质子传导膜制备方法放大与膜性能表征  

Scale-up of a novel proton conductive membrane and characterization for VRB application

作　　者：刘平[1] 青格乐图[1] 郭伟男[1] 陈晓[1] 初晓[1] 王保国[1] 

机构地区：[1]清华大学化学工程系,北京100084

出　　处：《膜科学与技术》2012年第2期24-29,35,共7页Membrane Science and Technology

基　　金：国家自然科学基金(20876086;21076112);国家"863"课题(2007AA05Z245);国家重点基础研究发展计划(973计划)项目(2010CB227202)

摘　　要：为了满足新能源电池对质子选择性导电膜的需要,提出一种质子传导膜的新型制备工艺,并进行质子传导膜的制备工艺放大.以聚偏氟乙烯(PVDF)和烯丙基磺酸钠(SAS)为原料,成功制备长1 000mm、宽800mm的质子传导膜.膜性能测试结果显示,质子传导膜电导率随SAS质量分数变化显著.当SAS质量分数为20%时,膜电导率3.0×10-2 S/cm;膜化学稳定性良好,使用Fenton试剂氧化法测得膜剩余质量分数97.5%;屈服强度23N/mm2,膜爆破强度为2MPa;TGA分析膜分解温度高于400℃.该膜应用于全钒液流电池,自放电实验测得开路电压下降速率为1.41×10-3 V/h,库伦效率93%.结果表明,膜材料综合性能良好,有望在全钒液流电池产业化过程中得到大规模应用.This study proposed a novel approach to manufacture proton conductive membranes to meet the requirement of developing battery technology for renewable energy storage.Using polyvinylidene fluoride（PVDF） and sodium methyl allylsulfonate（SAS）,a membrane of 1 000 mm×800 mm（length×width）was successfully prepared.Its conductivity apparently changed with SAS composition.When SAS′s mass fraction was 20%,the membrane conductivity reached 3.0×10-2 S/cm.Moreover,the membranes are of advanced performance in chemical resistance and mechanical stability,remaining 97.5% of sample weight after treated in Fenton solution,bursting strength of 2.0 MPa,yield strength of 23 N/mm2 and thermal degeneration temperature above 400 ℃.The test of flow battery showed a self-discharge rate of 1.41×10-3V/h,columbic efficiency of 93%.The membrane had an overall good performance as a promising separator for the commercialization of vanadium redox flow battery（VRB）.

关 键 词：质子传导膜 全钒液流电池 电导率 电池实验 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]