CN114843505A - Method for delaying sagger corrosion in sintering process of nickel cobalt lithium manganate positive electrode material - Google Patents
Method for delaying sagger corrosion in sintering process of nickel cobalt lithium manganate positive electrode material Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000005245 sintering Methods 0.000 title claims abstract description 32
- 238000005260 corrosion Methods 0.000 title claims abstract description 21
- 230000007797 corrosion Effects 0.000 title claims abstract description 20
- HFCVPDYCRZVZDF-UHFFFAOYSA-N [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O Chemical compound [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O HFCVPDYCRZVZDF-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000007774 positive electrode material Substances 0.000 title claims abstract description 16
- 239000011812 mixed powder Substances 0.000 claims abstract description 104
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims abstract description 74
- 239000002243 precursor Substances 0.000 claims abstract description 19
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 230000001678 irradiating effect Effects 0.000 claims abstract description 15
- 239000010405 anode material Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000011049 filling Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000010304 firing Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 9
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 9
- 239000010406 cathode material Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 238000009770 conventional sintering Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- 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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Abstract
The invention discloses a method for delaying sagger corrosion in a sintering process of nickel cobalt lithium manganate serving as a cathode material, and belongs to the field of lithium ion battery manufacturing. The method comprises the following steps: the preparation method comprises the steps of mixing a nickel-cobalt-manganese precursor and lithium hydroxide sufficiently to obtain mixed powder, irradiating the mixed powder by using an infrared heat source and microwaves in sequence, mixing the mixed powder after the irradiation is finished and cooling the mixed powder, finally filling the mixed powder into a sagger, and sintering the sagger according to the sintering process of the anode material. According to the method, the effect of delaying the sagger corrosion can be achieved simply by pretreating the mixed powder of the nickel-cobalt-manganese precursor and the lithium hydroxide through the cooperation of infrared irradiation and microwave irradiation, the service life of the sagger is obviously prolonged, the anticorrosion effect is obvious, the performance of the sintered positive electrode material is not influenced, the method is simple, and the method has important economic and environmental significance and wide application prospect.
Description
Technical Field
The invention relates to the field of lithium ion battery manufacturing, in particular to a method for preventing saggars from being corroded in a lithium ion battery anode material nickel cobalt lithium manganate sintering process so as to prolong the service life of the saggars.
Background
The lithium ion battery as a green energy storage secondary battery has the advantages of high working voltage, large energy density, long cycle life, low self-discharge rate, no memory effect, no environmental pollution and the like, so that the lithium ion battery is rapidly developed in the technology, production and market in the last decade, has formed a large new energy industry and is more and more valued in various aspects. The key part of the lithium ion battery is a positive electrode material, the current lithium ion battery positive electrode material mainly comprises lithium cobaltate, lithium manganate, a ternary lithium nickel cobalt manganese oxide material and lithium iron phosphate, wherein the lithium ion battery taking the lithium nickel cobalt manganese oxide as the positive electrode material has the characteristics of light weight, large capacity, high specific energy, high working voltage, stable discharge, suitability for large-current discharge, good cycle performance, long service life and the like, has the advantage of irreplaceability on a high-capacity battery, is the current lithium ion battery positive electrode material with the largest yield, and is mainly applied to mobile phones, MP3, MP4, Bluetooth, notebook computers and the like.
With the rapid development of the lithium battery industry, the technology of the lithium battery is continuously improved, the performance is continuously improved, the cost is continuously reduced, the requirements on the impurity content and the gram volume of a lithium battery material are higher and higher, and in the process of producing the nickel cobalt lithium manganate at present, lithium hydroxide in a molten state has the bonding and corrosion effects on a sagger, so that the service life of the sagger is obviously reduced and shortened.
