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Lithium ion battery negative electrode slurry and lithium ion battery

A lithium-ion battery and negative electrode slurry technology, which is applied to battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of easy reduction of lithium-ion battery charge and discharge performance and use safety, the impact of battery volume specific capacity, Problems such as charging efficiency and speed, to achieve the effect of maintaining stability, ensuring basic performance, and reducing usage

Pending Publication Date: 2018-09-14
江西迪芯能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the industrial production of lithium-ion batteries, in order to meet the needs of mass production, the electrode slurry generally needs to stay on the production line for a long time after configuration, generally 6-24 hours. Therefore, in order to ensure the stability of the slurry, Generally, a thickener is added to maintain the stability of the slurry, and the addition of too much thickener will affect the volume specific capacity of the battery
[0004] To ensure the volume specific capacity of the battery, it is easy to reduce the charging and discharging performance of the lithium-ion battery and the use safety problem. The use safety problem is usually thermal runaway. When the battery temperature continues to rise, it is accompanied by a large amount of flammable gas production, which causes unsafe accidents; Discharge performance is generally expressed as the speed of charging efficiency

Method used

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  • Lithium ion battery negative electrode slurry and lithium ion battery
  • Lithium ion battery negative electrode slurry and lithium ion battery
  • Lithium ion battery negative electrode slurry and lithium ion battery

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preparation example Construction

[0027] Although the preparation of lithium ion battery cathode slurry, the selection of positive and negative current collectors, electrolyte formula, diaphragm selection, and battery assembly are quite important, they are not relevant based on the present invention and can be carried out according to the prior art The selection will not be described in detail here, and the corresponding lithium ion negative electrode slurry will be described below.

[0028] The technical scheme of the lithium ion battery negative electrode slurry will be further described below through specific implementation methods.

Embodiment 1

[0030] A negative electrode slurry for a lithium ion battery is provided in Embodiment 1,

[0031] Preparation of lithium ion battery negative electrode sheet:

[0032] 3868 grams of artificial graphite, 6 grams of CMC with a molecular weight of 400,000, 6 grams of PAC with a molecular weight of 400,000, 160 grams of 50% SBR emulsion, 2830 grams of deionized water, 25.2 grams of acetylene black, 9.6 grams of carbon nanotubes, and 5.2 grams of carbon fiber VGCF, 56g of triphenyl phosphate and 14g of tetrabromophthalic anhydride were mixed and stirred evenly to obtain negative electrode slurry A1.

[0033] Coat the negative electrode slurry A1 obtained in the previous step on a copper foil with a thickness of 9um, dry at 90°C, press into sheets, and then cut into negative electrode sheets of length×width×thickness=84mm×59mm×0.11mm , Each negative electrode contains 0.86 grams of artificial graphite.

[0034] Preparation of positive electrode sheet of lithium ion battery: 3868 ...

Embodiment 2

[0038] A negative electrode slurry for a lithium ion battery is provided in Embodiment 2,

[0039] Preparation of lithium ion battery negative electrode sheet:

[0040] 3868 grams of artificial graphite, 6 grams of CMC with a molecular weight of 400,000, 6 grams of polyacrylic acid with a molecular weight of 30 million, 160 grams of SBR emulsion with a concentration of 50%, 2830 grams of deionized water, 25.2 grams of acetylene black, 9.6 grams of carbon nanotubes, 5.2 grams Carbon fiber VGCF, 48.9g of triphenyl phosphate and 20.9g of tetrabromophthalic anhydride were mixed and stirred evenly to obtain negative electrode slurry A2. Others are the same as embodiment one.

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Abstract

The invention discloses lithium ion battery negative electrode slurry, and belongs to the technical field of a lithium ion battery. The lithium ion battery negative electrode slurry is prepared from negative electrode active substances, bonding agents, conductive agents, deionized water, thickening agents and fire retardants, and can be used for making the lithium ion battery capable of maintaining the basic performance and simultaneously improving the volume specific capacity. The invention also discloses the lithium ion battery, which belongs to the technical field of the lithium ion battery. The lithium ion battery comprises a casing, an electrode group and electrolyte. A rubber ring of the lithium ion battery can reduce the damage due to collision during the battery falling; the pressure resistant capability of the side wall of the lithium ion battery can be improved; meanwhile, the contact during the use of the battery is more convenient; the condition of poor contact in the use process of the battery is reduced; the placement is convenient.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, and more specifically relates to a negative electrode slurry of a lithium ion battery and a lithium ion battery. Background technique [0002] Lithium-ion batteries are widely used in electric vehicles and grid energy storage fields. Lithium-ion batteries have the advantages of wide operating temperature range, stable discharge voltage, low self-discharge rate, and long service life. They have been widely used in various fields, especially It is suitable for aerospace, military, longevity instrumentation, logistics tracking, automotive electronics, mobile digital products and other fields. In recent years, with the continuous development of science and technology, the functions of electronic equipment have been continuously upgraded, so higher requirements have been placed on the production process of lithium batteries, and it has become a key research direction in the battery indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/62H01M10/0525
CPCH01M4/13H01M4/62H01M10/0525Y02E60/10
Inventor 聂志明李文
Owner 江西迪芯能源科技有限公司
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