CN117594870A - Alumina modified functional electrolyte and button cell thereof - Google Patents
Alumina modified functional electrolyte and button cell thereof Download PDFInfo
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- CN117594870A CN117594870A CN202311564773.8A CN202311564773A CN117594870A CN 117594870 A CN117594870 A CN 117594870A CN 202311564773 A CN202311564773 A CN 202311564773A CN 117594870 A CN117594870 A CN 117594870A
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- alumina
- button cell
- modified functional
- functional electrolyte
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 68
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 229910013870 LiPF 6 Inorganic materials 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims description 25
- 239000011888 foil Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 22
- 239000002904 solvent Substances 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000002033 PVDF binder Substances 0.000 claims description 14
- 239000006230 acetylene black Substances 0.000 claims description 14
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 14
- 229910018060 Ni-Co-Mn Inorganic materials 0.000 claims description 12
- 229910018209 Ni—Co—Mn Inorganic materials 0.000 claims description 12
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 9
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- -1 iron ion Chemical class 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 2
- 239000006258 conductive agent Substances 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 14
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 9
- 229910001416 lithium ion Inorganic materials 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- 235000012431 wafers Nutrition 0.000 description 6
- 238000003760 magnetic stirring Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000000231 atomic layer deposition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
Classifications
-
- 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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
- H01M10/0563—Liquid materials, e.g. for Li-SOCl2 cells
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/002—Inorganic electrolyte
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses an alumina modified functional electrolyte and a button cell thereof, and aims to provide an electrolyte which can form a layer of film on the surface of a cathode so as to inhibit the generation of microcracks of cathode particles and improve the stability of an interface between the cathode and the electrolyte, and a cell with good cycle performance; the technical scheme is as follows: the alumina modified functional electrolyte is prepared by adding alumina into a solution containing LiPF 6 Stirring for 10-20h at normal temperature to obtain functional electrolyte; and the alumina modified functional electrolyte is used as electrolyte to prepare a button cell; belongs to the technical field of batteries.
Description
Technical Field
The invention belongs to the technical field of electrolyte, and particularly relates to an alumina modified functional electrolyte and a button cell thereof.
Background
With shortage of fossil fuel and increase of environmental pollution, it is urgent to seek safe, pollution-free and efficient energy. Lithium Ion Batteries (LIB) are used as novel energy storage devices, and become ideal energy sources for electric automobiles and electronic equipment due to the advantages of low cost, long service life, high energy density and the like. At present, the development trend of the lithium ion battery is mainly to improve the energy density, increase the use safety and reduce the cost, and the positive electrode material has a direct influence on the performance of the lithium ion battery and becomes a key factor for restricting the performance of the lithium ion battery.
In recent years, ternary cathode materials are widely used, and are beneficial to the characteristics of high specific capacity and low cost, but the ternary materials still have great defects, and serious microcracks and the like are generated in the process of dissolution, charge and discharge of transition metal ions. Al (Al) 2 O 3 Has the characteristics of wide sources, low cost and capability of obviously improving electrochemical performance, is a common cathode surface coating material, but the traditional Al 2 O 3 The surface of the cathode is coated by a coating means, and the process is complex.
Disclosure of Invention
Compared with the prior art, the alumina modified functional electrolyte provided by the invention can enable the surface of the cathode to form a layer of film, thereby inhibiting the generation of micro cracks of cathode particles and improving the stability of the interface between the cathode and the electrolyte.
The second technical scheme of the invention is to provide a button cell, which has good cycle performance.
The third technical scheme of the invention is to provide a preparation method of the button cell, which is simple and easy to operate.
For this purpose, the first technical solution provided by the present invention is as follows:
an alumina modified functional electrolyte is prepared through adding alumina to LiPF 6 Stirring for 10-20h at normal temperature to obtain the functional electrolyte.
The addition amount of the aluminum oxide is 0.25-1wt% of the functional electrolyte.
