Preparation method for composite negative electrode of lead-carbon battery, and composite negative electrode and application thereof

A lead-carbon battery and negative electrode technology, applied in the direction of lead-acid battery electrodes, lead-acid batteries, etc., can solve the problems of excessive density difference and difficulty in obtaining powder with uniform composition, and achieve high charge and discharge reversibility, easy Large-scale industrial production and the effect of increasing the bulk density

Active Publication Date: 2018-03-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical method is used to mix the carbon material and the lead powder. Due to the large difference in density between the two, it is difficult to obtain a powder with uniform composition.

Method used

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  • Preparation method for composite negative electrode of lead-carbon battery, and composite negative electrode and application thereof
  • Preparation method for composite negative electrode of lead-carbon battery, and composite negative electrode and application thereof
  • Preparation method for composite negative electrode of lead-carbon battery, and composite negative electrode and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Weigh 1.1032 g of analytically pure lead nitrate, add it into 100 mL of deionized water, and stir until completely dissolved to obtain a lead nitrate solution. Add 4.0g of capacitive activated carbon into the lead nitrate solution, stir well until the activated carbon is completely soaked and evenly dispersed in the lead nitrate solution, then add 0.97g of sulfuric acid with a density of 1.245g / mL (25°C) dropwise while stirring, Stirring was continued for 10 min to complete the reaction. After filtration and separation, the obtained composite material was dried at 100° C. for 2 hours to remove moisture therein. Finally, the dried product was treated at 210° C. for 2 h under the protection of nitrogen to remove the nitrate groups therein to obtain a lead sulfate-modified activated carbon composite material with a lead sulfate content of 20%. The bulk density of activated carbon modified by lead sulfate is determined by GB / T 16913.3-1997 Dust Physical Properties Test Met...

Embodiment 2

[0045] Weigh 2.2064 g of analytically pure lead nitrate, add it to 100 mL of deionized water, and stir until completely dissolved to obtain a lead nitrate solution. Add 3g of capacitive activated carbon into the lead nitrate solution, stir until the activated carbon is completely soaked and evenly dispersed in the lead nitrate solution, then add 1.94g of sulfuric acid with a density of 1.245g / mL (25°C) dropwise while stirring, continue Stir for 10 min to complete the reaction. After filtration and separation, the obtained composite material was dried at 100° C. for 2 hours to remove moisture therein. Finally, the dried product was treated at 210° C. for 2 h under the protection of nitrogen to remove the nitrate groups therein to obtain a lead sulfate-modified activated carbon composite material with a lead sulfate content of 40%. The bulk density of activated carbon modified by lead sulfate is determined by GB / T16913.3-1997 Dust Physical Properties Test Method Part 3: Determi...

Embodiment 3

[0047] Weigh 3.3096 g of analytically pure lead nitrate, add it into 100 mL of deionized water, and stir until completely dissolved to obtain a lead nitrate solution. Add 2.0g of capacitive activated carbon into the lead nitrate solution, stir well until the activated carbon is completely soaked and evenly dispersed in the lead nitrate solution, then add 2.91g of sulfuric acid with a density of 1.245g / mL (25°C) dropwise while stirring, Stirring was continued for 10 min to complete the reaction. After filtration and separation, the obtained composite material was dried at 100° C. for 2 hours to remove moisture therein. Finally, the dried product was treated at 210° C. for 2 h under the protection of nitrogen to remove the nitrate groups therein to obtain a lead sulfate-modified activated carbon composite material with a lead sulfate content of 60%. The bulk density of activated carbon modified by lead sulfate is determined by GB / T 16913.3-1997 Dust Physical Properties Test Met...

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Abstract

The invention relates to a preparation method for a composite negative electrode of a lead-carbon battery, and the composite negative electrode and application thereof. The preparation method comprises the following steps: producing lead sulfate in porous carbon in situ so as to improve the bulk density of a carbon material and reduce the density difference between the carbon material and lead powder; and then uniformly mixing modified activated carbon, lead powder and additives by using a shearing process so as to prepare the high-performance composite negative electrode for the lead-carbon battery. The composite negative electrode for the lead-carbon battery prepared by using the method has higher charge-discharge reversibility, longer charge-discharge cycle life and higher charge acceptance than conventional lead-acid batteries, and is easy to realize large-scale production.

Description

technical field [0001] The invention belongs to the technical field of lead-carbon batteries and lead-acid batteries, and in particular relates to a preparation method of a lead-carbon battery negative electrode and its application in lead-carbon batteries. 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 the cost of energy stor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/16H01M4/14H01M10/06
CPCH01M4/14H01M4/16H01M10/06Y02E60/10
Inventor 阎景旺张华民张洪章李先锋孙海涛霍玉龙王再红高鹤
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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