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A high-capacity and long-life lead-carbon battery negative electrode and its manufacturing method

A technology of lead-carbon battery and manufacturing method, which is applied in the direction of battery electrodes, circuits, electrical components, etc., which can solve the problems of reduced maintenance-free performance, water loss of lead-acid batteries, and shortened service life, achieving a significant shunt effect and reducing water loss , the effect of low production cost

Active Publication Date: 2020-10-02
重庆锦添翼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

However, in this patent, graphene still has some disadvantages as a negative electrode additive for lead-carbon batteries. The main disadvantages are: the hydrogen evolution overpotential of graphene is low, and the addition of graphene will aggravate the hydrogen evolution problem of the negative electrode, resulting in failure of the lead-acid battery. Water is serious, the maintenance-free performance is reduced, and the service life is greatly shortened

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for manufacturing a high-capacity and long-life lead-carbon battery negative electrode, the specific steps are as follows:

[0038] 1. The components and mass ratio of the negative electrode of a high-capacity and long-life lead-carbon battery are: lead powder 81%, polyaniline nanowire array@graphene 0.1%, barium sulfate 0.7%, sulfuric acid 6%, humic acid 0.2%, short fiber 1%, lignin 1% and water 10%;

[0039] Wherein: the degree of oxidation of the lead powder is 75%; the density of the sulfuric acid is 1.38g / cm 3 ; The short fiber is nylon.

[0040] 2. Pour the above-mentioned lead powder, barium sulfate, humic acid, short fiber, and lignin into a beaker according to the mass ratio described in step 1 and stir for 5 minutes to obtain mixture A;

[0041] 3. Disperse polyaniline nanowire array@graphene in deionized water according to the mass ratio described in step 1, and stir for 10 minutes to obtain mixture B;

[0042] 4. Add the above mixture A to the mi...

Embodiment 2

[0059] A method for manufacturing a high-capacity and long-life lead-carbon battery negative electrode, the specific steps are as follows:

[0060] 1. The components and mass ratio of the negative electrode of a high-capacity and long-life lead-carbon battery are: 77% of lead powder, 0.4% of polyaniline nanowire array@graphene, 0.4% of barium sulfate, 8% of sulfuric acid, humic acid 0.9%, short fiber 1.5%, lignin 0.8% and water 11%;

[0061] Wherein: the degree of oxidation of the lead powder is 72%; the density of the sulfuric acid is 1.18g / cm 3 ; The short fiber is polyester.

[0062] 2. Pour the above-mentioned lead powder, barium sulfate, humic acid, short fiber, and lignin into a beaker according to the mass ratio described in step 1 and stir for 10 minutes to obtain mixture A;

[0063] 3. Disperse polyaniline nanowire array@graphene in deionized water according to the mass ratio described in step 1, and stir for 5 minutes to obtain mixture B;

[0064] 4. Add the above...

Embodiment 3

[0081] A method for manufacturing a high-capacity and long-life lead-carbon battery negative electrode, the specific steps are as follows:

[0082] 1. The components and mass ratio of the negative electrode of a high-capacity and long-life lead-carbon battery are: 82% lead powder, 1% polyaniline nanowire array@graphene, 0.6% barium sulfate, 5.3% sulfuric acid, humic acid 0.9%, short fiber 0.8%, lignin 0.4% and water 9%;

[0083] Wherein: the degree of oxidation of the lead powder is 76%; the density of the sulfuric acid is 1.24g / cm 3 ; The short fiber is acrylic fiber.

[0084] 2. Pour the above-mentioned lead powder, barium sulfate, humic acid, short fiber and lignin into the beaker according to the mass ratio described in step 1 and stir for 8 minutes to obtain the mixture A;

[0085] 3. Disperse polyaniline nanowire array@graphene in deionized water according to the mass ratio described in step 1, and stir for 6 minutes to obtain mixture B;

[0086] 4. Add the above mixt...

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Abstract

The invention provides a high-capacity long-service-life lead-carbon battery negative electrode and a manufacturing method, and relates to a preparation method for a polyaniline / graphene composite material, and the composite material is applied to the lead-carbon battery negative electrode; the preparation method comprises the steps of performing ultrasonic processing on a graphene acid solution to obtain a graphene dispersion liquid; and then adding aniline into the graphene dispersion liquid, stirring uniformly in a water bath condition and then adding an acid solution of ammonium persulfate, continuously stirring for 12-26h, and performing centrifuging and drying to obtain the polyaniline / graphene composite material. When the polyaniline / graphene composite material is used as a negative electrode additive of the lead-carbon battery, the conductivity of a negative electrode plate can be improved, sulfation of a lead negative electrode can be suppressed, and HRPSoC cycling life of the lead-carbon battery and the utilization ratio of the negative electrode active material can be obviously improved; the polyaniline / graphene composite material has the effects of shunting and buffering high current, and the charging acceptance capability of the lead-carbon battery can be remarkably improved; and the composite material is simple in process, convenient to operate, low in production cost and easy to realize large-scale production.

Description

technical field [0001] The invention relates to the technical field of lead-carbon batteries, in particular to a polyaniline / graphene composite material and its application as a lead-carbon battery negative electrode material. Background technique [0002] Lead-carbon batteries have become one of the most concerned technologies by researchers at home and abroad. Lead-carbon battery is a new type of super battery, which is a combination of lead-acid battery and super capacitor: it not only takes advantage of the advantages of super capacitor instantaneous large-capacity charging, but also takes advantage of the specific energy of lead-acid batteries, and has a very Good charge and discharge performance. However, traditional lead-acid batteries often fail due to serious sulfation of the negative electrode active material, and the cycle life is greatly reduced. Introducing polyaniline / graphene nanocomposites into the negative electrode of lead-carbon batteries can improve the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62
CPCH01M4/62H01M4/625Y02E60/10
Inventor 李新禄龙君君张艳艳吴玉洋赵奚誉粟泽龙赵昱颉王荣华
Owner 重庆锦添翼新能源科技有限公司