Preferably, the above alumina modified functional electrolyte, the mixed solution is a mixture of ethylene carbonate, dimethyl carbonate and ethylmethyl carbonate.
Preferably, the molar ratio of the ethylene carbonate to the dimethyl carbonate to the ethylmethyl carbonate is 1:1:1.
Preferably, the alumina modified functional electrolyte is gamma nano-scale alumina, and the iron ion content is 150-450ppm.
The second technical scheme provided by the invention is a button cell, wherein the functional electrolyte modified by alumina in the first technical scheme is used as electrolyte.
The third technical scheme provided by the invention is the preparation method of the button cell, which sequentially comprises the following steps:
1) Adding an Ni-Co-Mn ternary material, conductive acetylene black and PVDF into an N-methyl-2-pyrrolidone solvent, stirring the mixture into uniform slurry by a mixer, coating the slurry on a current collector aluminum foil, drying the slurry in vacuum after the solvent is dried, and uniformly cutting the slurry into electrodes;
2) In a glove box filled with high-purity argon, the button cell is assembled by taking the electrode prepared in the step 1) as a positive electrode, lithium metal foil as a negative electrode, alumina modified functional electrolyte as electrolyte and Celgard membrane as a diaphragm.
Further, in the preparation method of the button cell, the mass ratio of the ternary material to the conductive agent acetylene black to the binder PVDF is 8:1:1.
further, in the preparation method of the button cell, in the step 1), the vacuum drying is carried out in a vacuum oven at 60 ℃ for 10-15h.
Compared with the prior art, the technical scheme provided by the invention has the following technical advantages:
1. according to the alumina modified functional electrolyte provided by the invention, alumina in the functional electrolyte can react with part of HF, so that corrosion of HF on the surface of a cathode is prevented, side reaction at an interface can be inhibited, and the stability of the interface between the cathode and the electrolyte is stabilized, thereby improving electrochemical performance.
2. The alumina modified functional electrolyte provided by the invention forms a layer of film on the cathode surface, thereby inhibiting the generation of micro cracks of cathode particles, improving the stability of the interface between the cathode and the electrolyte, having good electrochemical performance,
3. the electrolyte provided by the invention effectively solves the defects of complexity and high equipment cost of an atomic layer deposition technology and difficulty in industrialization in the prior art, and has the advantages of simple preparation process, convenience in operation and prospect of industrialization.
4. The invention provides excellent cycle performance.
Drawings
FIG. 1 is a graph showing the results of an electrochemical discharge cycle test of example 1 of the present invention.
FIG. 2 is a graph showing the results of the electrochemical discharge cycle test of example 2 of the present invention.
FIG. 3 is a graph showing the results of the electrochemical discharge cycle test of example 3 of the present invention.
FIG. 4 is a graph of electrochemical discharge cycling test results of example 4 of the present invention.
Detailed Description
The following describes the invention in more detail. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The experimental methods in the following examples, unless otherwise specified, are conventional, and the experimental materials used in the following examples, unless otherwise specified, are commercially available.
Example 1
In the functional electrolyte provided in this example, 0.0075g of commercial gamma nano-scale alumina was dissolved in 3g of the original electrolyte, and a clear solution was obtained after magnetic stirring at 25 ℃ for 12 hours, which was the functional electrolyte.
The content of iron ions in the gamma nano-scale alumina is 170ppm.
The original electrolyte consists of 1.52g of LiPF 6 0.88g of ethylene carbonate, 0.90g of dimethyl carbonate and 1.04g of ethyl methyl carbonate.
