Anion Exchange Membranes Based on Polystyrene- Block -Poly(ethylene- ran -butylene)- Block -Polystyrene Triblock Copolymers: Cation Stability and Fuel Cell Performance

  • Wang Z
  • Parrondo J
  • Ramani V
N/ACitations
Citations of this article
23Readers
Mendeley users who have this article in their library.

Abstract

© The Author(s) 2017. Published by ECS. All rights reserved. A series of polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS)-based anion exchange membranes (AEMs) were synthesized via chloromethylation of SEBS followed by quaternization with trimethylamine (TMA). SEBS-based AEMs functionalized with TMA + cations exhibited a hydroxide ion conductivity of 136 mS/cm at 70°C. This membrane exhibited a phase-separated morphology with wide and interconnected ionic channels as observed by atomic force microscopy. Poly (phenylene oxide) (PPO)-based AEMs with quaternary benzyl-trimethylammonium (TMA + ) and quaternary benzyl-tris(2,4,6-trimethoxyphenyl) phosphonium (TTMPP + ) and PPO-based AEMs with hexyl pendant chains were also synthesized and evaluated as binders in AMFC electrodes. PPO-based AEMs functionalized with TTMPP + demonstrated the best ex situ alkaline stability, losing only 9% of their ion-exchange-capacity after 30 days in 1M KOH (at 60°C). The best in situ stability was achieved by SEBS-based MEAs (as membrane and as binder in the electrodes); The peak power density dropped approx. 35% after holding the cell at a constant voltage of 0.55V for 12 hours. Fuel cell performance with SEBS-based AEMs resulted in peak power densities of 300 mW/cm 2 at 70°C. The optimum performance was obtained with MEAs made with SEBS-based AEMs and PPO-based ionomers containing a hexyl pendant chain.

Cite

CITATION STYLE

APA

Wang, Z., Parrondo, J., & Ramani, V. (2017). Anion Exchange Membranes Based on Polystyrene- Block -Poly(ethylene- ran -butylene)- Block -Polystyrene Triblock Copolymers: Cation Stability and Fuel Cell Performance . Journal of The Electrochemical Society, 164(12), F1216–F1225. https://doi.org/10.1149/2.1561712jes

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free