多硫化钠——溴化钠氧化还原液流电池研究  

Study on sodium polysulfide/bromide redox flow cell

作　　者：赵平[1,2] 张华民[1] 周汉涛[1,2] 胡经纬[1,2] 衣宝廉[1] 

机构地区：[1]中国科学院大连化学物理研究所燃料电池工程中心 [2]中国科学院研究生院,北京100039

出　　处：《电源技术》2005年第5期322-324,共3页Chinese Journal of Power Sources

基　　金：中国科学院领域前沿项目-大连化物所创新基金项目(DICP-K2002D3)

摘　　要：在全电池中用稳态方法研究了不同电极材料对电池正负极电化学反应极化行为的影响。以聚丙腈碳毡为正极材料,泡沫镍为负极材料,4mol/LNaBr、1.3mol/LNa2S4为正、负极电解液,测定了(28±1)℃时电池的库仑效率、电压效率、能量效率及电池的能量密度随充放电电流密度的变化规律,分析了大电流密度下电池电压效率下降的原因。以聚丙腈碳毡及泡沫镍为正负极材料所组成的电池能量效率约71%,能量密度约66.4mW/cm2(50mA/cm2充放电),电池的欧姆内阻压降是大电流密度下电池电压效率下降的主要原因。The effect of different electrode materials on polarization performance of positive and negative electrochemical reactions of polysulfide/bromide redox flow cell(PS-Br RFC) is investigated by the method of steady-state polarization in a whole cell with external reference electrodes. Polyacrylonitrile(PAN)-based carbon felt and foamed nickel are used as positive and negative electrode material, 4 mol/LNaBr and 1.3 mol/L Na2S4 as positive and negative electrolyte for PS-Br RFC, respectively. The regularity of variation of Coulombic, voltage and energy efficiency and power density of this kind of PS-Br RFC is determined at the temperature of (28±1) ℃.The causes of decline of voltage efficiency(VE) at high charge & discharge current density are analysed. The results show that the PS-Br RFC we designed have high performance. The energy efficiency is up to 71%, and the power density is about 66.4 mW/cm2 (charge & discharge current density 50 mA/cm2). The internal ohmic resistance drop of the cell dominates the loss of the VE.

关 键 词：多硫化钠 泡沫镍 聚丙腈碳毡 液流电池 

分 类 号：TM911.18[电气工程—电力电子与电力传动]