Michaela Roschger (Author), Sigrid Wolf (Author), Andreas Billiani (Author), Kurt Mayer (Author), Maša Hren (Author), Selestina Gorgieva (Author), Boštjan Genorio (Author), Viktor Hacker (Author)

Abstract

This study provides a comparison of different commercially available low-cost anion exchange membranes (AEMs), a microporous separator, a cation exchange membrane (CEM), and an anionic-treated CEM for their application in the liquid-feed alkaline direct ethanol fuel cell (ADEFC). Moreover, the effect on performance was evaluated taking two different modes of operation for the ADEFC, with AEM or CEM, into consideration. The membranes were compared with respect to their physical and chemical properties, such as thermal and chemical stability, ion-exchange capacity, ionic conductivity, and ethanol permeability. The influence of these factors on performance and resistance was determined by means of polarization curve and electrochemical impedance spectra (EIS) measurements in the ADEFC. In addition, the influence of two different commercial ionomers on the structure and transport properties of the catalyst layer and on the performance were analyzed with scanning electron microscopy, single cell tests, and EIS. The applicability barriers of the membranes were pointed out, and the ideal combinations of membrane and ionomer for the liquid-feed ADEFC achieved power densities of approximately 80 mW cm–2 at 80 °C.

Keywords

bioetanol;elektrode;fluoropolimeri;ionomeri;membrane;bioethanol;electrodes;fluoropolymers;ionomers;membranes;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: ACS Publications (American Chemical Society)
UDC: 543:66
COBISS: 155012867 Link will open in a new window
ISSN: 2470-1343
Views: 10
Downloads: 0
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: bioetanol;elektrode;fluoropolimeri;ionomeri;membrane;
Type (COBISS): Article
Pages: [13] str. A-M
Chronology: June 2023
DOI: 10.1021/acsomega.3c01564
ID: 23256009
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