Proton Conducting membranes obtained by doping radiation-grafted basic membrane matrices with phosphoric acid

2014-01-06 14:57

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研究领域：燃料电池质子导电膜交流阻抗频率范围：1MHz - 1mHz By grafting 4-vinylpyridine (4VP), N-vinylformamide (NVF), and 1-vinylimidazole (1VIm) onto electron beam irradiated ETFE and FEP films, the basic membrane matrices ETFE-graftpoly( 4VP), FEP-graft-poly(4VP), ETFE-graft-poly(1VIm), and ETFE-graft-poly(vinylamine), after subsequent hydrolysis of ETFE-graft-poly(NVF), can be obtained. These matrices are doped with phosphoric acid to produce acid–base composite materials that exhibit high proton conductivities up to 100 mScm1 at high temperatures (120 8C) and no humidification. The produced membranes are robust, flexible, and mechanically stable even at high doping levels and endure temperatures of up to 160 8C. Preliminary tests in H2/O2 fuel cells provide power densities between 75 and 150 mAcm2 at 120 8C without humidification. C. Schmidt, G. Schmidt-Naake Institut fu¨r Technische Chemie, Technische Universita¨t Clausthal, Erzstra?e 18, 38678 Clausthal-Zellerfeld, Germany Fax: (t49) 5323 72 3655; E-mail: gudrun.schmidt@tu-clausthal.de 1164 Macromol. Mater. Eng. 2007, 292, 1164–1175 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim DOI: 10.1002/mame.200700188

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