CN115159592A - High-magnification high-safety ternary material - Google Patents
High-magnification high-safety ternary material Download PDFInfo
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- CN115159592A CN115159592A CN202210985168.7A CN202210985168A CN115159592A CN 115159592 A CN115159592 A CN 115159592A CN 202210985168 A CN202210985168 A CN 202210985168A CN 115159592 A CN115159592 A CN 115159592A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Nickelates
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- C—CHEMISTRY; METALLURGY
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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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 discloses a high-magnification high-safety ternary material, which comprises Ni (NO 3) 2, co (NO 3) 2 and Mn (NO 3) 2, wherein the molar ratio of the Ni (NO 3) 2, the Co (NO 3) 2 and the Mn (NO 3) 2 is 2. The content of manganese in the ternary material is increased, the safety performance of the ternary material is improved, and the battery core produced by the ternary material can pass a needling test (the strictest standard in the current battery core safety test).
Description
Technical Field
The invention relates to the technical field of ternary materials, in particular to a high-magnification high-safety ternary material.
Background
The ternary materials mainly used in the prior industry are LiNi0.5Mn0.3Co0.2O2 and LiNi0.6Mn0.2Co0.2O2; the ternary particle size used in the industry at present is micron-sized, and the D50 is between 6 and 20 um.
The battery cell has poor safety performance due to high nickel and cobalt contents; the rate capability is poor due to the large particle size.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a high-magnification high-safety ternary material.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-magnification high-safety ternary material comprises Ni (NO 3) 2, co (NO 3) 2 and Mn (NO 3) 2, wherein the molar ratio of the Ni (NO 3) 2 to the Co (NO 3) 2 to the Mn (NO 3) 2 is (2).
As a further technical scheme of the invention, the modified high-manganese ternary material is coated by carbon, wherein the weight of the carbon coating layer accounts for about 1% of the weight of the modified ternary material.
As a further technical scheme of the invention, the particle size D50 of the modified high-manganese ternary is 3-5 um, and the modified high-manganese ternary structure is a layered structure.
As a further technical scheme of the invention, when the modified high-manganese ternary material is prepared, the method comprises the following steps:
s1: ni (NO 3) 2, co (NO 3) 2 and Mn (NO 3) 2 are mixed according to the mol ratio of Ni: co: the Mn = 2;
s2: preparing 15.0mol/l lithium carbonate solution, preparing 10mol/l ammonia water solution, respectively inputting the lithium nickel cobalt manganese oxide solution, the lithium carbonate solution and the ammonia water solution into a reactor by using a metering pump for reaction, controlling the temperature to be 50 ℃, the PH to be 12 and the stirring speed to be 300rpm in an argon environment;
s3: after the continuous reaction is carried out for 48 hours, transferring the materials in the reactor into another container, adding alkali to adjust the pH value to 13, stirring for 4 hours, carrying out solid-liquid separation, washing with deionized water to obtain a solid product (the conductivity of the washing water is less than 30 u/cm), and drying to obtain a high-manganese ternary precursor A;
s4: and (2) adding the high-manganese ternary precursor A and starch into the solution according to the mass ratio of 130.
The invention has the beneficial effects that:
1. the high-magnification high-safety ternary material has the advantages that the manganese content is increased, the safety performance of the material is improved, and the battery core produced by the material can pass a needling test (the strictest standard in the current battery core safety standard test).
2. The ternary material has good material multiplying power performance, high initial discharge voltage and high discharge platform.
3. The ternary material has high multiplying power and high safety, and the price of the material is relatively low.
Drawings
FIG. 1 is a charge-discharge curve diagram of a high-rate high-safety ternary material according to the present invention;
FIG. 2 is a test chart of electrochemical properties of a high-rate high-safety ternary material according to the invention;
fig. 3 is a cycle test graph of a high-rate high-safety ternary material according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, a high-rate and high-safety ternary material comprises Ni (NO 3) 2, co (NO 3) 2 and Mn (NO 3) 2, wherein the molar ratio of the Ni (NO 3) 2, co (NO 3) 2 and Mn (NO 3) 2 is 2.
As a further technical scheme of the invention, the modified high-manganese ternary material is coated by carbon, wherein the weight of the carbon coating layer accounts for about 1 percent of the weight of the modified ternary material.
As a further technical scheme of the invention, the particle size D50 of the modified high-manganese ternary is 3-5 um, and the modified high-manganese ternary structure is a layered structure.
As a further technical scheme of the invention, when the modified high-manganese ternary material is prepared, the method comprises the following steps:
s1: mixing Ni (NO 3) 2, co (NO 3) 2 and Mn (NO 3) 2 according to a molar ratio of Ni: co: the Mn = 2;
s2: preparing 15.0mol/l lithium carbonate solution and 10mol/l ammonia water solution, respectively inputting the lithium nickel cobalt manganese oxide solution and the lithium carbonate solution into a reactor by using a metering pump for reaction, controlling the temperature to be 50 ℃, the PH to be 12 and the stirring speed to be 300rpm in an argon environment;
s3: after the continuous reaction is carried out for 48 hours, transferring the materials in the reactor into another container, adding alkali to adjust the pH value to 13, stirring for 4 hours, carrying out solid-liquid separation, washing with deionized water to obtain a solid product (the conductivity of the washing water is less than 30 u/cm), and drying to obtain a high-manganese ternary precursor A;
s4: and (3) adding the high-manganese ternary precursor A and starch into the solution according to the mass ratio of 130:1, stirring for 3h, evaporating the solvent to dryness, putting the evaporated product into a tubular furnace, and calcining at 500 ℃ for 1h in the presence of nitrogen gas to obtain the coated high-manganese ternary.
