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Porous polymer film for lithium-ion battery and preparation method and application of porous polymer film

A porous film and film technology, applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problems that cannot be put into large-scale production and practical application, complicated preparation process, high cost, etc., and achieve high practical value, smooth, continuous and complete surface sex high effect

Active Publication Date: 2016-04-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of traditional porous separators for lithium ion batteries is relatively complicated, the cost is high, and it cannot be put into large-scale production and practical application. It is more suitable for laboratory research. The method of diaphragm for batteries, the method of micro-layer co-extrusion combined with melt stretching method to prepare vinyl resin / propylene resin (calcium carbonate) alternating composite film, and obtain porous vinyl resin / propylene resin film by acid treatment

Method used

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  • Porous polymer film for lithium-ion battery and preparation method and application of porous polymer film
  • Porous polymer film for lithium-ion battery and preparation method and application of porous polymer film
  • Porous polymer film for lithium-ion battery and preparation method and application of porous polymer film

Examples

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Effect test

Embodiment 1

[0073] Example 1: Using submicron calcium carbonate (0.8 μm electronic grade) as a template, combined with micro-nano layer co-extrusion technology and acid etching method to prepare a porous polyethylene / polypropylene resin film with controllable pore structure and number of film layers .

[0074] The ratio of raw materials used is as follows:

[0075] 100 parts of polyethylene, by mass

[0076] 100 parts of polypropylene resin, by mass

[0077] Calcium carbonate particles (0.8μm electronic grade) 40 parts, by mass number

[0078] Dispersant-titanate coupling agent (TMC-101) 2 parts, by mass

[0079] Specific steps are as follows:

[0080] (1) Preparation of polyethylene resin / polypropylene resin (calcium carbonate) masterbatch

[0081] (1.1) Dissolve 2 parts of titanate coupling agent in ethanol solution and set aside;

[0082] (1.2) Put 40 parts of calcium carbonate particles (0.8μm electronic grade) into a high-speed mixer, heat up to 70°C, stir at a speed of 30-100r...

Embodiment 2

[0108] Example 2: Using submicron calcium carbonate (0.1 μm) as a template, a porous polyethylene / polypropylene resin film with controllable pore structure and number of film layers was prepared by combining micro-nano layer co-extrusion technology and acid etching method.

[0109] The ratio of raw materials used is as follows:

[0110] 100 parts of polyethylene, by mass

[0111] 100 parts of polypropylene resin, by mass

[0112] Calcium carbonate particles (0.1μm) 60 parts, by mass number

[0113] Dispersant-titanate coupling agent (TMC-101) 4 parts, by mass

[0114] Specific steps are as follows:

[0115] (1) Preparation of polyethylene resin / polypropylene resin (calcium carbonate) masterbatch

[0116] (1.1) Dissolve 4 parts of titanate coupling agent in ethanol solution and set aside;

[0117] (1.2) Put 60 parts of calcium carbonate particles (0.1 μm) into a high-speed mixer, heat up to 75°C, stir at a speed of 30-100rpm for 20min; put it in an oven at a constant tempe...

Embodiment 3

[0137] Example 3: Using submicron calcium carbonate (0.1 μm) as a template, combined with micro-nano layer co-extrusion technology, melt stretching method and acid etching method to prepare porous polyethylene / polyethylene with controllable pore structure and number of film layers Acrylic film.

[0138] The ratio of raw materials used is as follows:

[0139] 100 parts of polyethylene, by mass

[0140] 100 parts of polypropylene resin, by mass

[0141] Calcium carbonate particles (0.1μm) 140 parts, by mass number

[0142] Dispersant-titanate coupling agent (TMC-101) 5 parts, by mass

[0143] Specific steps are as follows:

[0144] (1) Preparation of polyethylene resin / polypropylene resin (calcium carbonate) masterbatch

[0145] (1.1) Dissolve 5 parts of titanate coupling agent in ethanol solution and set aside;

[0146] (1.2) Put 140 parts of calcium carbonate particles (0.1 μm) into a high-speed mixer, heat up to 75°C, stir at a speed of 30-100rpm for 20min; put it in an...

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Abstract

The invention belongs to the technical field of high polymer materials, in particular to a porous polymer film for a lithium-ion battery and a preparation method and an application of the porous polymer film. A vinyl resin / allyl resin composite film with an alternate-layered structure is prepared by a micro-nano laminated extrusion molding technology; and the porous vinyl resin / allyl resin film with uniform and controllable pore structure and film thickness is obtained through the processes of melting stretching, acid treatment and the like. The requirement of adding other materials to a polymer matrix is easily met; the prepared film is uniform in thickness, and can be adjusted through the number of layers and the thickness of an outlet of a film-forming mold; and the pore structure can be controlled by particle sizes, content and the like of calcium carbonate particles. The method provided by the invention is simple, feasible, low in cost and easy to produce on a large scale; the prepared porous polymer film is stable and controllable in structure and excellent in electrochemical properties, and has an application prospect in the fields of a lithium-ion battery separator, an energy source, absorption and separation, a sensor, a catalyst, a biotechnology and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a vinyl resin / propylene resin film and a preparation method and application thereof. Background technique [0002] Ordered porous films with micron and submicron pore sizes are a class of functional structural materials that have attracted much attention in recent years. It has been widely used in the fields of cell culture, microreactor and material preparation (Huang Tingting, Porous membrane film formation and adsorption process monitoring and determination of water-soluble ions in PM2.5. Shandong: Master's thesis of Shandong Normal University, 2014.5). Polyolefin-based porous films have excellent mechanical properties, chemical resistance and electrical properties, so their applications in packaging materials, medical fields and battery materials have attracted great attention. [0003] At present, the methods for preparing ordered porous films mainly i...

Claims

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Application Information

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IPC IPC(8): H01M8/1023H01M8/1081
CPCH01M8/1023H01M8/1081Y02E60/50
Inventor 浦鸿汀李亚捷杜江
Owner TONGJI UNIV
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