CN-120383306-B - Nitrogen-doped porous carbon sphere prepared based on arginine, and preparation method and application thereof

Abstract

The invention discloses a nitrogen-doped porous carbon sphere prepared based on arginine, and a preparation method and application thereof, and belongs to the technical field of sodium ion battery anode materials. The preparation method comprises the steps of adding arginine and benzaldehyde into a reaction solvent, uniformly mixing, transferring to a reaction kettle, performing solvothermal reaction to obtain a nitrogen-doped porous carbon sphere precursor, and carbonizing the nitrogen-doped porous carbon sphere precursor in a protective gas atmosphere at 650-850 ℃ to obtain the nitrogen-doped porous carbon sphere. The nitrogen-containing polymer spheres obtained by the reaction of the benzaldehyde and the arginine are used as carbon precursors, and the nitrogen-doped porous carbon spheres are obtained by one-step carbonization, so that the nitrogen-doped porous carbon spheres can be used as a negative electrode material of a sodium ion battery and have excellent electrochemical sodium storage performance.

Inventors

• CHEN ZIRUN
• TANG YANZHE
• WU ZHEN
• YIN YANZHEN
• LIANG XINGTANG
• ZHANG YANJUN
• ZHANG BINBIN

Assignees

• 北部湾大学

Dates

Publication Date

20260512

Application Date

20231213

Claims (9)

1. 1. The preparation method for preparing the nitrogen-doped porous carbon spheres based on arginine is characterized by comprising the following steps of: adding arginine and phthalaldehyde into a reaction solvent, uniformly mixing, and transferring to a reaction kettle for solvothermal reaction to obtain a nitrogen-doped porous carbon sphere precursor; The mol ratio of arginine to benzaldehyde is 1:1-1.1; The reaction solvent comprises one or two of glycol and water; And carbonizing the nitrogen-doped porous carbon sphere precursor in a protective gas atmosphere at 650-850 ℃ to obtain the nitrogen-doped porous carbon sphere.
2. 2. The method for preparing the nitrogen-doped porous carbon spheres based on arginine according to claim 1, wherein the phthalaldehyde is o-phthalaldehyde, m-phthalaldehyde or p-phthalaldehyde.
3. 3. The method for preparing the nitrogen-doped porous carbon spheres based on arginine according to claim 1, wherein the arginine is present in the reaction solvent in an amount ranging from 0.06 to 0.075mmol/L, and the benzaldehyde is present in the reaction solvent in an amount ranging from 0.06 to 0.075mol/L.
4. 4. The method for preparing the nitrogen-doped porous carbon spheres based on arginine according to claim 1, wherein the solvothermal reaction is performed at a temperature of 160-180 ℃ for a time of 8-10 hours.
5. 5. The method for preparing the nitrogen-doped porous carbon spheres based on arginine according to claim 1, wherein the carbonization time is 2-3 hours, and the heating rate is 2-5 ℃ per minute.
6. 6. The method for preparing the nitrogen-doped porous carbon spheres based on arginine according to claim 1, wherein the shielding gas is helium, neon, argon or nitrogen, and the gas flow rate of the shielding gas is 30-50mL/min.
7. 7. A nitrogen-doped porous carbon sphere made by the method of any one of claims 1-6.
8. 8. The use of the nitrogen-doped porous carbon spheres according to claim 7 in a sodium ion battery, wherein the nitrogen-doped porous carbon spheres are used for preparing a negative electrode of a sodium ion battery.
9. 9. The use according to claim 8, wherein the method for preparing the negative electrode of the sodium ion battery comprises the steps of: And mixing the nitrogen-doped porous carbon spheres, the binder and the conductive agent according to the mass ratio of 7:2:1, coating the mixture on the surface of the copper foil, and vacuum drying the mixture for 12 hours at 60 ℃ after the surface is dried at 80 ℃ to obtain the nitrogen-doped porous carbon sphere aluminum foil composite anode material.

