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Plasma cleaning process for aluminum foil of lithium ion battery

A technology of plasma cleaning and lithium-ion batteries, which is applied in the field of metal aluminum, can solve the problems of needing solvents, slow decontamination speed, and non-environmental protection, and achieve the effect of increasing strength and mechanical performance indicators, ensuring mechanical properties, and improving cleaning speed

Active Publication Date: 2016-09-21
佛山金兰铝厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing technologies use chemical cleaning methods, which require solvents, are not environmentally friendly, and are prone to "hydrogen embrittlement", the decontamination effect is not ideal, the decontamination speed is slow, and it is easy to affect the mechanical properties of aluminum foil.

Method used

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  • Plasma cleaning process for aluminum foil of lithium ion battery
  • Plasma cleaning process for aluminum foil of lithium ion battery
  • Plasma cleaning process for aluminum foil of lithium ion battery

Examples

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preparation example Construction

[0068] Further preferably, the preparation method also includes:

[0069] The gas generated in step 1) is pumped into an absorption tank to obtain fertilizer, wherein the absorption tank is soda lime.

[0070] S102. Put the precipitate and the ionic liquid B into a grinder for grinding to obtain nanomaterials with a particle size of 1-200 nm.

[0071] Preferably, the grinder is a diamond grinder.

[0072] The production of high-purity rare earth materials is achieved by chemical sol and gel methods. However, in the process of realizing the chemical sol-gel method, the agglomeration of rare earth ions is very serious. If the particles of rare earth produced by the precipitation method are too large, it will affect the diffusion of rare earth in aluminum, thereby affecting the chemical reaction of aluminum atoms to form regular octahedra. .

[0073] The inventor has proved through a large number of experiments that the particle size of rare earth elements best dispersed in al...

Embodiment 1

[0106] 1. Preparation of rare earth aluminum master alloy ingots:

[0107] 1. Add praseodymium carbonate to 1-ethyl-3-methylimidazolium tricyanomate for dispersion, the weight ratio of praseodymium and 1-ethyl-3-methylimidazolium tricyanomate is 1:1 , the reaction temperature is 90°C, and carbon dioxide is introduced to obtain precipitate and ionic liquid B, and the generated gas is introduced into the soda lime absorption tank, and is absorbed by soda lime to make fertilizer;

[0108] 2. Put the precipitate and ionic liquid B into a diamond grinder for grinding, and grind for 1 hour to obtain nanomaterials with a particle size of 1-200nm;

[0109] 3. Distill the nanomaterials under reduced pressure to obtain nanoparticles;

[0110] 4. Wash the nanoparticles with deionized water, and heat and dry them at a temperature of 100°C;

[0111] 5. Grind the dried nanoparticles and aluminum powder, mix and stir, and press into a powder cake according to a weight ratio of 1:900. The a...

Embodiment 2

[0119] 1. Preparation of rare earth aluminum master alloy ingots:

[0120] 1. Add the ammonium salt of neodymium into 1-butyl-3-methylimidazolium hexafluorophosphate for dispersion, the weight ratio of neodymium and 1-butyl-3-methylimidazolium hexafluorophosphate is 1:1, The reaction temperature is 95°C, and ammonia gas is introduced to obtain precipitates and ionic liquid B. The generated gas is introduced into the soda lime absorption tank and absorbed by soda lime to make fertilizer;

[0121] 2. Put the precipitate and ionic liquid B into a diamond grinder for grinding, and grind for 2 hours to obtain nanomaterials with a particle size of 1-200nm;

[0122] 3. Distilling the nanomaterials under reduced pressure and extracting them to obtain nanoparticles.

[0123] 4. Wash the nanoparticles with deionized water, and heat and dry them at a temperature of 110°C

[0124] 5. Grind the dried nanoparticles and aluminum powder, mix and stir, and press into a powder cake according ...

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Abstract

The invention discloses a plasma cleaning process for aluminum foil of a lithium ion battery. The process includes the steps that firstly, rare earth elements are ground to obtain a nano rare earth material with the grain size being 1-200 nm, the nano rare earth material and aluminum powder are ground, mixed and stirred and then pressed into a powder cake, and then the powder cake is melted and cast into a rare earth aluminum intermediate alloy ingot; secondly, the rare earth aluminum intermediate alloy ingot and an aluminum ingot are added into a smelting furnace to be smelted, and a blank is obtained; thirdly, the smelted blank is made into primary finished aluminum foil; fourthly, the primary finished aluminum foil is subjected to plasma cleaning through at least two plasma generators which are arranged on the front face and the back face of the primary finished aluminum foil correspondingly and filled with air, argon and pure oxygen or ozone; and fifthly, the primary finished aluminum foil subjected to plasma cleaning is slit into rolls, and the finished aluminum foil is obtained. The plasma cleaning process is environmentally friendly, capable of saving energy, complete in decontamination, high in decontamination speed and capable of guaranteeing the mechanical property of the aluminum foil.

Description

technical field [0001] The invention relates to the technical field of metal aluminum, in particular to a plasma cleaning process for aluminum foil of a lithium ion battery. Background technique [0002] The requirements for aluminum foil for lithium-ion batteries are higher than those for ordinary aluminum foil: [0003] First, the working environment of aluminum foil for lithium-ion batteries is relatively harsh. During the charging and discharging process of lithium-ion batteries, the positive electrode material is prone to heat, and the positive electrode material has the largest contact area with aluminum foil. Aluminum foil is required to maintain good tensile strength and other mechanical properties after thermal cycling. [0004] Second, the working environment of aluminum foil for lithium batteries is inside the battery, which has the corrosion effect of lithium hexafluorophosphate electrolyte, so the aluminum foil is required to be resistant to the corrosion of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G5/00C22C1/03
CPCC22C1/026C22C1/03C23G5/00
Inventor 周伟杰刘锴
Owner 佛山金兰铝厂有限公司
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