Partially PEG‐Grafted Poly(Terphenyl Piperidinium) Anion Exchange Membranes with Balanced Properties for Alkaline Fuel Cells

• DOI: 10.1002/marc.202400336
• Publication Date: 2024-06-23T08:29:15Z
• Authors: Dongrui Chu; Runan Shao; Jingjing Zhang; Qiyu Zhou; Zhichao Zheng; Yangyang Xu; Lei Liu
• Keywords: Side chain; Alkaline fuel cell

Abstract Poly(ethylene glycol) (PEG) or oligo (ethylene (OEG) grafted anion exchange membranes (AEMs) exhibit improved ionic conductivity, high alkaline stability, and subsequent boosted AEM fuel cell performance, but too much PEG/OEG side chains may can result in a reduction the ion capacity (IEC), which have adverse effects on transport. Here, series of partially PEG‐grafted poly(terphenyl piperidinium) with different chain length are synthesized using simple postpolymerization modification to produce AEMs balanced properties. The polar flexible PEG responsible for controlled water uptake swelling, superior hydroxide conductivity (122 mS cm −1 at 80 °C an IEC 1.99 mmol g ), enhanced stability compared reference sample without grafts (PTP). More importantly, performance (AEMFC) membrane containing partial surpasses that PTP membrane, demonstrating highest peak power density 1110 mW −2 under optimized conditions. This work provides novel approach fabrication high‐performance materials properties application.