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

A lithium-ion battery and negative electrode technology, which is applied in the field of carbon nanotube-based lithium-ion battery negative electrode and its preparation, can solve the problems of poor cycle performance, limited adsorption capacity, good cycle performance, etc., achieve excellent electrical conductivity, and improve stability. , the effect of increasing the amount of embedding

Inactive Publication Date: 2009-04-15
TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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preparation example Construction

[0038] see figure 2 The embodiment of the technical solution further provides a method for preparing a negative electrode of a lithium-ion battery, which specifically includes the following steps:

[0039] Step 1, providing a carbon nanotube raw material. The obtaining of carbon nanotube raw material comprises the following steps:

[0040] First, a carbon nanotube array is provided.

[0041] In this embodiment, the preparation method of the carbon nanotube array adopts the chemical vapor deposition method, and the specific steps include: (a) providing a flat substrate, which can be a P-type or N-type silicon substrate, or a silicon substrate with an oxide layer formed on it. Silicon substrate, the present embodiment preferably adopts a 4-inch silicon substrate; (b) uniformly form a catalyst layer on the surface of the substrate, and the catalyst layer material can be selected from iron (Fe), cobalt (Co), nickel (Ni) or any of them One of the combined alloys; (c) annealing ...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/04C01B31/02H01M10/40H01M4/133H01M4/1393H01M4/58H01M4/587H01M10/052H01M10/0525H01M10/0568H01M10/0569H01M10/36
CPCH01M4/133H01M10/0568H01M4/1393Y02E60/122H01M4/587H01M10/052H01M10/0569H01M10/0525Y02E60/10
Inventor 刘长洪范守善
Owner TSINGHUA UNIV
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