Enhanced proton conductivity under low humidity of sulfonated poly(ether ether ketone) composite membrane enabled by multifunctional phosphonic acid polymeric submicrocapsules
作者： Lingli Nie , Hao Dong , Xi Han , Guangwei He , Hong Wu
DOI: 10.1016/J.JPOWSOUR.2013.04.009
关键词:
摘要: Abstract Phosphonic acid polymeric submicrocapsules (PASCs) are synthesized and incorporated into a sulfonated poly(ether ether ketone) (SPEEK) matrix to prepare composite membranes. The microstructure physicochemical properties of the PASCs membranes characterized by transmission electron microscopy (TEM), energy dispersive X-ray (EDX), field emission scanning microscope (FESEM), thermogravimetric analysis (TGA) Fourier transform infrared spectroscopy (FTIR). Compared with SPEEK control membrane, PASC-filled exhibit elevated water uptake proton conductivity at 25 °C 100% relative humidity (RH). depends strongly on content within Under 40 °C 20% RH, membrane filled 15 wt.% (128 nm lumen) shows highest 0.0142 S cm −1 after 90 min testing, about twelve times higher than that (0.0011 S cm ), which is positively correlated retention membrane. These results suggest may find encouraging application as efficient water-retention proton-conduction materials in exchange fuel cells (PEMFCs).
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