Description

Nitrogen-doped porous carbon sphere prepared based on arginine, and preparation method and application thereof Technical Field The technical field of sodium ion battery cathode materials, in particular to a nitrogen-doped porous carbon sphere prepared based on arginine, and a preparation method and application thereof. Background The carbon material is an electrochemical energy storage material with great development potential, has excellent conductivity, higher specific surface area, good electrochemical stability and low price, and is the sodium ion battery anode material most widely used at present. However, the specific capacity value of the pure carbon material is generally low, so that the electrochemical energy storage performance needs to be further improved. Chemical modification of carbon materials can result in more active sites and thus higher specific capacities. At present, the specific capacity of the carbon material can be obviously improved by introducing hetero atoms into the porous carbon material. Nitrogen atoms are considered to be the best doping atoms for carbon materials due to their excellent chemical properties. The nitrogen atom doped porous carbon material is mainly obtained by carbonizing a nitrogen-containing carbon precursor. There are mainly two kinds of nitrogen-containing carbon precursors, one is a synthetic nitrogen-containing polymer such as polyaniline, polypyrrole, polyacrylonitrile, etc., and the other is a natural nitrogen-containing polymer such as chitosan, amino acid, etc. Wherein the natural nitrogen-containing carbon precursor is the simplest, efficient and low-cost nitrogen-containing carbon precursor. However, most of the existing natural nitrogen-containing carbon precursors have the problems of low carbonization yield, poor structure retention and the like. Therefore, how to realize the preparation of nitrogen-doped porous carbon materials with definite structures by using natural nitrogen-containing carbon precursors is still an intense research field. Disclosure of Invention Aiming at the problems, the invention provides a nitrogen-doped porous carbon sphere prepared based on arginine, a preparation method and application thereof, the invention uses nitrogen-containing polymer spheres obtained by the reaction of phthalaldehyde and arginine as carbon precursors, the nitrogen-doped porous carbon spheres obtained through one-step carbonization can be used as a negative electrode material of a sodium ion battery, and have excellent electrochemical sodium storage performance. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The first object of the invention is to provide a preparation method for preparing nitrogen-doped porous carbon spheres based on arginine, which comprises the following steps: adding arginine and phthalaldehyde into a reaction solvent, uniformly mixing, and transferring to a reaction kettle for solvothermal reaction to obtain a nitrogen-doped porous carbon sphere precursor; And carbonizing the nitrogen-doped porous carbon sphere precursor in a protective gas atmosphere at 650-850 ℃ to obtain the nitrogen-doped porous carbon sphere. Preferably, the molar ratio of the arginine to the benzaldehyde is 1:1-1.1, and the benzaldehyde is o-benzaldehyde, m-benzaldehyde or p-benzaldehyde. Preferably, the arginine is present in the reaction solvent in an amount of 0.06 to 0.075mmol/L and the phthalaldehyde is present in the reaction solvent in an amount of 0.06 to 0.075mol/L. Preferably, the reaction solvent comprises one or two of ethylene glycol and water. Preferably, the solvothermal reaction is at a temperature of 160-180 ℃ for a period of 8-10 hours. Preferably, the carbonization time is 2-3h, and the heating rate is 2-5 ℃ per minute. Preferably, the shielding gas is helium, neon, argon or nitrogen, and the gas flow rate of the shielding gas is 30-50mL/min. The second object of the present invention is to provide the nitrogen-doped porous carbon spheres prepared by the above preparation method. A third object of the present invention is to provide the use of the above nitrogen-doped porous carbon spheres in sodium ion batteries for preparing negative electrodes of sodium ion batteries. Preferably, the preparation method of the sodium ion battery cathode comprises the following steps: And mixing the nitrogen-doped porous carbon spheres, the binder and the conductive agent according to the mass ratio of 7:2:1, coating the mixture on the surface of the copper foil, and vacuum drying the mixture for 12 hours at 60 ℃ after the surface is dried at 80 ℃ to obtain the nitrogen-doped porous carbon sphere aluminum foil composite anode material. Compared with the prior art, the invention has the following beneficial effects: (1) According to the preparation method, the phenyldicarboxaldehyde and the arginine are used as reaction monomers, the arginine polymer microspheres are obtained through Schiff base pol