Lithium ion battery cathode, preparation method thereof and lithium ion battery applying the same

Abstract

The invention relates to a lithium ion battery cathode, a preparation method thereof and a lithium ion battery using the lithium ion battery cathode. The lithium ion battery cathode comprises a carbon nanotube film which comprises interwound carbon nanotubes. The preparation method of the lithium ion battery cathode comprises the following steps: providing a carbon nanotube raw material; adding the carbon nanotube raw material to a solvent and flocculating the raw material and the solvent to obtain a carbon nanotube flocculent structure; and separating the carbon nanotube flocculent structure from the solvent and sizing the carbon nanotubes to obtain the carbon nanotube film, thus obtaining the lithium ion battery cathode. The lithium ion battery comprises a shell, and an anode, a cathode, electrolyte and a separator which are arranged in the shell, wherein, the separator is arranged between the anode and the cathode, and divides the inner space of the shell into two parts, a spacing is kept among the anode, the cathode and the separator, the electrolyte is arranged in the shell, and the anode and the cathode are arranged in the electrolyte. In the lithium ion battery, the cathode is the lithium ion battery cathode prepared by the method.

Description

technical field [0001] The present invention relates to a negative electrode of a lithium ion battery and a preparation method thereof, and a lithium ion battery using the negative electrode of the lithium ion battery, in particular to a negative electrode of a lithium ion battery based on carbon nanotubes, a preparation method thereof, and a lithium ion battery using the negative electrode of the lithium ion battery 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] Traditional lithium-ion batteries usually include four parts: positive electrode, negative electrode, separator and ...

AI Technical Summary

Problems solved by technology

Due to the influence of the binder, the surface microporous structure of carbon nanotubes cannot be fully utilized, which limits the adsorption capacity of the negative electrode for lithium ions

Moreover, the lithium ion battery using this negative electrode also has the disadvantages of low initial charge and discharge efficiency, poor cycle performance, and high selectivity to the electrolyte.

[0008] Therefore, it is really necessary to provide a lithium-ion battery negative pole and a preparation method thereof and a lithium-ion battery using the lithium-ion battery negative pole. The lithium-ion battery using the lithium-ion battery negative pole has high charge and discharge efficiency, good cycle performance, and Not very selective for electrolyte

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