Sulfonation of PIM-1 - Towards Highly Oxygen Permeable Binders for Fuel Cell Application
- Sulfonation of PIM-1 - Towards Highly Oxygen Permeable Binders for Fuel Cell Application
- 김병각; 헨켄스마이어디억; 김형준; 장종현; 남석우; 임태훈
- sulfonation; electrode binder; PIM; polymer of intrinsic microporosity; polymer electrolyte fuel cell (PEFC)
- Issue Date
- Macromolecular research
- VOL 22, NO 1, 92-98
- The development of alternative, non-fluorinated membranes for polymer electrolyte membrane fuel cells
necessitates the co-development of a non-fluorinated electrode catalyst binder to ensure compatibility between
membrane and electrode. However, most hydrocarbon based polymers have lower gas permeability than perfluorinated
Nafion. In this work we tried to obtain a sulfonated, non-fluorinated binder based on PIM-1 (polymer of intrinsic
microporosity 1) which has up to 2000 times higher permeability than Nafion. However, sulfonation was not
straightforward and often led to degradative side reactions. Sulfonated polymers were too brittle to give stable membranes
and the highest experimental IEC was 1.03 meq/g, significantly lower than the theoretical IEC of 3.2 meq/g (2 sulfonic acid groups per repeat unit).
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