新型聚合物电解质膜在液流电池中的应用  

Application of novel polymer electrolyte membrane in all vanadium redox flow battery

作　　者：王宇翔[1] 余晴春[1] 

机构地区：[1]上海交通大学燃料电池研究所,上海200240

出　　处：《电源技术》2015年第4期696-697,752,共3页Chinese Journal of Power Sources

摘　　要：选择Nafion117电解质膜作为对比,考察了含咪唑基磺化聚酰亚胺(Im-SPI)电解质膜应用于全钒氧化还原液流电池的可行性,测定了Im-SPI离子交换膜的电导率及在1.5 mol/L VOSO4溶液中VO2+离子的透过率。实验结果表明,Im-SPI膜电导率为0.10 S/cm,高于Nafion117膜;VO2+离子的渗透系数为3.43×10-7 cm2/s,稍大于Nafion117膜。单电池实验充放电电流密度60 m A/cm2时,Im-SPI膜电流效率可达99.67%,电压效率可达82.41%,能量效率相比Nafion117单电池提高了1.65%。Compared to Nafion117 electrolyte membrane, the feasibility of benzimidazole group-containing sulfonated polyimides （Im-SPI） electrolyte membrane used in al vanadium redox flow battery was investigated. The proton conductivity and VO2＋ions penetration rate in 1.5 mol/L VOSO4 solution of Im-SPI membrane were measured. The results show that the proton conductivity of Im-SPI is 0.10 S/cm, much higher than that of Nafion117 membrane, while the permeability of VO2＋is 3.43×10v-7 cm^2/s, a little higher than that of Nafion117 membrane. The single celltest shows that the coulombic efficiency and voltage efficiency of Im-SPI membrane reach 99.67%and 82.41%, and the power efficiency improves by 1.65%than that of Nafion117 membrane under the current density of 60 mA/cm2.

关 键 词：Im-SPI膜 电流效率 电压效率 

分 类 号：TM911[电气工程—电力电子与电力传动]