Composite Ormosil/Nafion membranes as electrolytes for direct methanol fuel cells

被引：19

作者：

D'Epifanio, Alessandra ^{[1
]}

Mecheri, Barbara ^{[1
]}

Fabbri, Emiliana ^{[1
]}

Rainer, Alberto ^{[1
]}

Traversa, Enrico ^{[1
]}

Licoccia, Silvia ^{[1
]}

机构：

[1] Univ Roma Tor Vergata, Dept Chem Sci & Technol, I-00133 Rome, Italy

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2007年 / 154卷 / 11期

关键词：

D O I：

10.1149/1.2778225

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Composite Ormosil/Nafion membranes were prepared and characterized for use as electrolytes in direct methanol fuel cells (DMFCs). An organosilane derivative (sulfonated diphenylsilanediol, SDPSD) was selected as a filler of the Nafion matrix. The composite membranes were characterized by electrochemical impedance spectroscopy, differential scanning calorimetry, and solvent uptake measurements. The composite membranes exhibited higher proton conductivity and enhanced stability than the reference unfilled Nafion membrane, due to the occurrence of an effective interaction between the filler and the polar cluster of the polymer matrix. Polarization curves in a DMFC were acquired and the results showed that the performance of the composite membrane was superior to that of unfilled Nafion due to a reduced methanol permeation rate, as well as to enhanced proton conductivity and thermal stability of the membrane. Due to its satisfactory properties, the composite Nafion/SDPSD membrane has a potential use as electrolyte in DMFCs operating at intermediate temperatures.

引用

页码：B1148 / B1151

页数：4

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