Poly(vinyl alcohol)-Based Anion Exchange Membranes for Alkaline Direct Ethanol Fuel Cells

*Asep Muhamad Samsudin scopus  -  Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, Austria
Sigrid Wolf scopus  -  Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, Austria
Michaela Roschger scopus  -  Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, Austria
Viktor Hacker orcid scopus  -  Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, Austria
Received: 28 Sep 2020; Revised: 20 Dec 2020; Accepted: 12 Feb 2021; Published: 1 Aug 2021; Available online: 18 Feb 2021.
Open Access Copyright (c) 2021 The Authors. Published by Centre of Biomass and Renewable Energy (CBIORE)
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Citation Format:
Crosslinked anion exchange membranes (AEMs) made from poly(vinyl alcohol) (PVA) as a backbone polymer and different approaches to functional group introduction were prepared by means of solution casting with thermal and chemical crosslinking. Membrane characterization was performed by SEM, FTIR, and thermogravimetric analyses. The performance of AEMs was evaluated by water uptake, swelling degree, ion exchange capacity, OH- conductivity, and single cell tests. A combination of quaternized ammonium poly(vinyl alcohol) (QPVA) and poly(diallyldimethylammonium chloride) (PDDMAC) showed the highest conductivity, water uptake, and swelling among other functional group sources. The AEM with a combined mass ratio of QPVA and PDDMAC of 1:0.5 (QPV/PDD0.5) has the highest hydroxide conductivity of 54.46 mS cm-1. The single fuel cell tests with QPV/PDD0.5 membrane yield the maximum power density and current density of 8.6 mW cm-2 and 47.6 mA cm-2 at 57 °C. This study demonstrates that PVA-based AEMs have the potential for alkaline direct ethanol fuel cells (ADEFCs) application.
Keywords: anion exchange membranes; PVA; PDDA; fuel cells; cross-linking
Funding: Austrian Science Fund (FWF) under contract I 3871-N37 ; The Indonesia-Austria Scholarship Programme (IASP)

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