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Lithium ion battery positive plate, preparation method thereof and lithium ion battery

A lithium-ion battery and positive electrode technology, which is applied to battery electrodes, positive electrodes, secondary batteries, etc., can solve the problem of low surface density of positive electrodes, achieve the effects of increased surface density, enhanced conductivity, and reduced processing difficulty

Pending Publication Date: 2022-04-15
TIANJIN ENERGIES
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, when preparing lithium-ion batteries, the prepared positive electrode slurry is coated on the positive electrode current collector at one time, and the surface density of the formed positive electrode sheet is low.

Method used

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  • Lithium ion battery positive plate, preparation method thereof and lithium ion battery
  • Lithium ion battery positive plate, preparation method thereof and lithium ion battery
  • Lithium ion battery positive plate, preparation method thereof and lithium ion battery

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0036] figure 1 It is a flow chart of a method for preparing a positive electrode sheet of a lithium-ion battery provided by an embodiment of the present invention, see figure 1 , the preparation method of lithium-ion battery cathode sheet comprises:

[0037] S110, preparing positive electrode slurry by using positive electrode active material, conductive agent and binder.

[0038] Specifically, the positive electrode active material is, for example, lithium iron phosphate (LiFePO 4 ), lithium iron phosphate ha...

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Abstract

The invention discloses a preparation method of a lithium ion battery positive plate, the positive plate and a battery. The preparation method of the lithium ion battery positive plate comprises the following steps: preparing positive slurry from a positive active material, a conductive agent and a binder; coating part of the positive electrode slurry on the surface of a positive electrode current collector to form a first positive electrode coating; coating the rest part of the positive electrode slurry on the surface of the first positive electrode coating to form a second positive electrode coating, and forming a positive plate by the positive electrode current collector, the first positive electrode coating and the second positive electrode coating; wherein the surface density of the first positive electrode coating is greater than a first preset value. According to the technical scheme, the effect of increasing the density of the positive electrode surface of the lithium ion battery is achieved, and the purpose of improving the energy density of the lithium ion battery is achieved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of lithium-ion batteries, and in particular to a lithium-ion battery positive plate, a preparation method thereof, and a lithium-ion battery. Background technique [0002] With the rapid development of electric vehicles, the requirements for battery life of electric vehicles are getting higher and higher. The main way to improve the battery life of electric vehicles is to increase the energy density of lithium-ion batteries. An important way to improve the energy density of lithium-ion batteries is to design High areal density positive electrode. [0003] At present, when preparing lithium-ion batteries, the prepared positive electrode slurry is coated on the positive electrode current collector at one time, and the surface density of the formed positive electrode sheet is relatively low. Contents of the invention [0004] The invention provides a lithium-ion battery positive pla...

Claims

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Application Information

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IPC IPC(8): H01M4/1397H01M4/136H01M4/36H01M4/58H01M10/0525
CPCH01M4/1397H01M4/136H01M4/366H01M4/5825H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 孟瑜何爱勤高秀玲马华
Owner TIANJIN ENERGIES
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