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Conductive coating material for lithium ion battery, preparation method of conductive coating material and lithium ion battery

A lithium-ion battery and conductive coating technology, applied in conductive coatings, battery electrodes, coatings, etc., can solve problems such as environmental production pollution, impact on slurry stability and primer effect, and threats to the health of operators. Low price, excellent chemical stability, and the effect of improving stability

Active Publication Date: 2016-10-26
宇锵新材料(湖北)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing conductive coating material is nano-scale, and after the slurry is dispersed, the tiny particles are easy to agglomerate to form large particles, which affects the stability of the slurry and the effect of the primer
Moreover, this conductive coating material uses traditional binders. Traditional binders generally use polymeric organic materials and toxic organic solvents, which cause battery production to pollute the environment and pose a threat to the health of operators.

Method used

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  • Conductive coating material for lithium ion battery, preparation method of conductive coating material and lithium ion battery
  • Conductive coating material for lithium ion battery, preparation method of conductive coating material and lithium ion battery
  • Conductive coating material for lithium ion battery, preparation method of conductive coating material and lithium ion battery

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preparation example Construction

[0029] The preparation method of the conductive coating material of the above-mentioned lithium ion battery comprises the following steps: adding the conductive agent and polyvinylpyrrolidone successively to the aqueous dispersion of the acrylonitrile multi-polymer copolymer according to the ratio of each component in the above-mentioned conductive coating material, stirring Afterwards, grinding and dispersing are carried out several times until the dispersion is even, and the conductive coating material of the lithium ion battery is obtained.

[0030] In a preferred situation, the preparation method also includes adding a chelating agent to the binder, stirring and chelating, and dispersing in water, and then adding the conductive agent and polyvinylpyrrolidone sequentially according to the proportion of each component in the conductive coating material , further adding a defoamer and an antiseptic, and after stirring, grinding and dispersing for several times until the disper...

Embodiment 1～7

[0036] (1) Add calcium hydroxide to the binder shown in Table 1 according to the composition and content of the conductive coating material in Table 1, disperse in water after stirring for 24 hours to chelate, and then press the conductive coating in Table 1 Components and content of the layer material Add the conductive agent and polyvinylpyrrolidone sequentially to the aqueous dispersion of the chelated binder, stir for 1 hour (wherein, the stirring line speed is 20m / s), and then pass through the ball mill Grind for 5 times until the dispersion is uniform, and the silver conductive coating material of the lithium ion battery of Examples 1-5 is obtained.

[0037] (2) According to the existing lithium-ion battery manufacturing method, make lithium-ion battery, the difference is that on the positive electrode of lithium-ion battery and the negative electrode current collector, first coat one deck conductive coating material; Obtain the lithium ion of embodiment 1~5 Battery.

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Abstract

The invention provides a conductive coating material for a lithium ion battery. The conductive coating material comprises components in parts by weight as follows: 100 parts of a conductive agent, 20-150 parts of a binding agent, 0-30 parts of polyvinylpyrrolidone and 500-10,000 parts of water, wherein in terms of 100 parts by weight of the conductive agent, the conductive coating material further comprises components of 70-100 parts by weight of conductive carbon black and 0-30 parts by weight of carbon nano-tubes. The invention further provides a preparation method of the conductive coating material and the lithium ion battery adopting the conductive coating material. The conductive coating material is safe and environment-friendly, has good stability after dispersed and can improve the electrochemical performance of the lithium ion battery remarkably.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, and more specifically, to a conductive coating material for a lithium-ion battery, a preparation method thereof, and a lithium-ion battery. Background technique [0002] With the rapid development of the battery field, people have higher and higher requirements for various power sources. Among them, lithium-ion batteries are widely used for their high voltage, light weight, no memory effect, long cycle life and no environmental pollution. use. As a chemical power source, a lithium-ion battery mainly includes: a battery case, a pole core sealed in the battery case, and a non-aqueous electrolyte; wherein, the pole core includes a battery positive pole, a negative pole and a diaphragm, and the positive pole is generally made of aluminum foil , the negative electrode is made of copper foil. [0003] At present, with the development of new energy technologies, the demand for lithium-ion power ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/20C09D133/04C09D101/28C09D109/06C09D139/06C09D5/24H01M4/62H01M10/0525
CPCC08K3/04C08K3/22C08K7/24C08K2003/2206C08K2201/011C08L2203/20C08L2205/03C09D5/24C09D101/286C09D109/06C09D133/04C09D133/20C09D7/65H01M4/625H01M10/0525C08L39/06C08L9/06C08L1/286Y02E60/10
Inventor 李科费伟征
Owner 宇锵新材料(湖北)有限公司
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