CN112331843A - Positive electrode material, positive electrode, preparation method of positive electrode and lithium secondary battery - Google Patents
Positive electrode material, positive electrode, preparation method of positive electrode and lithium secondary battery Download PDFInfo
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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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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- 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
- H01M2004/028—Positive electrodes
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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 belongs to the technical field of lithium secondary battery anode materials, and particularly relates to an anode material, an anode, a preparation method of the anode material and a lithium secondary battery. According to the cathode material disclosed by the invention, the titanium aluminum lithium phosphate and/or the doped titanium aluminum lithium phosphate are/is used as the additive, so that the heavy object impact resistance of the lithium secondary battery can be obviously improved, the ionic conductivity of the cathode material can be improved, the impedance and the temperature rise are reduced, and the cycle life of the lithium secondary battery is further prolonged.
Description
Technical Field
The invention belongs to the technical field of lithium secondary battery anode materials, and particularly relates to an anode material, an anode and a preparation method thereof, and a lithium secondary battery.
Background
Secondary batteries, particularly lithium secondary batteries, have now become a new generation of energy storage containers in today's society. Lithium secondary batteries have high electrochemical performance, are developed rapidly, and have increasingly wide application fields. However, the impact safety and the needle safety of the weight in the conventional lithium secondary battery are often difficult to secure. At present, the means for improving the safety of the lithium secondary battery is mainly to add a flame retardant additive into an electrolyte, but the flame retardant additive can affect the electrochemistry of the lithium secondary battery to different degrees, and the flame retardant additive is difficult to be applied to commercial batteries. Therefore, how to improve the safety of the lithium secondary battery is one of the problems to be solved in the current lithium secondary battery research.
Disclosure of Invention
The invention aims to provide a positive electrode material, a positive electrode, a preparation method of the positive electrode material and a lithium secondary battery, and aims to solve the technical problem of poor safety in the conventional lithium secondary battery.
In order to achieve the above object, according to one aspect of the present invention, there is provided a positive electrode material including a positive electrode active material, a binder, a conductive agent, and an organic solvent, and further including an additive, wherein the additive is titanium aluminum lithium phosphate and/or doped titanium aluminum lithium phosphate.
In the cathode material provided by the invention, the titanium aluminum lithium phosphate and/or the doped titanium aluminum lithium phosphate are/is used as the additive, so that the heavy object impact resistance of the lithium secondary battery can be obviously improved, the ionic conductivity of the cathode material can be improved, the impedance and the temperature rise are reduced, and the cycle life of the lithium secondary battery is prolonged.
As a preferable technical scheme of the cathode material of the present invention, the weight of the additive accounts for 2% to 5% of the total weight of the cathode material, based on 100% of the total weight of the cathode material.
As a preferable technical scheme of the cathode material, the doping element in the doped lithium aluminum titanium phosphate is at least one of magnesium, zirconium and boron.
As a preferable technical scheme of the cathode material, the mass ratio of the cathode active material, the additive, the binder, the conductive agent and the organic solvent is (90-96.5): 2-5): 1-5): 0.5-5): 100-120.
As a preferable technical solution of the positive electrode material of the present invention, the positive electrode active material is at least one selected from lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, lithium cobalt oxide, lithium nickel oxide, and lithium manganese oxide.
As a preferable embodiment of the positive electrode material of the present invention, the binder is at least one selected from polyvinylidene fluoride (PVDF), polyethylene oxide (PEO), polyacrylic acid (PAA), and polyvinylpyrrolidone (PVP).
As a preferable technical solution of the positive electrode material of the present invention, the conductive agent is at least one selected from acetylene black, ketjen black, KS-6, Super P, carbon nanotube, and graphene.
As a preferable embodiment of the cathode material of the present invention, the organic solvent is N-methylpyrrolidone (NMP).
In another aspect of the invention, a positive electrode is provided, which includes a positive electrode current collector and a positive electrode material layer laminated and combined on the surface of the positive electrode current collector, wherein the positive electrode material layer includes the positive electrode material provided by the invention.
The positive electrode material in the positive electrode provided by the invention takes the titanium aluminum lithium phosphate and/or the doped titanium aluminum lithium phosphate as additives, so that the heavy object impact resistance of the lithium secondary battery can be improved, and the lithium secondary battery has good conductivity.
