CN114146635A - Pre-granulation method of graphite negative electrode material - Google Patents
Pre-granulation method of graphite negative electrode material Download PDFInfo
- Publication number
- CN114146635A CN114146635A CN202111414756.7A CN202111414756A CN114146635A CN 114146635 A CN114146635 A CN 114146635A CN 202111414756 A CN202111414756 A CN 202111414756A CN 114146635 A CN114146635 A CN 114146635A
- Authority
- CN
- China
- Prior art keywords
- temperature
- minutes
- granulation method
- raising
- material according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005469 granulation Methods 0.000 title claims abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 22
- 239000010439 graphite Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007773 negative electrode material Substances 0.000 title claims description 13
- 230000003179 granulation Effects 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000007493 shaping process Methods 0.000 claims abstract description 13
- 239000011164 primary particle Substances 0.000 claims abstract description 11
- 239000003245 coal Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000000571 coke Substances 0.000 claims abstract description 7
- 230000000630 rising effect Effects 0.000 claims abstract description 5
- 239000010426 asphalt Substances 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims description 10
- 239000011311 coal-based needle coke Substances 0.000 claims description 6
- 239000010405 anode material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 5
- 239000010406 cathode material Substances 0.000 abstract description 5
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 5
- 229910021383 artificial graphite Inorganic materials 0.000 abstract description 3
- 239000011163 secondary particle Substances 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/10—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in stationary drums or troughs, provided with kneading or mixing appliances
-
- 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
-
- 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
Abstract
The invention relates to the field of lithium ion battery cathode materials, in particular to a pre-granulation method of a graphite cathode material, which comprises the following steps: s1, processing the coal-based coke by a shaping machine to obtain primary particles; s2, mixing the primary particles and asphalt through a mixer to obtain a mixture; and S3, adding the mixture into a roller furnace, and obtaining different granulation results by utilizing different temperature rising curves. The invention carries out temperature-rising curve treatment on the artificial graphite raw materials by different roller furnaces respectively, and then carries out blending treatment according to a certain proportion, thereby laying a cushion for obtaining a product which can give consideration to excellent charging and circulating performances of the secondary particle material and high tap density and high capacity performance of the single particle material.
Description
Technical Field
The invention relates to the field of lithium ion battery cathode materials, in particular to a pre-granulation method of a graphite cathode material.
Background
The lithium ion battery has the advantages of high specific energy, high working voltage, high charging and discharging speed, long cycle life, safety, no pollution and the like, has successfully replaced other secondary batteries, becomes a main energy source of small electronic products such as mobile phones, notebook computers, video cameras and the like, greatly promotes the industrialization process of electric automobiles, and has comprehensively started the development of the lithium ion battery in the fields of military affairs and aerospace in many countries, so that higher requirements are put forward for the lithium ion battery. With the continuous development of science and technology, the requirements of 3C electronic consumer products and new energy automobiles on graphite cathode materials are higher, and especially the requirements of energy automobiles on high power and rapid charge and discharge are great.
The single-particle graphite anode material cannot meet the development requirements of the existing new energy industry, cannot meet the excellent performances of quick charge, high capacity and the like, and therefore modification treatment aiming at graphite has become a research hotspot in recent years.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a pre-granulation method of a graphite negative electrode material having excellent properties.
The invention adopts the following technical scheme:
a pre-granulation method of a graphite negative electrode material comprises the following steps:
s1, processing the coal-based coke by a shaping machine to obtain primary particles;
s2, mixing the primary particles and asphalt through a mixer to obtain a mixture;
and S3, adding the mixture into a roller furnace, and obtaining different granulation results by utilizing different temperature rising curves.
In a further improvement of the above technical solution, in step S1, the shaping machine is a rolling, grinding and shaping integrated machine.
In a further improvement of the above technical solution, in the step S1, the coal-based coke is coal-based needle coke.
In a further improvement of the above technical solution, in the step S1, the volatile matter of the coal-based char is 5%.
In a further improvement of the above technical solution, in the step S1, the average particle diameter D50 of the primary particles is 8.0 μm.
In a further improvement of the above technical solution, in the step S2, the mixer is a V-type batch mixer.
