CN114715875B - Preparation method of thin-layer carbon-based material and application of thin-layer carbon-based material as battery material - Google Patents
Preparation method of thin-layer carbon-based material and application of thin-layer carbon-based material as battery material Download PDFInfo
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- CN114715875B CN114715875B CN202210353650.9A CN202210353650A CN114715875B CN 114715875 B CN114715875 B CN 114715875B CN 202210353650 A CN202210353650 A CN 202210353650A CN 114715875 B CN114715875 B CN 114715875B
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- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 title abstract description 24
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 49
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 24
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 24
- 239000010426 asphalt Substances 0.000 claims abstract description 24
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 16
- 239000010431 corundum Substances 0.000 claims abstract description 16
- 239000011259 mixed solution Substances 0.000 claims abstract description 15
- 238000000227 grinding Methods 0.000 claims abstract description 10
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000000137 annealing Methods 0.000 claims abstract description 9
- 229910001414 potassium ion Inorganic materials 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052786 argon Inorganic materials 0.000 claims abstract description 8
- 238000010000 carbonizing Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000007773 negative electrode material Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 238000003760 magnetic stirring Methods 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 239000010406 cathode material Substances 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000010923 batch production Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 31
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910021389 graphene Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000001069 Raman spectroscopy Methods 0.000 description 2
- 238000003917 TEM image Methods 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000001237 Raman spectrum Methods 0.000 description 1
- IUHFWCGCSVTMPG-UHFFFAOYSA-N [C].[C] Chemical group [C].[C] IUHFWCGCSVTMPG-UHFFFAOYSA-N 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The application provides a preparation method of a thin-layer carbon base and application of the thin-layer carbon base as a cathode material of a potassium ion battery, wherein a certain amount of melamine and ammonium chloride are fully ground and then dispersed in a certain volume of N, N-dimethylformamide, a proper amount of asphalt is added, magnetic stirring is carried out to obtain a turkish mixed solution, then N, N-dimethylformamide is evaporated in a water bath, and asphalt coated melamine and ammonium chloride powder is obtained by grinding; transferring the obtained powder into a corundum crucible, then transferring the corundum crucible into a tube furnace, sintering, annealing and carbonizing under the protection of argon, and naturally cooling to room temperature to obtain the black ultrathin wrinkled thin-layer carbon-based material. Electrochemical experiments prove that the carbon-based material prepared by the application has application prospect as a cathode material of a potassium ion battery. The preparation process of the material is simple, easy to operate, low in raw material cost, low in equipment investment and suitable for batch production.
Description
Technical Field
The application relates to the technical field of material chemical energy, in particular to a preparation method of a thin-layer carbon-based material and application of the thin-layer carbon-based material as a battery material.
Background
Among the numerous negative electrode materials, carbon-based materials have been of great interest in alkaline ion battery applications. The main advantages of carbon-based materials are their high abundance, adjustable interlayer spacing and structural properties. But the volume expansion effect, conductivity, safety, etc. have been deadly short plates of carbon-based materials in potassium ion battery applications. Thus, in the conventional modification method, the carbon-based material is: 1. carbon-carbon atom structure regulation (ADVANCED MATERIALS,2018,30 (48): 1802104); 2. carbon micro-nanostructure modulation (ADVANCED ENERGY MATERIALS,2020: 2000808); 3. heterojunction coupling modulation and the like (ACS ENERGY LETTERS, 2020). Carbon and allotropes thereof are proved to be a material with very high application value, and especially the application of graphitized carbon materials in lithium ion batteries is known as one of the most important inventions in the 20 th century. However, the production process of graphene is complex and expensive. Current research shows that the morphology of a product is controlled by solid phase reaction and by means of the composition structure of the material, and the thickness and the wrinkling degree of the material are regulated and controlled by controlling the mass ratio of a material precursor to a product material precursor. The ultrathin graphene-like layered structure can inhibit the volume expansion effect of the material in the potassium ion deintercalation process, and simultaneously can enlarge the contact area of the electrode material and the electrolyte to shorten the migration distance of the electrolyte, so that the ultrathin graphene-like layered structure has a huge application prospect in the aspect of battery materials.
Disclosure of Invention
In view of the above, the present application is directed to a method for preparing a thin-layer carbon-based material and its use as a battery material.
