CN119240685A - Artificial graphite material and preparation method and application thereof - Google Patents
Artificial graphite material and preparation method and application thereof Download PDFInfo
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- CN119240685A CN119240685A CN202411290241.4A CN202411290241A CN119240685A CN 119240685 A CN119240685 A CN 119240685A CN 202411290241 A CN202411290241 A CN 202411290241A CN 119240685 A CN119240685 A CN 119240685A
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- 229910021383 artificial graphite Inorganic materials 0.000 title claims abstract description 47
- 239000007770 graphite material Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 238000005087 graphitization Methods 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 14
- 230000000996 additive effect Effects 0.000 claims abstract description 13
- 239000002243 precursor Substances 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052796 boron Inorganic materials 0.000 claims abstract description 5
- 239000011331 needle coke Substances 0.000 claims abstract description 5
- 239000002006 petroleum coke Substances 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000010703 silicon Substances 0.000 claims abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000010941 cobalt Substances 0.000 claims abstract description 4
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 239000011574 phosphorus Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 8
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 7
- 229910001416 lithium ion Inorganic materials 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 4
- 239000007773 negative electrode material Substances 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 239000006253 pitch coke Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 abstract description 12
- 239000010439 graphite Substances 0.000 abstract description 12
- 239000010426 asphalt Substances 0.000 abstract description 3
- 239000000571 coke Substances 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 description 7
- 229910021382 natural graphite Inorganic materials 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000008707 rearrangement Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000010405 anode material Substances 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- 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
- C01B32/20—Graphite
- C01B32/205—Preparation
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention relates to the field of graphite, in particular to an artificial graphite material and a preparation method and application thereof. The artificial graphite material comprises, by weight, 80% -95% of a carbon source, 1% -5% of a catalyst, and 0% -10% of an additive, wherein the raw materials are uniformly mixed to obtain a mixed material, the mixed material is subjected to heat treatment in an inert atmosphere to obtain a precursor material, and the precursor material is subjected to graphitization treatment at a high temperature to obtain the artificial graphite material. According to the artificial graphite material and the preparation method and application thereof, the performances of the material are obviously improved by reasonably adjusting the proportion of the carbon source, the catalyst and the additive, wherein the carbon source comprises petroleum coke, needle coke, asphalt coke and the like, the catalyst comprises iron, cobalt, nickel and the like, the additive comprises silicon, boron, phosphorus and the like, and the reasonable proportion of the raw materials can improve the performances of the material such as conductivity, thermal stability, mechanical strength and the like.
Description
Technical Field
The invention relates to the field of graphite, in particular to an artificial graphite material and a preparation method and application thereof.
Background
With the rapid development of the lithium ion battery industry, graphite is widely used as a negative electrode material of batteries. Although natural graphite has the advantages of cost and specific capacity, artificial graphite has more excellent performance in cycle performance, safety performance and charge-discharge multiplying power, and the market occupation rate is stabilized to be more than 80 percent at present. Graphitization is a key process for producing artificial graphite, a carbonaceous material is heated to 2300-3000 ℃, thermodynamic unstable carbon atoms are converted orderly from a disordered layer structure to a graphite crystal structure by thermal activation, the energy for converting the graphite crystal structure and rearranging atoms is derived from high-temperature heat treatment, the interlayer spacing of graphite is gradually reduced along with the increase of temperature, the change is obvious from 0.343-0.346nm, the change is gradually slow from 2500 ℃ to 3000 ℃ until the whole graphitization is completed. The process needs to consume a large amount of energy, belongs to a high energy consumption link, and in the current artificial graphite cost structure, graphitization accounts for about 50 percent, and is an important link for reducing the cost of the current negative electrode material.
Graphite is used as a unique carbon material, and is widely applied to the fields of lithium ion batteries, supercapacitors, conductive agents and the like by virtue of excellent electrical conductivity, thermal conductivity, high temperature resistance and chemical stability, thereby playing a vital role. In lithium ion batteries, graphite is generally used as a negative electrode material, and its layered structure is capable of efficiently intercalating and deintercalating lithium ions, providing excellent energy storage capacity and long cycle life. In the super capacitor, the high specific surface area and good conductivity of the graphite material enable the super capacitor to conduct electrons rapidly, and efficient energy storage and release are achieved. In addition, as a conductive agent, graphite is also widely used in various electronic devices to improve the overall conductivity and working efficiency of the material.
However, natural graphite resources are relatively limited, focusing mainly on a few geographical areas, which results in a geographical limitation of the graphite supply, susceptible to fluctuations in the global supply chain. More importantly, the quality of the natural graphite has significant differences among different mining areas, and the graphitization degree, purity and crystal structure of the natural graphite are unbalanced, so that the performance of the natural graphite in practical application is unstable, and the quality consistency and performance controllability of the final product are affected. Thus, reliance on natural graphite resources presents challenges in meeting industry requirements.
Therefore, it is necessary to provide a new artificial graphite material, and a preparation method and application thereof, so as to solve the technical problems.
