Preparation and DMFC performance of a sulfophenylated poly(arylene ether ketone) polymer electrolyte membrane

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)...

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Bibliographic Details
Published in:Electrochimica acta 2010-04, Vol.55 (11), p.3817-3823
Main Authors: Liu, Baijun, Hu, Wei, Kim, Yu Seung, Zou, Haifeng, Robertson, Gilles P., Jiang, Zhenhua, Guiver, Michael D.
Format: Article
Language:English
Subjects:
Applied sciences
Direct methanol fuel cells
Electrodes
Electrolytes
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Ethers
Exact sciences and technology
Exchange resins and membranes
Forms of application and semi-finished materials
Fuel cells
Ketones
Membrane electrode assemblies
Membranes
Methyl alcohol
Poly(aryl ether ketone)s
Polymer electrolyte membrane
Polymer industry, paints, wood
Technology of polymers
Thermal resistance
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Summary: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.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2010.02.014