Based on the above object, the first aspect of the present application provides a method for preparing a thin layer carbon-based material, which uses melamine and asphalt as main raw materials, adds a proper amount of ammonium chloride (NH 4 Cl) as a regulator, uses N, N-Dimethylformamide (DMF) as a solvent, and comprises the steps of evaporating the mixture to dryness in a water bath at 90 ℃, and then sintering, annealing and carbonizing the mixture at 1100 ℃ to obtain the thin layer carbon-based material, wherein the method specifically comprises the following steps:
1) Weighing a certain amount of melamine (C 3H6N6) and ammonium chloride (NH 4 Cl), grinding for 1h to fully mix, dispersing into DMF solution, and stirring for 30min to obtain milky mixed solution;
2) Weighing a certain amount of asphalt, adding the asphalt into the mixed solution, magnetically stirring for 6 hours, evaporating DMF in a water bath at 90 ℃, and grinding to obtain powder of asphalt coated with melamine and ammonium chloride;
3) And placing the obtained powder into a corundum crucible, transferring the corundum crucible into a tube furnace, performing program temperature control sintering annealing carbonization under the protection of argon, and naturally cooling to room temperature to obtain the black ultrathin wrinkled thin-layer carbon-based material, namely the thin-layer carbon-based material.
Further, the mass ratio of substances in the powder material is melamine: ammonium chloride = 4:1, melamine+ammonium chloride: pitch = 10-50: 1.
Further, the melamine and ammonium chloride species are chemically pure.
Further, the asphalt is petroleum asphalt purchased in the market.
Based on the same inventive concept, a second aspect of the present application provides a thin layer carbon-based material prepared by the preparation method described in the first aspect.
Based on the same inventive concept, the third aspect of the application provides an application of a thin-layer carbon-based material as a negative electrode material of a potassium ion battery, wherein the material is used as the negative electrode material of the potassium ion battery, the specific discharge capacity of the material is kept above 147.6mAh g -1 and the coulomb efficiency is above 99.6% after 1800 charge and discharge cycles under the current density of 1000 mAg -1.
From the above, the preparation method of the thin-layer carbon-based material and the application of the thin-layer carbon-based material as a battery material provided by the application are characterized in that the specific combination of melamine, asphalt, ammonium chloride and DMF and the preparation process parameters play a key role in the morphology and composition structure of the prepared thin-layer carbon-based material, so that the prepared thin-layer carbon-based material has a specific Raman absorption spectrum, the specific surface of the prepared thin-layer carbon-based material is provided with 141.23m 2 g-1, the morphology of the material is in the shape of ultrathin wrinkled graphene sheets, and the discharge specific capacity of the prepared thin-layer carbon-based material is kept above 147.6mAh g -1 and the coulombic efficiency is above 99.6% after the charge-discharge cycle is performed 1800 times under the current density of 1000mA g -1.
Drawings
In order to more clearly illustrate the technical solutions of the present application or related art, the drawings that are required to be used in the description of the embodiments or related art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort to those of ordinary skill in the art.
FIG. 1 is a graph showing the absorption and desorption of N 2 of a thin-layer carbon-based material prepared in the example of the present application;
FIG. 2 is an SEM image of a thin layer carbon-based material prepared according to an embodiment of the present application;
FIG. 3 is a TEM image of a thin layer carbon-based material prepared according to an embodiment of the present application;
FIG. 4 is another TEM image of a thin layer carbon-based material prepared according to an embodiment of the present application;
FIG. 5 is an XRD pattern of a thin layer carbon-based material prepared in accordance with an embodiment of the present application;
FIG. 6 is a Raman spectrum of a thin-layer carbon-based material prepared according to an embodiment of the present application;
Fig. 7 is a schematic diagram showing charge-discharge cycle performance of a thin-layer carbon-based material prepared in the embodiment of the present application as a negative electrode of a potassium ion battery.
Detailed Description
For the purposes of promoting an understanding of the principles and advantages of the disclosure, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same.
It should be noted that unless otherwise defined, technical terms used in the following examples have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.
Example 1
Melamine (8.0 g) and ammonium chloride (2.0 g) are weighed, ground for 1h to be fully mixed, then dispersed into 100mL of N, N-dimethylformamide, and stirred for 30min to obtain a milky mixed solution; asphalt (1.0 g) is weighed and added into the mixed solution, magnetic stirring is carried out for 6 hours, then N, N-dimethylformamide is distilled off in a water bath at 90 ℃, and asphalt-coated melamine and ammonium chloride powder is obtained by grinding; transferring the obtained powder into a corundum crucible, then transferring the corundum crucible into a tube furnace, heating to 600 ℃ for 2 hours at 2 ℃ in -1 under the protection of argon, heating to 800 ℃ for 2 hours at 4 ℃ in -1, heating to 1100 ℃ for 3 hours at 5 ℃ in -1, annealing and carbonizing, and naturally cooling to room temperature to obtain the black ultrathin wrinkled thin-layer carbon-based material.
