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Battery foil rolling additive and preparation method and application thereof

A technology of additives and extreme pressure additives, applied in the direction of additives, lubricating compositions, petroleum industry, etc., can solve the problems of increasing production cost and delivery cycle, hindering rolling oil filtration, increasing recovery costs, etc., to achieve good dispersion performance and Filtration efficiency, reducing the cost of corona process, and improving the effect of surface dyne value

Active Publication Date: 2021-09-28
QUAKER CHEM CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(1) Due to its high polarity, the lubricating additive mainly composed of saturated fatty alcohol can meet the lubricating performance requirements during the battery foil rolling process, but the surface of the plate is seriously oily after rolling, and the dyne value cannot meet the requirements. This problem is especially serious in regions with lower temperatures, such as in the north
In order to solve this problem, the site is often supplemented with multi-pass corona treatment, which undoubtedly increases the production cost and delivery cycle
(2) When lubricating additives mainly based on saturated fatty acid esters are used in the battery foil rolling process, due to the non-gap rolling characteristics of battery foil rolling, it is difficult for long-carbon chain fatty acid esters to enter the roll gap area. Under the condition of high temperature and high pressure, the oil film in the roll gap area is prone to rupture, which will lead to quality problems such as scratches and color difference on the surface of the battery foil after rolling
Moreover, insufficient lubrication will also lead to a large amount of mechanical impurities such as aluminum powder in the rolling process. These impurities adhere to the surface of the rolling mill and are not conducive to cleaning; Increased recycling costs

Method used

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  • Battery foil rolling additive and preparation method and application thereof
  • Battery foil rolling additive and preparation method and application thereof
  • Battery foil rolling additive and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0063] 1,5-dihydroxy-3-adamantanecarboxylic acid, the preparation method is as follows:

[0064] Add 8g of adamantanecarboxylic acid and benzyltriethylammonium chloride (TEBAC, 0.7g) into a 150mL three-necked flask, stir in 80mL of 5% aqueous sodium hydroxide solution and 8mL of tert-butanol mixed solution and control the temperature at about 45°C . Add 8g of potassium permanganate and raise the temperature to 70°C and stir the reaction for 5h. Add 4g of anhydrous sodium sulfite to quench the reaction, stir and filter. The black filter cake was washed 5 times with 40°C hot water to obtain a clear filtrate. The clarified filtrate was adjusted to pH 3 with concentrated hydrochloric acid while stirring, and filtered after stirring for 20 min to obtain a white solid. The filtrate was extracted with ethyl acetate (40 mL×3 times), the combined organic layers were washed with saturated aqueous sodium chloride, dried over anhydrous sodium sulfate, and the solvent was evaporated to ...

Synthetic example 2

[0067] 1,5-dihydroxyl-3-adamantane carboxylate isopropyl ester, its preparation method comprises the steps:

[0068] (1) Place the dried 1,5-dihydroxy-3-adamantanecarboxylic acid (8g) in a 50mL round-bottomed flask, and slowly add a mixture of 5mL of oxalyl chloride and 8mL of dichloromethane dropwise with a constant pressure dropping funnel. After reacting at room temperature for 3 hours, the unreacted oxalyl chloride and solvent were removed by rotary evaporation to obtain 1,5-dihydroxy-3-adamantanecarbonyl chloride;

[0069] (2) Mix the 1,5-dihydroxy-3-adamantanecarbonyl chloride obtained in step (1) with 10 mL of dichloromethane to form a solution, and add dropwise a mixture of isopropanol and pyridine (isopropanol 3mL, pyridine 3mL), reacted in ice bath for 8h after the dropwise addition; the reaction solution was filtered to remove the pyridinium salt, washed, dried and concentrated to obtain 7.5g of isopropyl 1,5-dihydroxy-3-adamantanecarboxylate, The yield was 93.8%. ...

Embodiment 1

[0072] A battery foil rolling additive, comprising: 10% isobutyl laurate, 9.25% isobutyl myristate, 15% C12-14 fatty alcohol, 5% adamantane, 1,5 -23% of dihydroxy-3-adamantanecarboxylate, 37% of isopropyl 1,5-dihydroxy-3-adamantanecarboxylate, 0.75% of phosphorus-containing extreme pressure additive (phosphoric acid amine ester, Shandong Leon T304).

[0073]The preparation method of the battery foil rolling additive is as follows: uniformly mix isobutyl laurate, isobutyl myristate and C12-14 fatty alcohol according to the formula amount, and then, under the condition of heating and stirring at 60°C, adamantine Dissolve alkane, 1,5-dihydroxy-3-adamantanecarboxylic acid and isopropyl 1,5-dihydroxy-3-adamantanecarboxylate in it, stir evenly, add phosphorus-containing extreme pressure additives, stir for 1 hour until clear and transparent, and obtain The battery foil rolling additive.

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Abstract

The invention provides a battery foil rolling additive as well as a preparation method and application thereof. The battery foil rolling additive comprises the following components in percentage by mass: 10-20% of fatty acid ester, 15-30% of fatty alcohol, 45-65% of an adamantane compound and 0.1-5% of an extreme pressure additive, wherein the mass percentage content of dihydroxy adamantane isopropyl formate in the adamantane compound is 50 to 100 percent. According to the battery foil rolling additive, through matching of the components, especially the use of the adamantane compound with a specific molecular structure, the battery foil rolling additive has excellent lubricating performance, the surface quality of a rolled battery foil can be improved, the surface dyne value of the battery foil is increased, and the cost of a corona process is reduced; and meanwhile, the use of the battery foil rolling additive is beneficial to improving the dispersing performance and filtering efficiency of aluminum powder and improving the cleaning performance of a rolling mill.

Description

technical field [0001] The invention belongs to the technical field of metal rolling, and in particular relates to a battery foil rolling additive and its preparation method and application. Background technique [0002] In recent years, with the vigorous promotion and development of new energy vehicles, higher requirements have been placed on the battery capacity and safety performance of lithium-ion batteries. Usually, the lithium-ion battery industry uses rolled aluminum foil (ie, battery foil) as its positive electrode collector, and its surface quality directly affects the performance of lithium-ion batteries. The industry often has the following requirements for the surface quality of battery foil: (1) The surface pattern is smooth, without defects such as roller printing, pitting, corrosion, etc.; (2) The surface of the battery foil has no color difference; (3) There is no oil stain on the surface; (4) The dyne value of the surface of the battery foil is not less than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M163/00C10M127/02C10M129/46C10M129/76C10N30/04C10N30/06C10N40/24
CPCC10M163/00C10M127/02C10M129/46C10M129/76C10M2207/289C10M2207/021C10M2203/04C10M2207/16C10M2207/281C10N2030/06C10N2030/04C10N2040/24Y02E60/10
Inventor 马志明路瑶李云静冯泽
Owner QUAKER CHEM CHINA
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