CN114890403A - Nitrogen-doped polymer derived carbon material and application thereof in sodium ion battery - Google Patents
Nitrogen-doped polymer derived carbon material and application thereof in sodium ion battery Download PDFInfo
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Abstract
The invention belongs to the technical field of new materials and electrochemical energy, and provides a nitrogen-doped polymer derived carbon material and application thereof in a sodium ion battery. The preparation method of the nitrogen-doped polymer derived carbon material comprises the following steps: s1: adding terephthaloyl chloride and a nitrogen source compound into a solvent to carry out a closed reaction at high temperature and high pressure; s2: after the reaction is finished, releasing pressure to normal pressure, naturally cooling to room temperature, centrifuging, washing and drying the obtained solid to obtain a dried sample; s3: and carrying out high-temperature roasting treatment on the dried sample under the protection of inert gas to obtain the nitrogen-doped polymer derived carbon material. The nitrogen-doped polymer derived carbon material has excellent performance, can be used for preparing a negative electrode material of a sodium ion battery, can be used in the sodium ion battery, shows good electrochemical performance, and has great application potential and industrial value in the electrochemical field.
Description
Technical Field
The invention belongs to the technical field of new materials and electrochemical energy, and particularly provides a nitrogen-doped polymer derived carbon material and application thereof in a sodium-ion battery.
Background
As fossil fuel consumption increases, demand for energy is increasing, resulting in air pollution and global warming. Renewable energy sources such as solar, wind and tidal energy are considered promising candidates for mitigating fossil fuel dependence. However, due to the intermittency of renewable energy sources, energy storage systems are required to achieve continuous energy harvesting and stable energy output. Since the successful commercialization in the 1990's, lithium ion batteries have powered billions of portable electronic devices and are now being used in electric vehicles. However, their cost is prohibitive due to scarcity, uneven distribution, and difficult recovery of lithium resources. Sodium ion batteries, which operate by a similar mechanism to lithium ion batteries, are considered economical alternatives because of their desirable properties and abundant sodium and potassium resources. The performance of alkali metal ion batteries depends largely on the positive and negative electrode materials. Various types of positive electrode materials based on reversible intercalation/deintercalation of alkali metal ions have been developed, many of which exhibit desirable energy density and cycling performance. However, research on the anode material has progressed relatively slowly compared to the cathode material.
Doping with heteroatoms (N, B, S, P, F, etc.) is also a commonly studied way to improve the performance of carbon materials, and doping with heteroatoms can destroy the electrical neutrality of the material, create defects, and improve the capacity and conductivity of the material, so that various heteroatom-doped carbon materials have been widely explored and have achieved significant results.
In recent years, heteroatom-doped carbon materials having high specific surface area, excellent conductivity and stability have been widely used in sodium ion batteries, for example:
CN108281654A discloses a preparation method of low-temperature nitrogen doping for negative electrode material of sodium ion battery, which at least includes the following steps: dividing the corn straws into corn husks and corn cores, grinding the corn husks into powder, and completely drying; immersing the reaction kettle in a polytetrafluoroethylene reaction kettle lining containing dilute sulfuric acid aqueous solution for reaction, washing to be neutral, completely drying, and fully grinding; transferring the mixture into a high-temperature tube furnace, heating to 1100-1300 ℃, preserving heat for 1-6 h, and naturally cooling to room temperature; soaking the product in a mixed solution of nitric acid and hydrogen peroxide, continuously stirring, then adding distilled water with the same volume, continuously stirring, subsequently washing the obtained sample, and fully drying; transferring the mixture into an ethylenediamine solution, heating to 60-80 ℃ in the process of continuous stirring, reacting, and completely drying. The sodium ion battery cathode material prepared by the method shows good rate performance under different current densities.
CN114275762A discloses a nitrogen-doped hard carbon sodium ion battery cathode material and a preparation method thereof, wherein the preparation method comprises the following steps: dispersing lignin-based hard carbon prepared by direct high-temperature pyrolysis and carbonization of lignin in deionized water, then adding sodium ferrocyanide, a surfactant and acid into the hard carbon dispersion liquid according to a certain proportion, reacting at a certain temperature and for a certain time to obtain a Prussian blue/hard carbon composite precipitate, washing, drying, performing high-temperature pyrolysis on the precipitate for nitrogen doping, washing again, and drying to obtain the cathode material. The negative electrode material has the characteristics of high specific capacity, high rate performance, high cycle stability and the like, and is a novel energy storage sodium ion battery negative electrode material which is green, environment-friendly and low in cost; the main raw material lignin used by the invention is widely distributed in nature, can be regenerated, has low cost, and the prepared cathode material has stable performance.