Disclosure of Invention
The invention aims to: aiming at the problem that the saggars are seriously corroded in the sintering process of the ternary cathode material, the method for delaying the corrosion of the saggars in the sintering process of the nickel cobalt lithium manganate cathode material is provided, the corrosion prevention effect is obvious, the performance of the sintered cathode material is not influenced, the method is simple, and the method has important economic and environmental significance and wide application prospect.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the method for delaying the sagger corrosion in the sintering process of the nickel cobalt lithium manganate positive electrode material comprises the following steps:
the preparation method comprises the steps of mixing a nickel-cobalt-manganese precursor and lithium hydroxide sufficiently to obtain mixed powder, irradiating the mixed powder by using an infrared heat source and microwaves in sequence, mixing the mixed powder after the irradiation is finished and cooling the mixed powder, finally filling the mixed powder into a sagger, and sintering the sagger according to the sintering process of the anode material.
In the scheme, the irradiation time of the infrared heat source is 1-10 min.
In the above scheme, the microwave irradiation time is 5-20 min.
In the scheme, the maximum heating time of the microwave is determined according to the calculation of 2.5 x d/P in order to ensure that the powder contacted with the bearing object does not react with the bearing object, the maximum heating time is related to the thickness of the mixed powder on the bearing object and the microwave power irradiated in unit area, wherein d is the thickness (cm) of the mixed powder on the bearing object, and P is the power (W/cm) irradiated by the microwave of the powder in unit area 2 )。
Preferably, the thickness d of the mixed powder is 5-20cm, and the power P of the powder receiving microwave irradiation per unit area is 1-4W/cm 2 。
In the scheme, the method specifically comprises the following steps:
(1) uniformly mixing a nickel-cobalt-manganese precursor with lithium hydroxide to obtain mixed powder, and spreading the mixed powder on the surface of a bearing object;
(2) putting the bearing object and the mixed powder into a heating furnace provided with an infrared heat source and a microwave source;
(3) opening an infrared source above the sample to irradiate the surface of the mixed powder, and closing the infrared source after the irradiation is finished;
(4) turning on a microwave source, irradiating the mixed powder for a certain time by using microwaves, and turning off the microwave source;
(5) and then the treated mixed powder is put into a sagger to carry out a normal firing process.
The invention relates to a method for directly heating lithium hydroxide and nickel cobalt lithium manganate precursor mixed powder by combining infrared radiation and microwave radiation so as to reduce the content of lithium hydroxide in the mixed powder and delay the corrosion of a sagger. The method makes full use of different heating characteristics of infrared and microwave, utilizes infrared pre-heating mixed powder with small penetrating power but no selective heating power to raise the surface temperature, thereby improving the microwave absorbing capacity of the powder, and then under the heating action of the microwave with strong penetrating power, part of lithium hydroxide and nickel cobalt manganese precursor in the mixed powder are subjected to rapid reaction. Along with the extension of the microwave irradiation time, the high-temperature region moves downwards, and the reaction between the lithium hydroxide and the nickel-cobalt-manganese precursor also extends downwards, so that the content of the lithium hydroxide with strong corrosion in the mixed powder is reduced. Through the control of the reaction time, the mixed powder close to the bearing object does not absorb microwave due to the fact that the mixed powder is far away from the surface receiving irradiation, the temperature is low, the lithium hydroxide and the nickel-cobalt-manganese precursor do not react, the bearing object cannot be corroded, and the purity of the mixed powder is guaranteed. After the pretreatment is finished, the mixed powder is taken out and uniformly mixed, and is filled into a saggar to be sintered according to the normal sintering process of the anode material, and because the lithium hydroxide content in the raw material is low, the corrosion to the saggar for sintering is obviously reduced, so that the service life of the saggar is effectively prolonged.
