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Preparation method of lithium ion battery negative electrode and related device

A lithium-ion battery, negative electrode technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, negative electrodes, etc., can solve the problems of many copper foils and separators, low charging and discharging efficiency, and small reaction area, etc., to improve the heat dissipation effect, Improve energy density and ensure the effect of transmission path

Inactive Publication Date: 2021-10-12
长春交大高能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem that the present invention needs to solve is how to provide a kind of preparation method of lithium-ion battery negative pole, to solve existing lithium-ion battery negative pole to have slow heat dissipation, less reaction area with electrolyte, need to use more copper foil and diaphragm, And the problem of low charge and discharge efficiency

Method used

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  • Preparation method of lithium ion battery negative electrode and related device

Examples

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Comparison scheme
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Embodiment 1

[0025] The embodiment of the present invention provides a kind of preparation method of lithium-ion battery negative electrode, as attached figure 1 shown, including steps:

[0026] S101. Inject the configured conductive paste into a 3D printer, where the conductive paste includes carbon powder, a binder, glycerin and a conductive agent.

[0027] Specifically, the 3D printer is an existing device and will not be further described here.

[0028] Specifically, the composition percentage of the conductive paste is: the carbon powder (graphite powder) 70% to 85%, the binder 5% to 10%, the glycerin 5% to 10%, the conductive agent 5% to 10%. Of course, according to actual needs, the conductive paste can also be properly adjusted, and the components of the conductive paste can be added with other components, or the existing conductive paste formula can be used.

[0029] S102, sequentially printing several grid-shaped electrode layers by the 3D printer.

[0030] Specifically, the ...

Embodiment 2

[0042] The embodiment of the present invention provides a lithium ion battery negative electrode, such as the attached figure 1 As shown, the negative electrode of the lithium ion battery is prepared by the preparation method of the negative electrode of the lithium ion battery described in Example 1.

[0043] Compared with the prior art, the lithium-ion battery negative electrode in this example is prepared by the preparation method of the lithium-ion battery negative electrode described in Example 1, so that the porous structure of the electrode layer can buffer its inner cavity for long-term charging and discharging. The volume expansion caused by the heat generated in the cycle, and the heat generated by charging and discharging can be quickly transferred to the battery shell with the porous structure to improve the heat dissipation effect, which is beneficial to the safety performance of the battery, and can also make it have too much The area reacts with the electrolyte ...

Embodiment 3

[0045] The embodiment of the present invention provides a lithium ion battery, such as the attached figure 1 As shown, the lithium ion battery negative electrode described in the second embodiment is included.

[0046]Compared with the prior art, the lithium-ion battery in this embodiment uses the negative electrode of the lithium-ion battery in Embodiment 2, so that the porous structure of the electrode layer can buffer the heat generated by the inner cavity during the long-term charge-discharge cycle. The resulting volume expansion, and the heat generated by charging and discharging can be quickly transferred to the battery shell with the porous structure to improve the heat dissipation effect, which is beneficial to the safety performance of the battery, and can also make it have too much area to react with the electrolyte. Improve energy density and ensure a smooth transmission path for electrons to improve charge and discharge efficiency, and because no current collector ...

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Abstract

The invention provides a preparation method of a lithium ion battery negative electrode, the lithium ion battery negative electrode and a lithium ion battery, wherein the preparation method of the lithium ion battery negative electrode comprises the following steps of injecting the prepared conductive paste into a 3D printer,wherein the conductive paste comprises carbon powder, a binder, glycerin and a conductive agent; printing a plurality of latticed electrode layers sequentially through the 3D printer; and sequentially superposing the plurality of electrode layers to obtain the lithium ion battery negative electrode. According to the invention, through the porous structure of the electrode layers, the volume expansion of an inner cavity caused by the heat generated during long-term charge-discharge circulation can be buffered, and the heat generated by the charge-discharge can be quickly transferred to a battery shell along with the porous structure, so that the safety performance of the battery is facilitated; the battery can have excessive area to react with electrolyte, so that the energy density is increased, and the charge and discharge efficiency is improved; and moreover, a current collector is not required to be arranged, so that the use of copper foils and diaphragms is also reduced.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a preparation method of a negative pole of a lithium ion battery, a negative pole of a lithium ion battery and a lithium ion battery. Background technique [0002] Lithium-ion battery is a rechargeable battery, usually used in portable electronic equipment and electric equipment, etc., the discharge process is to move from the negative electrode to the positive electrode, while the charging process is the opposite. [0003] Lithium-ion batteries mainly include battery case, positive electrode, negative electrode, diaphragm, electrolyte, etc. Among them, the existing lithium-ion battery negative electrode has many problems, such as slow heat dissipation, small reaction area with electrolyte, copper foil and There are many separators, and the charge and discharge efficiency is low. Contents of the invention [0004] The technical problem that the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/13H01M10/0525H01M10/613H01M10/654
CPCH01M4/139H01M4/13H01M10/0525H01M10/613H01M10/654H01M2004/027H01M2004/021Y02E60/10
Inventor 王世明詹云卫莱薛楼窦旭琰
Owner 长春交大高能科技有限公司
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