A study of capillary porous structure and sorption properties of Nafion proton-exchange membranes swollen in water

被引:107
作者
Divisek, J
Eikerling, M
Mazin, V
Schmitz, H
Stimming, U
Volfkovich, YM
机构
[1] Forschungszentrum Julich, Inst Werkstoffe & Verfahren Energietech, D-52425 Julich, Germany
[2] Russian Acad Sci, AN Frumkin Electrochem Inst, Moscow 117071, Russia
[3] Tech Univ Munich, Inst Festkorperphys & Tech Phys, D-85747 Garching, Germany
关键词
D O I
10.1149/1.1838699
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The standard porosimetry method (SPM) was used to study capillary porous and sorption properties of Nafion(R) proton-exchange membranes. Pore volume-size and surface-size distributions were recorded together with water distributions as a function of capillary pressure and desorption isotherms. The measurements were performed at 20 and 80 degrees C; only a small temperature effect was found for the porous volume structure. Using these data, the charge density at the inner pore surfaces was evaluated. The estimate suggested only a small degree of diffuseness of the proton double layer at the inner pore surface.
引用
收藏
页码:2677 / 2683
页数:7
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