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A kind of flexible membrane with composite coating and preparation method thereof

A composite coating, flexible film technology, applied in the direction of strength characteristics, instruments, structural parts, etc., can solve the problems of inability to real-time feedback of the preparation process, inability to directly apply the production line, inability to optimize the process flow, etc., to avoid film damage. , the process is non-destructive and accurate, suitable for real-time control effect

Active Publication Date: 2020-12-22
河南功能高分子膜材料创新中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method can usually only be used in the laboratory, has a certain degree of irreversible destructiveness, and cannot be directly applied to the production line
Therefore, it is impossible to directly provide real-time feedback on the preparation process, so that the entire process cannot be optimized.

Method used

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  • A kind of flexible membrane with composite coating and preparation method thereof
  • A kind of flexible membrane with composite coating and preparation method thereof
  • A kind of flexible membrane with composite coating and preparation method thereof

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Embodiment Construction

[0034] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] Diaphragm preparation method

[0036] Raw material A is polyethylene, specifically, it may include the following two parts, and according to a large number of experiments, the preferred weight ratio of the two parts is 1:1.53.

[0037] A1: The molecular weight is 6.5×10 6 -8.5×10 6 polyethylene particles;

[0038] A2: The density is 0.966-0.983g / cm 3 polyethylene particles;

[0039] Raw material B is paraffin oil; raw...

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Abstract

A method for preparing a flexible film with a composite coating, comprising preparing a polyethylene film; carrying out conventional stretching followed by two-dimensional stretching; coating the film with a first layer of coating, and then coating the film with a second layer of coating Sputtering, after softness inspection and preparation process control treatment of polyethylene film with composite coating, film formation to produce a film with suitable softness. Utilizing such a thin film as a lithium battery separator can prevent the coating from falling off during transportation, installation, and use, and has high safety and good mechanical and electrical properties.

Description

technical field [0001] The invention relates to the technical field of lithium battery diaphragm and its preparation. Background technique [0002] Separator is an important part of lithium battery, which directly determines the performance and safety of lithium battery. Usually the diaphragm is an insulating material with a porous structure. During the use of lithium batteries, lithium dendrites will inevitably be generated, and they will continue to grow and pierce the separator, causing safety accidents. In the prior art, ceramic coatings are used to prevent the growth of lithium dendrites and puncture the diaphragm, but the reaction between Si element in the ceramic and metal lithium leads to excessive loss of effective lithium in the battery, thereby affecting the electrical performance of the lithium battery. [0003] In addition, the protection of the membrane by the coating is more theoretically realized, and the falling fragments of the coating will pierce the mem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/052G01N3/42
CPCG01N3/42G01N2203/0019G01N2203/0037G01N2203/0075G01N2203/0282G01N2203/0641G01N2203/0676G01N2203/0682H01M10/052Y02E60/10
Inventor 黄晓谨李丽丽袁永浩杜俊鹏聂夕冉史海生苏帅杰李勇敢田传永
Owner 河南功能高分子膜材料创新中心有限公司
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