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Preparation and DMFC performance of a sulfophenylated poly(arylene ether ketone) polymer electrolyte membrane |
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| Authors: | Baijun Liu Wei Hu Haifeng Zou Zhenhua Jiang |
| Affiliation: | a College of Chemistry, Jilin University, Changchun 130012, PR China b Los Alamos National Laboratory, Electronic and Electrochemical Materials and Devices, Los Alamos, NM 87545, USA c Institute for Chemical Process and Environmental Technology, National Research Council, Ottawa, Ontario K1A 0R6, Canada d Department of Energy Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea |
| Abstract: | A sulfonated poly(aryl ether ether ketone ketone) (PEEKK) having a well-defined rigid homopolymer-like chemical structure was synthesized from a readily prepared PEEKK by post-sulfonation with concentrated sulfuric acid at room temperature within several hours. The polymer electrolyte membrane (PEM) cast from the resulting polymer exhibited an excellent combination of thermal resistance, oxidative and dimensional stability, low methanol fuel permeability and high proton conductivity. Furthermore, membrane electrode assemblies (MEAs) were successfully fabricated and good direct methanol fuel cell (DMFC) performance was observed. At 2 M MeOH feed, the current density at 0.5 V reached 165 mA/cm, which outperformed our reported similarly structured analogues and MEAs derived from comparative Nafion® membranes. |
| Keywords: | Poly(aryl ether ketone)s Polymer electrolyte membrane Fuel cells Membrane electrode assemblies Direct methanol fuel cells |
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