Azide-assisted crosslinked quaternized polysulfone with reduced graphene oxide for highly stable anion exchange membranes

A covalent crosslinking structure was formed between reduced graphene (rGO) and quaternized polyether sulfone (QPSU) by nitrene addition reaction to prepare a series of novel crosslinking composite AEMs. As the result, the excessive swelling of membrane was improved and WU of membranes was decreased after crosslinking. The AEMs exhibited low methanol permeability, high selectivity, oxidative stability and alkaline resistance due to both crosslinking structure and the immobilized rGO nanosheets.163