Preparation method and application of polyacrylonitrile-acrylic acid high-molecular material

A polymer material, polyacrylonitrile technology, used in electrical components, circuits, battery electrodes, etc., can solve the problem that the adhesion of the pole piece is not very high, the negative pole piece cannot be stable, and the walking performance of the negative slurry is not very stable. and other problems to achieve the effect of increasing stability

Active Publication Date: 2015-11-25
吴位跃
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polyacrylic acid is better than other binder materials, the performance of the negative electrode slurry made by simply using polyacrylic acid binder is not very stable, and the adhesion of the pole piece is not very high, making the negative pole piece unstable. exert its performance

Method used

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  • Preparation method and application of polyacrylonitrile-acrylic acid high-molecular material
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  • Preparation method and application of polyacrylonitrile-acrylic acid high-molecular material

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Embodiment 1

[0028] The steps in the production stage of polyacrylonitrile-acrylic acid polymer materials are as follows:

[0029] Step 1, initial feeding stage: Weigh distilled water, emulsifier sodium dodecyl sulfate (SDS), and monomeric acrylic acid according to the ratio of mass fraction 69.25:0.6:20 and add them to the reactor, stirring at a speed of 200rmp The side water bath was heated to 65°C.

[0030] Step 2, initiation stage: add 0.15% initiator KPS at a rate of 15 ml / h, and continue stirring at constant temperature for 30 minutes.

[0031] Step 3, emulsification reaction stage: add 10% monomeric acrylonitrile at a rate of 10 ml / h. The mass ratio of acrylic acid to acrylonitrile is 20:10. After all the monomers were added, the stirring was continued, and the reaction was continued for 2 hours in the reactor.

[0032] Step 4, aging stage: raise the temperature to 70° C. and continue stirring for 1 hour to stop the reaction.

[0033] Step 5, taking out the sample: after the sol...

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Abstract

The invention discloses a preparation method for a polyacrylonitrile-acrylic acid high-molecular material. The preparation method comprises the following steps: material weighing; dispersing; initiation; emulsification; aging; etc. Through the steps, solid binder powder is prepared, and the solid binder powder is the polyacrylonitrile-acrylic acid high-molecular material. The invention also discloses a method for applying the polyacrylonitrile-acrylic acid high-molecular material in a battery. The polyacrylonitrile-acrylic acid high-molecular material does not have toxicity harmful to people, is free of the disadvantage of poor coating property of slurry, improves stability of a negative pole piece and is applicable to preparation of high power lithium ion power battery.

Description

technical field [0001] The invention belongs to the technical field of battery manufacturing, and in particular relates to a preparation method of a polyacrylonitrile-acrylic acid polymer material and its application in batteries. Background technique [0002] Lithium-ion batteries are widely used in electronic communication fields such as mobile phones, notebook computers, and cameras, and occupy a dominant position. The negative electrode is an important part of lithium-ion batteries, and the binder in the negative electrode has received more and more attention in the past 10 years, which is the focus of the future development of lithium-ion batteries. In lithium-ion batteries, the adhesive composed of polymers binds the active material and the current collector well, providing a track for the transfer of electrons. Since the binder material is found to be the main factor to enhance the electrochemical performance of the anode material, especially the high theoretical cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/46C08F220/06H01M4/62
CPCY02E60/10
Inventor 宫丽媛陈坤
Owner 吴位跃
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