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Preparation and properties of Cross-linked PVA/PSSA/Na-MMT composite proton exchange membranes for vanadium redox flow batter

Authors： ZHENG Ronxue, DING Fuchuan, HUANG Xuehong, LING Qidan

Units： College of Materials Science and Engineering, Key Laboratory of Polymer Science, Fujian Normal University, Fuzhou 350007

KeyWords： PVA/PSSA/Na-MMT blend membrane; ion selective separator; all vanadium redox flow battery

ClassificationCode：TM911.48

year,volume(issue):pagination： 2014,34(2):5-10

Abstract：

Cross-linked PVA/PSSA/Na-MMT (poly(vinyl alcohol) /poly(styrene sulfonic acid) /Na-montmorillonite) composite proton exchange membranes were prepared by blending PVA, PSSA and MMT in solution using GA as crosslinking agent. Infrared spectrum (IR) proves that PVA cross-linked with PSSA by esterification between sulfonic acid groups and hydroxyl groups. Thermal gravimetric analysis (TGA) shows the composite membrane has good thermal resistance. The MMT has been uniformly dispersed in the composite membrane observed by scanning electron microscopy (SEM). The glutaraldehyde (GA) and Na-montmorillonite ( Na-MMT) lower water uptake and improve dimensional stability for the composite membranes. Permeability of VO2+ of blend membrane which contains 15%PSSA and 3%Na-MMT achieve 1.58×10-6 / cm2•min-1. The coulombic efficiency of single VRB reaches 43.7%.

Funds：

国家自然科学基金（61250016、60976019），教育部高等学校博士学科点专项科研基金（20093223110002），福建省自然科学基金（2013J01172），福建省教育厅项目（JB12042）

AuthorIntro：

郑榕学（1988~），男，福建人，在校硕士生，研究方向：功能高分子，电话：18305992083，E-mail：zrxwyyx@163.com.通讯作者：凌启淡，男，福建师范大学教授、博士生导师，联系方式：qdling@fjnu.edu.cn；

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