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Method for reducing number of bubbles in process of coating slurry on surface of battery pole piece and application of method in solid electrolyte coating

A technology of solid electrolyte and battery pole piece, which is applied in the direction of surface coating liquid device, battery electrode, electrolyte battery manufacturing, etc. It can solve problems such as air bubbles, achieve faster coating speed, eliminate air bubbles, and solve the effects of air bubbles

Pending Publication Date: 2020-09-15
宜春清陶能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a method for reducing the amount of air bubbles in the process of coating the slurry on the surface of the battery pole piece and its application in solid electrolyte coating, which can solve the problem of the prior art on the battery. The problem of air bubbles when the pole piece is coated with solid electrolyte

Method used

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  • Method for reducing number of bubbles in process of coating slurry on surface of battery pole piece and application of method in solid electrolyte coating
  • Method for reducing number of bubbles in process of coating slurry on surface of battery pole piece and application of method in solid electrolyte coating
  • Method for reducing number of bubbles in process of coating slurry on surface of battery pole piece and application of method in solid electrolyte coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This embodiment provides a kind of coating machine (structural schematic diagram sees figure 2 ), the coating machine includes an unwinding device, a pole piece processing device, a first drying device, a coating device, a second drying device and a winding device connected in sequence, and the pole piece processing device is an ultrasonic atomizer A , the ultrasonic atomizer A includes an ultrasonic device E, the first drying device B is a blast oven, and the second drying device D is a blast oven.

[0058] The battery pole piece is driven by a round roller on the coating machine, and when the battery pole piece passes through device A (that is, the ultrasonic atomizer), as image 3 As shown, the solvent in the device A forms an atomized state solvent 16 under the action of the ultrasonic generator E, and the atomized state solvent 16 easily penetrates into the gap between the active materials of the battery pole pieces, and between the active materials of the battery...

Embodiment 2

[0066] The difference from Example 1 is that in this example, the ultrasonic power is 10KW, the temperature of the first drying device is 20°C, the wind speed is 1m / s, and the coating speed is 1m / min.

Embodiment 3

[0068] The difference from Example 1 is that in this example, the ultrasonic power is 15KW, the temperature of the first drying device is 100°C, the wind speed is 10m / s, and the coating speed is 40m / s.

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Abstract

The invention discloses a method for reducing the number of bubbles in the process of coating slurry on the surface of a battery pole piece and application of the method in solid electrolyte coating.The method comprises the step of infiltrating the battery pole piece with a solvent before coating the slurry on the surface of the battery pole piece. According to the method disclosed by the invention, the battery pole piece is infiltrated by using the solvent in advance before the battery pole piece is coated with the solid electrolyte, so that bubbles can be well eliminated, and the problem that bubbles are generated when the battery pole piece is coated with slurry such as solid electrolyte slurry in the prior art is solved.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to the field of solid electrolyte coating, in particular to a method for reducing the amount of air bubbles in the process of coating slurry on the surface of battery pole pieces and its application in solid electrolyte coating. Background technique [0002] A solid-state battery generally includes a positive electrode, a negative electrode, and a solid electrolyte. The solid electrolyte can not only conduct lithium ions but also act as a separator. Since the electrolyte is solid, it avoids or greatly reduces the use of organic liquid electrolytes in traditional batteries, reduces leakage, corrosion, flammability and explosion problems, and has high safety and great development potential. [0003] In the existing solid-state battery preparation process, a coating machine is generally used to coat the solid electrolyte slurry on the positive electrode or the negative electrode to re...

Claims

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Application Information

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IPC IPC(8): H01M4/139H01M4/04H01M10/058H01M10/0525B05C9/14B05D1/02B05D3/04B05D7/00
CPCH01M4/139H01M4/0402H01M10/058H01M10/0525B05D7/00B05D1/02B05C9/14B05D3/0413Y02E60/10Y02P70/50
Inventor 李峥冯玉川蒲万锦何泓材杨帆
Owner 宜春清陶能源科技有限公司