Invited: Bipolar Membrane Fuel Cells Using Anion Conductive Multiblock Copolymers
Anion conductive multiblock copolymer membranes have shown promise for hydroxide conducting media. Anion conductive membranes have been synthesized with different block lengths and ion exchange capacities in order to maximize the ionic conductivity and understanding the relationship between chemical structures and water mobility in anion exchange membranes. The multiblock copolymers were synthesized by a polycondensation reaction between separately-prepared hydroxide-terminated oligomers and fluorine-terminated oligomers. The polymers were made ion conductive and hydroxide ion exchanged. The resulting anion conductive multiblock copolymers had higher conductivity than their random copolymer counterparts at the same IEC. The structure-property relationship of the ion conductive polymers, and bipolar membrane fuel cells constructed from them were characterized and will be reported.