Proton Conducting membranes obtained by doping radia

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 acidbase
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, 11641175
2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim DOI: 10.1002/mame.200700188