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-  2015 

粉末微电极研究硫酸铅颗粒的电化学活性 Investigation of Electrochemical Reactivity of PbSO_4 Particles Using Powder Microelectrode

Keywords: 硫酸盐化,铅酸蓄电池,粉末微电极,硫酸铅,活化

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Abstract:

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

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