The invention has the beneficial effects that:
1. the invention provides a method for delaying sagger corrosion in a sintering process of a nickel cobalt lithium manganate positive electrode material, wherein before the positive electrode material is sintered, infrared rays and microwaves are used for pretreating a mixed powder of a nickel cobalt manganese precursor and lithium hydroxide, the surface of the mixed powder is heated by infrared irradiation to improve the microwave absorption capacity of the mixed powder, and then microwave irradiation is utilized to facilitate quick reaction of part of lithium hydroxide and the nickel cobalt manganese precursor in the mixed powder, so that the lithium hydroxide and the nickel cobalt manganese precursor have a synergistic effect with each other, the content of lithium hydroxide having a corrosion effect on the sagger in the subsequent sintering process is reduced, and the time of sagger crack occurrence caused by corrosion is delayed; meanwhile, the mixed powder pretreated by the process is sintered according to the existing mature sintering process of the anode material, and the performance of the anode material is kept unchanged.
2. The method simply performs pretreatment on the mixed powder of the nickel-cobalt-manganese precursor and the lithium hydroxide by cooperation of infrared and microwave irradiation, so that the effect of delaying the corrosion of the sagger can be achieved, the use frequency of the sagger can be increased from 12 times to more than 20 times, the maximum time can be 31 times, the service life of the sagger is obviously prolonged, the anti-corrosion effect is obvious, the performance of the sintered anode material is not influenced, the method is simple, and the method has important economic and environmental significance and wide application prospect.
Drawings
FIG. 1 is a comparison of the X-ray diffraction patterns of the mixed powder pretreated by the combination of infrared and microwave in example 1 of the present invention and the mixed powder not pretreated by the combination of infrared and microwave.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a method for delaying sagger corrosion in a nickel cobalt lithium manganate positive electrode material sintering process, which comprises the following steps:
the method comprises the steps of mixing a nickel-cobalt-manganese precursor and lithium hydroxide fully, then uniformly spreading the mixture on the surface of a bearing object, placing the bearing object into a heating furnace containing infrared and microwave radiation, wherein the mixed powder is positioned in a microwave heating zone, and an infrared light source is arranged above the mixed powder. Firstly, using an infrared heat source for irradiation to raise the surface temperature of the mixed powder, then closing the infrared heat source, using microwaves for irradiating the mixed powder, closing the microwave source after a period of time, cooling the mixed powder, uniformly mixing, then loading into a sagger, and finishing the sintering according to the sintering process of the anode material.
The following are specific examples.
Example 1
A method for delaying sagger corrosion in a nickel cobalt lithium manganate positive electrode material sintering process specifically comprises the following steps:
(1) uniformly mixing a nickel-cobalt-manganese precursor with lithium hydroxide to obtain mixed powder, and flatly paving the mixed powder on the surface of a bearing object, wherein the thickness of the mixed powder is about 9 cm;
(2) placing the carrier and the mixed powder into a heating furnace equipped with infrared heat source and microwave source, wherein the microwave and infrared irradiation area is about 600cm 2 ；
(3) Starting an infrared source to irradiate the surface of the mixed powder, and closing the infrared source after irradiating for 3 minutes;
(4) turning on a microwave source with microwave power of 1000W, irradiating the mixed powder for 10min by using microwaves with frequency of 2.45GHZ, and turning off the microwave source;
(5) and cooling the mixed powder, uniformly mixing the cooled mixed powder again, putting the mixed powder into a sagger, and normally sintering the mixed powder according to the conventional sintering process of the nickel cobalt lithium manganate cathode material.
FIG. 1 shows that the relative intensity of the LiOH diffraction peak is significantly reduced in comparison with the X-ray diffraction of the mixed powder pretreated with the infrared and microwave combination in example 1 and the mixed powder not pretreated with the infrared and microwave combination.
When the mixed powder subjected to the infrared and microwave combined pretreatment was fired in the same sagger, cracks began to appear in the sagger 30 times. The sagger of the same batch is used for firing the mixed powder without infrared and microwave combined pretreatment only for twelve times.