In a further improvement of the above technical solution, in step S2, the rotation speed of the mixing is 250r/min, and the time of the mixing is 15 min.
In a further improvement of the above technical solution, in step S3, the specific temperature raising step is: raising the temperature from room temperature to 450 ℃ after 60 minutes, then preserving the heat at 450 ℃ for 30 minutes, raising the temperature to 500 ℃ after 30 minutes, preserving the heat for 120 minutes, raising the temperature to 520 ℃ after 20 minutes, preserving the heat for 30 minutes, finally reducing the temperature to 45 ℃, and discharging.
In a further improvement of the above technical solution, in step S3, the specific temperature raising step is: raising the temperature from room temperature to 450 ℃ after 60 minutes, then raising the temperature to 500 ℃ after 30 minutes, preserving the heat for 120 minutes, raising the temperature to 520 ℃ after 20 minutes, preserving the heat for 30 minutes, finally reducing the temperature to 45 ℃, and discharging.
The technical scheme is further improved in that in the step S3, the temperature is increased to 450 ℃ from room temperature after 60 minutes, the temperature is kept at 450 ℃ for 30 minutes, then the temperature is increased to 500 ℃ after 30 minutes, the temperature is increased to 520 ℃ after 20 minutes, the temperature is kept for 30 minutes, and finally the temperature is reduced to 45 ℃ to discharge.
The invention has the beneficial effects that:
the invention carries out temperature-rising curve treatment on the artificial graphite raw materials by different roller furnaces respectively, and then carries out blending treatment according to a certain proportion, thereby laying a cushion for obtaining a product which can give consideration to excellent charging and circulating performances of the secondary particle material and high tap density and high capacity performance of the single particle material.
Drawings
Fig. 1 is a scanning electron micrograph of a product of example 1 of a pre-granulation method of a graphite negative electrode material of the present invention;
fig. 2 is another scanning electron micrograph of the product of example 1 of the pre-granulation method for a graphite negative electrode material of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples for better understanding of the present invention, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1 and 2, a pre-granulation method of a graphite negative electrode material includes the following steps:
s1, processing the coal-based coke by a shaping machine to obtain primary particles;
s2, mixing the primary particles and asphalt through a mixer to obtain a mixture;
and S3, adding the mixture into a roller furnace, and obtaining different granulation results by utilizing different temperature rising curves.
In the step S1, the shaping machine is a rolling, grinding and shaping integrated machine.
In step S1, the coal-based coke is coal-based needle coke.
In step S1, the coal-based char has a volatile content of 5%.
In the step S1, the average particle diameter D50 of the primary particles was 8.0 μm.
In the step S2, the mixer is a V-type batch mixer.
In the step S2, the rotation speed of the mixing is 250r/min, and the mixing time is 15 min.
In step S3, the specific temperature raising step is: raising the temperature from room temperature to 450 ℃ after 60 minutes, then preserving the heat at 450 ℃ for 30 minutes, raising the temperature to 500 ℃ after 30 minutes, preserving the heat for 120 minutes, raising the temperature to 520 ℃ after 20 minutes, preserving the heat for 30 minutes, finally reducing the temperature to 45 ℃, and discharging.
In step S3, the specific temperature raising step is: raising the temperature from room temperature to 450 ℃ after 60 minutes, then raising the temperature to 500 ℃ after 30 minutes, preserving the heat for 120 minutes, raising the temperature to 520 ℃ after 20 minutes, preserving the heat for 30 minutes, finally reducing the temperature to 45 ℃, and discharging.
In the step S3, the temperature is raised to 450 ℃ from room temperature after 60 minutes, the temperature is preserved for 30 minutes at 450 ℃, then the temperature is raised to 500 ℃ after 30 minutes, the temperature is raised to 520 ℃ after 20 minutes, the temperature is preserved for 30 minutes, finally the temperature is lowered to 45 ℃, and the material is discharged.
