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

A technology of lead dioxide and electrolyte, applied in electrolysis components, electrolysis process, lead-acid battery electrodes, etc., can solve problems such as difficult to meet the direct utilization of lead-containing materials, low utilization rate of electrochemical reactor, long process flow, etc. Achieve the effect of increasing speed, reducing unit operation and reducing process

Pending Publication Date: 2021-06-29
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] An electrolytic solution and method for preparing lead and lead dioxide by electrochemical deposition, the specific steps are as follows:

[0042] (1) Preparation of supporting electrolyte solution: in a stirred tank, water, trifluoromethanesulfonic acid and lithium trifluoromethanesulfonate are mixed to prepare a supporting electrolyte solution;

[0043] (2) Electrolyte preparation: add lead oxide in the supporting electrolyte solution that makes in previous step, lead oxide and trifluoromethanesulfonic acid generate the lead trifluoromethanesulfonic acid generation reaction, obtain and prepare lead for electrochemical deposition and lead dioxide electrolyte. In the prepared electrolyte, Pb 2+ The concentration is 0.10mol·L -1 , the concentration of trifluoromethanesulfonic acid is 0.10mol L -1 , the concentration of lithium ions is 0.20mol L -1 .

[0044] (3) Electrochemical deposition: Add the electrolyte solution obtained in the previous step to the electrochem...

Embodiment 2

[0048] An electrolytic solution and method for preparing lead and lead dioxide by electrochemical deposition, the specific steps are as follows:

[0049] (1) Preparation of supporting electrolyte solution: in a stirred tank, water, trifluoromethanesulfonic acid and sodium trifluoromethanesulfonate are mixed to prepare a supporting electrolyte solution;

[0050] (2) Electrolyte preparation: add lead carbonate in the supporting electrolyte solution that makes in last step, lead carbonate and trifluoromethanesulfonic acid generate lead trifluoromethanesulfonate reaction, obtain and prepare lead for electrochemical deposition and lead dioxide electrolyte. In the prepared electrolyte, Pb 2+ The concentration of 0.60mol L -1 , the concentration of trifluoromethanesulfonic acid is 0.40mol L -1 , the concentration of sodium metal ions is 0.60mol L -1 .

[0051] (3) Electrochemical deposition: Add the electrolyte solution prepared in the previous step to the electrochemical reacto...

Embodiment 3

[0055] An electrolytic solution and method for preparing lead and lead dioxide by electrochemical deposition, the specific steps are as follows:

[0056] (1) Preparation of supporting electrolyte solution: in a stirred tank, water, trifluoromethanesulfonic acid and potassium trifluoromethanesulfonate are mixed to prepare a supporting electrolyte solution;

[0057] (2) Electrolyte preparation: add mass content and be 50% plumbous oxide and 50% lead carbonate in the support electrolyte solution that makes in last step, plumbous oxide and trifluoromethanesulfonic acid generation reaction generate lead trifluoromethanesulfonate , to prepare an electrolyte for the preparation of lead and lead dioxide by electrochemical deposition. In the prepared electrolyte, Pb 2+ The concentration is 0.40mol L -1 , the concentration of trifluoromethanesulfonic acid is 0.20mol L -1 , the concentration of potassium ions is 0.4mol L -1 .

[0058] (3) Electrochemical deposition: Add the electrol...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/18C25B1/01H01M4/16
CPCC25C1/18C25B1/00H01M4/16Y02E60/10
Inventor 许文林韩斌周阳王雅琼
Owner YANGZHOU UNIV
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