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SPEEK/Zeolite/Ionic-Liquid Anhydrous Polymer Membranes for Fuel-Cell Applications
被引:32
作者:
da Trindade, Leticia G.
[1
]
Pereira, Ernesto C.
[1
]
机构:
[1] Univ Fed Sao Carlos, Dept Chem, CP 676, BR-13560970 Sao Carlos, SP, Brazil
基金:
巴西圣保罗研究基金会;
关键词:
Polymers;
Zeolites;
Ionic liquids;
Fuel cells;
PROTON-EXCHANGE MEMBRANES;
POLY(ETHER ETHER KETONE);
IONIC LIQUIDS;
COMPOSITE MEMBRANES;
ELECTROLYTE MEMBRANES;
CONDUCTING MEMBRANES;
1-BUTYL-3-METHYLIMIDAZOLIUM TRIFLUOROMETHANESULFONATE;
ELECTROCHEMICAL PROPERTIES;
TEMPERATURE;
SPEEK;
D O I:
10.1002/ejic.201601559
中图分类号:
O61 [无机化学];
学科分类号:
070301 ;
081704 ;
摘要:
Sulfonated poly(ether ether ketone) (SPEEK)/zeolite/ionic-liquid composite membranes were prepared with different amounts of 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([C4MI]CF3SO3) or 1-decyl-3-methylimidazolium trifluoromethanesulfonate ([C10MI]CF3SO3) ionic liquids (ILs). The structure of the composite membranes was investigated by FTIR-ATR spectroscopy, X-ray diffraction, atomic force microscopy, and by thermogravimetric analyses. The introduction of the IL, encapsulated in zeolite, into the SPEEK polymer leads to improvement of the water uptake, thermal stability, and proton conductivity of the composite membranes, compared with pristine SPEEK. The proton conductivity of the membranes with 1.5% and 2.0% [C4MI]CF3SO3 IL showed values of 3.34 mS cm(-1) and 5.98 mS cm(-1), respectively, under anhydrous conditions at 80 degrees C. The conductivity obtained for these membranes is about 100 times higher than for pristine SPEEK (0.038 mS cm(-1)).
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页码:2369 / 2376
页数:8
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