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Water binding agent for lithium ionic cell electric pole material and preparation method thereof

A water-based adhesive, lithium-ion battery technology, applied in battery electrodes, electrode manufacturing, adhesive types, etc., can solve problems such as environmental pollution and affecting the health of production personnel

Active Publication Date: 2009-06-17
MEISHAN INDIGO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a new type of water-based adhesive for lithium-ion battery electrode materials, which is environmentally friendly and can solve the pollution of solvent-based adhesives such as polyvinylidene fluoride to the environment and affect the health of production personnel. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 The preparation of the lithium ion battery electrode material aqueous binder of the present invention

[0034] In the present embodiment, butyl rubber is used as the core of the water-based adhesive latex particles, and the shell polymer is composed of hydrophilic monomer lithium acrylate, acrylamide and lipophilic monomer methyl methacrylate, acrylonitrile in a ratio of 2:1:2 : 5 weight ratio is formed by in-situ copolymerization in butyl rubber emulsion, the weight ratio of the core-shell polymer of the synthesized water-based adhesive is 81: 19, the effective content is 20%, and it is in the state of emulsion.

[0035] The above-mentioned preparation method for the aqueous binder for lithium ion secondary battery is:

[0036] First, dissolve butyl rubber in cyclohexane to make a 15% solution; LiOH is made into a 5% aqueous solution, take a certain amount of stearic acid, and add butyl rubber together with the prepared 5% LiOH solution In the glue soluti...

Embodiment 2

[0038] Embodiment 2 The preparation of lithium ion battery electrode material aqueous binder of the present invention

[0039] The preparation method and operating conditions of the adhesive of this embodiment are basically the same as in Example 1, except that the amount of butyl rubber used as the core of the water-based adhesive latex particles is 60 parts, and the shell polymer is synthesized from the monomer lithium acrylate. , acrylamide, methyl methacrylate, and acrylonitrile are used in 8 parts, 4 parts, 8 parts, and 20 parts respectively, and the obtained water-based adhesive has a core-shell weight ratio of 62:38, an effective content of 15%, and is in the form of an emulsion .

Embodiment 3

[0040] Embodiment 3 The preparation of the lithium ion battery electrode material aqueous binder of the present invention

[0041] The preparation method and operating conditions of the adhesive of this embodiment are basically the same as in Example 2, except that the amount of butyl rubber used as the core of the water-based adhesive latex particle is 4 parts, and the shell polymer is synthesized from the monomer lithium acrylate. , acrylamide, methyl methacrylate, and acrylonitrile are used in amounts of 19.2, 9.6, 19.2, and 48 parts respectively, and the obtained water-based adhesive core-shell weight ratio is 5:95, the effective content is 15%, and it is in the state of emulsion .

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PUM

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Abstract

The present invention relates to an aqueous binder used in lithium ionic cell electric pole material and the preparation method thereof, which belongs to lithium ionic cell electric pole material preparation field. The present invention aims to provide an aqueous binder for producing lithium ionic cell positive and negative plate with adjustable flexibility, and can meet all electric pole material aqueous binder requirements under various conditions of lithium ionic cell production and processing, storage and usage. The aqueouspolymer latex particle emulsion has an inside soft and outside hard core-shell structure with low polar polymer as core and high polar polymer as shell, and the solid content of the emulsion is 5-40 wt%, the mass percentage of low polar polymer is more than 0 and smaller than or equal to 95% in the core-shell structure. The lithium ionic cell produced according to the invention is provided with high capacity exertion of electroactive material, long battery periodic duty life and high voltage of discharge platform.

Description

technical field [0001] The invention relates to a water-based adhesive for lithium-ion battery electrode materials and a preparation method thereof, belonging to the field of preparation of lithium-ion battery electrode materials. Background technique [0002] After more than 20 years of development, lithium-ion batteries have gradually expanded their application range from portable appliances such as mobile phones, laptop computers, video cameras, cameras, word processors, etc. to various large-scale energy supply systems, such as electric vehicles, aerospace, Military, building backup energy systems, etc.; lithium-ion battery positive and negative materials are powdery, including cobalt, nickel, manganese, lithium iron phosphate, cobalt-nickel-manganese ternary materials and other positive active materials and various carbon The plain negative electrode material needs to be mixed with a binder to prepare a slurry, which is coated on the copper foil and aluminum foil as the...

Claims

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Application Information

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IPC IPC(8): C09J151/06C09J151/04C09J151/00H01M4/62H01M4/02H01M4/04
CPCY02E60/12Y02E60/10
Inventor 潘中来张晓正谢了邓正华
Owner MEISHAN INDIGO TECH CO LTD
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