A kind of preparation method of graphene-coated lead-lead oxide composite material and application thereof

A graphene-coated, lead oxide technology, applied in lead-acid batteries, structural parts, electrical components, etc., can solve problems such as low utilization efficiency and uneven mixing of materials, and achieve improved utilization efficiency and redox efficiency. , to address early effects

Active Publication Date: 2021-01-26
CHAOWEI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of uneven mixing and low utilization efficiency of directly adding graphene materials in lead-acid storage batteries in the prior art, the present invention provides a graphite with reversible redox nodes and stable storage of electrons (capacitance) Preparation method of ene-coated lead-lead oxide composites to improve redox efficiency and avoid early capacity fading

Method used

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  • A kind of preparation method of graphene-coated lead-lead oxide composite material and application thereof

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Effect test

Embodiment 1

[0038] (1) According to the mass ratio of 0.5:2.5:62, graphene oxide, conjugated redox polymer and lead-lead oxide were weighed respectively for use, and graphene oxide was pretreated: soak graphene oxide in analytically pure In sulfuric acid, stirred at 35°C for 5h, the liquid-solid ratio of sulfuric acid to graphene oxide was 40mL / g;

[0039] (2) lead-lead oxide is carried out ball milling in ball milling lead powder machine;

[0040] (3) Mix the pretreated graphene oxide and conjugated redox polymer into the lead-lead oxide being ball-milled in the ball-milling lead powder machine through the tuyere, and under the temperature of 150°C, 30KHz frequency ultrasonic stirring conditions , the reaction generates graphene-coated lead-lead oxide composites; wherein, the flow rate of graphene oxide blowing is controlled at 45m 2 / min, the graphene oxide content per unit volume is 5g / m 3 ;

[0041] (4) The prepared graphene layer-coated lead-lead oxide composite material is mixed in...

Embodiment 2

[0043] (1) According to the mass ratio of 1.2:3.8:105, respectively weigh graphene oxide, conjugated redox polymer and lead-lead oxide for use, and pretreat graphene oxide: soak graphene oxide in analytically pure In sulfuric acid, stirred at a temperature of 52°C for 2h, the liquid-solid ratio of the sulfuric acid to graphene oxide was 50mL / g;

[0044] (2) lead-lead oxide is carried out ball milling in ball milling lead powder machine;

[0045] (3) Mix the pretreated graphene oxide and conjugated redox polymer into the lead-lead oxide being ball-milled in the ball-milling lead powder machine through the tuyere, under the temperature condition of 180 ℃, 10KHz frequency ultrasonic stirring condition , the reaction generates graphene-coated lead-lead oxide composite materials; wherein, the flow rate of graphene oxide blowing is controlled at 80m 2 / min, the graphene oxide content per unit volume is 18g / m 3 ;

[0046] (4) The prepared graphene layer-coated lead-lead oxide comp...

Embodiment 3

[0048] (1) According to the mass ratio of 1:3:80, graphene oxide, conjugated redox polymer and lead-lead oxide were weighed respectively for use, and graphene oxide was pretreated: immerse graphene oxide in analytically pure In sulfuric acid, stirred at 45°C for 3h, the liquid-solid ratio of the sulfuric acid to graphene oxide was 45mL / g;

[0049] (2) lead-lead oxide is carried out ball milling in ball milling lead powder machine;

[0050] (3) Mix the pretreated graphene oxide and conjugated redox polymer into the lead-lead oxide being ball-milled in the ball-milling lead powder machine through the tuyere, and under the temperature of 170°C, 20KHz frequency ultrasonic stirring conditions , the reaction generates graphene-coated lead-lead oxide composite materials; wherein, the flow rate of graphene oxide blowing is controlled at 70m 2 / min, the graphene oxide content per unit volume is 10g / m 3 ;

[0051] (4) The prepared graphene layer-coated lead-lead oxide composite mater...

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Abstract

The invention relates to the technical field of lead-acid batteries, in particular to a method for preparing a graphene-coated lead-lead oxide composite material, comprising the following steps: (1) weighing graphene oxide according to the proportioning ratio, and performing conjugate redox polymerization (2) the lead-lead oxide is ball milled; (3) the graphene oxide and the conjugated redox polymer are blown into the ball milling lead powder machine through the air outlet and are being ball milled In the lead-lead oxide, under the temperature condition of 150-180 ℃, under the condition of ultrasonic stirring, the reaction produces graphene-coated lead-lead oxide composite material. The graphene-coated lead-lead oxide composite material of the present invention has reversible redox nodes and stable storage of electrons, improves redox efficiency, and effectively solves the problem of early capacity fading; prevents the agglomeration of graphene and improves its dispersion; The polymer is compounded with graphene to avoid the introduction of metal oxides and other impurities that affect battery performance.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a preparation method and application of a graphene-coated lead-lead oxide composite material. Background technique [0002] Lead-acid batteries have been invented for more than 150 years. Because of their high safety, stable performance, low manufacturing cost, and high recycling value, they are widely used in the national economy and people's lives. middle. But at the same time, lead-acid batteries also have a series of problems such as low cycle life, low energy density utilization rate, and incomplete conversion of active materials leading to capacity attenuation, which has become an important factor restricting lead-acid batteries from occupying a larger market. [0003] By adding a certain amount of characteristic carbon materials to the negative electrode of the lead-acid battery, the high conductivity and capacitance characteristics of the carbon materials are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/57H01M4/62H01M10/06
CPCH01M4/366H01M4/57H01M4/62H01M10/06Y02E60/10
Inventor 吴亮王富
Owner CHAOWEI POWER CO LTD
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