Poly(Ethylene Piperidinium)s for Anion Exchange Membranes

Abstract The lack of anion exchange membranes (AEMs) that possess both high hydroxide conductivity and stable mechanical chemical properties poses a major challenge to the development high‐performance fuel cells. Improving one side balance between stability usually means sacrificing other. Herein, we used facile, high‐yield reactions design synthesize piperidinium polymer with polyethylene backbone for AEM cell applications. To improve performance, introduced ionic crosslinking into high‐cationic‐ratio AEMs suppress water uptake swelling while further improving conductivity. Remarkably, PEP80‐20PS achieved 354.3 mS cm −1 at 80 °C remaining mechanically stable. Compared base PEP80, decreased by 69 % from 813 350 %, substantially 85 350.0 50.2 °C. also showed excellent alkaline stability, 84.7 remained after 35 days treatment an aqueous KOH solution. in this study represents significant advancement toward simultaneously highly conductive