A CR2032 type button cell is prepared by preparing Ni-Co-Mn ternary material, conductive acetylene black and PVDF according to a mass ratio of 8/1/1, adding a proper amount of N-methyl-2-pyrrolidone solvent (the addition of the solvent enables the slurry of the Ni-Co-Mn ternary material, the conductive acetylene black and the PVDF in a thick state to meet the requirements after being dissolved), stirring the mixture into uniform slurry, coating the uniform slurry on a current collector aluminum foil, drying the uniform slurry in a vacuum oven at 60 ℃ for 12 hours after the solvent is dried, and then uniformly cutting the uniform slurry into a wafer electrode with the diameter of 13 mm. In a glove box filled with high-purity argon, the prepared functional electrolyte is electrolyte with the cut electric wafer electrode as a positive electrode and lithium metal foil as a negative electrode, and the Celgard 2400 membrane is a diaphragm to assemble the CR2032 button battery. And testing the performance of the prepared lithium ion battery. After the button cell is subjected to 100 cycles at a current of 0.5C, the electrochemical discharge cycle test result chart is shown in FIG. 1, and the discharge specific capacity can still reach 152mAh/g. The material has good cycle performance.
Example 2
According to the functional electrolyte provided by the embodiment, 0.015g of commercial gamma nano-scale alumina is dissolved in 3g of original electrolyte, and a clarified solution is obtained after magnetic stirring at 25 ℃ for 12 hours, namely the functional electrolyte.
The content of iron ions in the gamma nano-scale alumina is 170ppm.
The original electrolyte consists of 1.52g of LiPF 6 0.88g of ethylene carbonate, 0.90g of dimethyl carbonate and 1.04g of ethyl methyl carbonate.
A CR2032 type button cell is prepared by preparing Ni-Co-Mn ternary material, conductive acetylene black and PVDF according to a mass ratio of 8/1/1, adding a proper amount of N-methyl-2-pyrrolidone solvent (the addition of the solvent enables the slurry of the Ni-Co-Mn ternary material, the conductive acetylene black and the PVDF in a thick state to meet the requirements after being dissolved), stirring the mixture into uniform slurry, coating the uniform slurry on a current collector aluminum foil, drying the current collector aluminum foil in a vacuum oven at 60 ℃ for 12 hours after the solvent is dried, and then uniformly cutting the current collector aluminum foil into wafers with the diameter of 13 mm. In a glove box filled with high-purity argon, the CR2032 button battery is assembled by taking the cut electrode as a positive electrode, lithium metal foil as a negative electrode, the functional electrolyte as electrolyte and Celgard 2400 membrane as a diaphragm. And testing the performance of the prepared lithium ion battery. After the button cell is subjected to 100 cycles at a current of 0.5C, the electrochemical discharge cycle test result chart is shown in fig. 2, and the discharge specific capacity can still reach 163mAh/g. The material has good cycle performance.
Example 3
In the functional electrolyte provided in this example, 0.0225g of commercial gamma nano-scale alumina was dissolved in 3g of the original electrolyte, and a clear solution was obtained after magnetic stirring at 25 ℃ for 12 hours, namely the functional electrolyte.
The content of iron ions in the gamma nano-scale alumina is 170ppm.
The original electrolyte consists of 1.52g of LiPF 6 0.88g of ethylene carbonate, 0.90g of dimethyl carbonate and 1.04g of ethyl methyl carbonate.
A CR2032 type button cell is prepared by preparing Ni-Co-Mn ternary material, conductive acetylene black and PVDF according to a mass ratio of 8/1/1, adding a proper amount of N-methyl-2-pyrrolidone solvent (the addition of the solvent enables the slurry of the Ni-Co-Mn ternary material, the conductive acetylene black and the PVDF in a thick state to meet the requirements after being dissolved), stirring the mixture into uniform slurry, coating the uniform slurry on a current collector aluminum foil, drying the current collector aluminum foil in a vacuum oven at 60 ℃ for 12 hours after the solvent is dried, and then uniformly cutting the current collector aluminum foil into wafers with the diameter of 13 mm. In a glove box filled with high-purity argon, the CR2032 button battery is assembled by taking the cut electrode as a positive electrode, lithium metal foil as a negative electrode, the functional electrolyte as electrolyte and Celgard 2400 membrane as a diaphragm. And testing the performance of the prepared lithium ion battery. After the button cell is subjected to 100 cycles at a current of 0.5C, the electrochemical discharge cycle test result chart is shown in fig. 3, and the discharge specific capacity can still reach 154mAh/g, which indicates that the material has good cycle performance.
