Membranes based on phosphotungstic acid and polybenzimidazole for fuel cell application

被引：177
作者：
Staiti, P
Minutoli, M
Hocevar, S
机构：
[1] CNR, Inst Transformat & Storage Energy, I-98126 Messina, Italy
[2] Natl Inst Chem, Lab Catalysis & Chem React Engn, Ljubljana 1001, Slovenia
来源：
JOURNAL OF POWER SOURCES | 2000年 / 90卷 / 02期
关键词：
proton conductivity; solid electrolyte; phosphotungstic acid; polybenzimidazole; membrane; fuel cell;
D O I：
10.1016/S0378-7753(00)00401-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Composite membranes based on phosphotungstic acid (PWA) adsorbed on silica (SiO2) and polybenzimidazole (PBI) have been prepared and their physico-chemical properties have been studied. The membranes with high tensile strength and thickness of less than 30 mu m can be cast. They are chemically stable in boiling water and thermally stable in air up to 400 degrees C. Proton conductivity is influenced by the temperature (range: 30-100 degrees C), relative humidity and PWA loading in the membrane. Maximum conductivity of 3.0 x 10(-3) S/cm is obtained at 100% relative humidity and 100 degrees C with membrane containing 60 wt.% PWA/SiO2 in PBI. Conductivity measurements performed at higher temperatures, in the range from 90 degrees C to 150 degrees C, give almost stable values of 1.4-1.5 X 10(-3) S/cm at 100% relative humidity. (C) 2000 Elsevier Science S.A. All rights reserved.
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页码：231 / 235
页数：5
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