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Adhesive for aqueous solution type lithium battery ceramic separator and preparation method thereof, and application of adhesive for aqueous solution type lithium battery ceramic separator

A technology of ceramic diaphragm and adhesive, which is applied in the direction of secondary batteries, battery components, circuits, etc., can solve the problems of unpredictable influence on the comprehensive performance of lithium-ion batteries, achieve good process and product stability, and optimize production Effect of process flow, good self-dispersion and self-wetting properties

Inactive Publication Date: 2019-08-30
湖南高瑞电源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of the above-mentioned additives is small, but it will still have an unpredictable impact on the key quality characteristics of the slurry, such as heat resistance, water absorption, coating, etc., especially on the comprehensive performance of lithium-ion batteries

Method used

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  • Adhesive for aqueous solution type lithium battery ceramic separator and preparation method thereof, and application of adhesive for aqueous solution type lithium battery ceramic separator
  • Adhesive for aqueous solution type lithium battery ceramic separator and preparation method thereof, and application of adhesive for aqueous solution type lithium battery ceramic separator

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Put 10g of PVA into the beaker, add water to a total mass of 400g, and stir in a water bath at 95°C until the PVA is completely dissolved. After the PVA solution is cooled to below 40° C., a metered amount of acrylic acid is added dropwise to make the pH of the system reach 5.5±0.2. Then put 10g of N-methylolacrylamide (NMA) and 0.1g of ammonium persulfate into the solution, stir and dissolve, heat up to 75°C, keep stirring, react for 1.5~2 h, cool and collect; the obtained product is It is a transparent homogeneous aqueous solution with a viscosity of about 200 cp.

Embodiment 2

[0045] All the other are the same as Example 1, except that the consumption of PVA and NMA becomes 20 g, and the consumption of ammonium persulfate becomes 0.2 g; the product obtained is a colorless translucent semigel homogeneous aqueous solution with a viscosity of about 50000 cp.

Embodiment 3

[0047] Put 30 ± 2 g of the adhesive described in Example 1 into the beaker, and add pure water to a total mass of 100 ± 2 g. After fully dispersed and uniform, add 50±5 g of alumina powder ceramics. Use an overhead electric agitator equipped with a four-blade stirring paddle to disperse for 30-60 min at a speed of 800-1000 rpm to obtain the alumina ceramic diaphragm slurry.

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Abstract

The invention discloses an aqueous solution type adhesive and a preparation method thereof, and application of an aqueous solution type adhesive. The adhesive is synthesized by employing a solution polymerization method by taking water as a solvent, and the synthetic raw materials and the product are water-soluble; and the synthetic raw materials comprise the following components in parts by mass:1-50 parts of a film-forming component, 1-50 parts of an acrylamide monomer, 0-10 parts of an assistant crosslinker, 350-550 parts of deionized water, 0-5 parts of an acidity regulator, and 0.01-0.5parts of an initiator. Powder ceramic material is directly input into the adhesive solution and is fully dispersed to obtain slurry finished product, and no other auxiliary agents such as a dispersingagent, a thickening agent or a wetting agent are required to be added in the slurry preparation process. The adhesive prepared by the invention has good self-dispersibility and self-wettability, goodheat resistance, low transverse and longitudinal thermal shrinkage rates and low water absorption.

Description

technical field [0001] The invention relates to an adhesive, in particular to an aqueous solution type lithium battery ceramic diaphragm special adhesive and its preparation method and application. Background technique [0002] All kinds of new energy batteries represented by lithium-ion batteries are widely used in daily life and cutting-edge technology fields. With the increasing demand for new energy batteries in the market, how to improve production efficiency and expand production capacity under the premise of ensuring the safety and effectiveness of batteries has become an urgent issue for major new energy battery manufacturers and their upstream suppliers. . The main components of the battery include the shell, the electrolyte, the positive and negative electrodes, and the separator. Among them, the separator, which is the core component of the battery, is currently mainly coated with powder ceramics. Its production involves the use of powder ceramic materials prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M2/14H01M10/0525C08F220/58C08F220/06
CPCC08F220/58H01M10/0525H01M50/403H01M50/431C08F220/06Y02E60/10
Inventor 蔡小川刘龙席柳江刘海明黄梦琴陈华丽杨科
Owner 湖南高瑞电源材料有限公司