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Graphene conducting polymer lead-acid cell and preparation method thereof

A conductive polymer, lead-acid battery technology, used in lead-acid batteries, lead-acid battery construction, battery electrodes, etc., can solve the problems of lead-acid battery safety and unknown electrical properties, easy agglomeration, and poor graphene dispersion. , to achieve the effect of reducing mud formation, preventing agglomeration and improving electrical conductivity

Active Publication Date: 2016-10-05
江西力之奇新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the poor dispersion of nanoscale graphene, there is a problem of easy agglomeration
Moreover, the titanium oxide / graphene composite material will introduce impurity metals, and there are still unknown hidden dangers to the safety and electrical properties of lead-acid batteries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing a graphene conductive polymer lead-acid battery includes the following steps:

[0037] a. Dissolve polyacetylene in N-methylpyrrolidone solvent at 110°C, then add graphene to the solvent and stir. The mass ratio of the graphene to the polymer is 9:2, and the mass of the solvent is 4 times the total mass of the graphene and the polymer. The graphene is prepared by redox method; and the number of graphene layers is 1-50, and the particle size is 20nm-10um.

[0038] After the graphene powder is completely infiltrated, the water bath is ultrasonic, the temperature of the water bath is 52°C, the ultrasonic time is 1.5h; the stirring time is 2.5h, and the stirring speed is 450rpm. Then stir to obtain a graphene polymer mixture.

[0039] b. Freeze-dry the graphene polymer mixture; obtain graphene polymer powder.

[0040] c. The obtained graphene polymer powder and the positive electrode additive are mixed according to the ratio and then ball milled for 1.2 hou...

Embodiment 2

[0044] A method for preparing a graphene conductive polymer lead-acid battery includes the following steps:

[0045] a. Dissolve polythiophene in dimethyl sulfoxide solvent at 100°C, then add graphene to the solvent and stir. The mass ratio of the graphene to the polymer is 2:8, and the mass of the solvent is 3.5-times the total mass of the graphene and the polymer. The graphene is produced by a mechanical exfoliation method; and the number of graphene layers is 1-50, and the particle size is 20nm-10um.

[0046] After the graphene powder is completely infiltrated, the water bath is ultrasonicated, the temperature of the water bath is 45°C, the ultrasonic time is 3h; the stirring time is 4h, and the stirring speed is 200rpm. Then stir to obtain a graphene polymer mixture.

[0047] b. Dry the graphene polymer mixture at a temperature of 190°C to obtain graphene polymer powder.

[0048] c. The obtained graphene polymer powder and the positive electrode additive are mixed according to t...

Embodiment 3

[0052] A method for preparing a graphene conductive polymer lead-acid battery includes the following steps:

[0053] a. Dissolve polypyrrole and polyaniline in dimethylacetamide at 120°C, then add graphene to the solvent and stir. The mass ratio of the graphene to the polymer is 9:1, and the mass of the solvent is 4.5 times the total mass of the graphene and the polymer. The graphene is produced by a mechanical exfoliation method; and the number of graphene layers is 1-50, and the particle size is 20nm-10um.

[0054] After the graphene powder is completely infiltrated, the water bath is ultrasonic, the temperature of the water bath is 60°C, the ultrasonic time is 0.1h; the stirring time is 0.5h, and the stirring speed is 700rpm. Then stir to obtain a graphene polymer mixture.

[0055] b. Freeze-dry the graphene polymer mixture; obtain graphene polymer powder.

[0056] c. The obtained graphene polymer powder and the positive electrode additive are mixed according to the ratio and the...

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Abstract

The invention relates to the field of lead-acid cell and discloses a graphene conducting polymer lead-acid cell and a preparation method thereof. Each 10000 weight part of anode lead plaster of the graphene conducting polymer lead-acid cell is prepared from the following substances: 9960-9980 parts of lead powder, 15-45 parts of anode additives and 0.4-3.2 parts of graphene polymer powder; the graphene polymer powder is prepared by using a polymer, a solvent and graphene; the mass ratio of graphene to the polymer is (2:8)-(9:1); the mass of the solvent is 3.5-4.5 times of the total mass of the graphene and the polymer. The graphene conducting polymer lead-acid cell prepared according to the invention can be used for effectively increasing the electrical conductivity of anode active material, increasing the battery capacity, reducing the anode argillization phenomenon of the battery in the use process and prolonging the service life of the battery.

Description

Technical field [0001] The invention relates to the field of lead-acid batteries, in particular to a graphene conductive polymer lead-acid battery and a preparation method thereof. Background technique [0002] The conductivity of the positive electrode in lead-acid batteries is an important factor affecting the performance of the positive plate. Good electrical conductivity shortens the formation process cycle of the positive plate, reduces the sludge of the positive electrode, and improves the utilization rate of living things. [0003] Graphene, as a new type of two-dimensional material, has good electrical conductivity, thermal conductivity, mechanical properties, and low electrical resistivity, which makes it well-tested in lead-acid batteries. High-quality graphene is chemically stable at high potential and has higher oxidation resistance than other ordinary carbon materials. [0004] For example, the Chinese invention patent application number 201410304261.2 discloses a lead...

Claims

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Application Information

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IPC IPC(8): H01M4/57H01M4/62H01M10/06H01M10/12
CPCH01M4/57H01M4/62H01M4/625H01M10/06H01M10/12Y02E60/10Y02P70/50
Inventor 石沫戴贵平柯娃吴亮吴秋菊
Owner 江西力之奇新能源科技有限公司