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首页> 外文期刊>Journal of Applied Polymer Science >The influence of poly(3,4-ethylenedioxythiophene) modification on the transport properties and fuel cell performance of Nafion-117 membranes
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The influence of poly(3,4-ethylenedioxythiophene) modification on the transport properties and fuel cell performance of Nafion-117 membranes

机译：聚（3,4-亚乙二醇噻吩）改性对Nafion-117膜的运输性能和燃料电池性能的影响

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摘要

Nafion-117/PEDOT composite membranes were synthesized by in situ chemical polymerization of 3,4-ethylenedioxythiophene (EDOT) using ammonium persulfate as an oxidant. The polymerization of EDOT in Nafion membranes for various EDOT/oxidant treatment sequences was studied for the first time. PEDOT introduction leads to a slight decrease in both the ion-exchange capacity and water uptake of the composite membranes, as well as to an increase in cationic transport. Membranes initially treated with an oxidant exhibit better conductivity and lower hydrogen permeability. The effect of both modification of Nafion-117 membranes by PEDOT and hot-pressing of hydrogen-oxygen membrane-electrode assemblies (MEAs) on the performance of proton-exchange membrane fuel cells was studied. The maximum power density of the fabricated MEAs increases 1.5-fold: from 510 (for a pristine Nafion-117 membrane) to 810 mW cm(-2) (for a membrane modified by PEDOT). The current density at a voltage of 0.4 V reaches 1248 and 2246 mA cm(-2), respectively.
机译：以过硫酸铵为氧化剂，通过3,4-亚乙基二氧噻吩（EDOT）的原位化学聚合制备了Nafion-117/PEDOT复合膜。首次研究了不同EDOT/氧化剂处理顺序下，EDOT在Nafion膜中的聚合。PEDOT的引入导致复合膜的离子交换容量和吸水率略有降低，并且阳离子传输增加。最初用氧化剂处理的膜具有更好的导电性和更低的氢渗透性。研究了PEDOT改性Nafion-117膜和热压氢氧膜电极组件（MEAs）对质子交换膜燃料电池性能的影响。所制备的MEA的最大功率密度增加了1.5倍：从510（对于原始Nafion-117膜）增加到810 mW cm（-2）（对于经PEDOT改性的膜）。在0.4V电压下，电流密度分别达到1248和2246毫安厘米（-2）。

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