Example 1
Raw materials of the coal-based needle coke after passing through the rough breaking, shaping and grading integrated machine are put into a roller furnace, a temperature rise program is set, the temperature is raised from room temperature to 450 ℃ after 60 minutes, then the temperature is preserved for 30 minutes at 450 ℃, the temperature is raised to 500 ℃ after 30 minutes, then the temperature is preserved for 120 minutes, the temperature is raised to 520 ℃ after 20 minutes, the temperature is preserved for 30 minutes, finally the temperature is lowered to 45 ℃, and discharging is carried out.
Example 2
Raw materials of the coal-based needle coke after passing through the rough breaking, shaping and grading integrated machine are put into a roller furnace, a temperature rising program is set, the temperature rises from room temperature to 450 ℃ after 60 minutes, then the temperature rises to 500 ℃ after 30 minutes, the temperature is preserved for 120 minutes, then the temperature rises to 520 ℃ after 20 minutes, the temperature is preserved for 30 minutes, finally the temperature is reduced to 45 ℃, and discharging is carried out.
Example 3
And (3) putting raw materials of the coal-based needle coke after passing through the rough breaking, shaping and grading integrated machine into a roller furnace, setting a temperature raising program, raising the temperature from room temperature to 450 ℃ after 60 minutes, preserving the heat at 450 ℃ for 30 minutes, raising the temperature to 500 ℃ after 30 minutes, raising the temperature to 520 ℃ after 20 minutes, preserving the heat for 30 minutes, finally lowering the temperature to 45 ℃, and discharging.
The products of examples 1-3 were tested individually and the results are shown in Table 1.
TABLE 1
| Experiment number | D50 particle size/. mu.m | Specific surface area/m2/kg | Tap density/g/cm3 |
| Example 1 | 17.87 | 0.98 | 1.01 |
| Example 2 | 15.20 | 1.16 | 1.34 |
| Example 3 | 13.46 | 1.43 | 1.52 |
The invention carries out temperature-rising curve treatment on the artificial graphite raw materials by different roller furnaces respectively, and then carries out blending treatment according to a certain proportion, thereby laying a cushion for obtaining a product which can give consideration to excellent charging and circulating performances of the secondary particle material and high tap density and high capacity performance of the single particle material.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The pre-granulation method of the graphite negative electrode material is characterized by comprising the following steps of:
s1, processing the coal-based coke by a shaping machine to obtain primary particles;
s2, mixing the primary particles and asphalt through a mixer to obtain a mixture;
and S3, adding the mixture into a roller furnace, and obtaining different granulation results by utilizing different temperature rising curves.
2. The pre-granulation method for the graphite anode material according to claim 1, wherein in the step S1, the shaping machine is a roll mill shaping machine.
3. The pre-granulation method for a graphite negative electrode material according to claim 1, wherein in step S1, the coal-based coke is a coal-based needle coke.
4. The pre-granulation method for a graphite negative electrode material according to claim 1, wherein in step S1, the coal-based char has a volatile content of 5%.
5. The pre-granulation method for a graphite anode material according to claim 1, wherein, in the step S1, the average particle diameter D50 of the primary particles is 8.0 μm.
6. The pre-granulation method for a graphite anode material according to claim 1, wherein in the step S2, the mixer is a V-type batch mixer.
7. The pre-granulation method for the graphite negative electrode material according to claim 1, wherein in the step S2, the rotation speed of the mixing is 250r/min, and the time of the mixing is 15 min.
8. The pre-granulation method for the graphite negative electrode material according to claim 1, wherein in the step S3, the specific temperature raising step is: raising the temperature from room temperature to 450 ℃ after 60 minutes, then preserving the heat at 450 ℃ for 30 minutes, raising the temperature to 500 ℃ after 30 minutes, preserving the heat for 120 minutes, raising the temperature to 520 ℃ after 20 minutes, preserving the heat for 30 minutes, finally reducing the temperature to 45 ℃, and discharging.
9. The pre-granulation method for the graphite negative electrode material according to claim 1, wherein in the step S3, the specific temperature raising step is: raising the temperature from room temperature to 450 ℃ after 60 minutes, then raising the temperature to 500 ℃ after 30 minutes, preserving the heat for 120 minutes, raising the temperature to 520 ℃ after 20 minutes, preserving the heat for 30 minutes, finally reducing the temperature to 45 ℃, and discharging.