CN107331867A discloses a preparation method of a nitrogen-doped porous carbon material used as a negative electrode material of a sodium ion battery, belonging to a preparation method of nitrogen-doped porous carbon. The controlled synthesis of the nitrogen-doped carbon material is realized by regulating and controlling various parameters in the reaction process by means of a simple and easy high-temperature solid-phase reaction method, and the nitrogen-doped carbon material is applied as a negative electrode material of a sodium ion battery; the specific method comprises the following steps: dissolving the selected nitrogen source in a solvent to form a transparent solution A, adding a proper amount of carbon source into the solution A, and stirring and continuously adding the solvent to fully diffuse the nitrogen source. Drying the above materials in a freeze dryer for 2-12 hr; then placing a proper amount of the mixture into a crucible, heating the mixture to 300-1100 ℃ at the speed of 2-8 ℃/min under the argon atmosphere in a vacuum tube furnace, preserving the heat for 1-6 hours, and separating and purifying the generated product to obtain the target product. The raw materials are cheap and easy to obtain, the synthesis method is simple, the controllability of the operation steps is high, and the expanded production is easy. The material is used as a negative electrode material of a sodium-ion battery, and shows excellent electrochemical performance.
CN107978750A discloses a method for forming a negative electrode material of a sodium ion battery, which includes: under the condition of ammonia water, carrying out a sol-gel process on carbon nanofibers, a surfactant and tetraethyl orthosilicate to obtain a carbon fiber-surfactant-mesoporous silica composite material; placing the carbon fiber-surfactant-mesoporous silica composite material in an excessive ammonium nitrate and ethanol solution to obtain a carbon fiber-mesoporous silica composite material; carrying out a solvent evaporation process on the carbon fiber-mesoporous silica composite material to obtain a carbon fiber-nitrogen-sulfur-containing carbon source-mesoporous silica composite material; removing the silicon dioxide template in the carbon fiber-nitrogen-sulfur carbon source-mesoporous silicon dioxide composite material; filtering and washing to obtain the carbon fiber-nitrogen-sulfur co-doped mesoporous carbon composite material with the coaxial cable structure. The sodium ion battery anode material formed by the embodiment of the patent has the advantages of large specific capacity, and good rate capability and cycle performance.
CN113659143A provides a preparation method of a sodium ion battery negative electrode material, the negative electrode material and a sodium ion battery. The preparation method of the negative electrode material of the sodium-ion battery comprises the following steps: (1) the hydrothermal reaction is that after phenylenediamine, tannic acid and graphene oxide are evenly stirred in water, the mixture is transferred into a reaction kettle to be subjected to hydrothermal reaction to obtain a compound; (2) and carbonizing the compound in a carbonization furnace at 400-700 ℃ by carbonization reaction. In the preparation method, after the phenylenediamine and the tannic acid are carbonized, a hard carbon material can be formed on the basis of the graphene, more ion diffusion channels are provided, and the high-rate charge-discharge performance is improved. The phenylenediamine and the tannic acid can be used for carrying out mixed element doping on the formed graphene composite material so as to increase partial active sites of the material and improve the whole material capacity. In addition, the N and O doped and carbonized graphene composite material also has high conductivity, and the addition of a conductive agent can be reduced when the graphene composite material is prepared into a negative plate, so that the manufacturing cost of the battery is reduced.
CN110148733A discloses a hetero-atom doped carbon material and a preparation method and application thereof. The doped carbon material prepared by the method is a honeycomb three-dimensional multi-level pore structure material: the macropores are constructed by mutually cross-linked sheets, the sheets are formed by stacking nano particles, and random mesopores and micropores are distributed among the nano particles. The preparation method comprises the following steps: firstly, dissolving polyacrylonitrile into an N, N-dimethylformamide solution, then adding a reagent (one or more) containing target doping atoms, carrying out solvothermal reaction to obtain a precursor, and calcining the precursor in a protective atmosphere to obtain the single or multi-atom doped carbon material with uniform nano size and excellent electrochemical performance. The composite material is used as a negative electrode material of a sodium ion battery, and the sodium ion battery has higher specific capacity, excellent rate capability and overlong cycling stability.