In another aspect of the present invention, a method for preparing a positive electrode is provided, which includes the steps of:
providing a positive electrode material, wherein the positive electrode material is the positive electrode material;
and providing a positive current collector, coating the positive material on the surface of the positive current collector, and performing heat treatment to obtain the positive electrode.
The preparation method of the anode provided by the invention is simple and feasible, the preparation process is convenient to control, and the large-scale production is favorably realized.
As a preferred technical scheme of the preparation method of the anode, the heat treatment temperature is 100-200 ℃, and the heat treatment time is 10-120 min.
In a final aspect of the present invention, a lithium secondary battery is provided, which includes a positive electrode, a negative electrode, and a separator located between the positive electrode and the negative electrode, wherein the positive electrode is the positive electrode of the present invention, or the positive electrode prepared by the method of the present invention.
In the lithium secondary battery provided by the invention, the positive electrode comprises the titanium aluminum lithium phosphate and/or the doped titanium aluminum lithium phosphate additive, so that the lithium secondary battery has high weight impact resistance, conductivity and cycle performance and good application prospect.
In a preferred embodiment of the lithium secondary battery of the present invention, the separator has a tensile strength in the transverse and longitudinal directions of more than 1300kgf/cm2The transverse elongation is less than or equal to 50 percent, and the longitudinal elongation is more than or equal to 90 percent.
Drawings
Fig. 1 is a graph comparing the cycle performance of the cylindrical secondary battery obtained in example 1 of the present invention with that of the cylindrical lithium secondary battery obtained in comparative example 1.
Detailed Description
In order to make the objects, technical solutions and technical effects of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and the embodiments described below are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive step in connection with the embodiments of the present invention shall fall within the scope of protection of the present invention. Those whose specific conditions are not specified in the examples are carried out according to conventional conditions or conditions recommended by the manufacturer; the reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, the term "and/or" describing an association relationship of associated objects means that there may be three relationships, for example, a and/or B, may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the description of the present invention, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (a), b, or c", or "at least one (a), b, and c", may each represent: a. b, c, a-b (i.e. a and b), a-c, b-c, or a-b-c, wherein a, b, and c can be single or multiple respectively.
It should be understood that the weight of the related components mentioned in the embodiments of the present invention may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, it is within the scope of the disclosure that the content of the related components is scaled up or down according to the embodiments of the present invention. Specifically, the weight described in the embodiments of the present invention may be a unit of mass known in the chemical field such as μ g, mg, g, kg, etc.
In addition, unless the context clearly uses otherwise, an expression of a word in the singular is to be understood as including the plural of the word. The terms "comprises" or "comprising" are intended to specify the presence of stated features, quantities, steps, operations, elements, portions, or combinations thereof, but are not intended to preclude the presence or addition of one or more other features, quantities, steps, operations, elements, portions, or combinations thereof.
The embodiment of the invention provides a positive electrode material, which comprises a positive electrode active substance, a binder, a conductive agent and an organic solvent, and also comprises an additive, wherein the additive is titanium aluminum lithium phosphate and/or doped titanium aluminum lithium phosphate
In the cathode material provided by the embodiment of the invention, the titanium aluminum lithium phosphate and/or the doped titanium aluminum lithium phosphate are/is used as the additive, so that the heavy object impact resistance of the lithium secondary battery can be obviously improved, the ionic conductivity of the cathode material can be improved, the impedance and the temperature rise are reduced, and the cycle life of the lithium secondary battery is prolonged.
In some embodiments, the weight of the additive is 2% to 5% of the total weight of the positive electrode material, based on 100% of the total weight of the positive electrode material. Experiments show that when the content of the additive is in the range, the additive has a remarkable improvement effect on the heavy object impact resistance of the obtained lithium secondary battery, and is favorable for further improving the safety and stability of the lithium secondary battery. If the content of the additive is too small, the additive cannot play a role in promoting the heavy object impact resistance of the lithium secondary battery; if the content of the additive is too high, the additive occupies the proportion of the positive active material, which affects the energy density of the lithium secondary battery.
In some embodiments, the doping element in the doped lithium aluminum titanium phosphate is at least one of magnesium, zirconium, and boron. Experiments prove that the doped lithium titanium aluminum phosphate material and the lithium titanium aluminum phosphate have the effect of improving the weight impact resistance of the lithium secondary battery.
