Composite blend polymer membranes with increased proton selectivity and lifetime for vanadium redox flow batteries

被引:31
作者
Chen, Dongyang [1 ]
Kim, Soowhan [2 ]
Sprenkle, Vincent [2 ]
Hickner, Michael A. [1 ]
机构
[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[2] Pacific NW Natl Lab, Richland, WA 99352 USA
关键词
Vanadium redox flow battery; Proton exchange membrane; Blend; Composite; Selectivity; ETHER KETONE) MEMBRANES; HYDROTHERMAL METHOD;
D O I
10.1016/j.jpowsour.2013.01.007
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
Composite membranes based on blends of sulfonated fluorinated poly(arylene ether) (SFPAE) and poly(vinylidene fluoride-co-hexafluoropropene) (P(VDF-co-HFP)) were prepared with varying P(VDF-co-HFP) content for vanadium redox flow battery (VRFB) applications. The properties of the SFPAE-P(VDF-co-HFP) blends were characterized by atomic force microscopy, differential scanning calorimetry, and Fourier transform infrared spectroscopy. The water uptake, mechanical properties, thermal properties, proton conductivity, VO2+ permeability and VRFB cell performance of the composite membranes were investigated in detail and compared to the pristine SFPAE membrane. It was found that SFPAE had good compatibility with P(VDF-co-HFP) and the incorporation of P(VDF-co-HFP) increased the mechanical properties, thermal properties, and proton selectivity of the materials effectively. An SFPAE composite membrane with 10 wt.% P(VDF-co-HFP) exhibited a 44% increase in VRFB cell lifetime as compared to a cell with a pure SFPAE membrane. Therefore, the P(VDF-co-HFP) blending approach is a facile method for producing low-cost, high-performance VRFB membranes. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:301 / 306
页数:6
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