CN110212186A - A kind of preparation method of high multiplying power lithium ion battery graphite cathode material - Google Patents
A kind of preparation method of high multiplying power lithium ion battery graphite cathode material Download PDFInfo
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- CN110212186A CN110212186A CN201910508562.XA CN201910508562A CN110212186A CN 110212186 A CN110212186 A CN 110212186A CN 201910508562 A CN201910508562 A CN 201910508562A CN 110212186 A CN110212186 A CN 110212186A
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- 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
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- 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
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- H—ELECTRICITY
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- 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
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- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
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- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
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Abstract
The invention discloses a kind of preparation method of high multiplying power lithium ion battery graphite cathode material, main following steps (1) are chosen raw graphite particles and are crushed；(2) by smashed material screening；(3) resulting screenings graphitization；(4) graphitization product are mixed with covering；(5) it is handled 3~8 hours under conditions of 400~600 DEG C, ammonia flow and obtains graphite second particle；(6) graphite second particle is sent to vibromill, the sphericity of graphitization product is adjusted by vibromill.Graphite cathode material obtained by the preparation method of high multiplying power lithium ion battery graphite cathode material provided by the invention has many advantages, such as preferable tap density, higher capacity and high rate performance.
Description
Technical field
The present invention relates to technical field of lithium ion battery negative, in particular to a kind of high multiplying power lithium ion battery graphite
The preparation method of negative electrode material.
Background technique
Lithium ion battery has many advantages, such as that energy density is big, environmental-friendly, long service life, be widely used in electric vehicle,
The fields such as electronic product.Anode, cathode in lithium ion battery play great influence to the performance of battery, at present lithium ion battery
Negative electrode material be mainly graphite.In the prior art, mainly by improving negative electrode material in graphite kernel outer cladding soft carbon
Can, but will cause a degree of energy density loss；In addition, the technical solution can not further improve graphite cathode material
The high rate performance of material, it is difficult to meet lithium ion battery to powerful performance requirement.Therefore, it is necessary to propose a kind of new high power
The preparation method of rate graphite negative material of lithium ion battery can further increase the high rate performance of graphite cathode material.
As it can be seen that the prior art could be improved and improve.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of high multiplying power lithium ion battery stones
The preparation method of black negative electrode material, it is intended to solve the general technical problem of graphite cathode material high rate performance in the prior art.
In order to achieve the above object, this invention takes following technical schemes:
A kind of preparation method of high multiplying power lithium ion battery graphite cathode material, which comprises the following steps:
(1) choosing partial size is the graphite particle less than 8mm as raw material, and the raw material is crushed；
(2) smashed raw material is obtained into screenings by vibrating screen, the sieve mesh number range of vibrating screen is 300~400
Mesh；
(3) the resulting powder of step (2) is subjected to graphitization processing and obtains graphitization product；
(4) the resulting graphitization product of step (3) are mixed with covering and obtains powder, the covering is pitch or tree
The weight ratio of rouge, covering and screenings is (1: 100)~(8: 100)；
(5) step (4) resulting powder is handled 3~8 hours under conditions of 400~600 DEG C, ammonia flow and obtains graphite
Second particle；
(6) by step (5), treated that graphite second particle is sent to vibromill, passes through the ball that vibromill adjusts graphitization product
Shape degree.
Further, in the preparation method of the high multiplying power lithium ion battery graphite cathode material, graphite in step (1)
Particle is petroleum coke particles or needle coke particles.
Further, in the preparation method of the high multiplying power lithium ion battery graphite cathode material, vibration in step (2)
The sieve mesh number of sieve is 400 mesh.
Further, in the preparation method of the high multiplying power lithium ion battery graphite cathode material, cladding in step (3)
The weight ratio of agent and screenings is 5: 100.
Further, in the preparation method of the high multiplying power lithium ion battery graphite cathode material, ammonia in step (5)
Flow be 0.4~0.5m3/h。
Further, in the preparation method of the high multiplying power lithium ion battery graphite cathode material, ammonia in step (5)
Pressure be 0.4~0.6MPa.