The electrochemical performance of the electrode material obtained by carrying out combined pretreatment by infrared and microwave and then sintering according to the normal anode material sintering process is as follows: the discharge specific capacity under 0.2C is 208.9mAh/g, the discharge specific capacity after 50 times of circulation under 1C is 170.3mAh/g, the capacity retention rate is 95%, and after 100 times of circulation, 138.7mAh/g is still obtained, and the capacity retention rate is 77.3%. The electrochemical properties of the electrode material without combined pretreatment of infrared and microwave are as follows: the discharge specific capacity under 0.2C is 201.3mAh/g, the discharge specific capacity after 50 times of circulation under 1C is 161.8mAh/g, the capacity retention rate is 94%, after 100 times of circulation, 129.5mAh/g is added, and the capacity retention rate is 75.2%. Overall, both performances are almost the same.
Example 2
A method for delaying sagger corrosion in a nickel cobalt lithium manganate positive electrode material sintering process specifically comprises the following steps:
(1) uniformly mixing a nickel-cobalt-manganese precursor with lithium hydroxide to obtain mixed powder, and flatly paving the mixed powder on the surface of a bearing object, wherein the thickness of the mixed powder is 5 cm;
(2) placing the carrier and the mixed powder into a heating furnace equipped with infrared heat source and microwave source, wherein the microwave and infrared irradiation area is about 600cm 2 ；
(3) Starting an infrared source to irradiate the surface of the mixed powder, and closing the infrared source after irradiating for 10 min;
(4) turning on a microwave source with microwave power of 1500W, irradiating the mixed powder with microwave with frequency of 2.45GHZ for 5min, and turning off the microwave source;
(5) and cooling the mixed powder, uniformly mixing the cooled mixed powder again, filling the mixed powder into a sagger, and normally sintering the mixed powder according to the conventional sintering process of the nickel cobalt lithium manganate cathode material.
When the mixed powder subjected to the infrared and microwave combined pretreatment was fired in the same sagger, cracks began to appear in the sagger for 26 times. The sagger of the same batch is used for firing the mixed powder without infrared and microwave combined pretreatment only for twelve times.
Example 3
A method for delaying sagger corrosion in a nickel cobalt lithium manganate positive electrode material sintering process specifically comprises the following steps:
(1) uniformly mixing a nickel-cobalt-manganese precursor with lithium hydroxide to obtain mixed powder, and flatly paving the mixed powder on the surface of a bearing object, wherein the thickness of the mixed powder is 10 cm;
(2) placing the carrier and the mixed powder into a heating furnace equipped with infrared heat source and microwave source, wherein the microwave and infrared irradiation area is about 600cm 2 ；
(3) Starting an infrared source to irradiate the surface of the mixed powder, and closing the infrared source after irradiating for 1 min;
(4) turning on a microwave source with microwave power of 750W, irradiating the mixed powder with microwaves with frequency of 2.45GHZ for 20min, and turning off the microwave source;
(5) and cooling the mixed powder, uniformly mixing the cooled mixed powder again, filling the mixed powder into a sagger, and normally sintering the mixed powder according to the conventional sintering process of the nickel cobalt lithium manganate cathode material.
When the mixed powder subjected to the infrared and microwave combined pretreatment was fired in the same sagger, cracks began to appear in 31 saggers. The sagger of the same batch is used for firing the mixed powder without infrared and microwave combined pretreatment only for twelve times.
Example 4
A method for delaying sagger corrosion in a nickel cobalt lithium manganate positive electrode material sintering process specifically comprises the following steps:
(1) uniformly mixing a nickel-cobalt-manganese precursor with lithium hydroxide to obtain mixed powder, and flatly paving the mixed powder on the surface of a bearing object, wherein the thickness of the mixed powder is 15 cm;
(2) placing the carrier and the mixed powder into a heating furnace equipped with infrared heat source and microwave source, wherein the microwave and infrared irradiation area is about 600cm 2 ；
(3) Starting an infrared source to irradiate the surface of the mixed powder, and closing the infrared source after irradiating for 3 min;
(4) turning on a microwave source with microwave power of 2000W, irradiating the mixed powder for 10min by using microwaves with frequency of 2.45GHZ, and turning off the microwave source;
(5) and cooling the mixed powder, uniformly mixing the cooled mixed powder again, filling the mixed powder into a sagger, and normally sintering the mixed powder according to the conventional sintering process of the nickel cobalt lithium manganate cathode material.
