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고분자전해질연료전지용 고수소이온전도성 및 전기화학적 효율성을 갖는 과불소계 술폰화 이오노머 분리막 및 전극바인더
Highly proton-conductive and electrochemically effective perfluorinated sulfonic acid ionomer membranes and electrode binders for polymer electrolyte membrane fuel cells
Perfluorinated sulfonic acid (PFSA) ionomers have been widely used for renewable energy generation, including polymer electrolyte fuel cells (PEFCs), owing to their excellent resistance to harsh chemicals and good ion-transport properties. PFSA materials experience critical chemical decomposition to radical attacks, and fast hydrogen crossover leading to fairly reduced electrochemical performances, when they are used as membrane materials. Similar chemical degradation also occurs in PEFC electrodes containing PFSA ionomer binders used as both mechanical supporters and proton conductors and shortens PEFC lifetime. In this study, several approaches based on their morphological rearrangement to overcome these economical and technical issues are proposed. They include pore-filling membrane formation, nanodispersion, and their combination.
