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Preparation method of environment-friendly adhesive for lithium ion battery

A technology of lithium-ion batteries and adhesives, applied in the direction of adhesive types, grafted polymer adhesives, adhesives, etc., can solve problems such as large amount of NMP, environmental pollution, and damage to the health of operators, reaching the price Low cost, stable process and light weight effect

Active Publication Date: 2013-01-16
Z RIVER GRP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the solvent-based binder used in the manufacturing process of lithium-ion batteries is mainly PVdF / N-methylpyrrolidone (NMP) system. NMP is designated as a third-class toxic chemical in Germany and other countries, and the concentration allowed to be discharged into the air is 100 mg / m 3 , NMP is used in a large amount in the battery manufacturing process, which not only causes serious pollution to the environment, but also has certain damage to the health of operators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Example 1. A preparation method of an environmentally friendly lithium ion battery binder,

[0073] The main raw material is composed of the following parts by weight:

[0074] As component I, 30 parts of soft water, 20 parts of corn starch, 5 parts of oxalic acid solution with a mass concentration of 20%;

[0075] As component II, 14.7 parts of soft water, 0.2 parts of fatty acid potassium soap, 15 parts of acrylic acid, 10 parts of butyl methacrylate,

[0076] 0.1 part of potassium persulfate solution with a mass concentration of 15%.

[0077] Use sodium hydroxide solution with a mass concentration of 20% as the lye to adjust the pH value, and use it in the following steps 1) and 4).

[0078] Follow these steps in sequence:

[0079] 1) Modification of starch:

[0080] In the reaction flask, after mixing the soft water and corn starch as component I, stir uniformly at the modification temperature of 25°C; keep the temperature at 25°C, and add lye dropwise to the resulting reaction ...

Embodiment 2

[0107] Embodiment 2. A preparation method of an environmentally friendly lithium ion battery binder,

[0108] The main raw material is composed of the following ingredients by weight:

[0109] As component I, 20 parts of soft water, 20 parts of sweet potato starch, 15 parts of carbonic acid solution with a mass concentration of 25%;

[0110] As component II, 15 parts of soft water, 1 part of disproportionated rosin soap, 13.5 parts of acrylic acid, 10 parts of ethyl methacrylate,

[0111] 0.5 part of potassium persulfate solution with a mass concentration of 25%.

[0112] A triethanolamine solution with a mass concentration of 20% is selected as the lye for adjusting the pH value.

[0113] Follow these steps in sequence:

[0114] 1) Modification of starch:

[0115] In the reaction flask, after mixing the soft water and sweet potato starch as component I, they are uniformly stirred at the modification temperature of 40°C; keeping the 40°C, lye is added dropwise to the resulting reaction sys...

Embodiment 3

[0133] Embodiment 3. A preparation method of an environmentally friendly lithium-ion battery binder, which consists of the following components by weight as main raw materials:

[0134] As component I, 30 parts of soft water, 10 parts of wheat starch, 10 parts of oxalic acid solution with a mass concentration of 30%,

[0135] As component II, 15 parts of soft water, 1 part of fatty acid potassium soap, 20 parts of acrylic acid, 13.7 parts of butyl acrylate,

[0136] 0.3 parts of potassium persulfate solution with a mass concentration of 20%.

[0137] Sodium hydroxide solution with a mass concentration of 25% is selected as the lye.

[0138] Follow these steps in sequence:

[0139] 1) Modification of starch:

[0140] In the reaction flask, after mixing the soft water and wheat starch as component I, stir uniformly at the modification temperature of 30°C; keep the temperature at 30°C and add lye dropwise to the resulting reaction system to increase the pH of the reaction system To 9, then ...

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Abstract

The invention discloses a preparation method of an environment-friendly adhesive for a lithium ion battery. The preparation method includes the following steps of firstly, starch modification: modifying soft water and starch under alternative actions of binary acid solution and alkali liquor and obtaining modified starch; secondly, emulsified liquor preparation: uniformly stirring the soft water and emulsifier, then adding crylic acid and acrylate to pre-emulsify to obtain emulsified liquor; thirdly, starch reinforcement: taking part of the emulsified liquor obtained in the second step, heating to the temperature 30-45 DEG C, adding all the modified starch obtained in the first step with stirring and adding trigger solution, stirring until reactant obtained is transparent solution; and fourthly, adhesive preparation: heating the transparent solution obtained in the third step to 50-60 DEG C, dripping the residual emulsified liquor, and adjusting the pH (potential of hydrogen) value to be 7-9 by the alkali liquor to obtain the environment-friendly adhesive for the lithium ion battery.

Description

Technical field [0001] The invention belongs to the field of adhesive preparation, relates to the preparation of lithium ion battery adhesives, and in particular relates to a preparation method of a type of environmentally friendly lithium ion battery adhesives. Background technique [0002] Lithium-ion battery is a new type of high-performance battery that has been developing rapidly in the past 20 years. It has many advantages such as high voltage, light weight, high specific energy density, and low self-discharge. Its application range covers civil, defense, aerospace and other fields. . At present, the solvent-based binder used in the manufacturing process of lithium-ion batteries is mainly PVdF / N-methylpyrrolidone (NMP) system. NMP is classified as a three-category toxic chemical in Germany and other countries, and the mass concentration allowed into the air is 100 mg / m 3 In the battery manufacturing process, the amount of NMP is large. It not only causes serious pollution ...

Claims

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Application Information

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IPC IPC(8): C09J151/02C08F251/00C08F220/06C08F220/18C08B31/04
Inventor 张超张炜叶传伟计立陈新志
Owner Z RIVER GRP LTD
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