In some embodiments, the mass ratio of the positive active material, the additive, the binder, the conductive agent and the organic solvent in the positive material is controlled to be (90-96.5): (2-5): (1-5): (0.5-5): (100-). 120). The mass ratio of each substance is within the range, the obtained positive electrode material has higher energy density and conductivity, and the positive electrode material can form a positive electrode active layer with stable structure when being coated on a positive electrode current collector, and has the effects of improving the weight impact resistance and the cycle life of the lithium secondary battery. In some embodiments, the positive active material is selected from at least one of lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide; the binder is at least one selected from polyvinylidene fluoride, polyethylene oxide, polyacrylic acid and polyvinylpyrrolidone; the conductive agent is at least one of acetylene black, Ketjen black, KS-6, Super P, carbon nano tube and graphene; the organic solvent is N-methyl pyrrolidone. By using these positive electrode active material, binder, conductive agent, organic solvent and additive as the positive electrode material, the energy density and the conductivity of the positive electrode material can be synergistically promoted.
The preparation method of the cathode material provided by the embodiment of the invention can be a conventional preparation method in the field. For example, a positive electrode material is obtained by mixing a positive electrode active material, an additive, a conductive agent, a binder, and an organic solvent.
The embodiment of the invention also provides a positive electrode, which comprises a positive electrode current collector and a positive electrode material layer laminated and combined on the surface of the positive electrode current collector, wherein the positive electrode material layer comprises the positive electrode material provided by the embodiment of the invention.
The positive electrode material in the positive electrode provided by the embodiment of the invention takes the titanium aluminum lithium phosphate and/or the doped titanium aluminum lithium phosphate as the additive, so that the heavy object impact resistance of the lithium secondary battery can be improved, and the lithium secondary battery has good conductivity.
In the embodiment of the present invention, there is no particular limitation on the material selection, thickness, and shape of the positive electrode current collector, and the material, thickness, and shape suitable as the positive electrode current collector in the art are all suitable for the embodiment of the present invention.
The positive electrode provided by the embodiment of the invention can be prepared by the following preparation method.
Correspondingly, the embodiment of the invention also provides a preparation method of the anode, which comprises the following steps:
s1, providing a positive electrode material;
and S2, providing a positive electrode current collector, coating the positive electrode material on the surface of the positive electrode current collector, and performing heat treatment to obtain the positive electrode.
The preparation method of the anode provided by the embodiment of the invention is simple and easy to implement, the preparation process is convenient to control, and the large-scale production is favorably realized.
Specifically, in S1, the positive electrode material is the positive electrode material provided in the embodiments of the present invention, and includes a positive electrode active material, a binder, a conductive agent, an organic solvent, and an additive, where the additive is titanium aluminum lithium phosphate and/or doped titanium aluminum lithium phosphate. The contents of the positive electrode active material, the binder, the conductive agent, the organic solvent and the additive in the positive electrode material and the specific selection of the additive are as described above, and are not described herein again for brevity.
In S2, the selection of the material, the thickness, and the shape of the positive electrode current collector are not particularly limited, and any material, thickness, and shape suitable as a positive electrode current collector in the art is suitable for the embodiment of the present invention. In some embodiments, after the positive electrode material is coated on the surface of the positive electrode current collector, the heat treatment is carried out at the temperature of 100-200 ℃ for 10-120 min, so that the positive electrode material coated on the surface of the positive electrode current collector forms a positive electrode active layer and is tightly combined with the positive electrode current collector.
The embodiment of the invention also provides a lithium secondary battery, which comprises a positive electrode, a negative electrode and a diaphragm positioned between the positive electrode and the negative electrode, wherein the positive electrode is the positive electrode provided by the embodiment of the invention or the positive electrode prepared by the preparation method of the positive electrode provided by the embodiment of the invention.
In the lithium secondary battery provided by the embodiment of the invention, the positive electrode comprises the lithium titanium aluminum phosphate and/or the doped lithium titanium aluminum phosphate additive, so that the lithium secondary battery has high weight impact resistance, conductivity and cycle performance, and good application prospect.
The positive electrode provided by the embodiment of the invention is applicable to various types of lithium secondary batteries in principle. The cylindrical lithium secondary battery has higher energy density, smaller volume and large explosion hazard, so that the international standard has higher requirement on the weight impact test of the cylindrical lithium secondary battery, and a plurality of cylindrical lithium secondary batteries are difficult to pass, so that the cathode provided by the embodiment of the invention is preferably applied to the cylindrical lithium secondary battery.
