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Method for improving anode aluminum foil current collector performance

A technology of current collector and aluminum foil, applied in electrode collector coating, electrode carrier/current collector, electrode manufacturing, etc., can solve the problems of low bonding strength and poor bonding application performance.

Inactive Publication Date: 2019-02-26
遵义源创生产力促进中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, due to inappropriate surface treatment of the aluminum foil to be bonded, the adhesive strength is not high in the process of bonding the aluminum foil with an adhesive, resulting in poor bonding application performance.

Method used

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  • Method for improving anode aluminum foil current collector performance

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Experimental program
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Effect test

Embodiment 1

[0021] A method for improving the performance of a positive electrode aluminum foil current collector, comprising the following steps:

[0022] (1) Soak the aluminum foil in a pretreatment solution at 40°C for 10s;

[0023] (2) Put the aluminum foil treated in step (1) in a sodium fluoroborate solution, treat it at 80° C. for 30 seconds, rinse it with clean water, and dry it in the air.

[0024] Described pretreatment liquid is made up of sodium sulfate 2g / L, potassium acetate 1g / L, octylphenol polyoxyethylene ether 5g / L and water;

[0025] Described sodium fluoroborate solution is made up of sodium dihydrogen phosphate 4g / L, ammonium fluoride 1g / L, zinc acetate 3g / L, sodium fluoroborate 14g / L and water.

Embodiment 2

[0027] A method for improving the performance of a positive electrode aluminum foil current collector, comprising the following steps:

[0028] (1) Soak the aluminum foil in the pretreatment solution at 50°C for 20s;

[0029] (2) Put the aluminum foil treated in step (1) in a sodium fluoroborate solution, treat it at 100°C for 50 seconds, rinse it with clean water, and dry it in the air.

[0030] Described pretreatment liquid is made up of sodium sulfate 8g / L, potassium acetate 3g / L, octylphenol polyoxyethylene ether 7g / L and water;

[0031] The sodium fluoroborate solution is composed of potassium dihydrogen phosphate and calcium dihydrogen phosphate mixed 11g / L, ammonium fluoride 5g / L, potassium acetate 8g / L, sodium fluoroborate 17g / L and water.

Embodiment 3

[0033] A method for improving the performance of a positive electrode aluminum foil current collector, comprising the following steps:

[0034] (1) Soak the aluminum foil in a pretreatment solution at 45°C for 15s;

[0035] (2) Put the aluminum foil treated in step (1) in a sodium fluoroborate solution, treat it at 90°C for 40 seconds, rinse it with clean water, and dry it in the air.

[0036] Described pretreatment liquid is made up of sodium sulfate 6g / L, potassium acetate 2g / L, octylphenol polyoxyethylene ether 6g / L and water;

[0037] Described sodium fluoroborate solution is mixed 8g / L by the mass ratios such as calcium dihydrogen phosphate, potassium dihydrogen phosphate, sodium dihydrogen phosphate, ammonium fluoride 3g / L, zinc acetate and potassium acetate etc. quality mixes 5g / L, Sodium fluoroborate 16g / L and water.

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Abstract

The invention relates to the technical field of anode materials of batteries, and particularly relates to a method for improving an anode aluminum foil current collector performance. The method is characterized in that the surface of an aluminum foil is preprocessed with a preprocessing solution, so that stains on the surface of the aluminum foil can be cleaned, and a metal substrate is completelyexposed; moreover, some acid group anions can be loaded onto the surface of the metal substrate, so that the metal substrate without being washed can be processed in a sodium fluoborate solution, andthus the formation of a microporous film on the surface of the metal substrate can be facilitated; the toughness of the aluminum foil is improved, and the aluminum foil can be closely combined with an adhering agent, the adhering intensity is improved, and the peeling strength is improved.

Description

technical field [0001] The invention relates to the technical field of battery positive electrode materials, in particular to a method for improving the performance of a positive electrode aluminum foil current collector. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, high energy density, no memory effect, long cycle life, and low self-discharge, and are widely used. The performance of the cathode material will determine the performance of the lithium-ion battery. At present, lithium-ion batteries are mainly composed of organic electrolyte, separator, positive electrode, negative electrode, current collector and other components. Due to the weak conductivity of the liquid organic electrolyte used in lithium-ion batteries, in order to realize the high-current charge and discharge performance of lithium-ion batteries, the positive electrode materials and negative electrode materials of lithium-ion batteries are generally processed int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/62H01M4/80H01M10/0525
CPCH01M4/04H01M4/0404H01M4/623H01M4/80H01M10/0525Y02E60/10
Inventor 许仁贵刘文涛刘萍萍
Owner 遵义源创生产力促进中心有限公司
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