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首页> 外文期刊>Journal of power sources >Synthesis and characterization of sulfonated poly(ether sulfone) copolymer membranes for fuel cell applications
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Synthesis and characterization of sulfonated poly(ether sulfone) copolymer membranes for fuel cell applications

机译：燃料电池用磺化聚醚砜共聚物膜的合成与表征

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摘要

Sulfonated poly(ether sulfone) copolymers (PESs) are synthesized using hydroquinone 2-potassium sulfonate (HPS) with other monomers (bisphenol A and 4-fluorophenyl sulfone). A series of PESs with different mol percent of hydrophilic group is prepared by changing the mole ratio of HPS in the polymerization reaction. The chemical structure and thermal stability of the polymers are characterized by using ~1H NMR, FT-IR and TGA techniques. The PES 60 membrane, which has 60 mol percent of HPS unit in the polymer backbone, has a proton conductivity of 0.091 S cm~(-1) and good insolubility in boiling water. The TGA showed that PES 60 is stable up to 272 deg C with a char yield of about 29 percent at 900 deg C under a nitrogen atmosphere. To investigate single-cell performance, a catalyst-coated PES 60 membrane is used together with hydrogen and oxygen as the fuel and the oxidant, respectively. Cell performance is enhanced by increasing the temperature. A current density of 1400 mA cm~(-2) at 0.60 V is obtained at 70 deg C.
机译：磺化聚（醚砜）共聚物（PES）是使用对苯二酚2-磺酸钾（HPS）与其他单体（双酚A和4-氟苯基砜）合成的。通过改变聚合反应中HPS的摩尔比，可以制得一系列具有不同摩尔百分比的亲水基的PES。聚合物的化学结构和热稳定性通过1 H NMR，FT-IR和TGA技术表征。 PES 60膜在聚合物主链中具有60 mol％的HPS单元，质子传导率为0.091 S cm〜（-1），在沸水中的溶解性良好。 TGA显示，PES 60在氮气氛下，在900℃时最高可稳定至272℃，焦炭产率约为29％。为了研究单电池性能，将涂有催化剂的PES 60膜与氢气和氧气分别用作燃料和氧化剂。通过提高温度来增强电池性能。在70摄氏度下获得0.60 V下的1400 mA cm〜（-2）的电流密度。

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