CN112928269A discloses a preparation method of a porous amorphous silicon/polypyrrole sodium ion battery cathode material with a yolk-eggshell structure, wherein porous amorphous silicon is prepared by sodium thermal reduction of cheap silicon dioxide, an aluminum oxide layer and a polypyrrole polymer layer are sequentially deposited on the surface of the amorphous silicon, and the aluminum oxide layer is removed by a hydrochloric acid etching method to obtain the porous amorphous silicon/polypyrrole composite material with the yolk-eggshell structure; the material has stable structure and good conductivity, and can be used for preparing sodium ion batteries with high specific capacity, long cycle life and good rate performance; the preparation method is easy to operate, low in cost, green and environment-friendly, simple in required equipment and suitable for industrial implementation and mass production.
CN109524652A discloses a covalent organic framework/graphene composite organic material, a preparation method thereof and application thereof in a lithium/sodium ion battery cathode material. Firstly, calcining graphene oxide at high temperature under ammonia gas to obtain a nitrogen-doped reduced graphene oxide sheet; mixing the graphene oxide with 1,3, 5-benzene trimethyl acyl chloride and p-phenylenediamine, and carrying out in-situ one-step synthesis by using a ball milling method to obtain the covalent organic framework/graphene composite organic material. The preparation method adopts an in-situ one-step ball milling method to synthesize the COF/N-rGO organic composite material, and the COF/N-rGO organic composite material has lower solubility in electrolyte and is beneficial to the structural stability of a negative electrode material. The lithium/sodium ion battery based on the material shows higher specific capacity, better rate performance and cycle performance. The method has simple process, is beneficial to large-scale industrial production, and promotes the development of the industrialization of the lithium ion battery and the sodium ion battery.
As described above, many prior arts disclose heteroatom-doped carbon materials, and due to the introduction of heteroatoms (such as N, S, P, etc.), the obtained carbon materials have better cycling stability and high rate capability. However, the synthesis process of the material is complex, the synthesis conditions are strict, the large-scale production is difficult, and the electrochemical performance of the material needs to be further improved.
For the above reasons. It is of great significance to develop a heteroatom-doped carbon material which is green, environmentally friendly and relatively simple in process and is still hot. In addition, it is a hot spot of research in the field of sodium ion batteries, and this is the basis and motivation for the completion of the present invention.
Disclosure of Invention
The present inventors have conducted intensive studies in order to develop a novel heteroatom-doped carbon material, particularly a carbon material that yields a negative electrode material for a sodium ion battery, and after having paid a great deal of creative efforts, have completed the present invention.
Specifically, the technical scheme and content of the invention relate to a nitrogen-doped polymer derived carbon material, a sodium ion battery negative electrode material, a preparation method and a sodium ion battery.
In a first aspect of the present invention, there is provided a nitrogen-doped polymer-derived carbon material, the preparation method comprising the steps of:
s1: adding terephthaloyl chloride and a nitrogen source compound into a solvent, and carrying out a closed reaction at 1 high temperature and high pressure;
s2: after the reaction is finished, releasing pressure to normal pressure, naturally cooling to room temperature, centrifuging, washing and drying the obtained solid to obtain a dried sample;
s3: and carrying out high-temperature carbonization treatment on the dried sample under the protection of inert gas, thereby obtaining the nitrogen-doped polymer derived carbon material.
Preferably, in step S1, the polymer-derived carbon material is used as a precursor, and the nitrogen source compound is a nitrogen-containing benzene ring compound, such as any one of p-phenylenediamine, aniline, melamine, 1,3, 5-triazine-2, 4, 6-trione, and the like, and most preferably p-phenylenediamine.
Preferably, in step S1, the solvent is an ester compound, such as methyl acetate, ethyl acetate, propyl acetate, ϒ -valerolactone, and the like, and most preferably ϒ -valerolactone.
Preferably, in step S1, the reaction temperature (i.e., the "high temperature") is 100-.
Preferably, in step S1, the reaction pressure (i.e., the "high pressure") is 1 to 6MPa, and may be, for example, 1 MPa, 2 MPa, 3 MPa, 4 MPa, 5MPa or 6MPa, and is most preferably 1.5 MPa.
Preferably, in step S1, the reaction time is 2 to 10 hours, and may be, for example, 2 hours, 4 hours, 6 hours, 8 hours, or 10 hours.
