文献类型：期刊文献

英文题名：Microscopic phase-segregated quaternary ammonia polysulfone membrane for vanadium redox flow batteries

作者：Si, Jiangju[1,2];Lv, Yang[2];Lu, Shanfu[2];Xiang, Yan[2]

第一作者：司江菊;Si, Jiangju

通讯作者：Lu, SF[1];Xiang, Y[1]

机构：[1]Xinxiang Univ, Sch Chem & Chem Engn, Xinxiang 450003, Henan, Peoples R China;[2]Beihang Univ, Sch Space & Environm, Beijing Key Lab Bioinspired Energy Mat & Devices, Beijing 100191, Peoples R China

第一机构：新乡学院化学化工学院

通讯机构：[1]corresponding author), Beihang Univ, Sch Space & Environm, Beijing Key Lab Bioinspired Energy Mat & Devices, Beijing 100191, Peoples R China.

年份：2019

卷号：428

起止页码：88-92

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20191906881814);Scopus(收录号：2-s2.0-85065058685);WOS:【SCI-EXPANDED(收录号:WOS:000473118800012)】；

基金：This work was financially supported by grants from the National Natural Science Foundation of China (No. 21722601, 51422301), the Key Research and Development Program of Beijing (Z171100000917011), and the Fundamental Research Funds for the Central Universities. We thank Beijing Synchrotron Radiation Facility for providing the beam time and Yangchun Rong in Unite Technology Limited for help with analysing the SAXS data.

语种：英文

外文关键词：Vanadium redox flow batteries; Anion-exchange membranes; Ionic selectivity; Morphology; Energy efficiency; Cycling stability

摘要：Anion-exchange membranes have been investigated for vanadium redox flow batteries. However, their commercial application is plagued by the low transportation efficiency of anions in the membranes. Inspired by a strategy for constructing an ionic highway in alkaline anion-exchange membranes to accelerate the migration of anions. Thus, a well-segregated phase morphology is achieved to construct three-dimensional anion channels via architectural design of amphiphilic quaternary ammonium polysulfone with hydrophobic hexane side chains. This unique morphology gives the membrane enhanced conductivity with less water uptake, and this thereby enables the vanadium redox flow battery that is fabricated with the microscopic phase-segregated membrane to have better voltage and energy efficiency under current densities in the range of 60-150 mA cm(-2). Furthermore, the vanadium redox flow battery using the microscopic phase-segregated membrane has excellent cycling stability. These investigations provide a universal strategy for developing of anion-exchange membranes that have high-conductivity and are stable for use in vanadium redox flow batteries.