碱性电解液中的还原剂对MH-Ni电池性能的影响  

Influence of reducing agent in alkaline solution on electrochemical characteristics of Ni MH battery

作　　者：闫德意 程骞[1] 崔涛 

机构地区：[1]天津和平海湾电源集团有限公司新型电源技术中心

出　　处：《电源技术》1998年第6期270-272,共3页Chinese Journal of Power Sources

基　　金：天津市自然科学基金

摘　　要：系统研究了碱性电解液中的还原剂对ＭＨ－Ｎｉ电池电化学性能的影响。实验使用典型ＡＢ５型合金ＭｍＮｉ３．５５－Ｃｏ０．７５Ｍｎ０．４Ａｌ０．３泡沫镍负极及Ｎｉ（ＯＨ）２泡沫镍正极，制成ＡＡ型电池，并注入２．６ｇ６．８ｍｏｌ／ＬＫＯＨ＋０．５ｍｏｌ／ＬＬｉＯＨ＋０．００５ｍｏｌ／ＬＫＢＨ４溶液，封口静置。参照电池的电解液则为２．６ｇ６．８ｍｏｌ／ＬＫＯＨ＋０．５ｍｏｌ／ＬＬｉＯＨ。在电池化成后，参照电池没有喷爬碱，而实验电池却高达３０％。在２５０个充放电循环以后可较明显看出实验电池的寿命差于参照电池。在充放电循环过程中，实验电池的放电平台逐渐低于参照电池的放电平台。实验电池的内压略高于参照电池的内压。实验电池注同量碱液的时间比参照电池延长大约５倍，并造成封口模具腐蚀加重。本研究结果表明部分厂家在碱液中添加微量还原剂的方法对电池综合性能及其规模生产都是不利的。The research on the influence of reducing agent in alkaline solution on electrochemical characteristics of Ni MH battery were provided. Type AB 5 MmNi 3.55 Co 0.75 Mn 0.4 Al 0.3 alloy negative electrode and Ni (OH) 2 positive electrode based on nickel form were used to prepared type AA battery. A test battery was injected with 6.8mol/L KOH+0.5 mol/L LiOH+0.005mol/L KBH 4 solution of 2.6g; a reference battery was injected with 6.8mol/L KOH+0.5mol/L LiOH solution of 2.6g, followed by formatich after sealing process. There was no leakage of reference battery after formation, but 30% of the test battery was leaked. After the 250 charge/discharge cycle, the durability of the test battery become werse than that of the reference battery. During charge/discharge cycles the test battery showed lower and lower discharge plateau than the reference battery. The test battery exhibited a little higher internal pressure than the reference battery. For the injection time of alkaline solution, the test battery was 5 times as long as the reference batterys, which accompanied by a serious corrosion of sealing models. The result showed that the process of adding the trace reducing agant into electrolyte solution, which was used by some producers, was unfavorable to the comprehensive characteristics and the mass production of Ni MH battery.

关 键 词：MH-NI电池 碱性电解液 还原剂 碱性蓄电池 

分 类 号：TM912.2[电气工程—电力电子与电力传动]