Sulfonated poly(ether ether ketone)-based composite membrane for polymer electrolyte membrane fuel cells

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• 作者：Palanichamy Krishnan ; Jin-Soo Park ; Tae-Hyun Yang ; Won-Yong Lee ; Chang-Soo Kim
• 关键词：Zirconium phosphate sulpfophenylenphosphonate ; Sulfonated poly(ether ether ketone) ; Composite membrane ; Solid proton conductor ; Polymer electrolyte membrane fuel cell
• 刊名：Journal of Power Sources
• 出版年：2006
• 出版时间：7 December 2006
• 年：2006
• 卷：163
• 期：1
• 页码：2-8
• 全文大小：817 K

文摘

The solid proton conductor zirconium phosphate sulfophenylenphosphonate of composition Zr(HPO₄)_0.65(SPP)_1.35 where SPP denotes metasulfophenylenphosphonate was prepared in the amorphous gel form in dimethyl formamide (DMF) and characterized by ³¹P NMR. The composite membranes of SPEEK up to 50 wt. % of zirconium phosphate sulfophenylenphosphonate content were prepared by introducing the solid proton conductor from the gel. The composite membranes were characterized using FT-IR, powder X-ray diffraction, SEM, DSC/TGA. The proton conductivity of the membranes was measured under 100 % relative humidity up to 70 °C. The composite membranes had better thermal stability when compared with that of SPEEK. A three-fold increase in proton conductivity at 70 °C was observed for the composite membrane with 50 wt. % of solid proton conductor. Furthermore, the conductivity results imply that a critical percentage of proton conductor is needed to establish conduction pathways in the polymer matrix.