膜
肿胀 的
电导率
高分子化学
质子交换膜燃料电池
电解质
聚合物
化学工程
侧链
化学
燃料电池
材料科学
相对湿度
复合材料
物理化学
电极
热力学
生物化学
工程类
物理
作者
Yoshiki Sutou,Yan Yin,Zhaoxia Hu,Shouwen Chen,Hidetoshi Kita,Ken‐ichi Okamoto,Hongyuan Wang,Hironobu Kawasato
摘要
Abstract A series of aromatic sulfonated polyimides (SPIs) bearing sulfophenoxy side groups have been successfully synthesized and evaluated as polymer electrolyte membranes for fuel cell applications. The SPIs had high viscosity and gave tough and flexible membranes. The SPI membranes showed anisotropic membrane swelling in water with much larger dimensional change in thickness direction than in plane one. They showed the better proton‐conducting performance even in the lower relative humidity (RH) range than the other SPI membranes, for example, a high proton conductivity of 0.05 S/cm at 50 % RH and 120 °C. They maintained high mechanical strength and conductivity after aging in water at 130 °C for 500 h, showing much better water stability compared with the main‐chain‐type SPI and side‐chain‐type SPI membranes reported so far. In polymer electrolyte fuel cells (PEFCs) operated at 90 °C and 84–30%RH, they showed fairly high cell performances and have high potential for PEFC applications. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 1463–1477, 2009
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