High temperature proton exchange membrane fuel cell using a sulfonated membrane obtained via H2SO4 treatment of PEEK-WC
High temperature proton exchange membrane fuel cell using a sulfonated membrane obtained via H2SO4 treatment of PEEK-WC
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DOI：
10.1016/j.cattod.2005.03.050
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发表时间：
2005-06-30
期刊：
影响因子：
5.3
通讯作者：
Passalacqua, E
中科院分区：
文献类型：
--
作者：
Paturzo, L;Basile, A;Passalacqua, E
介绍了一种玻璃状聚醚醚酮PEEK-WC与硫酸磺化的方法。根据反应时间的不同，可以得到离子交换容量（IEC）在0.30 ~ 0.76 meq(H+)/g之间的聚合物，用NaOH溶液滴定测定。用差示扫描量热法研究了聚合物的热性能，结果表明，随着磺化程度的增加，玻璃化转变温度从纯PEEK-WC的224℃增加到IEC为0.76 meq(H+)/g的聚合物的246℃。磺化聚合物用于制备质子交换膜，有望应用于燃料电池。以DNM为溶剂，采用溶剂蒸发法制备了致密膜。膜的运输特性是根据吸水率和对氢和氧的渗透性来确定的。通过测量不同工作温度下电池电压和功率密度随电流密度的变化曲线，进行了电化学表征，并将结果与商用Nafion膜的结果进行了比较。在H-2/空气燃料电池中，S-PEEK-WC膜在120℃下的功率密度为284 mW/cm(2)，略高于nion的相应值。(c) 2005 Elsevier B.V.版权所有
A method for the sulfonation of PEEK-WC, a glassy poly(ether ether ketone) with sulphuric acid is presented. Depending on the reaction time, polymers with ion exchange capacity (IEC) from 0.30 to 0.76 meq(H+)/g are obtained, as determined by titration with NaOH solutions. The thermal properties of the polymers were studied by differential scanning calorimetry, showing that the glass transition temperature increases with increasing degree of sulfonation, from 224 degrees C for pure PEEK-WC to 246 degrees C for the polymer having an IEC of 0.76 meq(H+)/g. The sulfonated polymers were used to prepare proton exchange membranes for possible application in fuel cells. Dense membranes were prepared by solvent evaporation, using DNM as the solvent. The transport properties of the membranes were determined in terms of water uptake and permeability for hydrogen and oxygen. Electrochemical characterization was performed by measuring cell voltage and power density curves as a function of current density at different working temperatures and the results were compared with those of a, commercial Nafion membrane. A power density of 284 mW/cm(2) was obtained for S-PEEK-WC membrane at 120 degrees C in H-2/air fuel cell, slightly above the corresponding value found for Nafion. (c) 2005 Elsevier B.V. All rights reserved.