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Study of the variation of catalyst loading in cathode for SPEEK/CSMM membrane in direct methanol fuel cell (DMFC)

机译:直接甲醇燃料电池(DMFC)SPEEK / CSMM膜阴极负载量的变化研究

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摘要

Variation of anode catalyst loading for modified sulfonated poly (ether ether ketone) (SPEEK) with charged surface modifying macromolecules (cSMM) membrane was studied, in order to get the higher performance in DMFC. The best optimal anode catalyst loading was 4 mgcm-2 for 30% Pt/Ru based on our previous result for this application. The modified SPEEK/CSMM membrane was characterized to ensure of its better performance in term of water uptake and methanol permeability. In cathode side, the effect of 5% and 10% Pd/C in 2,4 and 6 mgcm-2 of catalyst loading has been investigated with a fuel cell assembly. The preparation method of catalyst ink and membrane electrode assembly (MEA) was based on Dr. Blade method and hot pressing by using catalyzed diffusion media (CDM) method. The air flowrates were varied from 25-1000ml min-1, while 1M methanol concentrations, 1 ml min-1 of methanol flowrate and 60°C operating temperature were kept constant. These parameters were tested on the performance of single cell DMFC with 4 cm2 electrodes.The optimization catalyst loading will enhance the DMFC performance. It was found, the best optimal cathode catalyst loading was 4 mgcm-2 for 10% Pd/C with 4 mgcm-2 for 30% Pt/Ru in anode side for this application.
机译:研究了带电荷表面改性大分子(cSMM)膜的改性磺化聚醚醚酮(SPEEK)阳极催化剂负载量的变化,以期在DMFC中获得更高的性能。根据我们先前对该应用的结果,最佳的最佳阳极催化剂负载量为30%Pt / Ru为4 mgcm-2。改性SPEEK / CSMM膜的特点是在吸水率和甲醇渗透性方面确保其更好的性能。在阴极侧,用燃料电池组件研究了在2,4和6 mgcm-2的催化剂中5%和10%Pd / C的影响。催化剂墨水和膜电极组件(MEA)的制备方法基于Dr. Blade方法和催化扩散介质(CDM)方法的热压。空气流量在25-1000ml min-1之间变化,而1M甲醇浓度,1 ml min-1甲醇流量和60°C操作温度保持恒定。这些参数在具有4 cm2电极的单电池DMFC的性能上进行了测试。优化的催化剂负载量将增强DMFC的性能。已经发现,对于该应用,最佳的最佳阴极催化剂负载量是在阳极侧对于10%Pd / C为4mgcm-2,对于30%Pt / Ru为4mgcm-2。

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