【摘 要】
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Pure-phase electrolytic Pb02 were added into the electrolyte of all-lead single flow batteries.And then,a suspension in which Pb02 powder was dispersed evenly in the electrolyte was formed.As a result
【机 构】
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北京防化研究院,北京,100191
论文部分内容阅读
Pure-phase electrolytic Pb02 were added into the electrolyte of all-lead single flow batteries.And then,a suspension in which Pb02 powder was dispersed evenly in the electrolyte was formed.As a result,the nucleation overpotential for the deposition of Pb02 is lowered.The deposition-dissolution polarization of the Pb02 electrode is reduced significantly.When the addition of Pb02 was in the range of 20-40 g/L,the voltage difference of charge-discharge is effectively reduced.The coulombic efficiency and energy efficiency of over 90% and 80% can be obtained at the current density of 20 mA cm.2.The cycling stability of the cell was improved remarkably.After prolonged charge-discharge cycling,Pb02 powder was progressively reduced and consumed.It caused a rise in the charging voltage and a bit decrease in the energy efficiency.At this time,a certain amount of electrolytic Pb02 was replenished in the electrolyte.The charging voltage is lowered again.Coulombic efficiency and energy efficiency decrease firstly and then increase.It guaranteed the stable cycling of the Pb0-,electrode with high efficiency and long life.
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