Encapsulating Mobile Proton Carriers into Structural Defects in Coordination Polymer Crystals: High Anhydrous Proton Conduction and Fuel Cell Application

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• 作者：Munehiro Inukai ; Satoshi Horike ; Tomoya Itakura ; Ryota Shinozaki ; Naoki Ogiwara ; Daiki Umeyama ; Sanjog Nagarkar ; Yusuke Nishiyama ; Michal Malon ; Akari Hayashi ; Takashi Ohhara ; Ryoji Kiyanagi ; Susumu Kitagawa
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：138
• 期：27
• 页码：8505-8511
• 全文大小：472K
• 年卷期：0
• ISSN：1520-5126

文摘

We describe the encapsulation of mobile proton carriers into defect sites in nonporous coordination polymers (CPs). The proton carriers were encapsulated with high mobility and provided high proton conductivity at 150 °C under anhydrous conditions. The high proton conductivity and nonporous nature of the CP allowed its application as an electrolyte in a fuel cell. The defects and mobile proton carriers were investigated using solid-state NMR, XAFS, XRD, and ICP-AES/EA. On the basis of these analyses, we concluded that the defect sites provide space for mobile uncoordinated H₃PO₄, H₂PO₄^–, and H₂O. These mobile carriers play a key role in expanding the proton-hopping path and promoting the mobility of protons in the coordination framework, leading to high proton conductivity and fuel cell power generation.