摘要
制备了3种聚偏氟乙烯(PVDF)基离子交换膜,比较了面电阻、离子交换容量(IEC)、含水率和钒离子渗透速率。PVDF与丙烯磺酸钠(SAS)共混制备的PVDF-SAS膜的面电阻最小,为1.2Ω.cm2,IEC达到1.16 mmol/g。FT-IR分析表明:这种膜在制备过程中,SAS的C C键在长时间高温后发生了聚合反应,与PVDF形成了互穿网络结构。自放电实验表明:所制备的膜在开路状态下,钒离子渗透速率小于8.8×10-3V/h。
Three kinds of polyvinylidene fluoride (PVDF) based ion exchange membranes were prepared, their area resistance,ion exchange capacity(IEC), water content and vanadium ion permeability ratio were compared. The PVDF-sodium allylsulfonate (SAS) membrane prepared with a homogeneous solution of PVDF and SAS had the lowest area resistance of 1.2 Ω2-cm2,its IEC was 1.16 mmol/g. FT-IR analysis showed that the C =C bond of SAS polymerized after long time under high temperature and formed inter network structure with PVDF during the processes of the membranes formation. Self-discharge test showed that the vanadium ions permeation rate of the prepared membrane was below 8.8 x 10-3 V/h at open circuit condition.
出处
《电池》
CAS
CSCD
北大核心
2009年第2期68-70,共3页
Battery Bimonthly
基金
国家"863"项目(2007AA05Z245)
国家自然科学基金项目(20676068
20876086)
关键词
全钒液流电池(VRB)
离子交换膜
聚偏氟乙烯(PVDF)
面电阻
钒离子渗透
all vanadium redox flow battery (VRB)
ion exchange membrane
polyvinylidene fluoride (PVDF)
area resis- tance
vanadium ions permeation