Covalent cross-linked anion exchange membrane based on poly(biphenyl piperidine) and poly(styrene-b-(ethylene-co-butylene)-b-styrene): preparation and properties. Issue 11 (24th July 2021) - Wang, Liujiao
ABSTRACT: Poly(biphenyl piperidine) and polystyrene‑b‑poly(ethylene-co-butylene)‑b‑polystyrene were cross-linked to form a polymer backbone, piperidine as the ionic conducting group to improve the chemical stability of the anion exchange membrane. Results indicate that the cross-linked membranes could still retain more than 95% of ion conductivity after being soaked in 1-M KOH solution at 80°C for 800 h, indicating that this cross-linked membrane exhibits good alkaline stability. The optimized microphase separation morphology could promote the ion transport (81.68 mS/cm, 80°C). The cross-linked structure helped to restrain the swelling behavior. The membrane became flexible after cross-linking, which is beneficial to the fuel-cell assembly. Graphical Abstract: uf0001