Example 2
Melamine (16.0 g) and ammonium chloride (4.0 g) are weighed, ground for 1h to be fully mixed, then dispersed into 200mL of N, N-dimethylformamide, and stirred for 30min to obtain a milky mixed solution; asphalt (1.0 g) is weighed and added into the mixed solution, magnetic stirring is carried out for 6 hours, then N, N-dimethylformamide is evaporated in a water bath at 90 ℃, and asphalt-coated melamine and ammonium chloride powder is obtained by grinding; transferring the obtained powder into a corundum crucible, then transferring the corundum crucible into a tube furnace, heating to 600 ℃ for 2 hours at 2 ℃ in -1 under the protection of argon, heating to 800 ℃ for 2 hours at 4 ℃ in -1, heating to 1100 ℃ for 3 hours at 5 ℃ in -1, annealing and carbonizing, and naturally cooling to room temperature to obtain the black ultrathin wrinkled thin-layer carbon-based material.
Example 3
Melamine (24.0 g) and ammonium chloride (6.0 g) were weighed, ground for 1 hour to be thoroughly mixed, then dispersed into 300ml of N, N-dimethylformamide, and stirred for 30min to obtain a milky mixed solution; asphalt (1.0 g) is weighed and added into the mixed solution, magnetic stirring is carried out for 6 hours, then N, N-dimethylformamide is evaporated in a water bath at 90 ℃, and asphalt-coated melamine and ammonium chloride powder is obtained by grinding; transferring the obtained powder into a corundum crucible, then transferring the corundum crucible into a tube furnace, heating to 600 ℃ for 2 hours at 2 ℃ in -1 under the protection of argon, heating to 800 ℃ for 2 hours at 4 ℃ in -1, heating to 1100 ℃ for 3 hours at 5 ℃ in -1, annealing and carbonizing, and naturally cooling to room temperature to obtain the black ultrathin wrinkled thin-layer carbon-based material.
Example 4
Melamine (32.0 g) and ammonium chloride (8.0 g) are weighed, ground for 1h to be fully mixed, then dispersed into 300ml of N, N-dimethylformamide, and stirred for 30min to obtain a milky mixed solution; asphalt (1.0 g) is weighed and added into the mixed solution, magnetic stirring is carried out for 6 hours, then N, N-dimethylformamide is evaporated in a water bath at 90 ℃, and asphalt-coated melamine and ammonium chloride powder is obtained by grinding; transferring the obtained powder into a corundum crucible, then transferring the corundum crucible into a tube furnace, heating to 600 ℃ for 2 hours at 2 ℃ in -1 under the protection of argon, heating to 800 ℃ for 2 hours at 4 ℃ in -1, heating to 1100 ℃ for 3 hours at 5 ℃ in -1, annealing and carbonizing, and naturally cooling to room temperature to obtain the ultra-black thin-fold thin-layer carbon-based material.
Example 5
Melamine (40.0 g) and ammonium chloride (10.0 g) are weighed, ground for 1h to be fully mixed, then dispersed into 300ml of N, N-dimethylformamide, and stirred for 30min to obtain a milky mixed solution; asphalt (1.0 g) is weighed and added into the mixed solution, magnetic stirring is carried out for 6 hours, then N, N-dimethylformamide is evaporated in a water bath at 90 ℃, and asphalt-coated melamine and ammonium chloride powder is obtained by grinding; transferring the obtained powder into a corundum crucible, then transferring the corundum crucible into a tube furnace, heating to 600 ℃ for 2 hours at 2 ℃ in -1 under the protection of argon, heating to 800 ℃ for 2 hours at 4 ℃ in -1, heating to 1100 ℃ for 3 hours at 5 ℃ in -1, annealing and carbonizing, and naturally cooling to room temperature to obtain the black ultrathin wrinkled thin-layer carbon-based material.
The following are the phase appearance and electrochemical performance parameter tests of the materials:
The thin-layer carbon-based materials prepared in examples 1 to 5 were tested for specific surface area and pore structure by a specific surface adsorption instrument (fig. 1); observing the morphology of the material by using a scanning electron microscope (SEM, figure 2) and a transmission scanning electron microscope (TEM, figures 3 and 4), and displaying that the material presents an ultrathin wrinkled graphene lamellar structure, wherein the lamellar thickness is about 60nm; the composition of the material tested with a powder X-ray diffraction (XRD) spectrometer showed a strong absorption peak at 25.63 degrees (fig. 5); raman spectroscopic testing showed two strong absorption peaks at 1350cm -1 and 1585cm -1 (fig. 6);
The prepared thin-layer carbon-based material is used as a cathode material of a potassium ion battery for electrochemical performance test, and the electrochemical performance test shows that the specific discharge capacity is kept above 147.6mAh g -1 and the coulomb efficiency is above 99.6% after 1800 charge and discharge cycles at a current density of 1000mA g -1 (figure 7).
