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High-acid-resistance aluminum-plastic film for lithium battery and preparation method

A high acid-resistant, aluminum-plastic film technology, applied in the direction of lithium batteries, battery pack components, chemical instruments and methods, etc., can solve the problem of poor acid corrosion resistance of surface heat-resistant resins, surface dissolution of aluminum-plastic films, and resistance to electrolysis Liquid and other problems, to achieve good hydrofluoric acid resistance, improve puncture resistance strength, improve the effect of barrier properties

Inactive Publication Date: 2020-07-03
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the aluminum-plastic film of the lithium battery that is widely used has the defects of poor surface heat-resistant resin acid corrosion resistance and intolerant electrolyte. When the lithium battery is produced and used, it is easy to cause dissolution and corrosion of the surface of the aluminum-plastic film, resulting in the battery being scrapped. etc., the present invention proposes a high-acid-resistant aluminum-plastic film for lithium batteries and its preparation method, which can effectively solve the above-mentioned technical problems

Method used

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  • High-acid-resistance aluminum-plastic film for lithium battery and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0031](1) Add polyphenylene sulfide pure resin, terephthalate solvent, carbon fiber, heat stabilizer and antioxidant to twin-screw extruder for melting, and then cast and cool to form a film to obtain polyphenylene sulfide / Carbon fiber film; terephthalate solvent is dimethyl terephthalate; thermal stabilizer is dialkyl tin maleate; antioxidant is antioxidant 1010; the screw diameter of twin-screw extruder is 50mm , the length-diameter ratio is 32:1, and the extrusion temperature is 270 °C; in the casting cooling film formation, the temperature of the cooling roll is 3 °C;

[0032] The raw materials are calculated by mass percentage: polyphenylene sulfide pure resin 52%, terephthalate solvent 32%, carbon fiber 13%, heat stabilizer 2%, antioxidant 1%;

[0033] (2) The heat-resistant polyethylene terephthalate film and the polyphenylene sulfide / carbon fiber film obtained in step (1) are formed into a dry-type composite film online through a calendering roller to obtain a composi...

Embodiment 2

[0038] (1) Add polyphenylene sulfide pure resin, terephthalate solvent, carbon fiber, heat stabilizer and antioxidant to twin-screw extruder for melting, and then cast and cool to form a film to obtain polyphenylene sulfide / Carbon fiber film; terephthalate solvent is ethylene terephthalate; heat stabilizer is bis(maleic acid monoester) dialkyl tin; antioxidant is antioxidant 1024; twin-screw extrusion The screw diameter of the machine is 60mm, the length-diameter ratio is 38:1, and the extrusion temperature is 310°C; in the casting cooling film formation, the temperature of the cooling roller is 8°C;

[0039] The raw materials are calculated by mass percentage: polyphenylene sulfide pure resin 45%, terephthalate solvent 34%, carbon fiber 17%, heat stabilizer 2%, antioxidant 3%;

[0040] (2) The heat-resistant polyethylene terephthalate film and the polyphenylene sulfide / carbon fiber film obtained in step (1) are formed into a dry-type composite film online through a calenderi...

Embodiment 3

[0045] (1) Add polyphenylene sulfide pure resin, terephthalate solvent, carbon fiber, heat stabilizer and antioxidant to twin-screw extruder for melting, and then cast and cool to form a film to obtain polyphenylene sulfide / Carbon fiber film; terephthalate solvent is butylene terephthalate; heat stabilizer is dioctyl tin maleate; antioxidant is antioxidant 3114; the screw diameter of twin-screw extruder is 55mm, the length-diameter ratio is 35:1, and the extrusion temperature is 290°C; in the casting cooling film formation, the temperature of the cooling roll is 5°C;

[0046] The raw materials are calculated by mass percentage: polyphenylene sulfide pure resin 49%, terephthalate solvent 32%, carbon fiber 15%, heat stabilizer 2%, antioxidant 2%;

[0047] (2) The heat-resistant polyethylene terephthalate film and the polyphenylene sulfide / carbon fiber film obtained in step (1) are formed into a dry-type composite film online through a calendering roller to obtain a composite pr...

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Abstract

The invention relates to the field of lithium battery packaging films, and discloses a high-acid-resistance aluminum-plastic film for a lithium battery and a preparation method. The preparation methodcomprises the following steps: (1) mixing polyphenylene sulfide pure resin, a terephthalate solvent, carbon fibers, a heat stabilizer and an antioxidant, extruding, casting, cooling and forming a film to obtain a polyphenylene sulfide / carbon fiber film; (2) carrying out dry composite film forming on the polyethylene glycol terephthalate film and the polyphenylene sulfide / carbon fiber film to obtain a composite protective layer; and (3) coating two sides of the aluminum foil layer with an adhesive, and respectively compounding with the polyphenylene sulfide film and the casting polypropylene film to obtain the high-acid-resistance aluminum-plastic film for the lithium battery. The aluminum-plastic film prepared by the invention has excellent acid resistance, can effectively prevent the corrosion of an electrolyte, and has good puncture resistance, tensile strength and wear resistance, so that the yield and reliability of the battery are improved, and the service life of the battery isgreatly prolonged.

Description

technical field [0001] The invention relates to the field of lithium battery packaging films, and discloses a high acid-resistant aluminum-plastic film for lithium batteries and a preparation method. Background technique [0002] With the rise of new energy vehicles in recent years, the demand for long-life, large-capacity, high-power power batteries is increasing. The polymer lithium-ion battery has natural safety, and the shape is free, it is very convenient to make a large and thin battery, which is not only convenient to make a large-capacity lithium-ion battery cell, but also conducive to the heat dissipation of the battery. Therefore, it becomes the first choice for power batteries. Correspondingly, the polymer power battery has put forward higher requirements on the reliability and service life of the aluminum-plastic packaging film of its packaging material. [0003] Flexible packaging aluminum-plastic film is an important raw material for polymer lithium-ion batte...

Claims

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Application Information

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IPC IPC(8): H01M2/02H01M10/052B32B7/12B32B15/08B32B15/085B32B15/20B32B27/06B32B27/08B32B27/18B32B27/28B32B27/32B32B27/36B32B33/00
CPCB32B7/12B32B15/08B32B15/085B32B15/20B32B27/06B32B27/08B32B27/18B32B27/285B32B27/286B32B27/32B32B27/36B32B33/00B32B2307/306B32B2307/50B32B2307/54B32B2307/554B32B2307/558B32B2307/714B32B2457/10H01M10/052H01M50/124Y02E60/10
Inventor 陈庆昝航何方陈涛
Owner CHENDU NEW KELI CHEM SCI CO LTD
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