Lithium battery negative electrode, preparation method thereof and lithium battery

A technology of lithium battery and negative electrode, which is applied in the field of lithium battery, lithium battery negative electrode and its preparation, can solve the problems of rapid power decay of lithium battery, and achieve the effect of high power level

Pending Publication Date: 2022-04-12
柯良节
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a lithium battery negative electrode and a preparation method thereof, and a lithium battery, aiming at solving the problem of rapid power decay of the existing lithium battery

Method used

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  • Lithium battery negative electrode, preparation method thereof and lithium battery
  • Lithium battery negative electrode, preparation method thereof and lithium battery
  • Lithium battery negative electrode, preparation method thereof and lithium battery

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preparation example Construction

[0030] Based on this, the invention provides a kind of preparation method of lithium battery negative electrode, such as image 3 As shown, it includes the steps:

[0031] S10, providing lithium carbide particles;

[0032] S20, mixing the lithium carbide particles and graphene in a binder solution to obtain a mixed solution;

[0033] S30, coating the mixed solution on the metal sheet to form a coating;

[0034] S40. Coating the negative electrode material of the lithium battery on the coating to obtain the negative electrode of the lithium battery.

[0035] In the present invention, by providing a layer of coating between the metal sheet and the negative electrode material of the lithium battery, the coating includes lithium carbide particles and graphene, which is equivalent to pre-stored part of lithium ions in the negative electrode. During the charging process of the negative electrode of the lithium battery, due to the generation of a large number of electrons, the lit...

Embodiment 1

[0046] A kind of preparation of lithium ion battery:

[0047] The lithium carbide particles and graphene are mixed in an aqueous acrylic resin solution according to a mass ratio of 1:99 to obtain a mixed solution; the mixed solution is coated on a metal sheet to form a coating; coating on the coating Lithium metal, making lithium battery negative electrode;

[0048] The negative electrode of the lithium battery and the positive electrode LiCoO 2 Set on the left and right sides of the diaphragm, and add 1M LiPF6 EC / DEC solution as the electrolyte, and assemble it into a CR2032 button battery.

Embodiment 2

[0050] A kind of preparation of lithium ion battery

[0051] The lithium carbide particles and graphene are mixed in an aqueous acrylic resin solution according to a mass ratio of 20:99 to obtain a mixed solution; the mixed solution is coated on a metal sheet to form a coating; coating on the coating Lithium metal, making lithium battery negative electrode;

[0052] The negative electrode of the lithium battery and the positive electrode LiCoO 2 Set on the left and right sides of the diaphragm, and add 1M LiPF6 EC / DEC solution as the electrolyte, and assemble it into a CR2032 button battery.

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Abstract

The invention provides a lithium battery negative electrode, a preparation method thereof and a lithium battery, and the preparation method comprises the following steps: providing lithium carbide particles; mixing the lithium carbide particles and graphene in a binder solution to obtain a mixed solution; coating a metal sheet with the mixed solution to form a coating; and coating the coating with a lithium battery negative electrode material to prepare the lithium battery negative electrode. The coating is arranged between the metal sheet and the lithium battery negative electrode material and comprises the lithium carbide particles and the graphene, and equivalently, part of lithium ions are pre-stored in the negative electrode. In the charging process of the negative electrode of the lithium battery, because a large number of electrons are generated, lithium carbide in the coating is easily split into carbon and lithium ions, so that part of lithium ions lost due to crystallization can be effectively supplemented, and the lithium ion battery can keep a high electric quantity level for a longer time.

Description

technical field [0001] The invention relates to the technical field of battery electrodes, in particular to a negative electrode of a lithium battery, a preparation method thereof, and a lithium battery. [0002] technical background [0003] When preparing the two electrodes of a battery product, the metal sheets are generally coated with polar materials, bonded together with an adhesive, and then the two electrodes of the battery are produced by connecting the metal sheets with wires. In order to increase the conductivity of the electrode, before coating the polar material on the metal sheet, a layer of conductive material with relatively strong conductivity and much smaller particles than the electrode material will be pre-coated on the metal sheet to form a pre-coating Floor. [0004] However, lithium batteries will encounter the problem of battery power attenuation during long-term use. This is usually due to the formation of lithium crystals in the process of lithium i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/1393H01M10/052
CPCY02E60/10
Inventor 柯良节伍连彬
Owner 柯良节
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