When the mixed powder subjected to the infrared and microwave combined pretreatment was fired in the same sagger, cracks began to appear using 27 times of saggers. The sagger of the same batch is used for firing the mixed powder without infrared and microwave combined pretreatment only for twelve times.
Claims (6)
1. A method for delaying sagger corrosion in a nickel cobalt lithium manganate positive electrode material sintering process is characterized by comprising the following steps:
the preparation method comprises the steps of mixing a nickel-cobalt-manganese precursor and lithium hydroxide sufficiently to obtain mixed powder, irradiating the mixed powder by using an infrared heat source and microwaves in sequence, mixing the mixed powder after the irradiation is finished and cooling the mixed powder, finally filling the mixed powder into a sagger, and sintering the sagger according to the sintering process of the anode material.
2. The method of claim 1, wherein the irradiation time is 1-10min using an infrared heat source.
3. The method according to claim 1, wherein the time for irradiating with microwaves is 5 to 20 min.
4. The method according to claim 1, wherein the maximum heating time (min) of the microwave is determined by calculation at 2.5 x d/P, where d is the thickness (cm) of the mixed powder on the support, and P is the power (W/cm) of the microwave irradiation applied to the powder per unit area 2 )。
5. The method of claim 4, wherein d is 5-20 cm; p is 1-4W/cm 2 。
6. The method according to claim 1, characterized in that it comprises in particular the steps of:
1) uniformly mixing a nickel-cobalt-manganese precursor with lithium hydroxide to obtain mixed powder, and spreading the mixed powder on the surface of a bearing object;
2) putting the bearing object and the mixed powder into a heating furnace provided with an infrared heat source and a microwave source;
3) opening an infrared source above the sample to irradiate the surface of the mixed powder, and closing the infrared source after the irradiation is finished;
4) turning on a microwave source, irradiating the mixed powder for a certain time by using microwaves, and turning off the microwave source;
5) and then the treated mixed powder is put into a sagger to carry out a normal firing process.
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| CN102674273A (en) * | 2012-03-23 | 2012-09-19 | 湖南阳东微波科技有限公司 | Device for continuously producing lithium iron phosphate by microwave heating method |
| CN102901347A (en) * | 2012-11-12 | 2013-01-30 | 湖南山联新材科技有限公司 | Multipurpose microwave high-temperature pushed slab kiln |
| CN103474622A (en) * | 2013-08-30 | 2013-12-25 | 海特电子集团有限公司 | Microwave solidification preparation technology of lithium ion anode-cathode material |
| CN107925085A (en) * | 2015-08-10 | 2018-04-17 | 株式会社可乐丽 | Nonaqueous electrolyte battery is with adhesive composition and uses its nonaqueous electrolyte battery paste compound, nonaqueous electrolyte battery anode and nonaqueous electrolyte battery |
| CN109415207A (en) * | 2016-06-29 | 2019-03-01 | Dic株式会社 | The manufacturing device of metal oxide and the manufacturing method of aforementioned metal oxides |
| CN207716877U (en) * | 2018-01-08 | 2018-08-10 | 朱性宇 | Electrode material of lithium battery preparation saggar |
| CN108649216A (en) * | 2018-04-25 | 2018-10-12 | 三明厦钨新能源材料有限公司 | A kind of preparation method and saggar of nickel-cobalt lithium manganate cathode material |
| CN109888269A (en) * | 2018-12-29 | 2019-06-14 | 广东邦普循环科技有限公司 | A kind of pretreated method of ternary material mixing |
| CN111003733A (en) * | 2019-12-20 | 2020-04-14 | 山东友邦科思茂新材料有限公司 | Method for preparing high-nickel ternary lithium battery anode material through microwave intelligent frequency conversion second-order sintering |
| CN113178565A (en) * | 2021-03-29 | 2021-07-27 | 广东邦普循环科技有限公司 | Mixing process for preparing high-nickel anode material and application thereof |
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