(Invited) Electrochemical Energy Storage and Conversion Devices Incorporating C2-Protected Polybenzimidazoliums and Polyimidazoliums

摘要

Alkaline anion exchange membranes which are capable of conducting hydroxide ions have broadly been applied in alkaline-based electrochemical energy storage and conversion technologies. Electrochemical systems relying on alkaline-based active components possess unique advantages over their acidic counterparts but at the same time are associated with significant challenges. There is a growing interest in C2-protected polybenzimidazoliums and polyimidazoliums as hydroxide ion conducting polymers for membranes and catalyst layers because of their high stability under caustic conditions, scalability in synthesis, and mechanical strength. This presentation will focus on recent progress in their preparation and on research trends incorporating these polymers into membranes, catalyst layers, and electrochemical energy storage and conversion devices. The challenges of integration that need to be overcome to meet critical requirements will be discussed, together with a summary and perspective for future directions.