Cationic groups in polystyrene/O-PBI blends influence performance and hydrogen crossover in AEMWE†
Linus
Hager, 
*ab
Manuel
Hegelheimer,
ab
Julian
Stonawski,
ab
Pradipkumar
Leuaa,
c
Christodoulos
Chatzichristodoulou,
c
Andreas
Hutzler,
a
Thomas
Böhm,
a
Simon
Thiele
ab
and
Jochen
Kerres
*ad
*ab
Manuel
Hegelheimer,
ab
Julian
Stonawski,
ab
Pradipkumar
Leuaa,
c
Christodoulos
Chatzichristodoulou,
c
Andreas
Hutzler,
a
Thomas
Böhm,
a
Simon
Thiele
ab
and
Jochen
Kerres
*ad
Abstract
This study examines the effect of various quaternary ammonium groups on AEMWE performance and hydrogen crossover in blends of quaternized polystyrenes with O-PBI. Due to their higher hydroxide conductivity (69 mS cm−1 at 80 °C, 90% RH), trimethylammonium groups enable AEMWE to reach 1.0 A cm−2 at 2.0 V. The trimethylammonium groups exhibit low hydrogen crossover, ranging from 1.5% to 0.3%, across current densities of 50 to 1000 mA cm−2. Low hydrogen crossover is essential for AEMWE in terms of safety and efficiency.
- This article is part of the themed collection: Chemistry for a Sustainable World – Celebrating Our Community Tackling Global Challenges
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