Battery negative electrode material and preparation method thereof

A battery negative electrode, quinoline technology, applied in the field of preparing carbonaceous battery negative electrode materials, can solve problems such as endangering the ecological environment

Pending Publication Date: 2022-05-10
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The removed coal tar pitch quinoline insoluble matter is a kind

Method used

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  • Battery negative electrode material and preparation method thereof
  • Battery negative electrode material and preparation method thereof
  • Battery negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] a) Add 25g of coal tar pitch and 50g of washing oil kerosene mixed solvent with a ratio of 0.4 to aromatic resin (that is, the mass ratio of solvent to coal tar pitch is 2:1) into the reactor, and pressurize to 1.0Mpa after purging with nitrogen After raising the temperature to 130°C, stir mechanically for 1 hour, maintain the temperature and pressure and let it settle for 4 hours, then take out the residue at the bottom of the reaction kettle to obtain coal tar pitch quinoline insoluble matter;

[0052] b) Add coal tar pitch quinoline insolubles in quinoline solution, utilize quinoline solution to ultrasonically disperse under heating conditions, after fully dispersed, place in a 50ml centrifuge tube, centrifuge at 4000R / min for 30min, collect the centrifuge tube solid;

[0053] c) The collected solid was washed four times with quinoline solution and toluene solution while hot, and placed in an oven at 120°C to remove residual solvent;

[0054] d) The washed solid is ...

Embodiment 2

[0059] a) Add 25g of coal tar pitch and 50g of washing oil kerosene mixed solvent with a ratio of 0.4 to aromatic resin (that is, the mass ratio of solvent to coal tar pitch is 2:1) into the reactor, and pressurize to 1.0Mpa after purging with nitrogen After raising the temperature to 130°C, stir mechanically for 1 hour, maintain the temperature and pressure and let it settle for 4 hours, then take out the residue at the bottom of the reaction kettle to obtain coal tar pitch quinoline insoluble matter;

[0060] b) Add coal tar pitch quinoline insolubles in quinoline solution, utilize quinoline solution to ultrasonically disperse under heating conditions, after fully dispersed, place in a 50ml centrifuge tube, centrifuge at 4000R / min for 30min, collect the centrifuge tube solid;

[0061] c) The collected solid was washed four times with quinoline solution and toluene solution while hot, and placed in an oven at 120°C to remove residual solvent;

[0062] d) placing the washed s...

Embodiment 3

[0067] a) Add 25g of coal tar pitch and 50g of washing oil kerosene mixed solvent with a ratio of 0.4 to aromatic resin (that is, the mass ratio of solvent to coal tar pitch is 2:1) into the reactor, and pressurize to 1.0Mpa after purging with nitrogen After raising the temperature to 130°C, stir mechanically for 1 hour, maintain the temperature and pressure and let it settle for 4 hours, then take out the residue at the bottom of the reaction kettle to obtain coal tar pitch quinoline insoluble matter;

[0068] b) Add coal tar pitch quinoline insolubles in quinoline solution, utilize quinoline solution to ultrasonically disperse under heating conditions, after fully dispersed, place in a 50ml centrifuge tube, centrifuge at 4000R / min for 30min, collect the centrifuge tube solid;

[0069] c) The collected solid was washed four times with quinoline solution and toluene solution while hot, and placed in an oven at 120°C to remove residual solvent;

[0070] d) placing the washed s...

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Abstract

The invention provides a battery negative electrode material and a preparation method thereof. The preparation method comprises the following steps: mixing coal tar pitch with a solvent which is a mixed solvent of kerosene, absorber oil or anthracene oil in a certain proportion, stirring at a certain temperature and pressure, standing and settling to obtain a coal tar pitch quinoline insoluble; the method comprises the following steps: adding coal tar pitch quinoline insolubles into a quinoline solution, performing centrifugal separation, and collecting solids; sequentially washing the solid with a quinoline solution and a toluene solution which are heated to 70 DEG C, and drying; and putting the dried solid into a furnace, and carbonizing under the protection of inert gas to obtain the battery negative electrode material. The preparation method has the advantages of environmental friendliness, no pollution, simplicity in operation, low raw material price and excellent property of the battery negative electrode material.

Description

technical field [0001] The invention belongs to the reutilization of coal waste processed carbon materials, and in particular relates to a method for preparing carbonaceous battery negative electrode materials by using coal tar quinoline insoluble matter. Background technique [0002] At present, the research on lithium battery anode materials at home and abroad has been relatively in-depth. There are mainly two types of carbon materials such as carbon microspheres and petroleum coke, and non-carbon materials such as tin-based materials and silicon-based materials. However, the preparation process of these materials is very complicated and the preparation cost is very high. [0003] In the process of mesophase conversion of coal tar pitch into needle coke, quinoline insolubles can be adsorbed on the surface of mesophase spheres, which reduces the activation energy of the reaction during the formation of mesophase pitch and promotes the nucleation of mesophase spheres. The g...

Claims

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Application Information

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IPC IPC(8): C01B32/05H01M4/587H01M10/0525
CPCC01B32/05H01M4/587H01M10/0525H01M2004/027
Inventor 林雄超王彩红张玉坤张晓静
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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