Branched Poly(Aryl Piperidinium) Membranes for Anion-Exchange Membrane Fuel Cells.

ABSTRACT: Anion-exchange membrane fuel cells (AEMFCs) are a promising, next-generation fuel cell technology. AEMFCs require highly conductive and robust anion-exchange membranes (AEMs), which are challenging to develop due to the tradeoff between conductivity and water uptake. Here we report a method to prepare high-molecular-weight branched poly(aryl piperidinium) AEMs. We show that branching reduces water uptake, leading to improved dimensional stability. The optimized membrane, b-PTP-2.5, exhibits simultaneously high OH^- conductivity (>145 mS cm^-1 at 80 °C), high mechanical strength and dimensional stability, good processability, and excellent alkaline stability (>1500 h) in 1 M KOH at 80 °C. AEMFCs based on b-PTP-2.5 reached peak power densities of 2.3 W cm^-2 in

SUBMITTER: Wu X 

PROVIDER: S-EPMC9304273 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature