摘要
为了降低质子交换膜磺化聚芴醚酮(sulfonated poly(fluorenylether ketone),SPFEK)在全钒液流电池应用中的钒离子渗透率,采用吡咯(pyrrole,Py)单体和SPFEK为原料制备了SPFEK/PPy(polypyrrole,PPy)复合膜。在pyrrole中浸渍SPFEK膜通过氧化法聚合Py得到SPFEK/PPy复合膜,根据SPFEK膜在pyrrole中浸泡时间不同,得到一系列SPFEK/PPy复合膜。对SPFEK/PPy系列膜进行性能表征,发现随复合膜的吸水率提高,导质子率降低,抗钒离子渗透率明显增强。综合各种性能,选择综合性能最好的SPFEK/PPy-1复合膜组装全钒液流电池来评价电池性能。结果表明,相对于纯SPFEK膜,在各个电流密度下,电池的放电时间明显增长,库伦效率均增大了约5%。
In order to reduce vanadium ion permeability of the proton exchange membrane sulfonated poly fluorenyl ether ketone （SPFEK） in the vanadium redox flow battery （VRB） applications, SPFEK / PPy （polypyrrole, PPy ） composite membranes wrer prepared with pyrrole monomer and SPFEK. After dipping SPFEK membranes in the pyrrole reagent, pyrrole was polymerized by oxidation method to obtain SPFEK / PPy membranes. According to SPFEK membrane immersed in the pyrrole reagent for different time spans, we got a series of SPFEK / PPy membranse. The SPFEK / PPy membranes were characterized, the results showed that the water uptake increased, the rate of proton conductivity decreased while antivanadium ion permeability ability markedly enhanced. Integrating the above performances, choose SPFEK/PPy - 1 membrane which was of best properties to assembly vanadium redox flow battery to evaluate the battery performance. The results showed that relative to the pure SPFEK membrane, under various current densities the battery discharge time grew significantly, coulombic efficiency is about 5 percent larger than that of pure SPFEK.
出处
《中山大学研究生学刊（自然科学与医学版）》
2009年第3期65-71,共7页
Journal of the Graduates Sun YAT-SEN University(Natural Sciences.Medicine)
