Electrolyte and method for preparing lead and lead dioxide through electrochemical deposition

Abstract

The invention discloses an electrolyte and method for preparing lead and lead dioxide through electrochemical deposition. The method comprises five unit operation steps of supporting electrolyte solution preparation, electrolyte preparation, electrochemical deposition, washing and drying; Pb < 2 + > in the electrolyte is subjected to a reduction reaction at a cathode to obtain lead; the lead obtained through deposition can be directly used as a negative active material of a lead storage battery; meanwhile, Pb < 2 + > is subjected to oxidation reaction at an anode to obtain lead dioxide; and the lead dioxide obtained through deposition can be directly used as a positive active material of the lead storage battery. According to the electrolyte and method for preparing lead and lead dioxide through electrochemical deposition, the solution composed of lead trifluoromethanesulfonate, trifluoromethanesulfonic acid alkali metal salt, trifluoromethanesulfonic acid and water is adopted as the electrolyte, the paired electrochemical reaction of Pb < 2 + > is achieved, the efficiency and the energy utilization rate of the electrochemical deposition process are improved, the clean production requirements of energy conservation and emission reduction are met, economic value is achieved, and remarkable environmental and social benefits are also achieved.

Description

technical field [0001] The invention relates to an electrolytic solution and a method for preparing lead and lead dioxide by electrochemical deposition. The electrolytic solution is composed of lead trifluoromethanesulfonate, alkali metal trifluoromethanesulfonate, trifluoromethanesulfonic acid and water The preparation process of lead and lead dioxide by electrochemical deposition includes five unit operation steps of supporting electrolyte solution preparation, electrolyte preparation, electrochemical deposition, washing, and drying. 2+ A reduction reaction occurs at the cathode to obtain lead, and the deposited lead can be directly used as the negative electrode active material of the lead storage battery; at the same time, Pb 2+ Oxidation reaction occurs at the anode to obtain lead dioxide, and the deposited lead dioxide can be directly used as positive electrode active material of lead storage battery, which belongs to the technical field of material preparation. Backgr...

AI Technical Summary

Problems solved by technology

The lead-making process brings problems such as long process flow, high energy consumption, and serious environmental pollution to the resource utilization of lead-containing materials in waste lead-acid batteries.

[0013] (2) The existing technology is difficult to meet the requirements of PbO and PbCO in the process of resource utilization of lead-containing materials. 3 direct utilization of these important lead-containing compounds

No matter the preparation of lead dioxide by anodic oxidation or the preparation of lead by cathodic reduction, only the anode reaction or cathode reaction in the electrochemical reactor is used, and the effective products prepared by a single electrode have the problems of low utilization rate of the electrochemical reactor and high energy consumption.