10. The pre-granulation method for the graphite anode material according to claim 1, wherein in the step S3, the temperature is raised from room temperature to 450 ℃ over 60 minutes, the temperature is maintained at 450 ℃ for 30 minutes, then the temperature is raised to 500 ℃ over 30 minutes, the temperature is raised to 520 ℃ over 20 minutes, the temperature is maintained for 30 minutes, and finally the temperature is lowered to 45 ℃ to be discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111414756.7A CN114146635A (en) | 2021-11-25 | 2021-11-25 | Pre-granulation method of graphite negative electrode material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111414756.7A CN114146635A (en) | 2021-11-25 | 2021-11-25 | Pre-granulation method of graphite negative electrode material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114146635A true CN114146635A (en) | 2022-03-08 |
Family
ID=80457731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111414756.7A Pending CN114146635A (en) | 2021-11-25 | 2021-11-25 | Pre-granulation method of graphite negative electrode material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114146635A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114653302A (en) * | 2022-03-15 | 2022-06-24 | 上海杉杉新材料有限公司 | Granulation method of artificial graphite, granulated material, artificial graphite, preparation method and application of artificial graphite, and secondary battery |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5236468A (en) * | 1992-03-19 | 1993-08-17 | J. S. Mccormick Company | Method of producing formed carbonaceous bodies |
| JP2003173774A (en) * | 2001-12-04 | 2003-06-20 | Nippon Carbon Co Ltd | Anode material for lithium ion secondary battery and its manufacturing method and lithium ion secondary battery using same anode material |
| JP2014181169A (en) * | 2013-03-21 | 2014-09-29 | Ibiden Co Ltd | Method for manufacturing graphite material |
| CN104609400A (en) * | 2014-12-30 | 2015-05-13 | 东莞市凯金新能源科技有限公司 | Composite graphite cathode material and preparation method thereof |
| CN110642247A (en) * | 2019-09-30 | 2020-01-03 | 广东凯金新能源科技股份有限公司 | Artificial graphite negative electrode material, preparation method thereof and lithium ion battery |
| CN112573923A (en) * | 2020-12-10 | 2021-03-30 | 广东凯金新能源科技股份有限公司 | High-rate lithium ion battery artificial graphite negative electrode material and preparation method thereof |
| CN112670462A (en) * | 2020-03-31 | 2021-04-16 | 宁波杉杉新材料科技有限公司 | Pre-lithiated silicon monoxide-graphite composite negative electrode material and preparation method and application thereof |
| CN112811418A (en) * | 2020-12-31 | 2021-05-18 | 宁波杉杉新材料科技有限公司 | Fast-charging composite graphite material, preparation method and application thereof, and lithium ion battery |
| CN113526500A (en) * | 2021-07-20 | 2021-10-22 | 安徽科达新材料有限公司 | Preparation method of high-performance artificial graphite negative electrode material |
| WO2021221276A1 (en) * | 2020-04-28 | 2021-11-04 | 재단법인 포항산업과학연구원 | Anode material for lithium secondary battery, method for preparing same, and lithium secondary battery |
-
2021
- 2021-11-25 CN CN202111414756.7A patent/CN114146635A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5236468A (en) * | 1992-03-19 | 1993-08-17 | J. S. Mccormick Company | Method of producing formed carbonaceous bodies |
| JP2003173774A (en) * | 2001-12-04 | 2003-06-20 | Nippon Carbon Co Ltd | Anode material for lithium ion secondary battery and its manufacturing method and lithium ion secondary battery using same anode material |
| JP2014181169A (en) * | 2013-03-21 | 2014-09-29 | Ibiden Co Ltd | Method for manufacturing graphite material |
| CN104609400A (en) * | 2014-12-30 | 2015-05-13 | 东莞市凯金新能源科技有限公司 | Composite graphite cathode material and preparation method thereof |
| CN110642247A (en) * | 2019-09-30 | 2020-01-03 | 广东凯金新能源科技股份有限公司 | Artificial graphite negative electrode material, preparation method thereof and lithium ion battery |
| CN112670462A (en) * | 2020-03-31 | 2021-04-16 | 宁波杉杉新材料科技有限公司 | Pre-lithiated silicon monoxide-graphite composite negative electrode material and preparation method and application thereof |
| WO2021221276A1 (en) * | 2020-04-28 | 2021-11-04 | 재단법인 포항산업과학연구원 | Anode material for lithium secondary battery, method for preparing same, and lithium secondary battery |
