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Sulfonated poly(ether ether ketone)/poly(vinylpyrrolidone) acid-base polymer blends for direct methanol fuel cell application
被引:51
|作者:
Wu, HL
Ma, CCM
[1
]
Kuan, HC
Wang, CH
Chen, CY
Chiang, CL
机构:
[1] Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 30043, Taiwan
[2] Ind Technol Res Inst, Mat Res Labs, Hsinchu 310, Taiwan
[3] Hung Kuang Univ, Dept Ind Safety & Hlth, Shalu 433, Taiwan
关键词:
SPEEK;
direct methanol fuel cell;
methanol permeability;
polymer electrolyte membrane;
D O I:
10.1002/polb.20717
中图分类号:
O63 [高分子化学(高聚物)];
学科分类号:
070305 ;
080501 ;
081704 ;
摘要:
Acid-base polymer blends for polymer electrolyte membranes have been prepared by blending sulfonated poly(ether ether ketone) (SPEEK) with poly(vinylpyrrolidone) (PVP) to reduce methanol uptake and to decrease methanol permeability while maintaining high proton conductivity. The acid-base interaction occurring on the sulfonic acid group and on the tertiary amide group was characterized by FTIR and DMA. As the composition of PVP lowered than 20 wt % in the blends, the acid-base interaction causes great reduction on methanol uptake and the methanol permeability; however, the proton conductivity is still high. In this work, membrane-electrode assemblies (MEAs) have been prepared for direct methanol fuel cell (DMFC) from both blend membrane and Nafion 117. DMFC single cell performance was also evaluated. Results confirmed that SPEEK (with the degree of sulfonation (DS) = 69%) blended with PVP (M. = 1,300,000) with a ratio of 80/20 (w/w) exhibits higher open-circuit voltages (OCV) and lower polarization loss than those of Nafion 117. These acid-base blends will be suitable for DMFC application. (c) 2005 Wiley Periodicals, Inc.
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页码:565 / 572
页数:8
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