Electrochemical battery

An electrochemical and battery technology, applied in the field of manufacturing the separator and electrochemical battery, can solve problems such as thermal explosion, and achieve the effects of improving battery performance, high-efficiency charging/discharging characteristics, and avoiding performance degradation

Active Publication Date: 2020-12-15
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, short-circuit current flows through the battery, and the battery continuously generates heat, which eventually leads to a thermal explosion

Method used

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  • Electrochemical battery
  • Electrochemical battery
  • Electrochemical battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0105] Preparation Example 1: Preparation of the First Solution

[0106] Mix 7% by weight of polyvinylidene fluoride homopolymer (Solvay 5120 (Solef 5120), Solvay Specialty Polymers (Solvay Specialty Polymers)) and 93% by weight of dimethylacetamide (DMAc, Dazhong Chemical and Metal Co., Ltd. company), followed by stirring at 40°C for 3 hours, thereby preparing the first solution.

preparation example 2

[0107] Preparation Example 2: Preparation of the Second Solution

[0108] 7% by weight of polyvinylidene fluoride copolymer (KF9300, Kureha Chemicals) and 93% by weight of dimethylacetamide (DMAc, Dazhong Chemical and Metal Co., Ltd.) were mixed, followed by stirring at 40°C for 3 hours, thus preparing a second solution.

preparation example 3

[0109] Preparation example 3: preparation of the third solution

[0110] A third solution was prepared by mixing 10% by weight of poly(methyl methacrylate) and 90% by weight of acetone, followed by stirring at 40°C for 1 hour.

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Abstract

The present invention provides a heat-resistant porous layer composition, a separator for an electrochemical cell, and an electrochemical cell comprising the same. Wherein, the separator comprises a porous substrate and a heat-resistant porous layer formed on one surface or both surfaces of the porous substrate, wherein the heat-resistant porous layer comprises a cross-linkable adhesive, and as at 200° C. The separator has a tensile strength of 50 kgf / cm2 to 350 kgf / cm2, measured after being held for 10 minutes. The separator of the present invention is not broken even when charged / discharged for a long time, and a battery fabricated using the separator can exhibit high-efficiency charge / discharge characteristics and avoid performance degradation. In addition, the separator of the present invention can have excellent air permeability and adhesion to the substrate, thereby improving battery performance.

Description

technical field [0001] The present invention relates to a heat-resistant porous layer composition having high heat resistance, a separator comprising the heat-resistant porous layer composition and having excellent crack resistance at high temperatures, a separator using the heat-resistant porous layer composition, Electrochemical cells with a separator and a method of making the same. Background technique [0002] A separator for an electrochemical cell refers to an intermediate membrane that separates the anode and cathode in the cell and maintains ion conductivity throughout, thereby allowing the cell to charge / discharge. [0003] When the battery is short-circuited, a high current passes therethrough while generating heat, thereby increasing the temperature of the battery and thermally running away. As a result, the electrolyte evaporates or heats up, causing the safety valve to operate or the battery to catch fire. In order to prevent these problems, there has been pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L35/02C08L27/16C08K3/22C08F122/14C08F114/22C08F214/22D06N3/04H01M2/16H01M2/14H01M10/052H01M10/0525H01M50/403H01M50/417H01M50/42H01M50/426H01M50/443H01M50/449H01M50/451H01M50/457H01M50/489H01M50/494
CPCC08F114/22C08F122/14C08F214/22C08L35/02D06N3/042D06N3/047H01M10/052H01M10/0525H01M50/489H01M50/417H01M50/494H01M50/449H01M50/451H01M50/443H01M50/42H01M50/426H01M50/403H01M50/457C08L27/16C08K2003/2227C08G65/3322Y02E60/10H01M50/446C08J5/22C08L71/02C08J9/0061C08K3/013C08K3/22C08L27/20
Inventor 朴鎭奎崔钟燮崔玹瑄
Owner SAMSUNG SDI CO LTD
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