Preferably, in step S1, the molar ratio of terephthaloyl chloride to nitrogen source compound is 1:0.5-2, and may be, for example, 1:0.5, 1:1, 1:1.5, or 1: 2.
Preferably, in step S1, the molar ratio of the nitrogen source compound to the solvent is 1:20-40, and may be, for example, 1:20, 1:31.1, 1: 40.
Preferably, in step S2, the rotation speed of the centrifuge is 8000-12000 rpm/min, such as 8000 rpm/min, 9000 rpm/min, 10000 rpm/min, 11000 rpm/min or 12000 rpm/min.
Preferably, in step S2, the drying temperature is 60-120 deg.C, such as 60 deg.C, 80 deg.C, 100 deg.C or 120 deg.C; the drying time is 4 to 12 hours, and may be, for example, 4 hours, 6 hours, 8 hours, 10 hours, or 12 hours.
Preferably, in step S3, the temperature of the high-temperature baking treatment is 700-1100 ℃, for example, 700 ℃, 800 ℃, 900 ℃, 1000 ℃ or 1100 ℃, preferably 700-900 ℃, and most preferably 800 ℃.
Preferably, in step S3, the high-temperature baking treatment time is 1-4 hours, and may be, for example, 1 hour, 2 hours, 3 hours, or 4 hours.
Preferably, in step S3, the inert gas is nitrogen or argon.
The high-temperature carbonization treatment in step S3 is to place the dried sample at a high temperature in an inert gas atmosphere in this temperature range for 1 to 3 hours, thereby obtaining the nitrogen-doped polymer derived carbon material of the present invention.
When the preparation method disclosed by the invention is adopted, particularly the preferred process parameters are written, the nitrogen-doped polymer derived carbon material with excellent electrical properties can be obtained, and the negative electrode material prepared from the nitrogen-doped polymer derived carbon material has excellent electrochemical properties, such as high battery capacity, good stability, long service life and the like, so that the nitrogen-doped polymer derived carbon material can be applied to the field of sodium ion batteries.
In a second aspect of the invention, there is provided a carbon anode material comprising a nitrogen-doped polymer-derived carbon material as described above.
In a third aspect of the present invention, there is provided a method for preparing the carbon negative electrode material as described above, comprising the steps of:
A. mixing the nitrogen-doped polymer derived carbon material, Ketjen black and PVDF, adding cosolvent N-methylpyrrolidone, uniformly stirring the mixed materials, coating the uniformly mixed slurry on a copper foil according to a certain thickness, and drying the copper foil coated with the slurry in an oven;
B. and (3) placing the dried copper foil on a cutting machine, cutting the electrode slice with the size, and weighing the cut electrode slice to obtain the carbon negative electrode material.
Preferably, in step a, the ratio of the carbon material, ketjen black, PVDF may be 8:1:1, 9:0.5:0.5, 7:2:1, or 6:2: 2.
Preferably, in the step A, the N-methyl pyrrolidone is anhydrous and has a purity of more than or equal to 99%.
In step a, the amount of the N-methylpyrrolidone may be appropriately selected by those skilled in the art, and may be, for example, an amount that the carbon negative electrode material and other raw materials are sufficiently dispersed so that the mixed slurry can be conveniently coated on a copper foil.
In step a, the thickness of the paste coating is not specifically defined, and the thickness of the coating paste may be adjusted according to the viscosity of the paste, for example.
In step A, the drying temperature is 60 ℃ to 120 ℃, and may be, for example, 60 ℃, 80 ℃, 100 ℃ or 120 ℃.
In step B, the diameter of the cut pole piece can be 12-18mm, for example 12mm, 14mm, 16mm or 18mm, as required.
In step B, the amount of the active material on the electrode plate is not specifically defined, and as long as the assembled sodium-ion battery has higher capacity and excellent stability, the quality of the active material on the electrode plate can be determined and selected by those skilled in the art, and will not be described in detail again.
In a fourth aspect of the invention, there is provided a sodium ion battery comprising the carbon anode material described above.
As described above, the carbon negative electrode material has various excellent electrochemical properties, so that it can be applied to a sodium ion battery, thereby obtaining a sodium ion battery having excellent properties.
As described above, the present invention provides a nitrogen-doped polymer-derived carbon material, a preparation method thereof, a use thereof, and a carbon negative electrode material comprising the same, wherein the nitrogen-doped polymer-derived carbon material has excellent properties, can be used to prepare a carbon negative electrode material for a sodium ion battery, can be used in the sodium ion battery, exhibits good electrochemical properties, and has great application potential and industrial value in the electrochemical field. The sodium ion battery has huge potential in the future and can become a substitute of a lithium ion battery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a Scanning Electron Microscope (SEM) image of a nitrogen-doped polymer-derived carbon material prepared in example 1 of the present invention.
