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Three-dimensional pore space electrode for accumulator

A three-dimensional pore, battery technology, applied in the direction of active material electrodes, electrode carriers/current collectors, etc., can solve the problems of not effectively improving the micropore surface area, increase, etc., to achieve good mechanical and electrical performance continuity, high discharge rate, weight reduction effect

Inactive Publication Date: 2009-05-27
戴志强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the change of the formula of this kind of material is beneficial to the diffusion of the electrolyte, it does not effectively improve the increase of the surface area of ​​the micropores.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Mechanically mix polytetrafluoroethylene, zeolite and sodium metasilicate at a ratio of 13:6:1, put it into a mold and heat press at 100-300°C for 2-5 minutes to release the mold; put it into a heating furnace at 100- Sintered at 300°C to form a 590-74um microporous material to form a three-dimensional electrode matrix; the lead is embedded in the three-dimensional electrode matrix by vibration. Particles are firmly embedded. Using the chemical plating method, the three-dimensional matrix material is attached to the conductive layer, the diameter of the mesh is kept at 590-74 microns, and the mosaic particles are integrated with the mesh matrix to form a three-dimensional body. Put the three-dimensional body into an oxygen furnace and fill it with pure oxygen for 15-60 minutes, so that the inner wall of the three-dimensional hole is oxidized to form a layer of electrochemically active material; the active material is coated on the battery plate by paste, The ...

Embodiment 2

[0028]Example 2: Ultra-high molecular weight polyethylene (2 million molecular weight), zeolite and sodium metasilicate are mechanically mixed in a ratio of 13:6:1, put into a mold, and hot-pressed at 100-300°C for 2-5 minutes to release the mold; The heating furnace is fired at 100-300°C to form a 590-74um microporous material to form a three-dimensional electrode matrix; lead is embedded in the three-dimensional electrode matrix by mechanical coating, and the non-metallic material of the three-dimensional network matrix accounts for 42% of the volume of the active material. Then it is squeezed by the roller to achieve the firm inlay of the particles. Using the chemical plating method, the three-dimensional matrix material is attached to the conductive layer, the mesh diameter is kept at 590-74 microns, and the inlaid particles are integrated with the mesh matrix to form a three-dimensional body. Put the three-dimensional body into an oxygen furnace and fill it with pure oxyg...

Embodiment 3

[0029] Example 3: Polyethylene, zeolite, activated carbon and polytetrafluoroethylene emulsion are mechanically mixed in a ratio of 12:3:3:1, put into a mold and hot pressed for 2 to 5 minutes to release the mold; The 74um microporous material forms a three-dimensional electrode matrix; the lead is embedded in the three-dimensional electrode matrix by mechanical coating, and the non-metallic material of the three-dimensional network matrix accounts for 50% of the volume of the active material. Then it is squeezed by the roller to achieve the firm inlay of the particles. Following preparation method is with embodiment 1.

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Abstract

The invention relates to a three-dimensional pore electrode for storage batteries, which is characterized in that an electrode pole plate consists of a three-dimensional net matrix formed in a way that the adding amount of non-metallic materials accounts for 10 to 90 percent of the volume of active matter; and the active matter is inlaid in meshes, so as to form a porous electrode matrix with a three-dimensional pore structure. The preparation of the electrode comprises the following steps: framework material, microporous material and adhesive material are mechanically mixed in the mixture ratio, put into mold, hot-pressed for 2 to 5 minutes at a temperature between 100 and 300 DEG C, knocked out, put into a heating furnace, fired to be 590 to 74 microns of microporous material as the three-dimensional net matrix on standby; lead or lead dioxide is inlaid into the meshes of the three-dimensional net matrix through a mechanical coating-filling mode; and a conducting layer is attached to three-dimensional matrix material by a chemical plating method, put into an oxygen furnace, supplied with oxygen and treated for 15 to 60 minutes. The three-dimensional pore electrode has the advantages that the utilization ratio of the active matter is greatly improved by increasing the surface area of micropores, and a storage battery made of the electrode has high specific energy, high power, long service life, high discharge rate and quick charge capability.

Description

technical field [0001] The invention belongs to the technical field of secondary power supply, and relates to the constituent materials of positive and negative electrodes (plates) of accumulators, in particular to the constituent materials of three-dimensional porous electrodes in accumulators, and a method for manufacturing such three-dimensional porous electrodes. Background technique [0002] Batteries, also known as secondary batteries, are electrical energy-chemical energy-electrical energy storage and conversion devices. There are many types, including lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, nickel-zinc batteries, lithium polymer batteries, and supercapacitors. After more than 100 years of development and improvement, lead-acid batteries have become the most widely used secondary batteries in the world and occupy a dominant position in the field of secondary batteries. [0003] There are two industrialized...

Claims

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Application Information

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IPC IPC(8): H01M4/02H01M4/66
CPCY02E60/12Y02E60/10
Inventor 戴志强
Owner 戴志强
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