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A kind of high-performance corrosion-resistant composite coating grid of lead-acid battery and preparation method thereof

A lead-acid battery and composite coating technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems that affect the speed and degree of grid corrosion, affect the cycle life of lead-acid batteries, and cannot support active materials, etc., to achieve Extends battery life, contributes to long life and high mechanical strength

Active Publication Date: 2018-11-09
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, lead-acid batteries also have the problem of low cycle life. According to incomplete statistics, the end-of-life problem caused by grid corrosion accounts for more than 20%.
[0003] The lead-acid battery grid is a lead-based alloy grid. Although it has certain corrosion resistance and oxidation-reduction resistance during use, with the long-term use of the lead-acid battery, the positive grid will , has been in a high potential state, the positive grid is gradually oxidized, resulting in a corrosion layer, when the grid is corroded to the point where it cannot support the active material, or cannot quickly export and import electricity, the life of the lead-acid battery is over.
[0004] In addition, the impurity composition of the lead-acid battery grid, the pores or burrs when casting the grid, the acid density of the battery, and the actual use of the lead-acid battery will all affect the speed and degree of grid corrosion, thereby affecting the lead-acid battery. cycle life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a high-performance corrosion-resistant composite coating grid of a lead-acid battery, the preparation method comprising the following steps: combining poly-3,4-ethylenedioxythiophene, graphene oxide, iridium acetylacetonate and polystyrene sulfonate The mixture obtained after mixing the acid salt was subjected to high-pressure dispersion treatment with a high-pressure dispersion equipment at a pressure of 21,000 PSI, and was treated for 3 times; then mixed with pure water and added to a ball mill tank for ball milling for 1 hour, the solid-liquid ratio of the mixture to pure water was 1g: 20mL; Prepare a high molecular polymer aqueous solution, immerse the lead-acid battery grid in the high molecular polymer aqueous solution for 1-4 minutes, take it out and dry it at 60°C to obtain a high-performance corrosion-resistant composite coating grid for the lead-acid battery.

[0021] Wherein, the mass ratio of poly(3,4-ethylenedioxythiophene), graphene o...

Embodiment 2

[0023] A method for preparing a high-performance corrosion-resistant composite coating grid of a lead-acid battery, the preparation method comprising the following steps: combining poly-3,4-ethylenedioxythiophene, graphene oxide, iridium acetylacetonate and polystyrene sulfonate The mixture obtained after mixing the acid salt was subjected to high-pressure dispersion treatment with a high-pressure dispersion equipment at a pressure of 22000PSI, and was treated 4 times; then mixed with pure water and added to a ball mill tank for ball milling for 2 hours, the ratio of the mixture to the pure water was 1g: 23mL; Prepare a high molecular polymer aqueous solution, immerse the lead-acid battery grid in the high molecular polymer aqueous solution for 1-4min, take it out and dry it at 75°C to obtain a high-performance corrosion-resistant composite coating grid for the lead-acid battery.

[0024] Wherein, the mass ratio of poly(3,4-ethylenedioxythiophene), graphene oxide, iridium acety...

Embodiment 3

[0026] A method for preparing a high-performance corrosion-resistant composite coating grid of a lead-acid battery, the preparation method comprising the following steps: combining poly-3,4-ethylenedioxythiophene, graphene oxide, iridium acetylacetonate and polystyrene sulfonate The mixture obtained after mixing the acid salt was subjected to high-pressure dispersion treatment at a pressure of 25,000 PSI with a high-pressure dispersing equipment, and was treated for 5 times; then mixed with pure water and added to a ball mill tank for ball milling for 5 hours, the solid-liquid ratio of the mixture to pure water was 1g: 25mL; Prepare a high molecular polymer aqueous solution, immerse the lead-acid battery grid in the high molecular polymer aqueous solution for 1-4 minutes, take it out and dry it at 95°C to obtain a high-performance corrosion-resistant composite coating grid for the lead-acid battery.

[0027] Wherein, the mass ratio of poly(3,4-ethylenedioxythiophene), graphene ...

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Abstract

The invention belongs to the technical field of lead-acid battery and provides a high-performance anti-corrosion compound coating grid of a lead-acid battery and a preparation method thereof. The preparation method comprises the following steps of: coating a macromolecule conducting layer on the surface of a lead-acid battery grid; mixing 3,4-ethylenedioxythiophene, graphene oxide and polystyrene sulfonate, and then mixing with pure water and ball-milling, and preparing into a polymer aqueous solution; soaking the grid in the polymer aqueous solution and drying, thereby preparing into a compound coating grid. The 3,4-ethylenedioxythiophene polystyrolsulfon acid material has the characteristics of high conductivity, high mechanical strength and high anti-corrosion stability; when the compound coating grid serves as the lead-acid battery grid coating, the function of transmitting electrons is achieved, the grid can be protected and the grid is prevented from a corrosion phenomenon in the charge-discharge cycle process of the lead-acid battery; the graphene oxide is utilized to enhance the electrical conductivity and dispersity of the coating, so that the problem of ending of the service life of the battery resulted from the grid corrosion of the lead-acid battery is solved.

Description

technical field [0001] The invention belongs to the technical field of lead-acid storage batteries, and relates to a high-performance corrosion-resistant composite coating grid of a lead-acid storage battery and a manufacturing method of the composite coating grid. 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 the problem of low cycle life. According to incomplete statistics, the end-of-life problem caused by grid corrosion accounts for more than 20%. [0003] The lead-acid battery grid is a lead-based alloy grid. Although it has certain corrosion resistance and oxidation-reduction resistance during use, with the long-term use of the lead-acid battery, the positive grid will , has been in a high potential...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/68H01M4/72H01M4/73H01M4/82
CPCH01M4/66H01M4/667H01M4/68H01M4/72H01M4/73H01M4/82Y02E60/10
Inventor 李伟伟张芬萍段延延张绍辉马永泉
Owner CHAOWEI POWER CO LTD
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