期刊
JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS
卷 56, 期 6, 页码 383-394出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00222348.2017.1316652
关键词
Fuel cells; Nafion (R); nanosilica; phosphotungstic acid; proton conductivity
资金
- Shiraz Branch, Islamic Azad University, Shiraz, Iran
The preparation and characterization of a new type of nanocomposite polyelectrolyte membrane (PEM), based on Nafion (R) (E. I. du Pont de Nemours and Co., Ltd., for its copolymer of tetrafluoroethylene and perfluorinated vinyl ether) and sulfonic acid (-SO3H) or phosphotungstic acid (PWA) modified nanosilica (Si-SO3H or Si-PWA, respectively), for direct methanol fuel cell (DMFC) applications are described. Physical characteristics of these manufactured nanocomposite membranes were investigated by scanning electron microscopy (SEM), water uptake, methanol permeability and ion exchange capacity, as well as proton conductivity. The Nafion (R)/Si-PWA and Nafion (R)/Si-SO3H membranes showed higher proton conductivity, lower methanol permeability and, as a consequence, a higher selectivity parameter, in comparison to the neat Nafion (R) or Nafion (R)/pristine nanosilica membranes. The obtained results indicated that both the Nafion (R)/Si-PWA and Nafion (R)/Si-SO3H membranes could be utilized as promising polyelectrolyte membranes for direct methanol fuel cell applications.
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