ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(17)

Published: April 30, 2025

Abstract A novel alkaline anion exchange membrane was designed using poly(styrene‐b‐ethylene‐co‐butylene‐b‐styrene) (SEBS) as the backbone. Long side chains were grafted onto SEBS via a Friedel‐Crafts reaction, and cross‐linked (SEBS‐C6‐DiPRD) prepared an N‐heterocyclic crosslinker, 1,3‐N‐4‐piperidinyl propane, which features ring strain steric hindrance. The SEBS‐C6‐DiPRD exhibited ion capacity of approximately 1.8 mmol·g −1 , water uptake 85.4%, swelling ratio 24.1% at 80 °C. Thermal degradation began 370 °C, broke 310.6% stress 31.1 MPa. At operating temperature °C (typical for AEMFCs), conductivity reached 75.95 mS·cm . Notably, after 1000 hours testing under simulated AEMFC conditions, membrane's only decreased by 27.6%, demonstrating excellent long‐term stability. Under H 2 air peak power density 18.89 mW·cm −2

Language: Английский