Synthesis and properties of novel sulfonated polyimides bearing sulfophenyl pendant groups for fuel cell application
Synthesis and properties of novel sulfonated polyimides bearing sulfophenyl pendant groups for fuel cell application
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DOI：
10.1016/j.polymer.2008.11.020
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发表时间：
2009-01
期刊：
影响因子：
4.6
通讯作者：
Kangcheng Chen;Xinbing Chen;Kazuaki Yaguchi;N. Endo;Mitsuru Higa;K. Okamoto
中科院分区：
文献类型：
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作者：
Kangcheng Chen;Xinbing Chen;Kazuaki Yaguchi;N. Endo;Mitsuru Higa;K. Okamoto
合成了一种新型磺化苯基二胺，即4，4‘-双(4-氨基苯氧基)-3，3’-双(4-磺基苯基)联苯及其系列磺化聚酰亚胺(SPI)。SPIS具有较高的粘度，可制得坚韧、柔韧、透明的膜。SPI膜在水中表现出各向异性的溶胀，膜厚度方向的溶胀度是平面方向的2.5~4倍。它们表现出相当高的质子传导性。例如，在60℃时，离子交换容量为1.80mequiv/g的SPI在水中的电导率分别为104和7.3mS/cm，在50%RH中的电导率为50%。即使在130℃的水中老化500h，SPI仍保持着高的机械强度和质子传导性，显示出可与迄今报道的最好的SPI相媲美的高水稳定性。在90°C和50%RH下运行的聚合物电解质燃料电池(PEFCs)中，它们表现出相当高的电池性能，具有很大的应用潜力。
A novel sulfonated diamine bearing sulfophenyl pendant groups, namely, 4,4′-bis (4-aminophenoxy)-3,3′-bis(4-sulfophenyl) biphenyl and a series of sulfonated polyimides (SPIs) based on it were successfully synthesized. The SPIs had high viscosity and gave tough, flexible and transparent membranes. The SPI membranes showed anisotropic membrane swelling in water with 2.5–4 times larger swelling in thickness direction than in plane one. They displayed reasonably high proton conductivity. For example, the conductivities for the SPI with an ion exchange capacity of 1.80mequiv/g were 104 and 7.3mS/cm in water and 50% RH, respectively, at 60°C. They maintained high mechanical strength and proton conductivity even after aging in water at 130°C for 500h, showing the high water stability comparable to the best SPI reported so far. In polymer electrolyte fuel cells (PEFCs) operated at 90°C and 50% RH, they showed fairly high cell performances and have high potential for PEFC applications.