In some embodiments, the following conditions are required for a separator in a lithium secondary battery: transverse and longitudinal tensile strength > 1300kgf/cm2The transverse elongation is less than or equal to 50 percent, and the longitudinal elongation is more than or equal to 90 percent. By selecting the diaphragm of the type, the heat dissipation rate of the lithium secondary battery after being impacted by a heavy object can be improved, and the safety of the lithium secondary battery is further improved.
In order to make the above implementation details and operations of the present invention clearly understood by those skilled in the art and to make the advanced performances of the cathode material, the cathode and the preparation method thereof, and the lithium secondary battery of the embodiments of the present invention obviously manifest, the above technical solutions are exemplified by a plurality of embodiments below.
Example 1
The embodiment provides a preparation method of a positive electrode material and a cylindrical lithium secondary battery, which comprises the following steps:
(11) mixing nickel cobalt lithium manganate, titanium aluminum lithium phosphate, a binder, a conductive agent and NMP according to a ratio of 96.5:2: 1: mixing the materials in a mass ratio of 0.5:100 to obtain a slurry-like positive electrode material;
(12) coating the obtained anode material on the surface of an anode current collector, and baking for 20min by using a 120 ℃ baking oven to obtain an anode;
(13) the obtained positive electrode, negative electrode and separator (tensile strength in the transverse and longitudinal directions > 1300 kgf/cm)2Transverse elongation not more than 50% and longitudinal elongation not less than 90%, available from Sumitomo chemical) by winding, ending the membrane, and attaching a pair of stop tapesAnd (3) fastening the battery cell, then putting the battery cell into a steel shell, baking, injecting liquid, sealing and forming to obtain the cylindrical lithium secondary battery.
Example 2
This example is essentially the same as example 1 except that the lithium aluminum titanium phosphate content is 3%.
Example 3
This example is essentially the same as example 1 except that the lithium aluminum titanium phosphate content is 4%.
Example 4
This example is essentially the same as example 1 except that the lithium aluminum titanium phosphate content is 5%.
Example 5
This example is substantially the same as example 1 except that lithium titanium aluminum phosphate is boron element-doped lithium titanium aluminum phosphate.
Example 6
This example is substantially the same as example 1 except that the positive electrode active material is nickel cobalt lithium aluminate.
Comparative example 1
This comparative example is substantially the same as example 1 except that lithium aluminum titanium phosphate was not added and the mass ratio of the positive electrode active material, the binder, the conductive agent, and NMP was 96.7:1.8:1.5: 100.
Comparative example 2
This comparative example is substantially the same as example 1 except that the mass ratio of the positive electrode active material, lithium aluminum titanium phosphate, the binder, the conductive agent, and NMP was 97.5:1:1:0.5: 100.
Comparative example 3
This comparative example is substantially the same as example 1 except that the mass ratio of the positive electrode active material, lithium aluminum titanium phosphate, the binder, the conductive agent, and NMP was 92.5:6:1:0.5: 100.
Comparative example 4
This comparative example is substantially the same as example 1 except that the tensile strength in the transverse and longitudinal directions of the separator was > 1300kgf/cm2Transverse elongation>50 percent and the longitudinal elongation is more than or equal to 90 percent.
Experimental example 1
The cylindrical lithium secondary batteries obtained in examples 1 to 6 and comparative examples 1 to 4 were subjected to a 100% SOC full charge weight impact performance test, and the test results are shown in table 1.
TABLE 1 results of full-load impact property test of cylindrical lithium secondary batteries obtained in examples 1 to 6 and comparative examples 1 to 4
It can be seen from table 1 that the addition of lithium aluminum titanium phosphate between 2% and 5% can make the weight percent of pass 100%, but when the addition exceeds 5%, the weight percent of pass is still guaranteed to be 100%, but the final capacity is less than 3.0Ah because the addition of the positive electrode active material is affected, and the capacity requirement of the high energy density battery design cannot be met.
Experimental example 2
Electrochemical properties of the cylindrical lithium secondary batteries obtained in example 1 and comparative example 1 were measured, and the results are shown in fig. 1.
As can be seen from fig. 1, by adding titanium aluminum lithium phosphate as an additive to the positive electrode material, it is helpful to improve the ionic conductivity of the obtained positive electrode, thereby reducing the impedance and temperature rise and improving the cycle life of the obtained lithium secondary battery.
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 cathode material comprises a cathode active substance, a binder, a conductive agent and an organic solvent, and is characterized by further comprising an additive, wherein the additive is titanium aluminum lithium phosphate and/or doped titanium aluminum lithium phosphate.