Further, in the preparation method of the high multiplying power lithium ion battery graphite cathode material, graphite in step (6)
The sphericity of change product is adjusted to 80%~90%.
The utility model has the advantages that the present invention provides a kind of high multiplying power lithium ion battery graphite cathode materials, compared with prior art, lead to
It crosses and covering is set in graphite particle outer layer, play modified purpose；Further, by graphitization product further under ammonia flow
High-temperature process, ammonia thermal decomposition generate activated nitrogen atom, and constantly diffusion penetrates into graphite particle to realize to graphite particle
The purpose for carrying out N doping is more advantageous to the insertion of lithium ion, improves since the electronegativity of nitrogen-atoms is higher than carbon atom
The capacity and high rate performance of graphite cathode material.
Specific embodiment
The present invention provides a kind of preparation method of high multiplying power lithium ion battery graphite cathode material, to make mesh of the invention
, technical solution and effect it is clearer, clear, the present invention is described in more detail by the following examples.It should be appreciated that this
Place is described, and specific examples are only used to explain the present invention, is not intended to limit the present invention.
The present invention provides a kind of preparation method of high multiplying power lithium ion battery graphite cathode material, comprising the following steps:
(1) choosing partial size is the graphite particle less than 8mm as raw material, and the raw material is crushed；
(2) smashed raw material is obtained into screenings by vibrating screen, the sieve mesh number range of vibrating screen is 300~400
Mesh；
(3) step (2) resulting screenings being mixed with covering and obtains powder, the covering is pitch or resin,
The weight ratio of covering and screenings is (1: 100)~(8: 100)；
(4) the resulting powder of step (3) is subjected to graphitization processing and obtains graphitization product；
(5) the resulting graphitization product of step (4) are handled 3~8 hours under conditions of 400~600 DEG C, ammonia flow；
(6) by step (5), treated that graphitization product are sent to vibromill, passes through the spherical shape that vibromill adjusts graphitization product
Degree.
(1) choosing partial size is the graphite particle less than 8mm as raw material, and the raw material is crushed；
(2) smashed raw material is obtained into screenings by vibrating screen, the sieve mesh number range of vibrating screen is 300~400
Mesh；
(3) the resulting powder of step (2) is subjected to graphitization processing and obtains graphitization product；Graphitization is originally as conventional place
Reason, is not especially limited herein；
(4) the resulting graphitization product of step (3) are mixed with covering and obtains powder, the covering is pitch or tree
The weight ratio of rouge, covering and screenings is (1: 100)~(8: 100)；
(5) step (4) resulting powder is handled 3~8 hours under conditions of 400~600 DEG C, ammonia flow and obtains graphite
Second particle；
(6) by step (5), treated that graphite second particle is sent to vibromill, passes through the ball that vibromill adjusts graphitization product
Shape degree.
Preferably, graphite particle is petroleum coke particles or needle coke particles in step (1).
Preferably, the sieve mesh number of vibrating screen is 400 mesh in step (2).
Preferably, the weight ratio of covering and screenings is 5: 100 in step (4).
Preferably, the flow of ammonia is 0.4~0.5m in step (5)3/h。
Preferably, the pressure of ammonia is 0.4~0.6MPa in step (5).
Preferably, the sphericity of graphitization product is adjusted to 80%~90% in step (6).
In order to make it easy to understand, further illustrating by the following examples.
Embodiment 1
(1) choosing partial size is the graphite particle less than 8mm as raw material, and the raw material is crushed；
(2) smashed raw material is obtained into screenings by vibrating screen, the sieve mesh number range of vibrating screen is 300；
(3) the resulting powder of step (3) is subjected to graphitization processing and obtains graphitization product；
(4) the resulting graphitization product of step (3) are mixed with covering and obtains powder, the covering is pitch, cladding
The weight ratio of agent and screenings is 1: 100；
(5) step (4) resulting powder is handled 3 hours under conditions of 400 DEG C, ammonia flow, ammonia flow is
0.4m3/ h, ammonia pressure 0.4MPa；Obtain graphite second particle；
(6) the resulting graphite second particle of step (5) is sent to vibromill, sphericity adjusted is 80%；Obtain stone
Black negative electrode material.
