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Li X.,Institute of Technical ChemistryClausthal University of TechnologyArnold Sommerfeld Strasse 438678Clausthal ZellerfeldGermany | Drache M.,Institute of Technical ChemistryClausthal University of TechnologyArnold Sommerfeld Strasse 438678Clausthal ZellerfeldGermany | Ke X.,Institute of Technical ChemistryClausthal University of TechnologyArnold Sommerfeld Strasse 438678Clausthal ZellerfeldGermany | Gohs U.,Leibniz Institute of Polymer Research | Beuermann S.,Institute of Technical ChemistryClausthal University of TechnologyArnold Sommerfeld Strasse 438678Clausthal ZellerfeldGermany
Macromolecular Materials and Engineering | Year: 2015

Proton exchange membranes for high temperature fuel cell applications were obtained via graft copolymerizations on commercial poly(ethylene-alt-tetrafluoroethylene) (ETFE) films. ETFE was activated by electron beam treatment, and the hydrophilic monomers acrylic acid and hydroxyethyl methacrylate were grafted to ETFE. The maximum grafting level was 620%. The grafted membranes were doped with the proton carrier phosphoric acid leading to a maximum doping level of 450%. Stress-strain measurements indicate good mechanical stability of the composite membranes. The polymer-acid membranes were tested in a H2/O2 fuel cell. At a current density of 200mA·cm-2 a stable power density of 113mW·cm-2 was determined at 120°C. The results show that high phosphoric acid contents associated with high proton conductivity may be obtained with a copolymer containing acrylic acid. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Loading Institute of Technical ChemistryClausthal University of TechnologyArnold Sommerfeld Strasse 438678Clausthal ZellerfeldGermany collaborators
Loading Institute of Technical ChemistryClausthal University of TechnologyArnold Sommerfeld Strasse 438678Clausthal ZellerfeldGermany collaborators