Surface-modified pyrolytic carbon material, battery and preparation method and application of surface-modified pyrolytic carbon material

A surface modification and pyrolysis carbon technology, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of low initial charge and discharge efficiency, and achieve low cost, good adaptability and good safety. Effect

Pending Publication Date: 2021-04-16
NINGBO SHANSHAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a surface-modified pyrolytic carbon material, battery and its preparation method and appli

Method used

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  • Surface-modified pyrolytic carbon material, battery and preparation method and application of surface-modified pyrolytic carbon material
  • Surface-modified pyrolytic carbon material, battery and preparation method and application of surface-modified pyrolytic carbon material
  • Surface-modified pyrolytic carbon material, battery and preparation method and application of surface-modified pyrolytic carbon material

Examples

Experimental program
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Example Embodiment

[0043]Example 1

[0044]Step (1): The coal asphalt is warmed in the reaction kettle to the polymerization, the temperature of the polymerization is 100 ° C, the polymerization reaction is 6 h, and the time is reduced to room temperature; the material is transferred to the airflow pulverizer for airflow pulverization, Produce material A, the particle size of material A is 15.6 μm;

[0045]Step (2): The material A and heavy oil coating produced by step (1) are alternately added to the coating under the conditions of stirring, and the heating surface is coated under the protection of nitrogen, and the material A is heavy. The mass ratio of the tattoo oil is 12: 1; the surface coated is 300 ° C, the surface is covered with 3 h, and the material B is obtained.

[0046]Step (3): Under the protection of nitrogen, the material B at 1100 ° C under the carbonization treatment of 4 h; then cooled to room temperature, and then transferred to the ball mill for the spherical mill, the ball mill is 200 rpm...

Example Embodiment

[0047]Example 2

[0048]Step (1): The coal asphalt is warmed in the reaction kettle and the temperature of the polymerization reaction is 150 ° C, the polymerization reaction has a time of 10 h, down to the room temperature, transfer material to the airflow pulverizer to perform airflow grading grading, Material A, the particle size of material A is 20.8 μm;

[0049]Step (2): The material A and heavy oil coating produced by step (1) are alternately added to the coating under the conditions of stirring, and the heating surface is coated under the protection of nitrogen, and the material A is heavy. The mass ratio of the tattoo oil is 14: 1; the surface coated is 450 ° C, the surface coated is 5 h, and the material B is obtained.

[0050]Step (3): Under the protection of nitrogen, the material B at 1000 ° C under the carbonization treatment of 3 h; then cooled to room temperature, and then transferred to the ball mill for the ball mill, the ball mill is 100 rpm. Surface modified pyrolytic carb...

Example Embodiment

[0051]Example 3

[0052]Step (1): The coal asphalt is warmed in the reaction kettle and the polymerization temperature is 200 ° C, the polymerization is 1 h, and the time is reduced to room temperature. Transfer the material to the airflow pulverizer. Material A, the particle size of material A is 10.5 μm;

[0053]Step (2): When the material A and the coal tar coating obtained by the step (1) are alternately added to the coating under stirring, and the heat surface is coated under the protection of nitrogen, material A and heavy The quality ratio of the oil is 18: 1; the temperature of the surface is 600 ° C, the surface coated is 5 h, and the material B is obtained;

[0054]Step (3): Under the protection of nitrogen, the material B at 1500 ° C under the condition of 2 h; then cooled to room temperature, then transferred to the ball mill for the ball mill, the ball mill is 500 rpm, and the rotation speed of the ball mill is 500 rpm. Surface modified pyrolytic carbon material.

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Abstract

The invention discloses a surface modified pyrolytic carbon material, a battery a preparation method and application of the surface modified pyrolytic carbon material. The preparation method of the surface-modified pyrolytic carbon material comprises the following steps: (1) carrying out polymerization reaction on asphalt, crushing and grading to obtain a material A, (2) performing surface coating on the material A and a coating material to obtain a material B, and (3) carrying out carbonization treatment and ball-milling screening on the material B to obtain a surface modified pyrolytic carbon material, wherein in the step (1), the particle size D50 of the material A is 6-30 microns, and in the step (2), the coating material is coal tar and/or heavy oil, the weight part ratio of the material A to the coating material is (10-18):1, and the surface coating temperature is 300-600 DEG C. The surface-modified pyrolytic carbon material prepared by the invention is high in initial charge-discharge efficiency and discharge capacity, good in cycle performance, relatively good in high-current charge-discharge performance, good in safety, relatively good in adaptability to electrolytic solution and other additives and small in batch difference.

Description

technical field [0001] The invention relates to a surface modified pyrolysis carbon material, a battery and a preparation method and application thereof. Background technique [0002] In recent years, with the depletion of oil reserves on the earth and the greenhouse effect caused by automobile exhaust emissions, lithium-ion batteries with the characteristics of small size, light weight and environmental protection have become a research hotspot. Pyrolytic carbon material, the raw material of lithium-ion batteries, has attracted much attention due to its firm and stable structure, which is more suitable for use under high-current charging and discharging. Its good safety performance is expected to be applied in electric vehicles. [0003] At present, the initial charge and discharge efficiency of existing pyrolytic carbon materials is low, and the capacity loss mainly comes from irreversible reactions on the surface of carbon materials. [0004] Therefore, there is an urgen...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/62H01M10/0525C01B32/00
CPCY02E60/10
Inventor 薄维通谢秋生刘盼陈然
Owner NINGBO SHANSHAN NEW MATERIAL TECH
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