申请人:JSR Corporation
公开号:EP1947717A1
公开(公告)日:2008-07-23
An object of the invention is to provide an electrode catalyst layer of a solid polymer electrolyte membrane-electrode assembly expressing excellent balance between water retention and drainage in an electrode, good power generation performance under any of low humidity and high humidity conditions, and also excellent durability of power generation.
The electrode catalyst layer of the invention contains catalyst particles, an ion exchange resin and a water repellent agent, wherein said water repellent agent contains at least one kind selected from the group consisting of (A) a fluorine-containing copolymer having a structure unit derived from a polyfluoroalkyl-containing (meth)acrylate and (B) a fluorine-containing copolymer having a specific structure unit derived from a fluorine-containing olefin monomer and a specific structure unit derived from a vinyl ether monomer.
本发明的目的是提供一种固体聚合物电解质膜-电极组件的电极催化剂层,该催化剂层在电极的保水和排水之间表现出极佳的平衡,在低湿度和高湿度条件下均具有良好的发电性能,同时还具有极佳的发电耐久性。
本发明的电极催化剂层包含催化剂颗粒、离子交换树脂和憎水剂,其中所述憎水剂包含至少一种选自以下组别的憎水剂:(A) 含氟共聚物,其结构单元来自含多氟烷基的(甲基)丙烯酸酯;(B) 含氟共聚物,其特定结构单元来自含氟烯烃单体和特定结构单元来自乙烯基醚单体。