30 μm thin hexamethyl-p-terphenyl poly(benzimidazolium) anion exchange membrane for vanadium redox flow batteries

Journal article


Publication Details

Author(s): Shanahan B, Böhm T, Britton B, Holdcroft S, Zengerle R, Vierrath S, Thiele S, Breitwieser M
Journal: Electrochemistry Communications
Publication year: 2019
Volume: 102
Pages range: 37-40
ISSN: 1388-2481


Abstract

We present the first results of an anion exchange ionomer membrane, hexamethyl-p-terphenyl poly(benzimidazolium) (HMT-PMBI), in a vanadium redox flow battery. Anion exchange membranes exhibit superior vanadium crossover suppression compared to proton exchange membranes due to the Gibbs–Donnan effect. HMT-PMBI was benchmarked against a similarly thin Nafion XL membrane which allowed us to compare differences based solely on chemical properties of the ionomer materials. We report cycling data of 45 cycles at a current density of 150 mA/cm
2
with excellent coulombic efficiency of >99.4%, energy efficiency of 80.6–74.2% and a low ohmic resistance of 0.219–0.255 Ω cm
2
. In addition, a three times lower self-discharge rate is obtained for the HMT-PMBI membrane compared to Nafion XL. HMT-PMBI is therefore a potential alternative for PFSA based ionomers in VRFB applications.


FAU Authors / FAU Editors

Thiele, Simon Prof. Dr.-Ing.
Professur für Electrocatalytic Interface Engineering (HIERN)


External institutions with authors

Albert-Ludwigs-Universität Freiburg
Simon Fraser University


How to cite

APA:
Shanahan, B., Böhm, T., Britton, B., Holdcroft, S., Zengerle, R., Vierrath, S.,... Breitwieser, M. (2019). 30 μm thin hexamethyl-p-terphenyl poly(benzimidazolium) anion exchange membrane for vanadium redox flow batteries. Electrochemistry Communications, 102, 37-40. https://dx.doi.org/10.1016/j.elecom.2019.03.016

MLA:
Shanahan, Brian, et al. "30 μm thin hexamethyl-p-terphenyl poly(benzimidazolium) anion exchange membrane for vanadium redox flow batteries." Electrochemistry Communications 102 (2019): 37-40.

BibTeX: 

Last updated on 2019-15-05 at 10:08