Preparation method of three-dimensional electrode slice based on aqueous adhesive

A water-based binder, three-dimensional electrode technology, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve the problems of high price of foamed graphite mesh, insufficient ductility, and the bonding firmness needs to be further improved. Effects of improving electron conductivity and improving discharge rate characteristics
CN104852013AActive Publication Date: 2015-08-19GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Publication Date
2015-08-19

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Abstract

The invention provides a three-dimensional electrode slice based on an aqueous adhesive and a preparation method of the three-dimensional electrode slice. The method comprises the following steps: mixing the aqueous adhesive, a conductive agent and an active substance into slurry according to a certain proportion, and coating a three-dimensional porous metal current collector with the slurry; and performing the operation of drying, rolling, slicing or further carbonization and the like to prepare the three-dimensional electrode slice for a lithium ion battery. A water-soluble organic polymer material is adopted as the adhesive, so that the advantages of low price, wide source, environmental friendliness and the like are realized. The prepared three-dimensional electrode slice has a porous three-dimensional structure. Through the three-dimensional structure, infiltration of electrolyte is facilitated; the interface compatibility between the electrolyte and the active substance is improved; and the discharge rate characteristic of the battery is improved effectively. The three-dimensional electrode slice is simple in structure, simple and convenient in preparation process, and easy to implement.
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Description

Technical field

[0001] The invention relates to a method for preparing a three-dimensional electrode pole piece, in particular to a method for preparing a three-dimensional electrode pole piece based on an aqueous binder. Background technique

[0002] With the steady growth of consumer electronics demand, the rapid development of hybrid and pure electric vehicles, and the acceleration of the construction of new energy grid-connected power stations, high-performance energy storage batteries have become one of the core technologies for vigorous development. Among them, lithium-ion batteries have great potential in the field of distributed power generation and energy storage due to their advantages of high voltage, large capacity, good cycle performance, and low pollution. With the continuous improvement of the cost performance of lithium-ion batteries, the trend of replacing traditional batteries such as lead-acid and nickel-hydrogen batteries with lithium batteries has become incr...

Claims

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