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A carbon-based negative electrode material, its preparation method and application

A negative electrode material, carbon-based technology, applied in the direction of carbon preparation/purification, negative electrode, battery electrode, etc., can solve the problems of complex preparation process and high cost

Active Publication Date: 2022-06-07
天津普兰能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent 2017101635284 uses a multi-step pyrolysis and coating method to prepare carbon negative electrode materials such as phenolic resin and other raw materials by coating soft carbon with hard carbon, which improves the first Coulombic efficiency, but multiple pyrolysis and the highest temperature reach 1600 ℃ , the preparation process is complicated and the cost is high

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  • A carbon-based negative electrode material, its preparation method and application
  • A carbon-based negative electrode material, its preparation method and application
  • A carbon-based negative electrode material, its preparation method and application

Examples

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Effect test

Embodiment 1

[0068] The preparation method of the carbon-based negative electrode material of the present embodiment includes the following steps:

[0069] Step 1: Weigh polyacrylonitrile resin as nitrogen-containing resin, which is purchased from Mitsui Chemicals Co., Ltd., and ball-milled to a powdery cured product with a particle size of ≤180 µm.

[0070] Step 2: Press the powder cured product obtained in Step 1 into a circular shape with a diameter of 50 mm and a thickness of 2 mm to obtain a resin pressed body.

[0071] Step 3: Put the resin pressed body obtained in Step 2 into a pressure-resistant high-temperature furnace (with an inner diameter slightly larger than 50mm), and the filling amount is about 2 / 3 of the volume in the furnace, evacuate, and replace the air in the pressure-resistant high-temperature furnace with nitrogen at least 2 times , and then under the protection of nitrogen, at a rate of 15°C / min, the temperature was first heated to 350°C and kept at a constant tempe...

Embodiment 2

[0079] The preparation method of the carbon-based negative electrode material of the present embodiment includes the following steps:

[0080] Step 1: According to the mass ratio of 1:1, respectively weigh the polyacrylonitrile resin and the phthalonitrile resin as the nitrogen-containing resin, and ball-mill into a powdery cured product with a particle size of ≤150µm. The polyacrylonitrile resin was purchased from Aladdin with the specification of P303198; the phthalonitrile resin was purchased from the Maverick Company in the United States with the specification of MVK-3.

[0081] Step 2: Press the powder cured product obtained in Step 1 into a circular shape with a diameter of 50 mm and a thickness of 2 mm to obtain a resin pressed body.

[0082] Step 3: Put the resin compact obtained in Step 2 into a pressure-resistant high-temperature furnace (with an inner diameter slightly larger than 50 mm), and the filling amount is about 2 / 3 of the furnace volume, evacuate, and repla...

Embodiment 3

[0087] The preparation method of the carbon-based negative electrode material of the present embodiment includes the following steps:

[0088] Step 1: According to the mass ratio of 70:30, respectively weigh polyacrylonitrile resin and polyimide resin as nitrogen-containing resin, then add needle coke that accounts for 20% of the mass of the nitrogen-containing resin, and ball-mill to a particle size of ≤150µm powder solidified product. The polyacrylonitrile resin was purchased from Aladdin with the specification of P303198; the polyimide resin was purchased from Shanghai Yehe Industry and Trade Co., Ltd. with the specification of P84UHT.

[0089] Step 2: Press the powder cured product obtained in Step 1 into a circular shape with a diameter of 50 mm and a thickness of 2 mm to obtain a resin pressed body.

[0090] Step 3: Put the resin compact obtained in Step 2 into a pressure-resistant high-temperature furnace (with an inner diameter slightly larger than 50 mm), and the fil...

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Abstract

The invention discloses a carbon-based negative electrode material, its preparation method and application, and belongs to the technical field of carbon materials. The preparation method of the carbon-based negative electrode material includes the following steps: step 1: according to the mass ratio of 100: (0-20), respectively weigh the nitrogen-containing resin and the ingredients, and ball mill them into powder to obtain a powdery cured product; step 2: Compress the powdery cured product to obtain a resin compact; Step 3: Put the resin compact into a pressure-resistant high-temperature furnace, vacuumize, replace the air in the pressure-resistant high-temperature furnace with an inert gas at least once, and then inert Under gas protection, heat up for the first time and maintain the pressure in the pressure-resistant high-temperature furnace; Step 4: Use an inert gas to adjust and maintain the pressure in the pressure-resistant high-temperature furnace, raise the temperature for the second time, and then cool naturally to room temperature to obtain the carbon-based negative electrode material . The invention also discloses a carbon-based negative electrode material and its application. By adopting the method of the invention, carbon-based negative electrode materials with low specific surface area and high first-time Coulombic efficiency can be prepared.

Description

technical field [0001] The invention relates to a carbon-based negative electrode material, a preparation method and application thereof, and belongs to the technical field of carbon materials. Background technique [0002] At present, fossil fuels are still the main energy source and the supply is becoming increasingly tight. The development of renewable energy sources such as solar energy, wind energy and tidal energy is more and more important, and the proportion of energy supply will be higher and higher. However, restricted by factors such as weather, location and time, renewable energy is highly volatile, which greatly limits its large-scale application. To solve this problem, large-scale energy storage technology has become an important research field. Among them, secondary batteries such as supercapacitors and lithium-ion batteries are one of the options for large-scale electricity storage. [0003] Lithium-ion batteries have the advantages of high operating voltag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05H01G11/32H01M4/587H01M10/0525H01M10/054
CPCC01B32/05H01M4/587H01M10/0525H01M10/054H01G11/32H01M2004/027Y02E60/13
Inventor 崔维国叶翠李爱红费鹏扬
Owner 天津普兰能源科技有限公司