CN105118988A - High-voltage spinel-structured cathode material for lithium ion battery as well as preparation method - Google Patents
High-voltage spinel-structured cathode material for lithium ion battery as well as preparation method Download PDFInfo
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- CN105118988A CN105118988A CN201510662253.XA CN201510662253A CN105118988A CN 105118988 A CN105118988 A CN 105118988A CN 201510662253 A CN201510662253 A CN 201510662253A CN 105118988 A CN105118988 A CN 105118988A
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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
- H01M4/362—Composites
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- 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
- 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
Abstract
The invention relates to a high-voltage spinel-structured cathode material for a lithium ion battery as well as a preparation method. The cathode material comprises a LiNi0.5Mn1.5O4 matrix and a lithium orthosilicate coating layer arranged on the matrix surface in a coating manner. The preparation method comprises the following steps: a Ni source and a Mn source are mixed uniformly and then mixed with a carbonate solution, pH is regulated to 6-10, the materials react at 30-80 DEG C for 1-10 h, a precursor is obtained and subjected to heat preservation at 500-700 DEG C for 1-5 h, and an intermediate product is prepared; the intermediate product is mixed with a first Li source, the mixture is heated to 700-900 DEG C at the rate of 1-10 DEG C/min and subjected to heat preservation for 8-20 h, and the matrix is prepared; a second Li source and a Si source are dissolved in a water and alcohol mixture with a sol-gel method and aged for 1-72 h, a lithium orthosilicate solution is prepared and mixed with the matrix, the mixture is evaporated, a product is heated to 400-700 DEG C in air atmosphere and subjected to heat preservation for 1-5 h, and the cathode material is prepared. The high-voltage spinel-structured cathode material has good cycle performance at high temperature.
Description
Technical field
The present invention relates to lithium ion battery high-voltage spinel anode material and preparation method, belong to field of lithium ion battery.
Background technology
Anode material for lithium-ion batteries spinel nickel LiMn2O4, because the plurality of advantages such as operating voltage is high, environmental friendliness, energy density are high, good rate capability receive increasing concern.But for high-voltage spinel anode material, under shortcoming is high temperature, cycle performance is poor.
Summary of the invention
The object of this invention is to provide a kind of preparation method of lithium ion battery high-voltage spinel structure positive electrode, to solve under spinel nickel LiMn2O4 high temperature the problems such as cycle performance difference.
Concrete technical scheme of the present invention is:
A preparation method for lithium ion battery high-voltage spinel structure positive electrode, it comprises the following steps:
First nickel source and manganese source are fully mixed in water according to certain ratio, mix with carbonate solution more afterwards, adjustment pH value of solution to 6 ~ 10 (such as 6,7,8,9 or 10 etc.), react 1 ~ 10 hour at 30 ~ 80 DEG C, obtain presoma nickelous carbonate manganese, by described presoma 500 ~ 700 DEG C of insulations 1 ~ 5 hour, obtained intermediate product;
Described intermediate product is mixed with lithium source one, is heated to 700 ~ 900 DEG C with 1 ~ 10 DEG C/min, be incubated 8 ~ 20 hours, obtained matrix spinel nickel LiMn2O4;
By the method for collosol and gel, lithium source two and silicon source to be dissolved in the mixture of water and alcohols ageing 1 ~ 72 hour, obtained positive lithium metasilicate solution, wherein, the volume ratio of the water and alcohols that form described mixture is 1:2 ~ 1:5, is mixed by described positive lithium metasilicate solution, evaporate to dryness at 40 DEG C ~ 80 DEG C with described matrix, then in air atmosphere, be heated to 400 ~ 700 DEG C with 1 ~ 10 DEG C/min, be incubated 1 ~ 5 hour, be i.e. obtained product.
The preferred nickel nitrate in described nickel source, nickelous sulfate, nickel acetate or nickel chloride.
The preferred manganese nitrate in described manganese source, manganese sulfate, manganese acetate or manganese chloride.
The preferred sodium carbonate of described carbonate, sodium acid carbonate or ammonium carbonate.
Described lithium source one is lithium hydroxide, lithium carbonate or lithium nitrate preferably.
Described lithium source two is lithium hydroxide, lithium carbonate or lithium nitrate preferably, and described silicon source is tetraethoxysilane or silicon dioxide.
Described alcohols particular methanol, ethanol or ethylene glycol.
Present invention also offers a kind of lithium ion battery high-voltage spinel structure positive electrode, this positive electrode comprises matrix and is coated on the coating layer of matrix surface, and the chemical formula of described matrix is LiNi
0.5mn
1.5o
4, described coating layer is positive lithium metasilicate, and this positive electrode can be obtained by preparation method described in above-mentioned any one.Wherein, the preferred range of the mass percentage of described positive lithium metasilicate is 1 ~ 5%, such as, can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or 5%.
The present invention has following beneficial effect:
The method that first the present invention is combined by co-precipitation and high temperature sintering synthesizes high-voltage spinel nickel ion doped, i.e. matrix, then with method coated positive lithium metasilicate on this matrix that collosol and gel and high temperature sintering combine, synthesize the spinel nickel LiMn2O4 that Surface coating has positive lithium metasilicate, obtain the high-voltage spinel structure lithium ion battery positive electrode of Stability Analysis of Structures and electrochemical performance.Positive electrode particle prepared by this technology has porous spherical pattern, and this porous spherical pattern is made up of nanoscale crystal grain, and nanocrystal shortens the distance of lithium ion diffusion, is conducive to the raising of high rate performance.What simultaneously spherical morphology contributed to again battery anode slice can coating.Utilize the positive lithium metasilicate coating modification with high-lithium ion conductivity; silicate can absorb the Microamounts of Hydrogen fluoric acid cleared up and exist in electrolyte; protect the erosion of positivity pole material from electrolyte, the high-lithium ion conductivity of lithium metasilicate reduces again the interface impedance of positive electrode surface and electrolyte simultaneously.Special pattern effectively improves high rate capability and the high temperature circulation stability of high-voltage spinel manganate cathode material for lithium in conjunction with special modification technology.
Accompanying drawing explanation
Fig. 1 is the X ray diffracting spectrum of the product that embodiment 1 obtains;
Fig. 2 is the scanning electron microscope (SEM) photograph of the product that embodiment 1 obtains;
Fig. 3 is the cycle performance curve of the product that embodiment 1 obtains;
Fig. 4 is the X ray diffracting spectrum of the product that embodiment 2 obtains;
Fig. 5 is the scanning electron microscope (SEM) photograph of the product that embodiment 2 obtains;
Fig. 6 is the cycle performance curve of the product that embodiment 2 obtains;
Fig. 7 is the X ray diffracting spectrum of the product that embodiment 3 obtains;
Fig. 8 is the scanning electron microscope (SEM) photograph of the product that embodiment 3 obtains;
Fig. 9 is the cycle performance curve of the product that embodiment 3 obtains.
Embodiment
Embodiment 1:
In molar ratio Mn: Ni=3: 1 take nickelous sulfate and manganese chloride mixing water-soluble, mix with sodium bicarbonate solution again, solution PH is adjusted to 9, heating water bath to 50 DEG C, electromagnetic agitation reacts 4 hours, filtration obtains presoma nickelous carbonate manganese, afterwards this presoma is incubated 3 hours at 600 DEG C, obtains intermediate product.Subsequently, intermediate product mixes with lithium hydroxide by Mn: Li=3: 2 in molar ratio, in Muffle furnace, be warming up to 800 DEG C with 5 DEG C/min, is incubated and within 12 hours, obtains matrix spinel nickel LiMn2O4.By the elemental mole ratios of positive lithium metasilicate, take lithium hydroxide and tetraethoxysilane joins in the mixed solution (volume ratio of water and ethanol is 1: 2) of water and ethanol, ageing forms positive lithium metasilicate colloidal sol for 24 hours, this colloidal sol is mixed with obtained matrix phase, evaporate to dryness at 60 DEG C, then be placed in Muffle furnace, in air atmosphere, be warming up to 500 DEG C with 5 DEG C/min, be incubated and obtain positive electrode one in 3 hours.
Obtained positive electrode one comprises matrix and is coated on the coating layer of matrix surface, and the chemical formula of matrix is LiNi
0.5mn
1.5o
4, coating layer is positive lithium metasilicate, and the mass percentage of positive lithium metasilicate is 1%.
Fig. 1 shows the X ray diffracting spectrum of this positive electrode one, can find out, this positive electrode one is spinel nickel LiMn2O4.
Fig. 2 shows the scanning electron microscope (SEM) photograph of this positive electrode one.Can find out, the granule-morphology of this positive electrode one is the spherical of porous.
Fig. 3 shows this positive electrode one at 5C, 55 DEG C, the cycle performance curve of 3.5-5V.Can find out, this positive electrode one at high temperature has good cycle performance.
Embodiment 2:
In molar ratio Mn: Ni=3: 1 take nickel chloride and manganese sulfate mixing water-soluble, mix with sal volatile again, solution PH is adjusted to 7, heating water bath to 60 DEG C, electromagnetic agitation reacts 5 hours, filtration obtains presoma nickelous carbonate manganese, afterwards presoma is incubated 4 hours at 700 DEG C, obtains intermediate product.Subsequently, intermediate product mixes with lithium hydroxide by Mn: Li=3: 2 in molar ratio, in Muffle furnace, be warming up to 900 DEG C with 3 DEG C/min, is incubated and within 8 hours, obtains matrix spinel nickel LiMn2O4.By the elemental mole ratios of positive lithium metasilicate, take lithium hydroxide and tetraethoxysilane joins in the mixed solution (volume ratio of water and ethanol is 1: 3) of water and ethanol, ageing forms positive lithium metasilicate colloidal sol for 72 hours, this colloidal sol is mixed with obtained matrix phase, evaporate to dryness at 70 DEG C, then be placed in Muffle furnace, in air atmosphere, be warming up to 600 DEG C with 3 DEG C/min, be incubated and obtain positive electrode two in 4 hours.
Obtained positive electrode two comprises matrix and is coated on the coating layer of matrix surface, and the chemical formula of matrix is LiNi
0.5mn
1.5o
4, coating layer is positive lithium metasilicate, and the mass percentage of positive lithium metasilicate is 4%.
Fig. 3 to 6 correspondence shows the X ray diffracting spectrum of positive electrode two, scanning electron microscope (SEM) photograph and positive electrode two at 5C, 55 DEG C, the cycle performance curve of 3.5-5V.Can find out, this positive electrode two is spinel nickel LiMn2O4, and its granule-morphology is the spherical of porous, and at high temperature has good cycle performance.
Embodiment 3:
In molar ratio Mn: Ni=3: 1 take nickel acetate and manganese acetate mixing water-soluble, mix with sodium carbonate liquor again, solution PH is adjusted to 10, heating water bath to 40 DEG C, electromagnetic agitation reacts 6 hours, filtration obtains presoma nickelous carbonate manganese, afterwards presoma is incubated 5 hours at 500 DEG C, obtains intermediate product.Subsequently, intermediate product mixes with lithium hydroxide by Mn: Li=3: 2 in molar ratio, in Muffle furnace, be warming up to 700 DEG C with 8 DEG C/min, is incubated and within 10 hours, obtains matrix spinel nickel LiMn2O4.By the elemental mole ratios of positive lithium metasilicate, take lithium hydroxide and tetraethoxysilane joins in the mixed solution (volume ratio of water and ethanol is 1: 4) of water and ethanol, ageing forms positive lithium metasilicate colloidal sol for 48 hours, this colloidal sol is mixed with obtained matrix phase, evaporate to dryness at 80 DEG C, then be placed in Muffle furnace, in air atmosphere, be warming up to 400 DEG C with 8 DEG C/min, be incubated and obtain positive electrode three in 5 hours.
Obtained positive electrode three comprises matrix and is coated on the coating layer of matrix surface, and the chemical formula of matrix is LiNi
0.5mn
1.5o
4, coating layer is positive lithium metasilicate, and the mass percentage of positive lithium metasilicate is 2%.
Fig. 7 to 9 correspondence shows the X ray diffracting spectrum of positive electrode three, scanning electron microscope (SEM) photograph and positive electrode three at 5C, 55 DEG C, the cycle performance curve of 3.5-5V.Can find out, this positive electrode three is spinel nickel LiMn2O4, and its granule-morphology is the spherical of porous, at high temperature has good cycle performance.
Claims (10)
1. a lithium ion battery preparation method for high-voltage spinel structure positive electrode, is characterized in that, this preparation method comprises the following steps:
First nickel source and manganese source are fully mixed in water according to certain ratio, mix with carbonate solution more afterwards, react 1 ~ 10 hour at pH is 6 ~ 10 and 30 ~ 80 DEG C, obtain presoma nickelous carbonate manganese, by described presoma 500 ~ 700 DEG C of insulations 1 ~ 5 hour, obtained intermediate product;
Described intermediate product is mixed with lithium source one, is heated to 700 ~ 900 DEG C with 1 ~ 10 DEG C/min, be incubated 8 ~ 20 hours, obtained matrix spinel nickel LiMn2O4;
By the method for collosol and gel, lithium source two and silicon source to be dissolved in the mixture of water and alcohols ageing 1 ~ 72 hour, obtained positive lithium metasilicate solution, wherein, the volume ratio of the water and alcohols that form described mixture is 1:2 ~ 1:5, is mixed by described positive lithium metasilicate solution, evaporate to dryness at 40 DEG C ~ 80 DEG C with described matrix, then in air atmosphere, be heated to 400 ~ 700 DEG C with 1 ~ 10 DEG C/min, be incubated 1 ~ 5 hour, be i.e. obtained product.
2. the preparation method of lithium ion battery high-voltage spinel structure positive electrode according to claim 1, is characterized in that: described nickel source is nickel nitrate, nickelous sulfate, nickel acetate or nickel chloride.
3. the preparation method of lithium ion battery high-voltage spinel structure positive electrode according to claim 1, is characterized in that: described manganese source is manganese nitrate, manganese sulfate, manganese acetate or manganese chloride.
4. the preparation method of lithium ion battery high-voltage spinel structure positive electrode according to claim 1, is characterized in that: described carbonate is sodium carbonate, sodium acid carbonate or ammonium carbonate.
5. the preparation method of lithium ion battery high-voltage spinel structure positive electrode according to claim 1, is characterized in that: described lithium source one is lithium hydroxide, lithium carbonate or lithium nitrate.
6. the preparation method of lithium ion battery high-voltage spinel structure positive electrode according to claim 1, is characterized in that: described lithium source two is lithium hydroxide, lithium carbonate or lithium nitrate, and described silicon source is tetraethoxysilane or silicon dioxide.
7. the preparation method of lithium ion battery high-voltage spinel structure positive electrode according to claim 1, is characterized in that: described alcohols is methyl alcohol, ethanol or ethylene glycol.
8. a lithium ion battery high-voltage spinel structure positive electrode, it is characterized in that: described positive electrode is preparation method according to any one of claim 1 to 7 obtain, this positive electrode comprises matrix and is coated on the coating layer of matrix surface, and the chemical formula of described matrix is LiNi
0.5mn
1.5o
4, described coating layer is positive lithium metasilicate.
9. lithium ion battery high-voltage spinel structure positive electrode according to claim 8, is characterized in that: the mass percentage of described positive lithium metasilicate is 1 ~ 5%.
10. lithium ion battery high-voltage spinel structure positive electrode according to claim 8, is characterized in that: the granule-morphology of described positive electrode is the spherical of porous.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514391A (en) * | 2016-01-22 | 2016-04-20 | 山东大学 | Lithium-metasilicate-modified lithium titanate cathode material and preparing method and application thereof |
| CN106887583A (en) * | 2015-12-15 | 2017-06-23 | 中国科学院化学研究所 | A kind of positive electrode and its preparation method and application |
| CN107681138A (en) * | 2017-09-21 | 2018-02-09 | 深圳市贝特瑞纳米科技有限公司 | A kind of lithium base high temperature inhales carbon material modified anode material, preparation method and the usage |
| CN108123105A (en) * | 2016-11-26 | 2018-06-05 | 中国科学院大连化学物理研究所 | A kind of manganese-base oxide positive electrode of electrode layer modification and preparation and application |
| CN110808363A (en) * | 2019-11-12 | 2020-02-18 | 中国科学院过程工程研究所 | Lithium silicate coated lithium-rich manganese-based positive electrode material and preparation method and application thereof |