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined under the idea of the present disclosure, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in details for the sake of brevity.
The disclosed embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Accordingly, any omissions, modifications, equivalents, improvements, and the like, which are within the spirit and principles of the embodiments of the disclosure, are intended to be included within the scope of the disclosure.
Claims (3)
1. A method for preparing a thin layer carbon-based material, comprising:
1) Weighing a certain amount of melamine and ammonium chloride, grinding for 1h to fully mix, dispersing into a certain volume of N, N-dimethylformamide solution, and stirring for 30min to obtain a milky mixed solution;
2) Weighing a certain amount of asphalt, adding the asphalt into the mixed solution, magnetically stirring for 6 hours, evaporating N, N-dimethylformamide in a water bath at 90 ℃, and grinding to obtain powder of melamine and ammonium chloride coated with asphalt;
3) Placing the obtained powder into a corundum crucible, transferring the corundum crucible into a tube furnace, heating to 600 ℃ for 2 hours at 2 ℃ for -1 under the protection of argon, heating to 800 ℃ for 2 hours at 4 ℃ for -1, heating to 1100 ℃ for 3 hours at 5 ℃ for -1, annealing and carbonizing, and naturally cooling to room temperature to obtain a black ultrathin wrinkled thin-layer carbon-based material;
Wherein, the mass ratio of each substance in the powder is melamine: ammonium chloride = 4:1, melamine+ammonium chloride: pitch = 10-50: 1, a step of;
The melamine and the ammonium chloride are chemically pure;
The asphalt is petroleum asphalt purchased in the market.
2.A thin-layer carbon-based material, characterized in that it is prepared by the preparation method according to claim 1.
3. The application of the thin-layer carbon-based material is characterized in that the thin-layer carbon-based material prepared in the method is used as a negative electrode material of a potassium ion battery, the specific discharge capacity of the thin-layer carbon-based material is kept above 147.6mAh g -1 and the coulomb efficiency is above 99.6% after the thin-layer carbon-based material is subjected to charge and discharge circulation 1800 times under the current density of 1000mAg -1.
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| CN109970043A (en) * | 2019-04-08 | 2019-07-05 | 中国石油大学(华东) | Nitrogen-phosphorus co-doped carbon nanosheet and preparation method thereof, electrode for alkali metal ion battery, alkali metal ion battery and electric device |
| CN110642238A (en) * | 2019-10-16 | 2020-01-03 | 河北省科学院能源研究所 | Graphene-like nitrogen-doped porous carbon material, preparation method and application thereof |
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| CN101823705B (en) * | 2009-03-04 | 2012-08-01 | 南京大学 | Method for preparing high-surface-area nitrogenous mesoporous carbon material |
| KR101574623B1 (en) * | 2014-03-04 | 2015-12-04 | 전자부품연구원 | Negative active material, lithium secondary battery comprising the negative active material and manufacturing method thereof |
| CN105185963B (en) * | 2015-09-08 | 2017-07-21 | 湖北工程学院 | Rich nitrogen type carbon composite electrode material of a kind of high-performance and preparation method thereof |
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| KR102219747B1 (en) * | 2017-02-07 | 2021-02-24 | 와커 헤미 아게 | Core-shell composite particles for anode material in lithium-ion batteries |
| KR101977951B1 (en) * | 2017-10-30 | 2019-05-13 | 서울대학교산학협력단 | Method for producing nitrogen-doped porous carbon |
| CN108910859A (en) * | 2018-07-16 | 2018-11-30 | 东华大学 | A kind of preparation method of Metal Supported N doping bulk porous carbon materials |
| CN109301220A (en) * | 2018-10-10 | 2019-02-01 | 东北大学秦皇岛分校 | A kind of nitrogen-doped hard carbon material, its preparation method and potassium ion battery as negative electrode |
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| CN109970043A (en) * | 2019-04-08 | 2019-07-05 | 中国石油大学(华东) | Nitrogen-phosphorus co-doped carbon nanosheet and preparation method thereof, electrode for alkali metal ion battery, alkali metal ion battery and electric device |
| CN110642238A (en) * | 2019-10-16 | 2020-01-03 | 河北省科学院能源研究所 | Graphene-like nitrogen-doped porous carbon material, preparation method and application thereof |
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