کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1283156 | 1497626 | 2009 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Preparation of PVdF/PSSA composite membranes using supercritical carbon dioxide for direct methanol fuel cells Preparation of PVdF/PSSA composite membranes using supercritical carbon dioxide for direct methanol fuel cells](/preview/png/1283156.png)
Composite membranes were prepared using supercritical carbon dioxide (scCO2) impregnation and polymerization procedures and were optimized as electrolytes by controlling the amount of divinylbenzene (DVB) for polymerization. These poly(vinylidene fluoride)/polystyrene sulfonic acid (PVdF/PSSA) membranes were characterized by various methods. The cross-sectional superficial morphology and structure of the PVdF/PSSA membranes were analyzed by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), FT-IR and small-angel X-ray scattering (SAXS). The ion exchange capacity (IEC), ion conductivity, methanol permeability and cell performance of PVdF/PSSA membranes were measured and compared with Nafion 115. As the concentration of added DVB increased, the ion conductivity and methanol permeability of the PVdF/PSSA membranes decreased. The PVdF/PSSA membrane containing 7.5 wt% DVB achieved 94% of the current density with Nafion 115.
Journal: International Journal of Hydrogen Energy - Volume 34, Issue 15, August 2009, Pages 6437–6442