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

详细信息	查看全文 | 推荐本文 |

• 作者：F. Lufrano ; ^{lufrano@itae.cnr.it} ; V. Baglio ; O. Di Blasi ; P. Staiti ; V. Antonucci ; A.S. Aricò
• 关键词：Direct methanol fuel cells ; Sulfonated polysulfone ; Composite membranes ; Acidic silica ; Acid filler
• 刊名：Solid State Ionics
• 出版年：2012
• 期刊代码：96_01672738
• 类别：ch
• 出版时间：28 May, 2012
• 卷：216
• 期：Complete
• 页码：90-94
• 文件大小：518 K

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^鈭?#xA0;2 were measured for SPSf-SiO₂-S, SPSf-SiO₂ and SPSf membranes, respectively. The highest DMFC performance of 60 mW cm^鈭?#xA0;2 was obtained with the composite acidic silica-SPSf membrane (SPSf-SiO₂-S) at 60 掳C.