FIG. 2 is an XRD pattern of a nitrogen-doped polymer-derived carbon material prepared in example 1 of the present invention.
FIG. 3 is a Raman fit chart of the carbon material derived from the nitrogen-doped polymer prepared in example 1 of the present invention.
FIG. 4 is a CV diagram of a carbon material derived from a nitrogen-doped polymer prepared in example 1 of the present invention.
FIG. 5 is a first charge-discharge curve of the carbon material derived from nitrogen-doped polymer prepared in example 1 of the present invention.
FIG. 6 is a large-scale cycle chart of the carbon material derived from nitrogen-doped polymer prepared in example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The present invention is described in detail below with reference to specific drawings and examples, but the use and purpose of these exemplary drawings and embodiments are only to exemplify the present invention, not to limit the actual scope of the present invention in any way, and not to limit the scope of the present invention.
Example 1
S1: terephthaloyl chloride, p-phenylenediamine and ϒ -valerolactone were reacted in a polytetrafluoroethylene lined autoclave at 180 ℃ and 1.5MPa for 4 hours at a molar ratio of 1:1 of terephthaloyl chloride to p-phenylenediamine and 1:31.1 of p-phenylenediamine to ϒ -valerolactone.
S2: and after the reaction is finished, releasing the pressure to normal pressure, naturally cooling to room temperature, centrifugally washing the obtained solid, and drying at 120 ℃ for 12 hours to obtain a dried sample.
S3: the dried sample was carbonized at a high temperature of 800 ℃ for 2 hours under the protection of nitrogen gas, thereby obtaining a nitrogen-doped polymer-derived carbon material, which was named M1.
Examples 2 to 7: investigation of material usage ratio in step S1
Examples 2 to 5: example 1 was repeated except that the molar ratio of terephthaloyl chloride to p-phenylenediamine was 1:2, 2:3, 2:1, and 3:2 in step S1, and examples 2 to 5 were sequentially performed by repeating example 1, and the obtained carbon materials were sequentially named as M2, M3, M4, and M5.
TABLE 1
| Electrode material | M2 | M3 | M4 | M5 |
| |
1:2 | 2:3 | 2:1 | 3:2 |
Examples 6 to 7: example 1 was repeated except that the molar ratio of p-phenylenediamine to ϒ -valerolactone in step S1 was changed to 1:20 and 1:40, thereby obtaining examples 6 to 7 in this order, and the obtained carbon materials were named M6 and M7 in this order.
TABLE 2
| Electrode material | M6 | M7 |
| |
1:20 | 1:40 |
Examples 8 to 9: examination of baking temperature in step S3
The procedure of example 1 was repeated, except that the high-temperature calcination temperature in step S3 was changed from 800 ℃ to 700 ℃ and 900 ℃ respectively, to obtain examples 8 to 9 in this order, and the resulting carbon materials were thus designated as M8 and M9.
Preparation method of sodium ion battery negative electrode material M1 negative electrode material
A. Mixing the nitrogen-doped polymer derived carbon material M1, Ketjen black and PVDF according to a certain proportion, adding cosolvent N-methyl pyrrolidone, uniformly stirring the mixed materials, and coating the uniformly mixed slurry on a copper foil according to a certain thickness. And (4) drying the copper foil coated with the slurry in an oven.
B. And (3) placing the dried copper foil on a cutting machine, cutting the electrode slice with the size, weighing the cut electrode slice, and calculating the mass of the active substance. And obtaining the sodium ion carbon cathode material. It was named as M1 anode material.
Preparation method of sodium-ion battery negative electrode material M2-M9 negative electrode material
The above-described "method for producing an oxygen reduction electrode M1 electrode" was repeated by replacing the composite material M1 with M2 to M9, and the other operations were not changed, so that carbon negative electrode materials using M2 to M9 were obtained in this order, and they were named as M2 to M9 negative electrode materials.
