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Lamination piece for lithium ion battery soft package and preparation method of lamination piece

A lithium-ion battery and laminate technology, which is applied in the directions of lamination, lamination device, lamination auxiliary operation, etc., can solve the problems of environmental pollution, environmental pollution of aluminum-plastic film, difficult post-processing, etc., and achieves good anti-corrosion performance. , the effect of high peel strength and heat sealing strength, excellent bonding performance

Inactive Publication Date: 2014-07-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, although aluminum-plastic films for lithium-ion batteries have been produced industrially, most of the surface-treated films on aluminum foil are chromium-treated films, and there is serious environmental pollution in the preparation process of aluminum-plastic films.
For example, the Chinese invention patent (application number 200410089189.2) discloses a lithium battery flexible packaging film and its manufacturing method. The chemical conversion film layer used is a chemical treatment layer formed by chromization treatment. After treatment, a large amount of hexavalent chromium waste liquid is produced. Difficult post-processing, serious pollution to the environment

Method used

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  • Lamination piece for lithium ion battery soft package and preparation method of lamination piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of Molybdenum Phosphorus Chemical Conversion Coating on Aluminum Foil Surface

[0039] 1) Degreasing aluminum foil;

[0040] 2), aluminum foil cleaning, clean the degreasing aluminum foil with water;

[0041] 3) Molybdenum-phosphorus chemical conversion treatment on aluminum foil: the surface of aluminum foil is impregnated and applied at a temperature of 35℃. It contains 5g / l ammonium molybdate, 30g / l phosphoric acid, 10g / l sodium fluoride and 1g / l nickel sulfate. Treatment liquid, treatment time is 1min;

[0042] 4), aluminum foil cleaning, the aluminum foil that has undergone transformation treatment is cleaned with water;

[0043] 5) The aluminum foil is dried. The aluminum foil is heated and dried at 60-150°C to form a molybdenum-phosphorus chemical conversion film.

[0044] 2. Preparation of the outer layer

[0045] The surface-treated aluminum foil and the polyurethane adhesive for nylon film are compounded together through a dry compounding process. The dry...

Embodiment 2

[0049] 1. Preparation of Molybdenum Phosphorus Chemical Conversion Coating on Aluminum Foil Surface

[0050] 1) Degreasing aluminum foil;

[0051] 2), aluminum foil cleaning, clean the degreasing aluminum foil with water;

[0052] 3) Molybdenum-phosphorus chemical conversion treatment on aluminum foil: the surface of aluminum foil is dipped and applied at a temperature of 35°C. It contains sodium molybdate 2g / l, pyrophosphate 30g / l, sodium fluoride 5g / l and sodium silicate 1g / l Surface treatment liquid, the treatment time is 1min;

[0053] 4), aluminum foil cleaning, the aluminum foil that has undergone transformation treatment is cleaned with water;

[0054] 5) The aluminum foil is dried. The aluminum foil is heated and dried at 60-150°C to form a molybdenum-phosphorus chemical conversion film.

[0055] 2. Preparation of the outer layer

[0056] The surface-treated aluminum foil and the polyurethane adhesive for nylon film are compounded together through a dry compounding process. The ...

Embodiment 3

[0060] 1. Preparation of Molybdenum Phosphorus Chemical Conversion Coating on Aluminum Foil Surface

[0061] 1) Degreasing aluminum foil;

[0062] 2), aluminum foil cleaning, clean the degreasing aluminum foil with water;

[0063] 3), aluminum foil molybdenum phosphorus chemical conversion treatment: the surface of the aluminum foil is dipped and applied at a temperature of 35°C, containing 6g / l ammonium molybdate, 50g / l phosphoric acid, 3g / l hydrogen fluoride and 4g / l sodium silicate. Liquid, treatment time is 1min;

[0064] 4), aluminum foil cleaning, the aluminum foil that has undergone transformation treatment is cleaned with water;

[0065] 5) The aluminum foil is dried. The aluminum foil is heated and dried at 60-150°C to form a molybdenum-phosphorus chemical conversion film.

[0066] 2. Preparation of the outer layer

[0067] The surface-treated aluminum foil and the polyurethane adhesive for nylon film are compounded together through a dry compounding process. The dry thickness ...

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Abstract

The invention discloses a lamination piece for a lithium ion battery soft package and a preparation method of the lamination piece. The lamination piece comprises a basic layer, an outer bonding layer, an aluminum foil layer, an inner bonding layer and a heat seal layer, wherein a molybdenum-phosphorus chemical conversion film is arranged between aluminum foil and the inner and outer bonding layers and is prepared by applying a surface treatment solution containing molybdenum salt, phosphoric acid, a fluorine compound and an accelerant to the surface of the aluminum foil by adopting an immersion treatment mode. The lamination piece does not contain hexavalent chromium heavy metal ions which cause serious environmental pollution and are carcinogenic to a human body, is excellent in corrosion resistance and bonding performance, and is especially suitable for lithium ion battery soft package materials.

Description

Technical field [0001] The invention relates to a lithium-ion battery soft packaging material, in particular to a laminated sheet for a lithium-ion battery soft packaging and a preparation method thereof. Background technique [0002] Lithium-ion battery, as a new type of energy, has the advantages of high working voltage, long cycle life, high specific energy, no memory effect, and low self-discharge. It is widely used in mobile phones, PDAs, laptops, camcorders, DVDs, and discs. Digital devices such as video cameras are currently being developed and applied in the field of electric vehicles (electric bicycles, motorcycles, and automobiles). It is precisely because of the excellent performance and wide application prospects of lithium-ion batteries that they are known as the green chemical energy of the 21st century. At present, countries around the world have formed an upsurge in research and development of key materials for high-performance lithium-ion batteries. Lithium-ion...

Claims

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Application Information

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IPC IPC(8): H01M2/02B32B33/00B32B37/14H01M50/126H01M50/145
CPCB32B15/20B32B33/00B32B37/14B32B38/08H01M50/124Y02E60/10
Inventor 徐世爱梁昌盛
Owner EAST CHINA UNIV OF SCI & TECH