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Metal element-doped and carbon-coated lead powder and preparation method and application thereof

A metal element, carbon coating technology, applied in electrical components, lead-acid battery electrodes, battery electrodes, etc., can solve the problem of difficulty in obtaining powder with uniform composition, affecting the beneficial effect of carbon materials, and reducing battery cycle life. , to achieve the effect of good electrochemical performance, easy large-scale industrial production, and simple process

Active Publication Date: 2017-06-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to give full play to the beneficial role of carbon materials in the negative electrode of lead-acid batteries, two key issues must be solved: (1) electrode hydrogen evolution suppression: due to the low hydrogen evolution overpotential of water on carbon materials under acidic conditions, the incorporation of carbon The material will cause severe hydrogen evolution at the negative electrode
By controlling the microstructure and ash composition of carbon materials, adding hydrogen evolution inhibitors and other measures, the hydrogen evolution reaction of the electrode can be suppressed to a certain extent; (2) The carbon materials are uniformly introduced: the carbon materials and lead powder are mixed mechanically. If the density difference is too large, it is difficult to obtain powder with uniform composition, which will affect the beneficial effect of carbon materials.
In addition, the carbon particles will migrate to the electrode surface during the recycling process of the electrode prepared by using this powder, thereby reducing the cycle life of the battery

Method used

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  • Metal element-doped and carbon-coated lead powder and preparation method and application thereof
  • Metal element-doped and carbon-coated lead powder and preparation method and application thereof
  • Metal element-doped and carbon-coated lead powder and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0046] 0.2974g EDTA was dissolved in 150mL deionized water to obtain EDTA solution A. Dissolve 0.0127 g of cerium nitrate in 50 mL of deionized water to obtain aqueous solution B of cerium nitrate. Add solution B to solution A, stir for 10 min until the reaction is complete, and obtain solution C. Add 10g of lead powder into solution C and stir evenly, then place it in an electric blast drying oven and dry it at 80°C until the water is completely removed. After the dried product was ground uniformly, it was calcined at 500° C. for 8 h in nitrogen, cooled to room temperature, and ground to obtain a cerium-doped carbon-coated lead powder composite electrode material. Add 1 g of water and 0.8 g of sulfuric acid with a mass concentration of 50% to the composite electrode material while stirring to obtain the lead-carbon battery negative electrode lead paste. Scrape-coat the lead paste on the lead metal grid, cure at 40°C and 80% humidity for 30 hours; then dry at 80°C and humidi...

Embodiment 2

[0048] 0.2947g EDTA was dissolved in 150mL deionized water to obtain EDTA solution A. Dissolve 0.0075 g of lead nitrate in 50 mL of deionized water to obtain lead nitrate aqueous solution B. Add solution B to solution A, stir for 10 min until the reaction is complete, and obtain solution C. Add 10g of lead powder into solution C and stir evenly, then place it in an electric blast drying oven and dry it at 80°C until the water is completely removed. After the dried product was ground uniformly, it was calcined at 600° C. for 8 h in nitrogen, cooled to room temperature, and ground to obtain a lead-doped carbon-coated lead powder composite electrode material. Add 1 g of water and 0.8 g of sulfuric acid with a mass concentration of 50% to the composite electrode material while stirring to obtain the lead-carbon battery negative electrode lead paste. Scrape-coat the lead paste on the lead metal grid, cure at 40°C and 80% humidity for 30 hours; then dry at 80°C and humidity less t...

Embodiment 3

[0050] 0.2947g EDTA was dissolved in 150mL deionized water to obtain EDTA solution A. Dissolve 0.0136g of lanthanum nitrate in 50mL of deionized water to obtain indium nitrate aqueous solution B. Add solution B to solution A, stir for 10 min until the reaction is complete, and obtain solution C. Add 10g of lead powder into solution C and stir evenly, then place it in an electric blast drying oven and dry it at 80°C until the water is completely removed. After the dried product was ground uniformly, it was calcined at 600° C. for 8 h in nitrogen, cooled to room temperature, and ground to obtain a lanthanum-doped carbon-coated lead powder composite electrode material. Add 1 g of water and 0.8 g of sulfuric acid with a mass concentration of 50% to the composite electrode material while stirring to obtain the lead-carbon battery negative electrode lead paste. Scrape-coat the lead paste on the lead metal grid, cure at 40°C and 80% humidity for 30 hours; then dry at 80°C and humid...

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Abstract

Disclosed is metal element-doped and carbon-coated lead powder used as a negative electrode material of a lead-carbon battery. The lead powder is characterized in that the surfaces of lead oxide granules which constitute the lead power are coated with metal element-containing carbon; the preparation method for the lead powder comprises the steps of adding a metal element soluble salt solution which is used as a hydrogen evolution inhibitor into a complexing agent solution firstly, and mixing uniformly; after metal ions and the complexing agent are fully reacted to form a metal ion complex solution, adding lead powder into the complex solution to be fully stirred, and performing heating to remove water content to enable the surfaces of the lead powder granules to be coated with the complex; and finally, performing carbonization treatment on the product in inert gas to obtain the metal element-doped and carbon-coated lead powder. The method is characterized in that carbon coating on the lead powder and hydrogen evolution inhibition modification of the coated carbon are realized through in-situ composite in one time; and the negative electrode material, which is compounded by the metal element-doped and carbon-coated lead powder, of the lead-carbon battery has high electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries and lead-carbon batteries, and in particular relates to a metal element-doped carbon-coated lead powder composite lead-carbon negative electrode material and a preparation method thereof. Background technique [0002] Lead-carbon battery is a new type of energy storage device that combines supercapacitors and lead-acid batteries. The lead-acid battery is used as the energy source, and the supercapacitor is used as the pulse power, which improves the performance of the battery, thus making up for the deficiency that ordinary valve-regulated lead-acid batteries cannot cope with various complex use conditions. In lead-carbon batteries, the two energy storage methods of supercapacitor and lead-acid battery are integrated in an internal combination, and no special external electronic control circuit is required, so that the size of the battery is controlled, the system is simplified, and th...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/14H01M4/16
CPCH01M4/14H01M4/16H01M4/624H01M4/625H01M4/626Y02E60/10
Inventor 阎景旺张华民张洪章李先锋刘翠连黄安然李丹
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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