As described above, the invention provides a novel nitrogen-doped polymer-derived carbon material, a preparation method and a use thereof, and a sodium ion battery negative electrode material prepared from the carbon material, wherein the carbon material has an irregular morphology, so that the specific surface area is large, and a plurality of active sites are formed on the surface of the carbon material, so that the carbon material has excellent electrochemical performance, and the battery capacity is high, and the Huaren has excellent cycling stability. In addition, the process is simpler, and the used medicines and reagents have lower cost. Finally, the process has little environmental pollution and is a green and environment-friendly process. In conclusion, the material can be used for preparing a sodium ion battery cathode material, so that the material can be applied to a sodium ion battery, shows excellent electrical properties, and has good application prospects and industrialization potential in the electrochemical field.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should also be understood that various alterations, modifications and/or variations can be made to the present invention by those skilled in the art after reading the technical content of the present invention, and all such equivalents fall within the scope of the claims of the present application.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A nitrogen-doped polymer derived carbon material is characterized in that the preparation method comprises the following steps:
s1: adding terephthaloyl chloride and a nitrogen source compound into a solvent to carry out a closed reaction at a reaction temperature of 100-220 ℃ and a reaction pressure of 1-6 MPa;
s2: after the reaction is finished, releasing pressure to normal pressure, naturally cooling to room temperature, centrifuging, washing and drying the obtained solid to obtain a dried sample;
s3: and carrying out high-temperature carbonization treatment on the dried sample at the temperature of 700-1100 ℃ under the protection of inert gas, thereby obtaining the nitrogen-doped polymer derived carbon material.
2. The nitrogen-doped polymer-derived carbon material of claim 1, wherein: in step S1, the polymer-derived carbon material is used as a precursor, and the nitrogen source compound is a nitrogen-containing benzene ring compound.
3. The nitrogen-doped polymer-derived carbon material according to claim 2, wherein: in step S1, the nitrogen source compound is p-phenylenediamine.
4. The nitrogen-doped polymer-derived carbon material of claim 1, wherein: in step S1, the solvent is an ester compound.
5. The nitrogen-doped polymer-derived carbon material of claim 4, wherein: in step S1, the solvent is ϒ -valerolactone.
6. The nitrogen-doped polymer-derived carbon material of claim 1, wherein: in step S1, the molar ratio of terephthaloyl chloride to nitrogen source compound is 1: 0.5-2.
7. The nitrogen-doped polymer-derived carbon material of claim 1, wherein: in step S1, the nitrogen source compound to solvent molar ratio is 1: 20-40.
8. A carbon negative electrode material characterized in that: the carbon material comprises a nitrogen-doped polymer-derived carbon material according to any one of claims 1 to 7.
9. The method for producing a carbon negative electrode material according to claim 8, characterized by comprising the steps of:
A. mixing the nitrogen-doped polymer derived carbon material, the ketjen black and the PVDF according to any one of claims 1 to 7, adding cosolvent N-methyl pyrrolidone, uniformly stirring the mixed materials, coating the uniformly mixed slurry on a copper foil according to a certain thickness, and drying the copper foil coated with the slurry in an oven;
B. and (3) placing the dried copper foil on a cutting machine, cutting the electrode slice with the size, and weighing the cut electrode slice to obtain the carbon negative electrode material.
10. A sodium ion battery comprising the carbon anode material of claim 8.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115849372A (en) * | 2022-12-01 | 2023-03-28 | 珠海科创能源技术有限公司 | Preparation of active hard carbon material and application of active hard carbon material in sodium ion battery |
| CN117466283A (en) * | 2023-12-27 | 2024-01-30 | 国钠能源科技(河北)有限公司 | Hard carbon material with high ion diffusion coefficient and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107331867A (en) * | 2017-07-05 | 2017-11-07 | 中国矿业大学 | Nitrogen-doped porous carbon material preparation method as sodium-ion battery negative pole |
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| CN112638824A (en) * | 2018-08-28 | 2021-04-09 | 积水化学工业株式会社 | Carbon material, method for producing same, electrode material for electricity storage device, and electricity storage device |
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| CN107331867A (en) * | 2017-07-05 | 2017-11-07 | 中国矿业大学 | Nitrogen-doped porous carbon material preparation method as sodium-ion battery negative pole |
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| CN117466283A (en) * | 2023-12-27 | 2024-01-30 | 国钠能源科技(河北)有限公司 | Hard carbon material with high ion diffusion coefficient and preparation method and application thereof |
| CN117466283B (en) * | 2023-12-27 | 2024-04-19 | 国钠能源科技(河北)有限公司 | Hard carbon material with high ion diffusion coefficient and preparation method and application thereof |
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