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铅酸蓄电池负极活性物质硫酸铅颗粒长大造成的不可逆硫酸盐化是电池早期失效的主要原因之一.本文在合成不同粒径硫酸铅的基础上,借助粉末微电极技术,采用循环伏安法研究了不同粒径硫酸铅颗粒的电化学活性及其可能的电化学活化途径.结果表明,粒径10μm左右硫酸铅颗粒的电化学活性低于粒径2μm左右硫酸铅粉末,经5mV/s的100周循环伏安扫描后,大粒径硫酸铅也可以一定程度上被再活化,峰电流提高10倍以上;非对称循环伏安法可以有效地缩短电极活化所需时间,而快速的循环伏安扫描活化效果较差.
Lead-acid battery negative active material Lead sulfate particles caused by the growth of irreversible sulfation is one of the main battery failure in the early. In this paper, the synthesis of different particle size lead sulfate, based on the use of powder microelectrode technology, the use of cyclic voltammetry The electrochemical activities of lead sulfate particles with different particle sizes and their possible electrochemical activation pathways were investigated. The results showed that the electrochemical activity of lead sulfate particles with particle size of about 10μm was lower than that of lead sulfate particles with particle size of about 2μm. After 5mV / s After 100 weeks of cyclic voltammetry, the large particle size lead sulfate can be reactivated to a certain degree and the peak current can be increased by more than 10 times. Asymmetric cyclic voltammetry can shorten the time required for electrode activation effectively, and the rapid cyclic voltammetry An scan activation is less effective.