High durable PEK-based anion exchange membrane for elevated temperature alkaline fuel cells

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• 作者：Hadis Zarrin ; Jason Wu ; Michael Fowler ; Zhongwei Chen ; ^{zhwchen@uwaterloo.ca}
• 关键词：Anion exchange membrane ; Alkaline fuel cell ; High durability ; High temperature ; Ion conductivity
• 刊名：Journal of Membrane Science
• 出版年：2012
• 出版时间：15 March, 2012
• 年：2012
• 卷：394-395
• 期：Complete
• 页码：193-201
• 全文大小：1501 K

文摘

Highly durable quaternary ammonium polyetherketone hydroxide (QAPEK-OH) membranes were developed for alkaline fuel cells operating at elevated temperatures via chloromethylation, quaternization and alkalinization method. The chemical reaction for chloromethylated polymer (CMPEK) was confirmed by nuclear magnetic resonance (¹H NMR) and the QAPEK-OH membranes were characterized by Fourier transform infrared spectroscopy (FT-IR). The thermal properties of the membranes were determined by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The ion-exchange capacity (IEC), water uptake, mechanical properties and anion conductivity of the QAPEK-OH membranes were measured to evaluate their applicability in alkaline fuel cells at elevated temperature. The anionic conductivity of the QAPEK-OH membrane varied from 8 ¡Á 10^? to 1.1 ¡Á 10^? S cm^? over the temperature range 20-100 ¡ãC. The QAPEK-OH membrane showed excellent alkaline stability in 1 M KOH solution at 100 ¡ãC. The excellent temperature durability of QAPEK-OHs makes them promising membrane materials for alkaline fuel cells.