format: Article
Language:English
Subjects:
Cation exchanging
Chemical tests and reagents
conductivity
current–voltage curve
Diffusion
diffusion permeability
Electric properties
Electrodes
Electrolytes
Electrons
Fuel cell industry
Fuel cells
Hot pressing
Humidity
Hydrochloric acid
Hydrogen as fuel
Investigations
Membranes
Moisture content
perfluorinated sulfonic cation-exchange membranes
Permeability
Polymers
proton exchange membrane fuel cell
Thickness
Water content
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Summary:The present work discusses the influence of the thickness of MF-4SK perfluorinated sulfonic cation-exchange membranes on their electrotransport properties in hydrochloric acid solutions. It is found that diffusion permeability and conductivity are primarily determined with the specific water content of the membranes and increase with their increase. Analysis of the contribution of reverse diffusion through the membrane to the value of the limiting current shows that it can reach 20% for membranes with a thickness of 60 μm. A study of the characteristics of the fuel cell with perfluorinated membranes of different thicknesses shows that the membrane thickness affects both the ohmic resistance of the membrane-electrode assembly and the diffusion limitations of proton transport in polymer electrolytes.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes13110873