Li-BCX电池阴极反应行为的循环伏安法研究  

Cyclic Voltammetric Studies on Cathodic Reaction Behavior in Li-BCX Cell

作　　者：葛红花[1] 周国定[1] 吴一平[1] 刘景[1] 张俊喜[1] 

机构地区：[1]上海电力学院能源与环境工程学院,上海200090

出　　处：《上海电力学院学报》2005年第4期335-338,共4页Journal of Shanghai University of Electric Power

基　　金：国家863计划课题(2001AA602021);中国航天科工集团技术支撑基金(2001ˉHTˉSHDL);上海市自然科学基金(03ZR14052);上海市教委重点项目(030Z02);上海市重点学科建设项目(P1304)资助

摘　　要：用循环伏安法研究了玻碳电极上Cl2,Br2,BrCl对1M LiAlCl4 / SOCl2电解液的阴极还原过程的影响.结果显示,该电解液在玻碳电极上的阴极还原过程出现一个不可逆的SOCl2还原峰,峰电位～2.6 V(相对于Li/Li+参比电极,下同).电极经4.9 V极化5 min预处理,出现氧化产物SOCl2(～3.6 V)和Cl2(～3.3 V)的还原峰.电解液中加入Cl2后,Cl2还原峰增大,加入Br2则在～3.1 V出现Br2还原峰,同时～2.6 V对应的SOCl2还原峰电流下降;电解液中加入BrCl后同时存在着Cl2 和Br2的还原峰,随BrCl浓度的增加,Cl2还原峰增大,而Br2还原峰减小,SOCl2还原峰逐渐消失.The influence of Cl2, Br2 and BrCl on the cathodic reduction process of 1M LiAlCl4/SOCl2 solution is studied in cyclic voltammetry method. The results show that an irreversible reduction peak of SOCl2 at about 2.6V （vs Li/Li^＋, the same as below） appears during cathodic process of 1M LiAlCl4/SOCl2 solution on glassy carbon electrode. After being pretreated at 4.9 V for 5 minutes, the reduction peaks of SCl2 （-3.6V） and Cl2 （-3.3V） as oxidation products are found. The addition of Cl2 to the solution enhances the reduction peaks at -3.3V; and the addition of Br2 causes the Br2 reduction peaks at -3.1V to appear; the reduction peak currents of SOCl2 drop in both cases. The addition of BrCl to 1M LiAlCl4/SOCl2 solution makes the existence of both Cl2 and Br2 reduction peaks. With the increase in the BrCl concentration, the Cl2 reduction peaks are raised but the peaks of Br2 decline, and the peaks of SOCl2 gradually disappear.

关 键 词：循环伏安 SOCl2 BCX电池 阴极反应 

分 类 号：O646.21[理学—物理化学]