Disclosure of Invention
In order to overcome the defects existing in the prior art, an artificial graphite material, a preparation method and application thereof are provided so as to solve the problems.
The invention provides an artificial graphite material and a preparation method and application thereof, wherein the artificial graphite material comprises the following steps:
Step S1, weighing the raw materials, 80-95% of carbon source, 1-5% of catalyst and 0-10% of additive according to weight percentage;
step S2, uniformly mixing the raw materials to obtain a mixture;
Step S3, performing heat treatment on the mixture in an inert atmosphere to obtain a precursor material;
And S4, graphitizing the precursor material at high temperature to obtain the artificial graphite material.
Preferably, the carbon source is one or more of petroleum coke, needle coke and pitch coke, the catalyst is one or more of iron, cobalt and nickel, and the additive is one or more of silicon, boron and phosphorus.
Preferably, the heat treatment temperature is 800-1200 ℃ and the time is 2-8 hours.
Preferably, the graphitization temperature is 2500-3000 ℃ and the time is 10-30 hours.
Preferably, in the heat treatment process, a temperature programming mode is adopted, and the temperature raising rate is 2-10 ℃ per minute.
Preferably, in the graphitization process, inert gas is used for protection, and the pressure is 0.1-1.0MPa.
An artificial graphite material is prepared by the method.
Preferably, the true density of the artificial graphite material is 1.9-2.2g/cm 3, the porosity of the artificial graphite material is 5-15%, and the conductivity of the artificial graphite material is 1000-2000S/m.
Preferably, the tensile strength of the artificial graphite material is 50-100MPa, and the bending strength of the artificial graphite material is 80-150MPa.
Preferably, the artificial graphite material is suitable for a lithium ion battery anode material.
Compared with the related art, the artificial graphite material, the preparation method and the application thereof have the following beneficial effects:
The invention can obviously improve the performance of the material by reasonably adjusting the proportion of the carbon source, the catalyst and the additive, wherein the carbon source comprises petroleum coke, needle coke, asphalt coke and the like, the catalyst comprises iron, cobalt, nickel and the like, the additive comprises silicon, boron, phosphorus and the like, and the reasonable proportion of the raw materials can improve the performances of the material such as conductivity, thermal stability, mechanical strength and the like.
The invention realizes the remarkable improvement of the material performance through optimizing the heat treatment and graphitization process. In the heat treatment stage, the temperature is precisely controlled within the range of 800-1200 ℃, and the temperature interval ensures that the precursor material can complete sufficient reaction without severe decomposition and provides necessary heat energy support for subsequent structural rearrangement. The heat treatment time is 2-8 hours, which not only ensures the sufficiency of the reaction, but also avoids the increase of energy consumption and excessive change of materials caused by overlong time. By adopting a temperature programming mode, the temperature rising rate is controlled at 2-10 ℃ per minute, excessive thermal stress generated in the material can be avoided through a slow temperature rising process, the damage of a crystal structure is prevented, the reaction between a carbon source and a catalyst is ensured to be more uniform, and the structural ordering of the material is promoted.
In the graphitization stage, the temperature is strictly controlled between 2500-3000 ℃, and the higher temperature promotes the rearrangement of carbon atoms to form a more regular graphite crystal structure, so that the graphitization degree of the material is improved. The graphitization process lasts for 10-30 hours, and the extension of the time is favorable for migration and rearrangement of carbon atoms, so that the order of graphite crystals is further improved. In the process, inert gas is adopted for protection, so that the material is prevented from reacting with oxygen or other impurities in the environment, and the purity and stability of the material are ensured. In addition, the graphitization process can be accelerated by operating under the pressure of 0.1-1.0MPa, and the conductivity and the thermal stability of the material are further enhanced. The optimization scheme ensures that the final material has excellent conductive performance and high temperature resistance, greatly expands the application potential in the fields of electronic devices, energy storage equipment and the like, and simultaneously improves the long-term stability and the service life of the material.
Drawings
FIG. 1 is a table parameter diagram of a preferred embodiment of an artificial graphite material, a method for preparing the same, and applications thereof;
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
Example 1
The embodiment of the invention provides an artificial graphite material, a preparation method and application thereof, and the artificial graphite material, the preparation method and the application thereof comprise the following steps:
the raw materials comprise 90% of carbon source, 90% of petroleum coke, 3% of catalyst, and 7% of additive silicon.
The preparation method comprises the following steps:
S1, weighing the raw materials according to the weight percentage;
Step S2, uniformly mixing the raw materials, and mixing the raw materials by using a high-speed stirrer or a ball mill;
Step S3, carrying out heat treatment on the mixture under an inert atmosphere (such as argon), wherein the temperature is 900 ℃, the time is 4 hours, and the temperature rising rate is 5 ℃ per minute;
step S4, graphitizing the precursor material obtained by heat treatment at a high temperature of 2800 ℃ for 15 hours under the protection of argon gas at a pressure of 0.5MPa;
And S5, cooling, crushing and screening the graphitized material to obtain the final artificial graphite material.
Example 2
The raw materials comprise 90% of carbon source, 90% of needle coke, 5% of catalyst, and 5% of additive boron.
