氧化还原电池氨基磺酸铈电解液的性能研究  

Investigation on cerium sulfamate electrolyte in redox battery

作　　者：熊凤姣[1] 周德璧[1] 谢志鹏[1] 陈云扬[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《电源技术》2012年第12期1804-1807,共4页Chinese Journal of Power Sources

摘　　要：采用循环伏安和极化曲线方法对氨基磺酸体系中Ce3+/Ce4+电对在Pt电极上氧化反应的动力学进行了研究。极化曲线结果表明,在较高过电位下交换电流密度j0为5.95×10-4A/cm。循环伏安结果显示:Ce3+/Ce4+电对在Pt电极上的反应是准可逆过程,计算得到303 K时Ce3+的扩散系数D为5.93×10-6cm2/s。所加阳离子NH4+和K+能提高氨基磺酸铈电解液的电导率,并可改善以氨基磺酸铈作正极电解液的氧化还原电池的充放电循环性能。The oxidation reaction kinetics of the Ce3＋/Ce4＋ couple in the sulfamic acid on platinum electrode was investigated by means of cyclic voltammetry and polarization curve. The polarization curve shows that, in a larger potential, the exchange current density j^0 is 5.95×10^-4 A/cm2. The cyclic voltammetry analysis indicates that Ce3＋/Ce4＋ redox reaction is quasireversible. The diffusion coefficient D for Ce3. at 303 K is 5.93×10^-6cm2/s. The conductivity of cerium sulfamate solution is improved significantly by adding NH4＋ and K＋.Meanwhile the charge-discharge cycle properties of redox battery, for which cerium sulfamate is used as positive electrolyte are improved.

关 键 词：氧化还原电池 氨基磺酸 动力学 碳酸盐 

分 类 号：TM911[电气工程—电力电子与电力传动]