Embodiment 2
(1) choosing partial size is the graphite particle less than 8mm as raw material, and the raw material is crushed；
(2) smashed raw material is obtained into screenings by vibrating screen, the sieve mesh number range of vibrating screen is 325 mesh；
(3) the resulting powder of step (3) is subjected to graphitization processing and obtains graphitization product；
(4) the resulting graphitization product of step (3) are mixed with covering and obtains powder, the covering is pitch, cladding
The weight ratio of agent and screenings is 5: 100；
(5) step (4) resulting powder is handled 6 hours under conditions of 480 DEG C, ammonia flow, ammonia flow is
0.45m3/ h, ammonia pressure 0.5MPa；Obtain graphite second particle；
(6) the resulting graphite second particle of step (5) is sent to vibromill, sphericity adjusted is 88%；Obtain stone
Black negative electrode material.
Embodiment 3
(1) choosing partial size is the graphite particle less than 8mm as raw material, and the raw material is crushed；
(2) smashed raw material is obtained into screenings by vibrating screen, the sieve mesh number range of vibrating screen is 400 mesh；
(3) the resulting powder of step (3) is subjected to graphitization processing and obtains graphitization product；
(4) the resulting graphitization product of step (3) are mixed with covering and obtains powder, the covering is pitch, cladding
The weight ratio of agent and screenings is 8: 100；
(5) step (4) resulting powder is handled 8 hours under conditions of 600 DEG C, ammonia flow, ammonia flow is
0.5m3/ h, ammonia pressure 0.6MPa；Obtain graphite second particle；
(6) the resulting graphite second particle of step (5) is sent to vibromill, sphericity adjusted is 90%；Obtain stone
Black negative electrode material.
Embodiment 4
(1) choosing partial size is the graphite particle less than 8mm as raw material, and the raw material is crushed；
(2) smashed raw material is obtained into screenings by vibrating screen, the sieve mesh number range of vibrating screen is 300 mesh；
(3) the resulting powder of step (3) is subjected to graphitization processing and obtains graphitization product；
(4) the resulting graphitization product of step (3) are mixed with covering and obtains powder, the covering is pitch, cladding
The weight ratio of agent and screenings is 4: 100；
(5) step (4) resulting powder is handled 8 hours under conditions of 400 DEG C, ammonia flow, ammonia flow is
0.4m3/ h, ammonia pressure 0.6MPa；Obtain graphite second particle；
(6) the resulting graphite second particle of step (5) is sent to vibromill, sphericity adjusted is 90%；Obtain stone
Black negative electrode material.
Embodiment 5
(1) choosing partial size is the graphite particle less than 8mm as raw material, and the raw material is crushed；
(2) smashed raw material is obtained into screenings by vibrating screen, the sieve mesh number range of vibrating screen is 400 mesh；
(3) the resulting powder of step (3) is subjected to graphitization processing and obtains graphitization product；
(4) the resulting graphitization product of step (3) are mixed with covering and obtains powder, the covering is pitch, cladding
The weight ratio of agent and screenings is 1: 100；
(5) step (4) resulting powder is handled 3 hours under conditions of 520 DEG C, ammonia flow, ammonia flow is
0.5m3/ h, ammonia pressure 0.4MPa；Obtain graphite second particle；
(6) the resulting graphite second particle of step (5) is sent to vibromill, sphericity adjusted is 80%；Obtain stone
Black negative electrode material.
