POLYMER ELECTROLYTE MATERIAL, POLYMER ELECTROLYTE MOLDED PRODUCT USING THE POLYMER ELECTROLYTE MATERIAL, AND METHOD FOR MANUFACTURING THE POLYMER ELECTROLYE MOLDED PRODUCT, MEMBRANE ELECTRODE COMPOSITE, AND SOLID POLYMER FUEL CELL
申请人:Izuhara Daisuke
公开号:US20100196782A1
公开(公告)日:2010-08-05
It is an object of the present invention to provide a polymer electrolyte material which has excellent proton conductivity even under the conditions of a low humidity or a low temperature and is excellent in mechanical strength and fuel barrier properties, and which moreover can achieve high output, high energy density and long-term durability in forming a polymer electrolyte fuel cell therefrom, and a polymer electrolyte form article using the same and a method for producing the same, a membrane electrode assembly and a polymer electrolyte fuel cell, each using the same.
The present invention employs the following means. Namely, the polymer electrolyte material of the present invention is a polymer electrolyte material including a constituent unit (A1) containing an ionic group and a constituent unit (A2) substantially not containing an ionic group, wherein a phase separation structure is observed by a transmission electron microscope and a crystallization heat measured by differential scanning calorimetry is 0.1 J/g or more, or a phase separation structure is observed by a transmission electron microscope and the degree of crystallinity measured by wide angle X-ray diffraction is 0.5% or more. Also, the polymer electrolyte form article, the membrane electrode assembly and the polymer electrolyte fuel cell of the present invention are characterized by being composed of such polymer electrolyte materials.
本发明的目的是提供一种聚合物电解质材料,即使在低湿度或低温条件下也具有优异的质子导电性,并且具有出色的机械强度和燃料屏障性能,而且可以在形成聚合物电解质燃料电池时实现高输出、高能量密度和长期耐久性,以及使用该材料的聚合物电解质形态物品和制备该物品的方法、膜电极组件和聚合物电解质燃料电池。本发明采用以下手段。即,本发明的聚合物电解质材料是一种聚合物电解质材料,包括含有离子基团的组分单元(A1)和基本不含离子基团的组分单元(A2),其中透射电子显微镜观察到相分离结构,差示扫描量热法测量的结晶热为0.1 J/g或更高,或透射电子显微镜观察到相分离结构,宽角X射线衍射测量的结晶度为0.5%或更高。此外,本发明的聚合物电解质形态物品、膜电极组件和聚合物电解质燃料电池的特点是由这种聚合物电解质材料组成。