| CN112573923A (en) * | 2020-12-10 | 2021-03-30 | 广东凯金新能源科技股份有限公司 | High-rate lithium ion battery artificial graphite negative electrode material and preparation method thereof |
| CN112811418A (en) * | 2020-12-31 | 2021-05-18 | 宁波杉杉新材料科技有限公司 | Fast-charging composite graphite material, preparation method and application thereof, and lithium ion battery |
| CN113526500A (en) * | 2021-07-20 | 2021-10-22 | 安徽科达新材料有限公司 | Preparation method of high-performance artificial graphite negative electrode material |
Non-Patent Citations (1)
| Title |
|---|
| 王邓军等: "锂离子电池负极材料用针状焦的石墨化机理及其储锂行为", 《无机材料学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114653302A (en) * | 2022-03-15 | 2022-06-24 | 上海杉杉新材料有限公司 | Granulation method of artificial graphite, granulated material, artificial graphite, preparation method and application of artificial graphite, and secondary battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105938906B (en) | A kind of lithium ion battery artificial composite cathode material of silicon/carbon/graphite and preparation method thereof | |
| CN111225888A (en) | Method for preparing negative active material and lithium secondary battery comprising same | |
| CN111792640B (en) | Spheroidal low-expansion high-capacity graphite negative electrode material, preparation method and lithium ion battery | |
| CN110395725B (en) | Quick-charging microcrystalline graphite negative electrode material and preparation method thereof | |
| CN110203923A (en) | A kind of lithium ion battery negative material and preparation method thereof | |
| CN106129522A (en) | A kind of preparation method utilizing lithium ion battery negative to reclaim graphite | |
| CN115432698B (en) | Carbon secondary particle and preparation method thereof, artificial graphite and preparation method thereof, lithium ion battery anode material and lithium ion battery | |
| CN114146635A (en) | Pre-granulation method of graphite negative electrode material | |
| CN112310362B (en) | High-capacity fast-charging negative electrode material for lithium ion battery and lithium ion battery | |
| CN109244385A (en) | A kind of lithium ion battery hard carbon cathode material and preparation method thereof | |
| CN110723730B (en) | High-specific-volume high-cycle-performance artificial graphite material and preparation method and application thereof | |
| CN105742636A (en) | Graphite negative electrode material for lithium-ion battery and preparation method of graphite negative electrode material | |
| CN113594450B (en) | Preparation method of coal-based artificial graphite cathode material for lithium ion battery | |
| CN219156517U (en) | Device for preparing artificial graphite negative electrode material for lithium ion battery | |
| CN102214821A (en) | Surface-modified graphitized intermediate-phase carbon micropowder and preparation method thereof | |
| CN114653302A (en) | Granulation method of artificial graphite, granulated material, artificial graphite, preparation method and application of artificial graphite, and secondary battery | |
| CN113363466A (en) | Low-cost graphite negative electrode material based on crucible crushed aggregates and preparation method thereof | |
| CN109244465B (en) | Preparation method of negative electrode material | |
| CN114314580A (en) | Composite graphite negative electrode material and preparation method and application thereof | |
| CN113697805A (en) | Quick-charging high-compaction high-capacity artificial graphite negative electrode material and preparation method thereof | |
| CN110729455A (en) | Preparation method of lithium ion negative electrode material and lithium ion negative electrode material | |
| CN112490443A (en) | Liquid-phase-coated graphite negative electrode material and preparation method thereof | |
| CN112599772A (en) | Method for recycling negative electrode material of lithium ion power battery | |
| CN109273713A (en) | A kind of power battery cathode shaping char particle and preparation method thereof | |
| CN111732096A (en) | Negative electrode material of high-power lithium ion battery and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220308 |
|
| RJ01 | Rejection of invention patent application after publication |