新穎燃料電池用鈉飛揚/中孔洞二氧化矽 質子交換複合膜之製備與特性研究

Preparation and Characterizations of the Novel Nafion/Mesoporous Silica Composite Membrane For Proton Exchange Membrane Fuel Cell

彭秀賢(Hsiu-Hsien Peng)

指導教授 ： 陳玉惠

中原大學/理學院/化學研究所/碩士(2006年)

https://doi.org/10.6840/cycu200600522

摘要

本研究主要探討以顆粒小尺寸化後之自製中孔洞SiO2 (M-AG)為添加物，製備Nafion/silica複合膜(M-AG/NF)之保水力、離子導電度、耐熱性、機械性質及其應用於燃料電池的影響
結果顯示，M-AG均勻分佈於Nafion基材中，M-AG/NF為一半透明膜。M-AG添加量為5wt% 之M-AG/NF複合膜保水力可達39%，較recast Nafion膜(RNF)之保水力提升77%。含M-AG之M-AG/NF膜材其SO3H官能基裂解溫度從RNF之300℃可提升至330℃以上，有效增加膜材之耐熱性。M-AG-NF膜在50℃獲得較佳導電度（1.55×10-2S/cm）為RNF之二倍。
本研究之M-AG-3/NF複合膜在70℃，操作氣體為H2/O2之質子交換膜燃料電池(PEMFC)性能測試顯示，其性能分別比杜邦公司之N212及N115提升了7.2%及64.5%。當使用Air當陰極進料氣體時，M-AG-3/NF複合膜性能比N212提升7.8%，可成為有潛力之燃料電池電解質膜。

關鍵字

中孔洞二氧化矽 ； 燃料電池 ； 鈉飛揚

並列摘要

In this study, a home-made high surface area mesoprous SiO2 particles (M-AG) was used as the filler to prepare Nafion/mesoporous-silica composite membranes (M-AG-NF). The water uptake, ionic conductivity, thermal resistance and mechanical property of the as-prepared nanocomposite membrane and its application on fuel cell were studied. It was found that M-AG particles were uniformly dispersed in the Nafion matrix, resulting in a translucent film. The water uptake of the composite membrane approached to 39% which was better than that of the recast film (RNF) by 77%. The decomposition temperature of the SO3H functional group was risen from 300℃for RNF to 330℃ for M-AG/NF. At 50℃, the best conductivity of the M-AG/NF membrane (1.55x10-2S/cm) was one time higher than that of RNF membrane. With H2/O2 as the input gases, the proton exchange membrane fuel cell (PEMFC) with M-AG-3/NF membrane resulted in the maximum performance at 70℃(1060mW/cm2 for power density and 2573mA/cm2 for current density). Besides, with H2/air as the input gases, the maximum power density and the current density of the PEMEC with M-AG-3/NF composite membrane were 725mW/cm2 and 1651mA/cm2, respectively. In all, with O2 as the cathode input gas the performance of the PEMFC with M-AG-3/NF composite membrane exhibited higher power density than N115 and N212 for 64.5% and 7.2%, respectively, while, with air as cathode input gas, the power density of the PEMFC with M-AG-3/NF membrane was than that with N212 for 7.8%.

並列關鍵字

Fuel Cell ； Nafion ； Mesoporous Silica

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