Solid polymer electrolyte based on sulfonated polysulfone membranes and acidic silica for direct methanol fuel cells

被引：32
|
作者：
Lufrano, F. [1 ]
Baglio, V. [1 ]
Di Blasi, O. [1 ]
Staiti, P. [1 ]
Antonucci, V. [1 ]
Arico, A. S. [1 ]
机构：
[1] Ist Tecnol Avanzate Energia Nicola Giordano, CNR ITAE, I-98126 St Lucia, Italy
来源：
SOLID STATE IONICS | 2012年 / 216卷
关键词：
Direct methanol fuel cells; Sulfonated polysulfone; Composite membranes; Acidic silica; Acid filler; PROTON-EXCHANGE MEMBRANES; ELEVATED-TEMPERATURE; COPOLYMERS; DMFC; CONDUCTIVITY; TRANSPORT;
D O I：
10.1016/j.ssi.2012.03.015
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 sulfonated polysulfone and acidic silica filler were prepared and investigated for direct methanol fuel cells. A significant influence of nanosized acidic silica on composite membrane properties was observed. A better distribution of acidic silica than bare silica was found in the membranes as well as a higher ionic conductivity of acidic silica membrane. The composite membranes based on sulfonated polysulfone modified silica (SPSf-SiO2-S) and bare silica (SPSf-SiO2) showed also an increase of DMFC performance compared to bare SPSf. The best electrochemical performance was obtained with the composite SPSf-SiO2-S membrane that showed satisfactory proton conductivity, low methanol crossover and low swelling in comparison to bare SPSf membrane. Methanol crossover currents of 20, 25 and 31 mA cm(-2) were measured for SPSf-SiO2-S, SPSf-SiO2 and SPSf membranes, respectively. The highest DMFC performance of 60 mW cm(-2) was obtained with the composite acidic silica-SPSf membrane (SPSf-SiO2-S) at 60 degrees C. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：90 / 94
页数：5
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