By property such as the resulting graphite cathode material tap density of above-described embodiment 1~5, button battery capacity, 10C reversible capacities
It can be carried out test, as a result as follows:
By above-mentioned analysis it is found that high multiplying power lithium ion battery graphite cathode material provided by the invention passes through in graphite
Covering is arranged in grain outer layer, plays modified purpose；Further, by the further high-temperature process under ammonia flow of graphitization product,
Ammonia thermal decomposition generates activated nitrogen atom, and constantly diffusion penetrates into graphite particle and carries out N doping to graphite particle to realize
Purpose, due to nitrogen-atoms electronegativity be higher than carbon atom, be more advantageous to the insertion of lithium ion, improve graphite cathode material
The capacity and high rate performance of material.
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement all should belong to protection scope of the present invention.
Claims (7)
1. a kind of preparation method of high multiplying power lithium ion battery graphite cathode material, which comprises the following steps:
(1) choosing partial size is the graphite particle less than 8mm as raw material, and the raw material is crushed；
(2) smashed raw material is obtained into screenings by vibrating screen, the sieve mesh number range of vibrating screen is 300~400 mesh；
(3) the resulting powder of step (2) is subjected to graphitization processing and obtains graphitization product；
(4) the resulting graphitization product of step (3) are mixed with covering and obtains powder, the covering is pitch or resin, packet
The weight ratio for covering agent and screenings is (1: 100)~(8: 100)；
(5) step (4) resulting powder handles to obtain graphite within 3~8 hours secondary under conditions of 400~600 DEG C, ammonia flow
Particle；
(6) by step (5), treated that graphite second particle is sent to vibromill, passes through the spherical shape that vibromill adjusts graphitization product
Degree.
2. the preparation method of high multiplying power lithium ion battery graphite cathode material according to claim 1, which is characterized in that step
Suddenly graphite particle is petroleum coke particles or needle coke particles in (1).
3. the preparation method of high multiplying power lithium ion battery graphite cathode material according to claim 1, which is characterized in that step
Suddenly the sieve mesh number of vibrating screen is 400 mesh in (2).
4. the preparation method of high multiplying power lithium ion battery graphite cathode material according to claim 1, which is characterized in that step
Suddenly the weight ratio of covering and screenings is 5: 100 in (4).
5. the preparation method of high multiplying power lithium ion battery graphite cathode material according to claim 1, which is characterized in that step
Suddenly the flow of ammonia is 0.4~0.5m in (5)3/h。
6. the preparation method of high multiplying power lithium ion battery graphite cathode material according to claim 1, which is characterized in that step
Suddenly the pressure of ammonia is 0.4~0.6MPa in (5).
7. the preparation method of high multiplying power lithium ion battery graphite cathode material according to claim 1, which is characterized in that step
Suddenly the sphericity of graphitization product is adjusted to 80%~90% in (6).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794319A (en) * | 2020-12-07 | 2021-05-14 | 铜仁学院 | Preparation method of coking coal-based high-rate graphite negative electrode material |
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| CN107507979A (en) * | 2016-06-14 | 2017-12-22 | 上海杉杉科技有限公司 | A kind of preparation method of high jolt ramming artificial plumbago negative pole material |
| CN109449428A (en) * | 2018-12-05 | 2019-03-08 | 中南大学 | A kind of nitrogen-doped carbon cladding admixed graphite composite material and preparation method and the application in lithium ion battery |
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- 2019-06-13 CN CN201910508562.XA patent/CN110212186A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034975A (en) * | 2010-11-15 | 2011-04-27 | 中国科学院青岛生物能源与过程研究所 | Nitrogen-doped graphite carbon serving as anode material of lithium ion battery, and preparation method and application thereof |
| CN107507979A (en) * | 2016-06-14 | 2017-12-22 | 上海杉杉科技有限公司 | A kind of preparation method of high jolt ramming artificial plumbago negative pole material |
| CN109449428A (en) * | 2018-12-05 | 2019-03-08 | 中南大学 | A kind of nitrogen-doped carbon cladding admixed graphite composite material and preparation method and the application in lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112794319A (en) * | 2020-12-07 | 2021-05-14 | 铜仁学院 | Preparation method of coking coal-based high-rate graphite negative electrode material |
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Application publication date: 20190906 |