Encapsulating mobile proton carriers into structural defects in coordination polymer crystals; High anhydrous proton conduction and fuel cell application

配位高分子結晶内の欠陥部位に閉じ込められたプロトン担体; 無水プロトン伝導と燃料電池への応用

犬飼 宗弘*; 堀毛 悟史*; 板倉 智也*; 篠崎 良太*; 荻原 直希*; 梅山 大樹*; Nagarker, S.*; 西山 裕介*; Malon, M.*; 林 灯*; 大原 高志  ; 鬼柳 亮嗣; 北川 進*

Inukai, Munehiro*; Horike, Satoshi*; Itakura, Tomoya*; Shinozaki, Ryota*; Ogiwara, Naoki*; Umeyama, Daiki*; Nagarker, S.*; Nishiyama, Yusuke*; Malon, M.*; Hayashi, Akari*; Ohara, Takashi; Kiyanagi, Ryoji; Kitagawa, Susumu*

We describe encapsulation of mobile proton carriers into defect sites in non-porous coordination polymers. The proton carriers are encapasulated with high mobility and provide high proton conductivity at 150C under anhydrous condition. The high proton conductivity and non-porous nature allow power generation by fuel cell in which CPs are used as electrolyte. To observe defects and mobile proton carriers, we carried out solid-state NMR, XAFS, XRD, and ICP-AES/EA. On the basis of these analyses, we elucidated that the defect sites provide space for mobile uncoordinated HPO, HPO, and HO. These mobile carriers play a key role to expand proton hopping path and promote the mobility of all protons in coordination frameworks, leading to high proton conductivity and fuel cell power generation.