摘要
以泡沫铅和铸造板栅为负极集流体,组装阀控铅酸(VRLA)蓄电池,并进行充放电循环测试,结果表明:在填涂相同的负极活性物质条件下,泡沫铅VRLA电池不仅负极活性物质利用率、容量高,并且充电接受能力好.对放电态的两种板栅负极分别进行循环伏安(CV)、电化学阻抗(EIS)测试和SEM观察,并采用计时安培法测量了两种负极的真实表面积.结果表明,放电态泡沫铅负极的氧化峰的峰值电势较负,还原峰的峰值电势略正,泡沫铅负极氧化峰、还原峰的峰值电流更大,放电态的泡沫铅负极的电化学反应电阻小,真实表面积大,活性物质中的PbSO4结晶颗粒较小,表明泡沫铅有利于提高VRLA电池的充电接受能力.
Lead foam and cast grid were used as the negative electrode for valve-regulated lead acid （VRLA） batteries. Results of charge-discharge cycle test show that, when pasted the same negative active material （ NAM）, both the utilization of NAM and the capacity of lead foam VRLA battery are higher than those of cast grid VRLA battery, and lead foam VRLA battery has better charge acceptance. Cyclic vohammetry （ CV）, electrochemical impedance spectroscopy （EIS） and SEM were applied to the two kinds of negative electrodes at the state of discharge, and the real surface areas were tested by chronoamperometry. The results show that compared with the cast grid negative electrode at the state of charge, the oxidization peak of lead foam is a little negative and the reduction peak is positive ; the values of the current for the oxidization peak and the reduction peak are larger; electrochemical reaction resistance is smaller; real surface area is larger; size of PbSO4 crystals formed in the NAM is smaller; and that lead foam to the charge reaction.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2006年第5期801-804,共4页
Journal of Harbin Institute of Technology
关键词
泡沫铅
板栅
负极
充电接受能力
lead foam
grid
negative electrode
charge acceptance
