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Three-dimensional electrode for accummulater and preparing mehtod

A storage battery and electrode technology, which is applied in the field of three-dimensional porous electrode materials to manufacture such three-dimensional porous electrodes, can solve the problems of increasing and not effectively improving the surface area of ​​micropores, and achieve high discharge rate, good continuity of mechanical and electrical properties , the effect of shortening the initial capacity

Inactive Publication Date: 2009-03-18
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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  • Three-dimensional electrode for accummulater and preparing mehtod

Examples

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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 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 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 oxygen for 15 to 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 th...

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 combined 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...

Embodiment 3

[0029] Example 3: Mechanically mix polyethylene, zeolite, activated carbon and polytetrafluoroethylene emulsion at a ratio of 12:3:3:1, put them into a mold and heat press for 2 to 5 minutes to demould; 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-dimension pore electrode for an accumulator and the preparation thereof. The structure of an electrode plate is that a three-dimension network basal body is formed through active substances which account for 10-90% volume in non-metal material, active substances are embedded in meshes to form a porous electrode basal body with three-dimension pore structure. The preparation of the electrode comprises mechanically mixing skeleton, pores and bonding material according to the proportion, then filling into a mould to conduct with autoclaving with 100-300 DEG C, then demoulding after 2-5 minutes, adding in a heating furnace to calcine into poromerics with 590-74 micron reserving as the three-dimension network basal body, embedding lead or lead dioxide into the meshes of the three-dimension network basal body through the mechanical coating way, facilitating the three-dimension basal body material to be attached with a conductive layer through the chemical plating, and then communicating oxygen for 15-60 minutes in an oxygen furnace. The invention increases active substance utilization in a maximum degree through increasing the surface of the pores, and the accumulator which is produced has high specific energy, high power and long service life, and has high discharge rate and fast 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): H01M4/02H01M4/66H01M4/04
CPCY02E60/10
Inventor 戴志强
Owner 戴志强
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