Composite membranes for alkaline electrolysis based on polysulfone and mineral fillers

Burnat, Dariusz Artur; Schlupp, Meike; Wichser, Adrian; Lothenbach, Barbara; Gorbar, Michal; Züttel, Andreas; Vogt, Ulrich F.

doi:10.1016/j.jpowsour.2015.04.066

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Composite membranes for alkaline electrolysis based on polysulfone and mineral fillers
Authors:	Burnat, Dariusz Artur Schlupp, Meike Wichser, Adrian Lothenbach, Barbara Gorbar, Michal Züttel, Andreas Vogt, Ulrich F.
DOI:	10.1016/j.jpowsour.2015.04.066
Published in:	Journal of Power Sources
Volume(Issue):	291
Page(s):	163
Pages to:	172
Issue Date:	2015
Publisher / Ed. Institution:	Elsevier
ISSN:	0378-7753 1873-2755
Language:	English
Subject (DDC):	620: Engineering
Abstract:	Mineral-based membranes for high temperature alkaline electrolysis were developed by a phase inversion process with polysulfone as binder. The long-term stability of new mineral fillers: wollastonite, forsterite and barite was assessed by 8000 h-long leaching experiments (5.5 M KOH, 85°C) combined with thermodynamic modelling. Barite has released only 6.22 10-4 M of Ba ions into the electrolyte and was selected as promising filler material, due to its excellent stability. Barite-based membranes, prepared by the phase inversion process, were further studied. The resistivity of these membranes in 5.5 M KOH was investigated as a function of membrane thickness and total porosity, hydrodynamic porosity as well as gas purities determined by conducting electrolysis at ambient conditions. It was found that a dense top layer resulting from the phase inversion process, shows resistivity values up to 451.0 ± 22 Ω cm, which is two orders of magnitude higher than a porous bulk membrane microstructure (3.89 Ω cm). Developed membranes provided hydrogen purity of 99.83 at 200 mA cm-2, which is comparable to previously used chrysotile membranes and higher than commercial state-of-the-art Zirfon 500utp membrane. These cost-effective polysulfone – barite membranes are promising candidates as asbestos replacement for commercial applications.
URI:	https://digitalcollection.zhaw.ch/handle/11475/15272
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Materials and Process Engineering (IMPE)
Appears in collections:	Publikationen School of Engineering

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Burnat, D. A., Schlupp, M., Wichser, A., Lothenbach, B., Gorbar, M., Züttel, A., & Vogt, U. F. (2015). Composite membranes for alkaline electrolysis based on polysulfone and mineral fillers. Journal of Power Sources, 291, 163–172. https://doi.org/10.1016/j.jpowsour.2015.04.066

Burnat, D.A. et al. (2015) ‘Composite membranes for alkaline electrolysis based on polysulfone and mineral fillers’, Journal of Power Sources, 291, pp. 163–172. Available at: https://doi.org/10.1016/j.jpowsour.2015.04.066.

D. A. Burnat et al., “Composite membranes for alkaline electrolysis based on polysulfone and mineral fillers,” Journal of Power Sources, vol. 291, pp. 163–172, 2015, doi: 10.1016/j.jpowsour.2015.04.066.

BURNAT, Dariusz Artur, Meike SCHLUPP, Adrian WICHSER, Barbara LOTHENBACH, Michal GORBAR, Andreas ZÜTTEL und Ulrich F. VOGT, 2015. Composite membranes for alkaline electrolysis based on polysulfone and mineral fillers. Journal of Power Sources. 2015. Bd. 291, S. 163–172. DOI 10.1016/j.jpowsour.2015.04.066

Burnat, Dariusz Artur, Meike Schlupp, Adrian Wichser, Barbara Lothenbach, Michal Gorbar, Andreas Züttel, and Ulrich F. Vogt. 2015. “Composite Membranes for Alkaline Electrolysis Based on Polysulfone and Mineral Fillers.” Journal of Power Sources 291: 163–72. https://doi.org/10.1016/j.jpowsour.2015.04.066.

Burnat, Dariusz Artur, et al. “Composite Membranes for Alkaline Electrolysis Based on Polysulfone and Mineral Fillers.” Journal of Power Sources, vol. 291, 2015, pp. 163–72, https://doi.org/10.1016/j.jpowsour.2015.04.066.