Positive aluminum foil conductive agent for lithium ion battery and preparation method of positive aluminum foil conductive agent

A lithium-ion battery and conductive agent technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor current collector adhesion, poor processing performance, low electrical conductivity, etc., achieve good chemical stability, improve The effect of high adhesion and charge-discharge capacity

Active Publication Date: 2015-04-22
GUANGDONG DONGGUAN TEAMRUN ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the outstanding problems of low electrical conductivity, poor processability, poor adhesion to current collectors, and easy material loss during coating, processing and circulation of lithium-ion battery cathode materials, the first purpose of the present invention is to Provide a conductive agent for positive electrode aluminum foil of lithium-ion batteries with good electrical conductivity, good adhesion, and good solvent tolerance

Method used

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  • Positive aluminum foil conductive agent for lithium ion battery and preparation method of positive aluminum foil conductive agent
  • Positive aluminum foil conductive agent for lithium ion battery and preparation method of positive aluminum foil conductive agent
  • Positive aluminum foil conductive agent for lithium ion battery and preparation method of positive aluminum foil conductive agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Lithium-ion battery positive electrode aluminum foil conductive agent is prepared from the following raw materials by weight percentage: graphite 16.0%, conductive carbon black 5.0%, modified water-based epoxy resin 5.0%, butadiene styrene polymer 23.0%, carboxylate Sodium methylcellulose 0.5%, sodium polyacrylate 0.3%, peach gum 2.6%, 2-amino-2-methyl-1-propanol 0.3%, polyoxyethylene sorbitan monolaurate 0.3%, sub Sodium methyl bis-naphthalene sulfonate 0.6%, polyvinylpyrrolidone 0.3%, ammonia water 5.0%, and deionized water in the balance.

[0034] The preparation method of lithium-ion battery positive electrode aluminum foil conductive agent is characterized in that, comprises the steps:

[0035] 1) Add graphite, sodium carboxymethyl cellulose, peach gum, and ammonia water in sequence according to the formula ratio, and stir until uniform with a mixer to obtain the first graphite slurry; the stirring time is 1-3 hours.

[0036] 2) Grinding the first graphite slurry ...

Embodiment 2

[0042] The characteristics of this embodiment are: lithium-ion battery positive electrode aluminum foil conductive agent is prepared from the following raw materials by weight percentage: graphite 20.0%, conductive carbon black 3.5%, modified water-based epoxy resin 10.0%, butadiene benzene Ethylene polymer 18.0%, sodium carboxymethylcellulose 1.3%, sodium polyacrylate 0.08%, peach gum 6.0%, 2-amino-2-methyl-1-propanol 0.65%, polyoxyethylene sorbitan mono 0.3% of laurate, 0.6% of sodium methylene bis-naphthalene sulfonate, 0.6% of polyvinylpyrrolidone, 3.0% of ammonia water, and the balance is deionized water.

[0043] The preparation method of the lithium ion battery positive electrode aluminum foil conductive agent described in this embodiment is the same as that in Embodiment 1.

Embodiment 3

[0045] The characteristics of this embodiment are: lithium-ion battery positive electrode aluminum foil conductive agent is prepared from the following raw materials by weight percentage: graphite 15.0%, conductive carbon black 3.0%, modified water-based epoxy resin 5.0%, butadiene benzene Ethylene polymer 11.0%, sodium carboxymethylcellulose 0.1%, sodium polyacrylate 0.05%, peach gum 2.0%, 2-amino-2-methyl-1-propanol 0.3%, polyoxyethylene sorbitan mono 0.05% of laurate, 0.2% of polyvinylpyrrolidone, 0.3% of sodium methylene bis-naphthalene sulfonate, 2.0% of ammonia water, and the balance is deionized water.

[0046] The preparation method of the lithium ion battery positive electrode aluminum foil conductive agent described in this embodiment is the same as that in Embodiment 1.

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Abstract

The invention discloses a positive aluminum foil conductive agent for a lithium ion battery and a preparation method of the positive aluminum foil conductive agent. The anode aluminum foil conductive agent is prepared from the following raw materials in percentage by weight: 15.0-22.0 percent of graphite, 3.0-6.0 percent of conductive carbon black, 5.0-10.0 percent of modified water-borne epoxy resins, 11.0-25.0 percent of butadiene styrene polymer, 0.1-1.5 percent of sodium carboxymethylcellulose, 0.05-0.5 percent of sodium polyacrylate, 2.0-6.5 percent of peach gum, 0.3-0.8 percent of 2-amino-2-methyl-1-propyl alcohol, 0.05-0.5 percent of polyoxyethylene sorbitan monolaurate, 0.2-0.7 percent of polyvinylpyrrolidone, 0.3-1.0 percent of sodium methylene bis-naphthalene sulfonate, 2.0-6.0 percent of ammonium hydroxide and the balance of deionized water. The positive anode aluminum foil conductive agent for the lithium ion battery is high in conductivity, high in adhesion and high in solvent tolerance.

Description

technical field [0001] The invention relates to a conductive agent, in particular to a conductive agent for positive electrode aluminum foil of a lithium ion battery and a preparation method thereof. Background technique [0002] In the battery industry, there are many types. Lithium-ion batteries have been widely used in aerospace, military, and electric vehicles due to their advantages such as high energy density, high output voltage, small self-discharge, excellent cycle performance, wide operating temperature range, and environmental protection. , electric tools and electronic products and other fields. It is a representative of modern high-performance batteries. In order to ensure that the electrode has good charge and discharge performance, it is often necessary to use a conductive agent. A certain amount of conductive material is usually added during the production of the pole piece to collect micro-current between the active material and between the active material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCH01M4/626Y02E60/10
Inventor 纪玉信许俊伟张树鸿
Owner GUANGDONG DONGGUAN TEAMRUN ELECTRONICS MATERIAL
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