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Preparation method of lithium ion battery anode

A lithium-ion battery and anode technology, which is applied in the direction of electrode manufacturing, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve problems such as hindering transition metal oxide anodes, low conductivity of transition metal oxides, and deterioration of lithium-ion batteries. Achieve the effects of being suitable for large-scale preparation, improving conductivity and reactivity, and making the preparation method simple and easy

Active Publication Date: 2021-12-03
TSINGHUA UNIV +1
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Problems solved by technology

[0004] However, there are still two major defects that hinder the practical application of transition metal oxide anodes: first, the volume of transition metal oxides will expand to a large extent during the discharge and charge process, causing serious damage to lithium-ion batteries. Deterioration; Second, transition metal oxides have inherently low electrical conductivity, and lithium-ion battery anodes composed of transition metal oxides seriously hinder the reactivity

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  • Preparation method of lithium ion battery anode
  • Preparation method of lithium ion battery anode
  • Preparation method of lithium ion battery anode

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preparation example Construction

[0045] See Figure 8 , the present invention provides a kind of preparation method of above-mentioned lithium ion battery anode, it comprises the following steps:

[0046] Step 1, preparing a carbon nanotube raw material, the carbon nanotube raw material is directly scraped from a carbon nanotube array, and adding the carbon nanotube raw material into water to form a carbon nanotube dispersion.

[0047] The carbon nanotube raw material is composed of a plurality of carbon nanotubes, and the carbon nanotubes include single-wall carbon nanotubes, double-wall carbon nanotubes or multi-wall carbon nanotubes. The carbon nanotubes have a diameter of 20 nanometers to 30 nanometers. The length of the carbon nanotubes is greater than 100 microns, preferably, the length of the carbon nanotubes is greater than 300 microns. The carbon nanotubes are preferably carbon nanotubes with a pure surface without impurities and without any chemical modification. It is understood that the presenc...

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Abstract

A method for preparing the anode of a lithium ion battery, comprising the following steps: preparing a carbon nanotube raw material, the carbon nanotube raw material is directly scraped from a carbon nanotube array, and adding the carbon nanotube raw material to water to form a carbon nanotube raw material. Nanotube dispersion; provide transition metal nitrate solution, add transition metal nitrate solution to carbon nanotube dispersion, stir to form a mixture of carbon nanotube floc structure and transition metal nitrate solution; carbon nanotube floc Freeze-drying the mixture of the like structure and the transition metal nitrate solution to obtain a lithium ion battery anode preform; and performing heat treatment on the lithium ion battery anode preform to obtain the lithium ion battery anode.

Description

technical field [0001] The invention relates to a lithium ion battery anode and a preparation method thereof, in particular to a carbon nanotube-based lithium ion battery anode and a preparation method thereof. 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 anode of a lithium-ion battery is an important part of a lithium-ion battery. At present, more and more mature anode materials are carbon materials, such as graphite, acetylene black, microbead carbon, petroleum coke, carbon fiber, pyrolysis polymer and pyrolysis carbon. However, with the development of technology, it is increasingly diffic...

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Application Information

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IPC IPC(8): H01M4/1391H01M4/04H01M4/131H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/0471H01M4/131H01M4/1391H01M4/625H01M10/0525H01M4/0416H01M4/663H01M4/70H01M2004/027Y02E60/10Y02P70/50H01M10/0569H01M10/0585H01M10/0565H01M4/13H01M2004/028H01M4/661
Inventor 罗宇峰王佳平姜开利范守善
Owner TSINGHUA UNIV