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Porous carrier and electrochemical device separator

A porous and carrier technology, applied in the field of carrier and isolation membrane, can solve the problems of shortening the life of lithium-ion batteries and increasing the impedance of lithium-ion batteries, and achieve the effect of not being easy to compress, not easy to increase impedance, and not easy to void

Active Publication Date: 2020-11-24
TAIWAN HOPAX CHEM MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because cellulose itself is not elastic, if cellulose is used as the material of the non-woven separator, the separator will be compressed after long-term charge and discharge cycles of the lithium-ion battery, resulting in gaps between the electrodes and the separator, which will cause Increased impedance of Li-ion batteries, which shortens Li-ion battery life

Method used

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  • Porous carrier and electrochemical device separator
  • Porous carrier and electrochemical device separator
  • Porous carrier and electrochemical device separator

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0082] First, mix PMMA particles in N-methyl-2-pyrrolidone (N-methyl-2-pyrrolidone, NMP) solvent, the weight ratio of the two is 10:90 in sequence, and then use ultrasonic dispersion for 30 minutes to form a mixture solution . Then, polyvinylidene difluoride (polyvinylidene difluoride, PVDF, purchased from Japan Kureha Corporation (KUREHA Corporation), model W1700) was added to the mixture solution, wherein the weight ratio of PVDF to the mixture solution was 2:98, and it was A slurry was prepared after fully stirring and dissolving for 24 hours. Then, use the No. 10 wire bar to evenly coat the slurry on one side of the paper separator (purchased from Japan High Paper Industry Co., Ltd.) and put it into an oven, and dry it at 90 ° C for 1 hour to obtain the sample of Example 1. porous carrier.

example 2

[0084] The porous carrier of Example 2 was prepared according to the procedure similar to that of Example 1, the difference being that in Example 2, the PMMA particles were replaced by PMMA-PS particles. Thus, the porous support of Example 2 could be produced.

Embodiment 1

[0100] The single-layer porous carrier of Example 1 is cut into a size of 5 cm × 5 cm, and then stacked to a thickness of about 2 cm, that is, stacked into a multi-layer porous carrier of about 100 layers, the multi-layer porous carrier of Example 1 can be prepared. layers of porous carriers.

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Abstract

The invention provides a porous carrier and an electrochemical device separator. The porous carrier includes a cellulose substrate and a functional layer. The functional layer is located on at least one surface of the cellulose substrate, and the functional layer includes an organic polymer elastic filler and a polymer binder.

Description

technical field [0001] The invention relates to a carrier and an isolation film, in particular to a porous carrier and an electrochemical device isolation film. Background technique [0002] Currently, lithium-ion batteries can be used as storage batteries for portable devices such as notebook personal computers or mobile phones, hybrid vehicles or electric vehicles. Due to the characteristics of lithium-ion batteries that can be recharged and discharged repeatedly, light weight, high voltage value and high energy density, the market demand is increasing day by day, and users' requirements for the service life of lithium-ion batteries are also getting higher and higher. [0003] The separator in lithium-ion batteries must have good stability for electrolytes and electrodes, and non-woven fabrics have better ion conductivity, wettability and high temperature resistance than other materials. However, because cellulose itself is not elastic, if cellulose is used as the materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M2/14H01M2/18H01M10/0525H01M50/42H01M50/429H01M50/449H01M50/457H01M50/489
CPCH01M10/0525H01M50/42H01M50/489H01M50/429H01M50/449H01M50/457Y02E60/10H01M50/4295H01M50/44H01M50/461H01M50/46H01G11/52H01M10/052H01M50/491H01M50/414H01M50/443
Inventor 吉武秀哉张惟闵何丽贞郭聪田张凯奇
Owner TAIWAN HOPAX CHEM MFG