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Metal foil treatment process, electrode plate and electrochemical device

A treatment process and electrode pole piece technology, applied in electrochemical generators, electrode carriers/collectors, battery electrodes, etc., can solve problems that affect the use of metal foil, unfavorable health of workers, and metal foil odor, etc., to reduce the impact , eliminate odor, stabilize surface tension effect

Pending Publication Date: 2021-03-19
NINGDE AMPEREX TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the treated metal foil often has a serious odor, which affects the use of the metal foil and is not conducive to the health of the workers

Method used

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  • Metal foil treatment process, electrode plate and electrochemical device
  • Metal foil treatment process, electrode plate and electrochemical device
  • Metal foil treatment process, electrode plate and electrochemical device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] The aluminum foil is transported into the plasma treatment chamber by means of a conveyor belt for plasma treatment, and then rolled into rolls. Wherein, the plasma emission source is 2 cm away from the surface of the aluminum foil, the power of the plasma treatment is 55 kW, and the conveying speed of the aluminum foil is 120 m / min. Put the plasma-treated aluminum foil roll in a baking oven, let it stand still and raise the temperature from room temperature to 120 °C at a heating rate of 5 °C / min and keep it warm for 20 minutes, then take it out and naturally cool it to room temperature in the air. Aluminum foil is odorless and scratch-free.

[0097] Lithium-ion battery preparation: the difference from Comparative Example 1 is that the aluminum foil in Comparative Example 1 is replaced by the aluminum foil prepared in Example 1.

Embodiment 2

[0099] The aluminum foil is transported into the plasma treatment chamber by means of a conveyor belt for two plasma treatments, and then rolled into rolls. Wherein, each time the plasma emission source is 2cm away from the surface of the aluminum foil, the power of each plasma treatment is 50kW, and the transmission speed of each aluminum foil is 160m / min. Put the plasma-treated aluminum foil roll in a baking oven, let it stand still and raise the temperature from room temperature to 90 °C at a heating rate of 3 °C / min and keep it warm for 30 min, then take it out and naturally cool it to room temperature in the air, wherein, the cooled Aluminum foil is odorless and scratch-free.

[0100] Lithium-ion battery preparation: the difference from Comparative Example 1 is that the aluminum foil in Comparative Example 1 is replaced by the aluminum foil prepared in Example 2.

Embodiment 3

[0102] The aluminum foil is transported into the plasma treatment chamber by means of a conveyor belt for plasma treatment, and then rolled into rolls. Wherein, the plasma emission source is 2 cm away from the surface of the aluminum foil, the power of the plasma treatment is 50 kW, and the conveying speed of the aluminum foil is 120 m / min. Put the plasma-treated aluminum foil roll in a baking oven, let it stand still and raise the temperature from room temperature to 80 °C at a heating rate of 3 °C / min and keep it warm for 90 min, then take it out and naturally cool it to room temperature in the air, wherein, the cooled Aluminum foil is odorless and scratch-free.

[0103] Lithium-ion battery preparation: the difference from Comparative Example 1 is that the aluminum foil in Comparative Example 1 is replaced by the aluminum foil prepared in Example 3.

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Abstract

The invention provides a metal foil treatment process. The metal foil treatment process comprises the following steps: carrying out plasma treatment on the surface of a metal foil; rolling the metal foil having been subjected to the plasma treatment into a roll shape, and baking the roll-shaped metal foil; and cooling the roll-shaped metal foil. According to the metal foil treatment process, peculiar smell caused by plasma treatment can be removed. The invention further provides an electrode plate and an electrochemical device.

Description

technical field [0001] The application relates to a metal foil treatment process, an electrode pole piece and an electrochemical device. Background technique [0002] Lithium-ion batteries have the advantages of large specific energy, high working voltage, low self-discharge rate, small size, light weight, etc., and have a wide range of applications in the field of consumer electronics. Wherein, in order to increase the surface tension of the current collector metal foil in the lithium ion battery to facilitate the spreading of the slurry (such as active material), plasma treatment (such as corona) is usually performed on the surface of the current collector metal foil. However, the treated metal foil often has a serious odor, which affects the use of the metal foil and is not conducive to the health of workers. Contents of the invention [0003] In view of the above, it is necessary to provide a treatment process for eliminating the peculiar smell caused by plasma treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/13H01M10/0525
CPCH01M4/661H01M4/13H01M10/0525Y02E60/10
Inventor 刘晓欠王可飞刘胜奇张青文
Owner NINGDE AMPEREX TECH
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