The working principle is as follows: the content of manganese in the ternary material is increased, the safety performance of the material is improved, the battery cell produced by the material can pass a needling test (the strictest standard in the current safety standard of the battery cell), the multiplying power performance of the material is good, the initial discharge voltage and the discharge platform are high, and the material price is relatively low.
Having shown and described the basic principles and essential features of the invention and its advantages, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof, and it is therefore intended that the embodiments be considered as illustrative and not restrictive in all respects, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, any reference signs in the claims being therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A high-power high-safety ternary material contains Ni (NO) 3 ) 2 、Co(NO 3 ) 2 And Mn (NO) 3 ) 2 Characterized in that said Ni (NO) 3 ) 2 、Co(NO 3 ) 2 And Mn (NO) 3 ) 2 1, the molar ratio of the Ni (NO 3 ) 2 、Co(NO 3 ) 2 And Mn (NO) 3 ) 2 Mixing to obtain the modified high-manganese ternary material.
2. The ternary material with high magnification and high safety as claimed in claim 1, wherein the modified ternary material with high manganese content is coated with carbon, wherein the weight of the carbon coating layer is about 1% of the weight of the modified ternary material.
3. The ternary material with high magnification and safety according to claim 2, wherein the particle size D50 of the modified ternary high manganese is 3-5 um, and the structure of the modified ternary high manganese is a layered structure.
4. The ternary material with high magnification and high safety as claimed in claim 3, is characterized by comprising the following steps in preparation of the modified ternary material with high manganese content:
s1: mixing Ni (NO) 3 ) 2 、Co(NO 3 ) 2 And Mn (NO) 3 ) 2 According to the molar ratio of Ni: co: the Mn = 2;
s2: preparing 15.0mol/l lithium carbonate solution, preparing 10mol/l ammonia water solution, respectively inputting the lithium nickel cobalt manganese oxide solution, the lithium carbonate solution and the ammonia water solution into a reactor by using a metering pump for reaction, controlling the temperature to be 50 ℃, the PH to be 12 and the stirring speed to be 300rpm in an argon environment;
s3: after the continuous reaction is carried out for 48 hours, transferring the materials in the reactor into another container, adding alkali to adjust the pH value to 13, stirring for 4 hours, carrying out solid-liquid separation, washing with deionized water to obtain a solid product (the conductivity of the washing water is less than 30 u/cm), and drying to obtain a high-manganese ternary precursor A;
s4: and (3) adding the high-manganese ternary precursor A and starch into the solution according to the mass ratio of 130:1, stirring for 3h, evaporating the solvent to dryness, putting the evaporated product into a tubular furnace, and calcining at 500 ℃ for 1h in the presence of nitrogen gas to obtain the coated high-manganese ternary.
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| CN111106337A (en) * | 2019-12-31 | 2020-05-05 | 北京机科国创轻量化科学研究院有限公司 | Carbon nanotube modified lithium-rich manganese-based positive electrode material and preparation method thereof |
| CN112002878A (en) * | 2019-05-27 | 2020-11-27 | 湖北万润新能源科技发展有限公司 | Preparation method of ternary gradient material with manganese-rich surface layer |
| CN113346081A (en) * | 2021-05-27 | 2021-09-03 | 南京市永信合智能科技有限公司 | Method for preparing carbon-coated ternary cathode nano material by alkyne oxidation |
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- 2022-08-17 CN CN202210985168.7A patent/CN115159592A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102956881A (en) * | 2011-08-25 | 2013-03-06 | 深圳市钦雨新能源科技有限公司 | High-manganese solid solution as lithium ion battery anode material and preparation method thereof |
| CN102832387A (en) * | 2012-09-11 | 2012-12-19 | 清华大学深圳研究生院 | Layer-structured ternary material with rich lithium and high manganese as well as preparation method and application thereof |
| CN103855372A (en) * | 2012-11-29 | 2014-06-11 | 北京有色金属研究总院 | High-manganese composite cathode material and preparation method thereof |
| CN103332753A (en) * | 2013-06-06 | 2013-10-02 | 南通瑞翔新材料有限公司 | Preparation method of high-tap spherical high-manganese ternary anode material precursor |
| CN105720261A (en) * | 2014-12-04 | 2016-06-29 | 北京有色金属研究总院 | Preparation method of carbon-coated high-tap density composite positive electrode material |
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| CN111106337A (en) * | 2019-12-31 | 2020-05-05 | 北京机科国创轻量化科学研究院有限公司 | Carbon nanotube modified lithium-rich manganese-based positive electrode material and preparation method thereof |
| CN113346081A (en) * | 2021-05-27 | 2021-09-03 | 南京市永信合智能科技有限公司 | Method for preparing carbon-coated ternary cathode nano material by alkyne oxidation |
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