Composite pole plate of lithium ion battery and preparation method of composite pole plate

A lithium-ion battery and pole piece technology, which is used in electrode manufacturing, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of poor safety performance and difficult consistency of lithium-ion batteries.

Pending Publication Date: 2016-06-01
FOSHAN CITY XINYUAN ELECTRONICS CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The invention discloses a lithium-ion battery composite pole piece and a preparation method thereof, which not only solves the defects of current lithium-ion batteries such as poor safety performance

Method used

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Embodiment Construction

[0020] A lithium-ion battery composite pole piece and a preparation method thereof, wherein a current collector layer is provided in the middle of the composite pole piece, an undercoat layer is provided on the upper and lower sides of the current collector layer, and an active layer is provided on the outside of the two undercoat layers. The outer surfaces of the material layer and the active material layer are respectively provided with sprayed layers.

[0021] The current collector layer is made of mesh copper foil or mesh aluminum foil;

[0022] Described primer layer is made up of binder 35%, carbon nanotube 25%, graphene 40%;

[0023] The active material layer is composed of 35% lithium iron phosphate, 18% binder, and 47% carbon black conductive agent;

[0024] Described spray coating is made up of lithium metaaluminate 38%, binding agent 22%, carbon black conductive agent 40%;

[0025] The binder is polyacrylate terpolymer latex 22%, polyvinylidene fluoride 11%, LiO6 ...

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Abstract

The invention relates to a composite pole plate of a lithium ion battery and a preparation method of the composite electrode, relating to the field of battery preparation, and in particular to the field of preparation of the lithium ion battery. The composite pole plate is characterized in that a current collector layer is arranged at the middle of the composite pole plate, a base coating layer is arranged on each of the upper surface and the lower surface of the current collector layer, an active substance layer is arranged on each of the outer surfaces of the base coating layers on the two surfaces, and a spraying layer is arranged on each of the outer surfaces of the active substance layers. By the composite pole plate, the defects such as poor safety performance and difficulty in consistency control of the lithium ion battery are overcome, and the lithium-ion composite pole plate has the advantages of simplicity in preparation, high consistency and high safety and is also applied to the lithium ion battery.

Description

technical field [0001] The invention relates to the field of battery preparation, in particular to the field of lithium ion battery preparation. Background technique [0002] Lithium-ion battery is a new type of energy storage battery developed in recent years. It is favored by the market due to its good cycle life, environmental friendliness, and reasonable price. It is widely used in communication electronics, electric vehicles and other fields. The safety performance is the key to its wide application and promotion. At present, the safety performance of lithium-ion batteries is mainly improved by selecting functional electrolytes, ceramic diaphragms, and safe positive and negative electrode materials in China. For example, the patent (CN201410417508 .1) A high-safety lithium-ion battery negative pole piece, its preparation method and its application, mainly by coating the isolation layer to avoid the contact probability of the active material and the electrolyte, and impr...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/04H01M10/0525
CPCH01M4/0402H01M4/0419H01M4/13H01M10/0525Y02E60/10
Inventor 薛永谢志懋
Owner FOSHAN CITY XINYUAN ELECTRONICS CO LTD
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