期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 23, 页码 12918-12923出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202101400
关键词
anhydrous proton conduction; electrostatic interactions; hydrogen-bonding interactions; polybenzimidazoles
资金
- National Natural Science Foundation of China [21805173, 21975049]
- MOE tier 1 grant [R-143-000-A71-114]
- NUS startup grant [R-143-000-A28-133]
The research presents a strategy for designing porous polybenzimidazole frameworks to address issues related to phosphoric acid proton carrier leakage and slow proton transport. The materials exhibit ultrafast and stable proton conduction, suitable for low proton carrier content and activation energy.
Polybenzimidazoles are engineering plastics with superb thermal stability and this specificity has sparked a wide-ranging research to explore proton-conducting materials. Nevertheless, such materials encounter challenging issues owing to phosphoric acid proton carrier leakage and slow proton transport. We report a strategy for designing porous polybenzimidazole frameworks to address these key fundamental issues. The built-in channels are designed to be one-dimensionally extended, unidirectionally aligned, and fully occupied by neat phosphoric acid, while the benzimidazole walls trigger multipoint, multichain, and multitype interactions to spatially confine a phosphoric acid network in pores and facilitate proton conduction via deprotonation. The materials exhibit ultrafast and stable proton conduction for low proton carrier content and activation energy-a set of features highly desired for proton transport. Our results offer a design strategy for the fabrication of porous polybenzimidazoles for use in energy conversion applications.
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