Proton-conducting blend membranes of Nafion/poly(vinylphosphonic acid) for proton exchange membrane fuel cells
Proton-conducting blend membranes of Nafion/poly(vinylphosphonic acid) for proton exchange membrane fuel cells
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DOI：
10.1007/s10965-013-0217-2
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发表时间：
2013-08
影响因子：
2.8
通讯作者：
Unal Sen;Oktay Acar;S. U. Çelik;A. Bozkurt;A. Ata;T. Tokumasu;A. Miyamoto
中科院分区：
文献类型：
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作者：
Unal Sen;Oktay Acar;S. U. Çelik;A. Bozkurt;A. Ata;T. Tokumasu;A. Miyamoto
合成了Nafion/聚乙烯基膦酸共混物，并对其进行了表征。以乙烯基膦酸为原料，采用自由基聚合法制备了聚乙烯基膦酸（PVPA）。然后，以不同的PVPA重复单元与-SO3H的摩尔比为原料，采用浇铸法制备了Nafion/PVPA共混膜。制备了均匀的Nafion/PVPA薄膜。利用傅里叶变换红外光谱（FT-IR）研究了Nafion-PVPA相互作用。通过热重分析（TGA）和差示扫描量热法（DSC）研究了其热性能。TGA结果表明，所有这些Nafion/PVPA电解质在高达400°C时都是热稳定的。利用扫描电子显微镜（SEM）对膜的形貌进行了进一步表征。在130℃无水条件下，Nafion/P(VPA)3共混膜的质子电导率为1.1 × 10−5S/cm。水化后，共混物的电导率增加了至少3个数量级，在室温下，当相对湿度为50%时，电导率超过10−2S/cm。图本文讨论了钠离子/聚乙烯基膦酸共混物的合成和表征。利用傅里叶变换红外光谱（FT-IR）研究了Nafion-PVPA相互作用。通过热重分析（TGA）和差示扫描量热法（DSC）研究了其热性能。TGA结果表明，所有这些Nafion/PVPA电解质的热稳定性至少高达400°C。水化后，共混物的电导率增加了至少3个数量级，在室温下，当相对湿度为50%时，电导率超过10−2S/cm。
Nafion/poly(vinylphosphonic acid) blends were synthesized and characterized in this work. Poly(vinylphosphonic acid), PVPA, was synthesized by the free-radical polymerization of vinylphosphonic acid. Then Nafion/PVPA blend membranes were prepared by means of film casting from Nafion/PVPA solutions with several molar ratios of PVPA repeat unit to –SO3H. Homogeneous Nafion/PVPA films were produced. Nafion–PVPA interactions were studied by Fourier transform infrared (FT-IR) spectroscopy. Thermal properties were investigated via thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The TGA results illustrated that all of these Nafion/PVPA electrolytes are thermally stable up to 400 °C. The membrane properties were further characterized by studying their morphologies using scanning electron microscopy (SEM). The proton conductivity of the Nafion/P(VPA)3blend membrane was 1.1 × 10−5S/cm in an anhydrous state at 130 °C. The conductivities of the blends increased by at least three orders of magnitude upon hydration, exceeding 10−2S/cm with RH = 50 % at ambient temperature.FigureThe synthesis and characterization of Nafion/poly(vinylphosphonic acid) blends are discussed in this work. Nafion–PVPA interactions were studied by Fourier transform infrared (FT-IR) spectroscopy. Thermal properties were investigated via thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). TGA results illustrated that all of these Nafion/PVPA electrolytes are thermally stable up to at least up to 400 °C. The conductivities of the blends increased by at least three orders of magnitude upon hydration, exceeding 10−2S/cm with RH = 50 % at ambient temperature.