电化学浸渍法制备空间氢镍电池用镍电极的循环寿命研究  

Cycle Lifetime Investigation of Nickel Electrode Prepared by Electrochemical Impregnation for Application in Aerospace Nickel Hydrogen Cells

作　　者：张海昌[1] 檀立新[1] 呙成[1] 明文成[1] 任学颖[1] 

机构地区：[1]中国电子科技集团公司第十八研究所,天津300381

出　　处：《电化学》2012年第1期84-88,共5页Journal of Electrochemistry

摘　　要：以空间储能电源4.5'镍极板为对象,研究了过充电、高倍率及极板孔径对电化学浸渍电极循环寿命的影响.结果表明,5C过充电70%,电极初始容量为2.7 Ah,150次循环后容量逐渐下降,300次循环,放电容量约为1.7 Ah(保持率约63%).5C无过充电,300次循环其容量保持率约100%,1000次循环,容量保持率仍可达76%.无过充电,极板孔径及小电流活化均可改善电极循环性能.In this paper, the effects of overcharge, charge-discharge C rate and pore size 4.5＇ electrochemical impregnated nickel electrode were investigated. In the case of the on cycle lifetime of electrode was overcharged to 170% of nominal capacity,the initial capacity of the electrode could be maintained 2.7 Ah up to 150 cycles without deterioration and a discharge capacity of 1.7 Ah （remaining 63% of 2.7 Ah ） could be delivered after 300 cycles. Without overcharge, more than 300 charge-discharge cycles could be realized without loss of capacity and a discharge capacity of electrode could be maintained about 76% of initial capacity even after 1000 cycles. The experimental results also showed that without overcharge the increase in pore size and activation with small current could improve the electrode cycle capability.

关 键 词：空间氢镍电池 镍电极 电化学浸渍 循环寿命 

分 类 号：TM912.2[电气工程—电力电子与电力传动]