Hydroxide-conducting polymer electrolyte membranes from aromatic ABA triblock copolymers

A new ABA triblock copolymer (QPPO-PAES-QPPO) was successfully synthesized by combining one block of poly(arylene ether sulfone)s (B, PAES) and two blocks of quaternary ammonium functionalized poly(2,6-dimethyl-1,4-phenylene oxide) (A, QPPO). Membranes of the triblock copolymer with distinct nanophase separation showed high performance.