Electrolyte for coating electrode material surface of lithium battery and coating method

A technology of electrode material and coating method, which is applied in the direction of electrolyte layer coating, lithium battery, non-aqueous electrolyte battery, etc., can solve the problem that lithium battery has not been applied, and achieve the effect of promoting application development, good safety, and simple operation

Inactive Publication Date: 2017-01-04
四川赛尔雷新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, lithium batteries have not been used for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An electrolyte and a coating method for coating the surface of a lithium battery electrode material. The raw materials include: 15 parts by weight of lithium bistrifluoromethanesulfonate imide, 0.5 parts by weight of a plasticizer, 0.05 parts by weight of a surfactant, and 0.05 parts by weight of a surfactant. Antioxidant and 0.5 weight part stabilizer, described plasticizer comprises fluorobenzene and ethyl acetate; Coating method:

[0030] (1) In an environment with a water content of ≤2%, evenly coat the front and back sides of the positive electrode sheet with a 50 μm thick positive electrode active material, and evenly coat the front and back sides of the negative electrode sheet with a 50 μm thick negative electrode active material. The speed is 3m / min;

[0031] (2) In an environment with a water content of ≤2%, the electrolyte is evenly coated on the front and back sides of the positive electrode sheet and the negative electrode sheet respectively, with a coating...

Embodiment 2

[0034] An electrolyte and a coating method for coating the surface of a lithium battery electrode material. The raw materials include: 20 parts by weight of lithium bistrifluoromethanesulfonate imide, 15 parts by weight of a plasticizer, 0.5 parts by weight of a surfactant, 0.5 parts by weight of Antioxidant and 3 parts by weight of stabilizing agent, described plasticizer comprises fluorobenzene and ethyl acetate; Coating method:

[0035] (1) In an environment with a water content of ≤2%, evenly coat the front and back sides of the positive electrode sheet with a 70 μm thick positive electrode active material, and evenly coat the front and back sides of the negative electrode sheet with a 70 μm thick negative electrode active material. The speed is 5m / min;

[0036] (2) In an environment with a water content of ≤2%, the electrolyte is evenly coated on the positive and negative sides of the positive and negative electrodes respectively, with a coating thickness of 25 μm, lamina...

Embodiment 3

[0039] An electrolyte and a coating method for coating the surface of a lithium battery electrode material. The raw materials include: 18 parts by weight of lithium bistrifluoromethanesulfonate imide, 12 parts by weight of plasticizer, 0.34 parts by weight of surfactant, 0.28 parts by weight of Antioxidant and 2.6 parts by weight of stabilizing agent, described plasticizer comprises fluorobenzene and ethyl acetate; Coating method:

[0040] (1) In an environment with a water content of ≤2%, evenly coat the front and back sides of the positive electrode sheet with a 60 μm thick positive electrode active material, and evenly coat the front and back sides of the negative electrode sheet with a 60 μm thick negative electrode active material. The speed is 4m / min;

[0041] (2) In an environment with a water content of ≤2%, the electrolyte is evenly coated on the front and back sides of the positive electrode sheet and the negative electrode sheet respectively, with a coating thicknes...

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PUM

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Abstract

The invention relates to the technical field of lithium batteries, in particular to an electrolyte for coating an electrode material surface of the lithium battery and a coating method. The electrolyte comprises the raw materials of lithium trifluoromethanesulfonimide, a plasticizer, a surfactant, an antioxidant and a stabilizer, wherein the plasticizer comprises fluorobenzene and ethyl acetate. The coating method comprises the steps of (1) evenly coating the positive and negative surfaces of a positive pole piece with a positive electrode active material which is 50-70 microns thick and evenly coating the positive and negative surfaces of a negative pole piece with a negative electrode active material which is 50-70 microns thick; (2) evenly coating the positive and negative surfaces of the positive pole piece and the negative pole piece with the electrolyte separately until the coating thickness is 15-25 microns, carrying out lamination and reversely sealing the tops to obtain a naked battery core; and (3) finally carrying out formation treatment on the naked battery core to prepare the lithium battery core. According to the electrolyte and the coating method, electrolyte pollution and liquid leakage are not formed; the throughput yield is 5% higher than that of a conventional electrolyte; meanwhile, the electrolyte provided by the invention is simple in operation, safe and environment-friendly and is of great significance in promotion of application and development of the lithium battery.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to an electrolyte and a coating method for coating the surface of a lithium battery electrode material. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. In 1912, the lithium metal battery was first proposed and studied by Gilbert N. Lewis. In the 1970s, M. S. Whittingham proposed and began to study lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become the mainstream now. [0003] Lithium batteries can be roughly divided into two categories: lithium metal batteries and lith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M10/052H01M10/0567H01M10/058
CPCH01M4/0407H01M10/052H01M10/0567H01M10/058Y02E60/10Y02P70/50
Inventor 杨维元
Owner 四川赛尔雷新能源科技有限公司
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