甲醇燃料電池磺酸化聚乙烯醇薄膜電極組的製作及測試

Fabrication and Characterization of Sulfonated-Poly (Vinyl Alcohol) Membrane Electrode Assemblies for Direct Methanol Fuel Cells

戴宏哲(Horng-Jer Tai) ； 蔡政憲(Cheng-Hsien Tsai)

《高雄應用科技大學工程科技學刊》 1卷2期 (2015/12) Pp. 39-49

https://doi.org/10.6553/JKTUET.2015.0102.04

摘要

本研究中分別使用磺酸基丁二酸及磺酸基間苯二甲酸改質聚乙烯醇使具質子傳導性，製成甲醇燃料電池用質子交換膜及電極液膠，並用以組成薄膜電極組。磺酸基丁二酸改質聚乙烯醇薄膜比起磺酸基間苯二甲酸改質聚乙烯醇薄膜具有較高的的導電度、交聯度，較低的含水率及甲醇滲透率，且兩者皆比商用質子換膜Nafion具有較低的甲醇滲透率，可以改善甲醇燃料電池中甲醇穿透問題。文中也針對製成的薄膜電極組，探討膜材、電極製作方式、液膠及觸媒量等對組裝的單電池放電池效能的影響。

關鍵字

直接甲醇燃料電池 ； 薄膜電極組 ； 磺酸化聚乙烯醇

並列摘要

Sulfosuccinic acid (SSA) and sulfoisophthalic acid (SIPA) were employed in this work to modify poly(vinyl alcohol) (PVA) to impart proton conductivity to the synthesized polymers. The sulfonated PVAs were used to fabricate proton exchange membranes and liquid electrode pastes based on which membrane electrode assemblies (MEA) were assembled. The PVA/SSA membranes had higher conductivity, higher crosslink density, lower water uptake and lower methanol permeability than the PVA/SIPA membranes. The methanol crossover problem encountered in Nafion-based membrane could be alleviated by using the modified PVA membranes since both of them had lower methanol permeability than Nafion. The effects of membrane materials, liquid electrode pastes, different fabrication techniques and catalyst dosages on the performance of the MEAs were also discussed.

並列關鍵字

direct methanol fuel cell ； membrane electrode assembly ； sulfonated poly (vinyl alcohol)