2. The positive electrode material according to claim 1, wherein the additive is present in an amount of 2 to 5 wt% based on 100 wt% of the total weight of the positive electrode material.
3. The positive electrode material according to claim 1, wherein the doping element in the doped lithium titanium aluminum phosphate is at least one of magnesium, zirconium and boron.
4. The positive electrode material as claimed in claim 1, wherein the mass ratio of the positive electrode active material, the additive, the binder, the conductive agent and the organic solvent is (90-96.5): (2-5): (1-5): (0.5-5): (100-) > 120).
5. The positive electrode material according to any one of claims 1 to 3, wherein the positive electrode active material is selected from at least one of lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, lithium cobalt oxide, lithium nickel oxide, and lithium manganese oxide; and/or
The binder is at least one selected from polyvinylidene fluoride, polyethylene oxide, polyacrylic acid and polyvinylpyrrolidone; and/or
The conductive agent is selected from at least one of acetylene black, Ketjen black, KS-6, Super P, carbon nano tube and graphene; and/or
The organic solvent is N-methyl pyrrolidone.
6. A positive electrode comprising a positive electrode current collector and a positive electrode material layer laminated and bonded to a surface of the positive electrode current collector, wherein the positive electrode material layer comprises the positive electrode material according to any one of claims 1 to 5.
7. A preparation method of a positive electrode is characterized by comprising the following steps:
providing a positive electrode material, wherein the positive electrode material is the positive electrode material in any one of claims 1 to 5;
and providing a positive current collector, coating the positive material on the surface of the positive current collector, and performing heat treatment to obtain the positive electrode.
8. The method for producing the positive electrode according to claim 7, wherein the heat treatment temperature is 100 ℃ to 200 ℃ and the heat treatment time is 10min to 120 min.
9. A lithium secondary battery comprising a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, wherein the positive electrode is the positive electrode according to claim 6 or the positive electrode prepared by the method of any one of claims 7 to 8.
10. The lithium secondary battery according to claim 9, wherein the transverse and longitudinal tensile strength of the separator is > 1300kgf/cm2The transverse elongation is less than or equal to 50 percent, and the longitudinal elongation is more than or equal to 90 percent.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113707880A (en) * | 2021-08-23 | 2021-11-26 | 湖州南木纳米科技有限公司 | Positive pole piece containing solid electrolyte and preparation method and application thereof |
| CN114649528A (en) * | 2021-03-30 | 2022-06-21 | 深圳市德方纳米科技股份有限公司 | Electrode additive, preparation method thereof and positive plate |
| CN116111041A (en) * | 2023-04-07 | 2023-05-12 | 宁德新能源科技有限公司 | Positive electrode plate, secondary battery and electronic device |
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| CN1930706A (en) * | 2004-08-17 | 2007-03-14 | 株式会社Lg化学 | Lithium secondary batteries with enhanced safety and performance |
| CN109768243A (en) * | 2018-12-27 | 2019-05-17 | 上海力信能源科技有限责任公司 | A kind of lithium ion battery anode glue size and preparation method thereof |
| CN110785876A (en) * | 2017-07-10 | 2020-02-11 | 株式会社Lg化学 | Positive electrode for lithium secondary battery, method for preparing same, and lithium secondary battery comprising same |
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2020
- 2020-10-16 CN CN202011110482.8A patent/CN112331843A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1930706A (en) * | 2004-08-17 | 2007-03-14 | 株式会社Lg化学 | Lithium secondary batteries with enhanced safety and performance |
| CN110785876A (en) * | 2017-07-10 | 2020-02-11 | 株式会社Lg化学 | Positive electrode for lithium secondary battery, method for preparing same, and lithium secondary battery comprising same |
| CN109768243A (en) * | 2018-12-27 | 2019-05-17 | 上海力信能源科技有限责任公司 | A kind of lithium ion battery anode glue size and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114649528A (en) * | 2021-03-30 | 2022-06-21 | 深圳市德方纳米科技股份有限公司 | Electrode additive, preparation method thereof and positive plate |
| CN113707880A (en) * | 2021-08-23 | 2021-11-26 | 湖州南木纳米科技有限公司 | Positive pole piece containing solid electrolyte and preparation method and application thereof |
| CN116111041A (en) * | 2023-04-07 | 2023-05-12 | 宁德新能源科技有限公司 | Positive electrode plate, secondary battery and electronic device |
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Application publication date: 20210205 |