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Lithium ion battery negative electrode material as well as preparation method and application method thereof

A technology for lithium-ion batteries and negative electrode materials, which is applied in the manufacture of electrodes, battery electrodes, electrolyte storage batteries, etc., can solve problems such as the absence of further expansion space, and achieve the effects of broad market application value, high electrochemical capacity, and low cost

Active Publication Date: 2021-08-13
HUNAN JIUHUA CARBON HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the gram capacity of the existing graphite anode materials has basically reached its theoretical value, and there is no room for further expansion of the gram capacity. It is urgent to find new alternative materials to promote lithium-ion batteries to be safer and have higher energy density. Develop in a more economical direction

Method used

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  • Lithium ion battery negative electrode material as well as preparation method and application method thereof
  • Lithium ion battery negative electrode material as well as preparation method and application method thereof
  • Lithium ion battery negative electrode material as well as preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: a kind of negative electrode material of lithium ion battery and its preparation method and application method, such as figure 1 Shown, the preparation method of lithium-ion battery negative electrode material comprises the following steps:

[0032] S1. Preparation of carbon source

[0033] Using carbon / carbon composite material leftovers, waste materials, decommissioned waste materials and other residual materials as raw materials, the carbon / carbon composite material residual materials are mechanically crushed through a 100-mesh sieve, burned at 500°C, and then mixed with a strong alkali, at 90 Stir at ℃ until all the water is evaporated, and then carry out graphitization treatment through a graphitization furnace to obtain a carbon source.

[0034] Preferably, the strong base is potassium hydroxide, and the weight ratio of potassium hydroxide to carbon source is 0.5:1.

[0035] Preferably, the graphitization process is as follows: under the protection...

Embodiment 2

[0054] Embodiment 2: A lithium-ion battery negative electrode material and its preparation method and application method. The difference from Example 1 is that the preparation method of the lithium-ion battery negative electrode material comprises the following steps:

[0055] S1. Preparation of carbon source

[0056] Using carbon / carbon composite material leftovers, waste materials, decommissioned waste materials and other residual materials as raw materials, the carbon / carbon composite material residual materials are mechanically crushed through a 50-mesh sieve, burned at 400°C, and then mixed with a strong alkali, and heated at 80 Stir at ℃ until all the water is evaporated, and then carry out graphitization treatment through a graphitization furnace to obtain a carbon source.

[0057] Preferably, the strong base is sodium hydroxide, and the weight ratio of sodium hydroxide to carbon source is 0.1:1.

[0058] Preferably, the graphitization process is as follows: under the ...

Embodiment 3

[0069] Embodiment 3: A lithium ion battery negative electrode material and its preparation method and application method. The difference from Example 1 is that the preparation method of the lithium ion battery negative electrode material comprises the following steps:

[0070] S1. Preparation of carbon source

[0071] Using carbon / carbon composite material leftovers, waste materials, decommissioned waste materials and other residual materials as raw materials, the carbon / carbon composite material residual materials are mechanically crushed through a 150-mesh sieve, burned at 600°C, and then mixed with a strong alkali, at 100 Stir at ℃ until all the water is evaporated, and then carry out graphitization treatment through a graphitization furnace to obtain a carbon source.

[0072] Preferably, the strong base is sodium hydroxide, and the weight ratio of sodium hydroxide to carbon source is 1:1.

[0073] Preferably, the graphitization process is as follows: under the protection ...

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Abstract

The invention discloses a lithium ion battery negative electrode material as well as a preparation method and an application method thereof, and belongs to the technical field of lithium ion battery negative electrode materials. The preparation method comprises the following steps of: preparing a carbon source; purifying the carbon source; preparing a mixture; preparing carbide; and preparing the lithium ion battery silicon-carbon negative electrode material. The lithium ion battery negative electrode material is prepared by the preparation method of the lithium ion battery negative electrode material. The application method comprises the following steps of: mixing the lithium ion battery negative electrode material with acetylene black and a water-based binder LA133 according to a mass ratio of 91: 3: 6, taking dimethyl pyrrolidone as a solvent, and well stirring and mixing to form slurry; and coating a copper foil with a required size with the slurry, drying the copper foil in a vacuum drying oven at 85 DEG C for 12 hours, then pressing the copper foil into a sheet by a roller machine, drying the sheet in the vacuum drying oven, and stamping the sheet by a die into an electrode plate. The material has the advantages of high electrochemical capacity, low cost and environment-friendliness.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery negative electrode materials, more specifically, it relates to a lithium ion battery negative electrode material and its preparation method and application method. Background technique [0002] At present, carbon materials are mainly used as anode materials for lithium-ion batteries, and carbon materials mainly include natural graphitized carbon materials and artificial graphitized carbon materials. Graphitized carbon materials are currently more commonly used lithium-ion battery anode materials because they can provide stable output voltage, high specific capacity and high voltage. However, with the development of society, people are no longer satisfied with the current battery capacity and are constantly looking for new negative electrode materials. Silicon carbon negative electrode materials have become a hot research topic in recent years. [0003] Whether it is a traditional arti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/62H01M4/1395H01M4/04H01M10/0525H01M10/058B82Y40/00B82Y30/00
CPCH01M4/386H01M4/625H01M4/1395H01M4/04H01M10/058H01M10/0525B82Y30/00B82Y40/00Y02P70/50Y02E60/10
Inventor 阚国锋
Owner HUNAN JIUHUA CARBON HI TECH
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