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Lithium cobaltate battery anode/cathode paste production and formation charging method

A lithium cobalt oxide, positive and negative electrode technology, which is applied in the field of positive and negative electrode slurry preparation and chemical formation charging of lithium cobalt oxide batteries, can solve the problems of poor corrosion resistance of lithium ion battery collectors, ductility of positive aluminum foils and Problems such as defects in processing performance and unsatisfactory battery specific capacity, etc., to achieve the effects of improving the charge acceptance of formation, improving formation efficiency, and long life

Inactive Publication Date: 2019-07-09
程艳青
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, the corrosion resistance of the collector electrode of lithium-ion batteries is not strong, and the ductility and processability of the positive aluminum foil are defective.
The formation charging efficiency is low, the specific capacity of the battery is not ideal, and the formation is not complete, which leads to high specific capacity and short life of the product at one time

Method used

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Embodiment

[0047] A method for processing positive and negative electrode slurry for a lithium cobalt oxide battery, comprising the following processing steps:

[0048] A. Positive electrode formula: collector aluminum foil, i.e. silver content 0.03~0.08%, tin content 0.6~1.5%, thickness 15~20μm, lithium cobaltate LiCoO2 88~95 parts, conductive agent, nano colloidal graphite 1~4 parts, nano carbon Nanotube 1~4 parts, binder PVDF, 2~6 parts, NMP: 120-140 parts;

[0049] B. Positive electrode mixture

[0050] 1) Dehydration pretreatment of raw materials (1) Lithium cobaltate: bake at 120~150°C under normal pressure for about 2 hours; (2) Conductive agent: bake at 200°C under normal pressure for about 2 hours; (3) Adhesive : Generally, it is baked at 120-140℃ under normal pressure for about 2 hours;

[0051] 2) Material ball milling

[0052] LiCoO 2 , Pour the conductive agent into the material barrel, and add grinding balls (dry material: grinding ball = 1:1) for ball milling. The spee...

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Abstract

The invention relates to a lithium cobaltate battery anode / cathode paste production and formation charging method. The method comprises the steps of A, anode formula preparation; B, anode material mixing; and C, cathode material mixing, wherein the step B comprises the steps of (1) dehydration pretreatment of raw materials; (2) material ball-milling; and (3) operation. Through the method, conductivity is improved, and the corrosion resistance of a collector is improved; by adding tin (Sn) into anode aluminum foil, the ductility of the aluminum foil can be improved, and the processing performance of the aluminum foil is improved; since nano-aquadag and a carbon nano tube are adopted as anode conductive agents, the conductivity is improved; according to formation charging, reverse charging is performed first, it is convenient for an anode to form a conductive network, so that formation charging in a later period is performed efficiently, and the specific capacity of a battery is increased; through two times of discharge after a constant current and a constant voltage in sequence, thorough formation is guaranteed, and active substances are activated; dormant standing is performed twice between the two times of discharge, so that depolarization is guaranteed, the formation charging acceptance ability can be improved beneficially, electricity is saved, formation efficiency is improved, and meanwhile a cooling function is achieved; and a product is high in specific capacity and long in life.

Description

technical field [0001] The invention relates to a processing method of a lithium battery, in particular to a method for preparing a positive and negative electrode slurry of a lithium cobalt oxide battery and forming and charging it. Background technique [0002] At present, the corrosion resistance of the collector electrode of lithium-ion batteries is not strong, and the ductility and processability of the positive electrode aluminum foil are defective. The formation charging efficiency is low, the specific capacity of the battery is not ideal, and the formation is not complete, which leads to high specific capacity and short life of the product. Contents of the invention [0003] The object of the present invention is to solve the above problems and provide a method for making the positive and negative electrode slurry of a lithium cobalt oxide battery and forming and charging it. [0004] The technical scheme adopted in the present invention is: [0005] A method for...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M4/62H01M10/052
CPCH01M4/625H01M4/661H01M4/666H01M10/052Y02E60/10
Inventor 程艳青
Owner 程艳青
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