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Preparation method for negative electrode of lithium ion battery

A lithium-ion battery and negative electrode technology, which is applied in the field of preparation of lithium-ion battery negative electrodes, can solve the problems of affecting charge and discharge performance, uneven conductivity, and difficulty in uniform distribution of conductive particles, and achieve good charge and discharge performance.

Inactive Publication Date: 2014-02-19
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lithium-ion battery electrode prepared by this method is difficult to evenly distribute the conductive particles in the electrode, making its conductivity uneven, which in turn affects its charge and discharge performance.

Method used

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  • Preparation method for negative electrode of lithium ion battery
  • Preparation method for negative electrode of lithium ion battery
  • Preparation method for negative electrode of lithium ion battery

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Embodiment Construction

[0017] See figure 1 , The first embodiment of the present invention provides a method for preparing a negative electrode of a lithium ion battery. The preparation method of the lithium ion battery negative electrode includes the following steps: (S10), providing a carbon nanotube film structure; (S11), providing a negative electrode active material solution; (S12), spraying the negative electrode active material solution on the Forming a lithium-ion battery negative electrode preform on the surface of the carbon nanotube film-like structure; and (S13), performing heat treatment on the lithium-ion battery negative electrode preform.

[0018] Step S10, providing a carbon nanotube film structure.

[0019] The carbon nanotube film-like structure is a self-supporting structure. The self-supporting means that the carbon nanotube membranous structure does not need a large-area carrier support, but as long as the supporting force is provided on both sides, it can be suspended as a w...

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Abstract

The invention relates to a preparation method for a negative electrode of a lithium ion battery. The preparation method comprises the steps of providing a carbon nanotube membrane structure; providing a Co(NO3)2 solution; providing an organic solvent; mixing the organic solvent with the Co(NO3)2 solution to form a solution of negative electrode active materials; spraying the solution of the negative electrode active materials on the surface of the carbon nanotube membrane structure to form a negative electrode preform of the lithium ion battery; and performing heat treatment on the negative electrode preform of the lithium ion battery.

Description

technical field [0001] The invention relates to a preparation method of a negative pole of a lithium ion battery. Background technique [0002] Lithium-ion battery is a new type of green chemical power source. Compared with traditional nickel-cadmium batteries and nickel-hydrogen batteries, it has the advantages of high voltage, long life, and high energy density. Since Japan's Sony Corporation launched the first generation of lithium-ion batteries in 1990, it has developed rapidly and is widely used in various portable devices. [0003] The negative electrode material of the existing lithium-ion battery is usually formed by mixing the electrode active material, conductive particles and binder to form a slurry, which is then pressed into shape and further dried. The lithium-ion battery electrode prepared by this method is difficult to evenly distribute the conductive particles in the electrode, making its conductivity uneven, which in turn affects its charge and discharge p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58B82Y30/00B82Y40/00
CPCH01M4/0471H01M4/1397H01M4/663H01M10/052H01M4/0402B82Y40/00H01M4/0419H01M4/0404B82Y30/00H01M4/1391H01M4/131H01M4/523H01M4/625Y10T29/49115Y02E60/10
Inventor 何性峰吴扬王佳平姜开利范守善
Owner TSINGHUA UNIV