Novel sulfonated poly (ether ether ketone)/phosphonic acid-functionalized titania nanohybrid membrane by an in situ method for direct methanol fuel cells

被引:62
作者
Wu, Hong [1 ,2 ,3 ]
Cao, Ying [1 ,2 ]
Li, Zhen [1 ,2 ]
He, Guangwei [1 ,2 ]
Jiang, Zhongyi [1 ,2 ]
机构
[1] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Sch Chem Engn & Technol, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China
[3] Tianjin Univ, Tianjin Key Lab Membrane Sci & Desalinat Technol, Tianjin 300072, Peoples R China
关键词
Phosphonic acid; In situ sol-gel process; Titania; Sulfonated poly (ether ether ketone); Nanohybrid membranes; Proton conductivity; SOL-GEL PROCESS; PROTON-EXCHANGE MEMBRANES; PHOSPHONIC ACID; ELECTROLYTE MEMBRANES; INTERMEDIATE-TEMPERATURE; NANOCOMPOSITE MEMBRANES; COMPOSITE MEMBRANE; HYBRID MEMBRANES; PROTOGENIC GROUP; LOW-HUMIDITY;
D O I
10.1016/j.jpowsour.2014.09.134
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Sulfonated poly (ether ether ketone)/phosphonic acid-functionalized titania nanohybrid membranes are prepared by an in situ method using titanium tetrachloride (TiCl4) as inorganic precursor and amino trimethylene phosphonic acid (ATMP) as modifier. Phosphonic acid-functionalized titania nanoparticles with a uniform particle size of similar to 50 nm are formed and dispersed homogeneously in the SPEEK matrix with good interfacial compatibility. Accordingly, the nanohybrid membranes display remarkably enhanced proton conduction property due to the incorporation of additional sites for proton transport and the formation of well-connected channels by bridging the hydrophilic domains in SPEEK matrix. The nanohybrid membrane with 6 wt. % of phosphonic acid-functionalized titania nanoparticles exhibits the highest proton conductivity of 0.334 S cm(-1) at 65 degrees C and 100% RH, which is 63.7% higher than that of pristine SPEEK membrane. Furthermore, the as-prepared nanohybrid membranes also show elevated thermal and mechanical stabilities as well as decreased methanol permeability. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:544 / 553
页数:10
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