Proton-conducting polymer with acid groups in side chains, preparation method thereof, polymer membrane manufactured using the polymer, and fuel cell using the polymer membrane
申请人:Samsung SDI Co., Ltd.
公开号:US20040097695A1
公开(公告)日:2004-05-20
A proton-conducting polymer, a preparation method thereof, a polymer membrane manufactured from the proton-conducting polymer, and a fuel cell having the polymer membrane are provided. The proton-conducting polymer contains an acid-bearable aromatic group covalently bonded to its polyimide backbone and a proton-conducting acid group attached to the aromatic group. A polymer membrane manufactured from the proton-conducting polymer has greater mechanical strength and ionic (protonic) conductivity than existing sulfonated polyimide membranes and thus improves the performance of fuel cells. In addition, the proton-conducting polymer membrane is low cost, enabling automobile fuel cells to be commercialized. Since the proton-conducting polymer membrane is less permeable to methanol, it can be used effectively for DMFCs without causing cell performance degradation.
本文提供了一种质子传导聚合物、其制备方法、用该质子传导聚合物制造的聚合物膜以及具有该聚合物膜的燃料电池。质子传导聚合物含有一个与聚酰亚胺骨架共价键合的可承受酸的芳香基团和一个连接到芳香基团上的质子传导酸基团。与现有的磺化聚酰亚胺膜相比,用质子传导聚合物制造的聚合物膜具有更高的机械强度和离子(质子)传导性,从而提高了燃料电池的性能。此外,质子传导聚合物膜成本低廉,可使汽车燃料电池商业化。由于质子传导聚合物膜对甲醇的渗透性较低,因此可有效地用于 DMFC,而不会导致电池性能下降。