A method for preparing electrode active materials of lead-acid batteries in pairs by electrochemical method

A technology for electrode active materials and lead-acid batteries, applied in battery electrodes, lead-acid batteries, battery recycling, etc., to achieve the effects of simplifying operating units, improving product quality, and reducing energy consumption

Active Publication Date: 2018-08-31
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially for the particularity of the lead nitrate aqueous solution containing nitric acid, combined with the particularity of the electrode active material of the lead storage battery, lead dioxide and lead are directly electrochemically prepared in pairs with the lead nitrate aqueous solution, and the prepared lead dioxide and lead are directly used as lead The use of battery electrode active materials not only solves the technical and economic problems existing in the recovery of lead from the existing lead nitrate aqueous solution, but also realizes the large-scale recycling of lead from waste lead batteries

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  • A method for preparing electrode active materials of lead-acid batteries in pairs by electrochemical method

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Embodiment 1

[0046] Such as figure 1 As shown, a method for preparing the active material of the lead battery electrode in pairs by an electrochemical method, that is, the method in which the lead ion in the aqueous solution undergoes electrochemical oxidation and reduction reactions at the anode and the cathode to prepare the positive and negative active materials of the lead battery. In particular, a kind of lead nitrate obtained by leaching lead monoxide with nitric acid from the lead paste of waste lead storage battery is used as raw material, and the Pb in the aqueous solution is made 2+ Oxidation reaction occurs at the anode to obtain lead dioxide, which is used as the positive electrode active material of the lead storage battery; Pb 2+ A reduction reaction occurs at the cathode to obtain metallic lead, which is used as the negative electrode active material of the lead storage battery; the nitric acid in the electrolyte is regenerated, and is recycled as a leaching agent for dissol...

Embodiment 2

[0051] (1) Electrode substrate preparation: mechanically grind the netted titanium substrate, degrease the surface in aqueous hydroxide solution, etch in oxalic acid solution, and wash with water to obtain a surface-treated titanium substrate; use the obtained titanium metal as an electrode matrix, made of SnCl 4 , SbCl 3 , citric acid, and ethylene glycol to form a precursor, wherein the molar ratio of ethylene glycol to citric acid is 2.0:1. The molar ratio of Sn to ethylene glycol in the precursor is 1.0:6.0, and the total molar ratio of Sb to ethylene glycol is 1.0:24.0. The precursor solution is coated on the obtained electrode substrate by the coating method. In the thermal decomposition equipment, the obtained titanium substrate is dried at 100 ° C, and then roasted at 520 ° C. The coating-drying roasting operation is repeated 20 times. The obtained titanium substrate electrodes with metal oxides on the surface are respectively used as the anode and cathode for the ne...

Embodiment 3

[0055] (1) Electrode matrix preparation: positive and negative matrix electrodes were prepared respectively.

[0056] The plate-shaped metal titanium substrate is mechanically polished, the surface is degreased in an aqueous solution of hydroxide and carbonate, etched in an oxalic acid solution, and a surface-treated titanium substrate is obtained by washing with water; the obtained metal titanium substrate is used as an electrode substrate, by SnCl 4 , SbCl 3 , PbCl 2 , citric acid, and ethylene glycol to form a precursor, wherein the molar ratio of ethylene glycol to citric acid is 6.0:1, the molar ratio of Sn to ethylene glycol in the precursor is 1.0:24.0, and SbCl 3 and PbCl 2 The ratio to ethylene glycol is 1.0:24.0 respectively, and the precursor of the intermediate layer coating is coated on the obtained electrode substrate by the coating method; in the thermal decomposition equipment, the obtained titanium substrate electrode is dried at 50 °C, Baking treatment at...

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Abstract

The invention relates to a method for preparing electrode active materials of lead storage batteries in pairs by electrochemical method. The method uses lead nitrate obtained by leaching lead monoxide from lead paste of waste lead storage batteries with nitric acid as raw material, and adopts electrochemical method to make the aqueous solution Pb2+ in the anode undergoes an oxidation reaction to obtain lead dioxide, which is used as the positive active material of the lead-acid battery; Pb2+ undergoes a reduction reaction at the cathode to obtain metallic lead, which is used as the negative active material of the lead-acid battery; the nitric acid in the electrolyte is regenerated and used as a dissolved lead paste The leaching agent of lead monoxide in the medium is recycled. The invention not only makes the lead paste of waste lead-acid batteries be utilized as resources, but also realizes the recycling of nitric acid solution, the process is reasonable, the electrochemical reaction process is easy to control, the production process is safe and reliable, and the comprehensive utilization of lead resources is greatly reduced The cost of utilization is favorable for large-scale industrialization, and it is an environment-friendly technology for comprehensive utilization of lead resources of waste lead storage batteries.

Description

technical field [0001] The present invention relates to a kind of method that electrochemical method prepares the electrode active material of lead storage battery in pairs, namely the Pb in the aqueous solution 2+ The invention relates to a method for preparing positive and negative active materials of a lead storage battery by performing electrochemical oxidation and reduction reactions on the anode and the cathode respectively. In particular, a kind of lead paste of waste lead storage battery is treated with nitric acid (HNO 3 ) lead nitrate obtained after leaching lead monoxide (PbO) is used as raw material, adopts electrochemical method to make the Pb in the aqueous solution 2+ Oxidation reaction at the anode produces lead dioxide (PbO 2 ), as the positive electrode active material of lead storage battery; Pb 2+ A reduction reaction occurs at the cathode to obtain metallic lead (Pb), which is used as the negative active material of the lead-acid battery; the nitric aci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M4/56H01M4/38H01M10/06
CPCH01M4/38H01M4/56H01M10/06H01M10/54Y02E60/10Y02W30/84
Inventor 王雅琼吕丽许文林吕佳乐赵宣李宝同
Owner YANGZHOU UNIV
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