| CN110880591A (en) * | 2019-11-29 | 2020-03-13 | 中伟新材料股份有限公司 | SiO2Coated lithium ion battery anode precursor material and preparation method thereof |
| WO2022198749A1 (en) * | 2021-03-25 | 2022-09-29 | 宁德时代新能源科技股份有限公司 | Lithium manganate positive electrode active material and positive pole piece containing same, secondary battery, battery module, battery pack and powered device |
| CN115360343A (en) * | 2022-10-04 | 2022-11-18 | 兰州理工大学 | Preparation method of modified lithium-rich nickel lithium manganate system cathode material |
| EP4120394A4 (en) * | 2021-06-01 | 2023-04-12 | Contemporary Amperex Technology Co., Limited | Lithium manganese oxide positive electrode active material, positive electrode plate containing same, secondary battery, battery module, battery pack and electrical device |
| WO2023057280A1 (en) * | 2021-10-04 | 2023-04-13 | Basf Se | Process for the manufacture of a coated cathode active material, and coated cathode active material |
| CN116322983A (en) * | 2020-10-15 | 2023-06-23 | 国立大学法人京都大学 | Anode for alkaline water electrolysis and method for producing same |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106887583A (en) * | 2015-12-15 | 2017-06-23 | 中国科学院化学研究所 | A kind of positive electrode and its preparation method and application |
| CN105514391A (en) * | 2016-01-22 | 2016-04-20 | 山东大学 | Lithium-metasilicate-modified lithium titanate cathode material and preparing method and application thereof |
| CN108123105A (en) * | 2016-11-26 | 2018-06-05 | 中国科学院大连化学物理研究所 | A kind of manganese-base oxide positive electrode of electrode layer modification and preparation and application |
| CN107681138A (en) * | 2017-09-21 | 2018-02-09 | 深圳市贝特瑞纳米科技有限公司 | A kind of lithium base high temperature inhales carbon material modified anode material, preparation method and the usage |
| CN110808363A (en) * | 2019-11-12 | 2020-02-18 | 中国科学院过程工程研究所 | Lithium silicate coated lithium-rich manganese-based positive electrode material and preparation method and application thereof |
| CN110880591A (en) * | 2019-11-29 | 2020-03-13 | 中伟新材料股份有限公司 | SiO2Coated lithium ion battery anode precursor material and preparation method thereof |
| CN116322983A (en) * | 2020-10-15 | 2023-06-23 | 国立大学法人京都大学 | Anode for alkaline water electrolysis and method for producing same |
| CN116322983B (en) * | 2020-10-15 | 2024-03-15 | 国立大学法人京都大学 | Anode for alkaline water electrolysis and method for producing same |
| CN115133020A (en) * | 2021-03-25 | 2022-09-30 | 宁德时代新能源科技股份有限公司 | Lithium manganate positive electrode active material, positive electrode plate comprising same, secondary battery, battery module, battery pack and electric device |
| JP2023523492A (en) * | 2021-03-25 | 2023-06-06 | 寧徳時代新能源科技股▲分▼有限公司 | Lithium manganate positive electrode active material and positive electrode sheet containing the same, secondary battery, battery module, battery pack and electric device |
| WO2022198749A1 (en) * | 2021-03-25 | 2022-09-29 | 宁德时代新能源科技股份有限公司 | Lithium manganate positive electrode active material and positive pole piece containing same, secondary battery, battery module, battery pack and powered device |
| CN115133020B (en) * | 2021-03-25 | 2023-11-07 | 宁德时代新能源科技股份有限公司 | Lithium manganate positive electrode active material, positive electrode plate containing same, secondary battery, battery module, battery pack and power utilization device |
| JP7415019B2 (en) | 2021-03-25 | 2024-01-16 | 寧徳時代新能源科技股▲分▼有限公司 | Lithium manganate positive electrode active materials, positive electrode sheets containing the same, secondary batteries, battery modules, battery packs, and electrical devices |
| EP4120394A4 (en) * | 2021-06-01 | 2023-04-12 | Contemporary Amperex Technology Co., Limited | Lithium manganese oxide positive electrode active material, positive electrode plate containing same, secondary battery, battery module, battery pack and electrical device |
| US11929499B2 (en) | 2021-06-01 | 2024-03-12 | Contemporary Amperex Technology Co., Limited | Lithium manganate positive electrode active material as well as positive electrode sheet, secondary battery, battery module, battery pack and powered device comprising the same |
| WO2023057280A1 (en) * | 2021-10-04 | 2023-04-13 | Basf Se | Process for the manufacture of a coated cathode active material, and coated cathode active material |
| CN115360343A (en) * | 2022-10-04 | 2022-11-18 | 兰州理工大学 | Preparation method of modified lithium-rich nickel lithium manganate system cathode material |
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