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Preparation method and application of graphene coated lead-lead oxide composite material

A technology of graphene coating and lead oxide, which is applied in the direction of lead-acid batteries, electrical components, battery electrodes, etc., can solve the problems of low utilization efficiency and uneven material mixing, so as to improve utilization efficiency and redox efficiency , The effect that the production process conditions are easy to control

Active Publication Date: 2018-10-30
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Preparation method and application of graphene coated lead-lead oxide composite material

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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 storage batteries, in particular to a preparation method of a graphene coated lead-lead oxide composite material. The preparation method comprises the following steps: (1) weighing oxidized graphene, a conjugated redox polymer and a lead-lead oxide for standby use in proportion respectively; (2) carrying out ball-milling on the lead-lead oxide; (3) blowing the oxidized graphene and the conjugated redox polymer into the lead-lead oxide which is performing ball-milling inside a ball-milling lead powder machine through an air blowing port,and reacting under an ultrasonic wave stirring condition at the temperature of 150 to 180 DEG C to generate the graphene coated lead-lead oxide composite material. The graphene coated lead-lead oxidecomposite material has reversible redox nodes and stably stored electrons, the redox efficiency is improved, and the problem of early capacity fading is effectively solved; the agglomeration of graphene is prevented, and the dispersibility of the graphene is improved; and the conjugated polymer is compounded with the graphene, so that other impurities, such as metal oxides, influencing battery performance are avoided from being introduced.

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 Applications(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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