The preparation method comprises the following steps:
S1, weighing the raw materials according to the weight percentage;
Step S2, uniformly mixing the raw materials, and mixing the raw materials by using a high-speed stirrer or a ball mill;
step S3, carrying out heat treatment on the mixture under an inert atmosphere (such as nitrogen), wherein the temperature is 1000 ℃, the time is 6 hours, and the temperature rising rate is 8 ℃ per minute;
Step S4, graphitizing the precursor material obtained by heat treatment at a high temperature of 2600 ℃ for 20 hours under the protection of nitrogen, wherein the pressure is 0.8MPa;
And S5, cooling, crushing and screening the graphitized material to obtain the final artificial graphite material.
Example 3
The raw materials comprise 88% of carbon source, 88% of asphalt coke, 4% of catalyst, and 8% of additive.
S1, weighing the raw materials according to the weight percentage;
Step S2, uniformly mixing the raw materials, and mixing the raw materials by using a high-speed stirrer or a ball mill;
S3, carrying out heat treatment on the mixture under an inert atmosphere (such as helium), wherein the temperature is 1100 ℃, the time is 8 hours, and the temperature rising rate is 3 ℃ per minute;
step S4, graphitizing the precursor material obtained by heat treatment at a high temperature of 2900 ℃ for 10 hours, wherein helium protection is adopted, and the pressure is 0.3MPa;
And S5, cooling, crushing and screening the graphitized material to obtain the final artificial graphite material.
From examples 1-3, it is known that the structure and properties of the artificial graphite material can be effectively adjusted by finely adjusting the ratio of the carbon source, the catalyst and the additive, and controlling the process conditions of the heat treatment and graphitization. Specifically, the synergistic effect of the carbon source and the catalyst determines the graphitization degree, and the introduction of different additives can further optimize the key parameters such as conductivity, specific surface area, pore structure and the like of the material. The process conditions such as temperature, time and atmosphere of heat treatment also significantly influence the crystal structure and interlayer spacing of the graphite material, which is directly related to the application performance of the graphite material in the energy storage field. Therefore, by precisely controlling the variables, the artificial graphite material meeting different application requirements can be designed. For example, in lithium ion batteries, such materials can effectively increase the cycle life and energy density of the battery, while in supercapacitors, artificial graphite can provide excellent rapid charge and discharge performance and long life stability. These improvements not only expand the application range of artificial graphite materials in the prior art, but also provide new possibilities for the development of future energy storage technologies. .
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present invention.
Claims (10)
1. An artificial graphite material and a preparation method thereof are characterized by comprising the following steps:
Step S1, weighing the raw materials, 80-95% of carbon source, 1-5% of catalyst and 0-10% of additive according to weight percentage;
step S2, uniformly mixing the raw materials to obtain a mixture;
Step S3, performing heat treatment on the mixture in an inert atmosphere to obtain a precursor material;
And S4, graphitizing the precursor material at high temperature to obtain the artificial graphite material.
2. The artificial graphite material, the preparation method and the application thereof according to claim 1, wherein the carbon source is one or more of petroleum coke, needle coke and pitch coke, the catalyst is one or more of iron, cobalt and nickel, and the additive is one or more of silicon, boron and phosphorus.
3. The artificial graphite material, the preparation method and the application thereof according to claim 2, wherein the heat treatment temperature is 800-1200 ℃ and the time is 2-8 hours.
4. An artificial graphite material as claimed in claim 3, wherein the graphitization temperature is 2500-3000 ℃ and the time is 10-30 hours.
5. The artificial graphite material, the preparation method and the application thereof according to claim 4, wherein a temperature programming mode is adopted in the heat treatment process, and the temperature raising rate is 2-10 ℃ per minute.
6. The artificial graphite material, the preparation method and the application thereof according to claim 5, wherein inert gas is used for protection in the graphitization process, the pressure is 0.1-1.0MPa, and the inert gas comprises but is not limited to one of argon and nitrogen.
7. An artificial graphite material prepared by the method of any one of claims 1 to 6.
8. The artificial graphite material of claim 7, wherein the artificial graphite material has a true density of 1.9 to 2.2g/cm 3, a porosity of 5 to 15%, and an electrical conductivity of 1000 to 2000S/m.
9. The artificial graphite material according to claim 8, wherein the artificial graphite material has a tensile strength of 50 to 100MPa and a bending strength of 80 to 150MPa.
10. The artificial graphite material of claim 9, wherein the artificial graphite material is suitable for use as a negative electrode material for a lithium ion battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411290241.4A CN119240685A (en) | 2024-09-14 | 2024-09-14 | Artificial graphite material and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411290241.4A CN119240685A (en) | 2024-09-14 | 2024-09-14 | Artificial graphite material and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN119240685A true CN119240685A (en) | 2025-01-03 |
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| CN202411290241.4A Pending CN119240685A (en) | 2024-09-14 | 2024-09-14 | Artificial graphite material and preparation method and application thereof |
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| Country | Link |
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| CN (1) | CN119240685A (en) |
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