Fuel Cell Performance of Radiation-grafted Polymer Electrolyte Membranes
Polymer electrolyte membrane fuel cells (PEMFCs) are very promising as power sources for automotive applications, where stability and durability at a high temperature and low humidity are demanded. The currently used expensive Nation membranes are not appropriated for application in high temperature fuel cells. For this reason, an inexpensive polyetheretherketone (PEEK)-based polymer electrolyte membrane (ssPEEK) wasprepared by successive two-step grafting of divinylbenzene (DVB) and ethyl styrenesulfonate (ETSS) onto PEEK film, followed by hydrolysis of the ETSS graft chains to form styrenesulfonate (SS) graft chains. The results of the fuel cell test showed that ssPEEK has a performance comparable to Nation at 80℃ and 100 RH-％,and much better performance at 95 ℃ and 40 RH-％. In addition, at the latter high temperature and low humidity,the ssPEEK-based cell could be operated with stable performance for more than 250 h without any substantial voltage drop, whereas the voltage of the Nation-based cell continuously dropped over the sameduration. Furthermore, the ssPEEK-based cell could be durable for more than 1000 h under the same temperatureand a relative high humidity of 80 RH-％. Therefore, the ssPEEK electrolyte membranes are promising and deserve further study.
Jinhua Chen Maolin Zhai Masaharu Asano Yasunari Maekawa Masaru Yoshida
Conducting Polymer Materials Group,Environment and Industrial Materials Research Division,Quantum Beam Science Directorate,Japan Atomic Energy Agency (JAEA),1233 Watanuki-machi,Takasaki,Gunma 370-1292,Japan
国际会议
5th International Symposium on High-Tech Polymer Materials(HTPM-V)(第五届国际高技术高分子材料学术会议)
北京
英文
195
2008-10-27（万方平台首次上网日期，不代表论文的发表时间）