Example 4
According to the functional electrolyte provided by the embodiment, 0.03g of commercial gamma nano-scale alumina is dissolved in 3g of original electrolyte, and a clarified solution is obtained after magnetic stirring at 25 ℃ for 12 hours, namely the functional electrolyte.
The content of iron ions in the gamma nano-scale alumina is 170ppm.
The original electrolyte consists of 1.52g of LiPF 6 0.88g of ethylene carbonate, 0.90g of dimethyl carbonate and 1.04g of ethyl methyl carbonate.
A CR2032 type button cell is prepared by preparing Ni-Co-Mn ternary material, conductive acetylene black and PVDF according to a mass ratio of 8/1/1, adding a proper amount of N-methyl-2-pyrrolidone solvent (the addition of the solvent enables the slurry of the Ni-Co-Mn ternary material, the conductive acetylene black and the PVDF in a thick state to meet the requirements after being dissolved), stirring the mixture into uniform slurry, coating the uniform slurry on a current collector aluminum foil, drying the current collector aluminum foil in a vacuum oven at 60 ℃ for 12 hours after the solvent is dried, and then uniformly cutting the current collector aluminum foil into wafers with the diameter of 13 mm. In a glove box filled with high-purity argon, the CR2032 button battery is assembled by taking the cut electrode as a positive electrode, lithium metal foil as a negative electrode, the functional electrolyte as electrolyte and Celgard 2400 membrane as a diaphragm. And testing the performance of the prepared lithium ion battery. After the button cell is subjected to 100 cycles at a current of 0.5C, the electrochemical discharge cycle test result chart is shown in fig. 4, and the specific discharge capacity can still reach 142mAh/g. The material has good cycle performance.
Example 5
According to the functional electrolyte provided by the embodiment, 0.015g of commercial gamma nano alumina is dissolved in 3g of original electrolyte, and a clarified solution is obtained after magnetic stirring at 25 ℃ for 12 hours, namely the functional electrolyte.
The content of iron ions in the gamma nano-scale alumina is 350ppm.
The original electrolyte consists of 1.52g of LiPF 6 0.88g of ethylene carbonate, 0.90g of dimethyl carbonate and 1.04g of ethyl methyl carbonate.
A CR2032 type button cell is prepared by preparing Ni-Co-Mn ternary material, conductive acetylene black and PVDF according to a mass ratio of 8/1/1, adding a proper amount of N-methyl-2-pyrrolidone solvent (the addition of the solvent enables the slurry of the Ni-Co-Mn ternary material, the conductive acetylene black and the PVDF in a thick state to meet the requirements after being dissolved), stirring the mixture into uniform slurry, coating the uniform slurry on a current collector aluminum foil, drying the current collector aluminum foil in a vacuum oven at 60 ℃ for 12 hours after the solvent is dried, and then uniformly cutting the current collector aluminum foil into wafers with the diameter of 13 mm. In a glove box filled with high-purity argon, the CR2032 button battery is assembled by taking the cut electrode as a positive electrode, lithium metal foil as a negative electrode, the functional electrolyte as electrolyte and Celgard 2400 membrane as a diaphragm. And testing the performance of the prepared lithium ion battery. After 100 times of cycles of the button cell under the current of 0.5C, the specific discharge capacity can still reach 165mAh/g. The material has good cycle performance.
In conclusion, the method is simple and effective, is convenient to operate, has good electrochemical testing performance, and the specific discharge capacity of 0.5% of alumina added under 0.5C current after 100 cycles can still reach 163mAh/g.
The embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, and yet fall within the scope of the invention.
Claims (8)
1. An alumina modified functional electrolyte is characterized in that alumina is added into a electrolyte containing LiPF 6 Stirring for 10-20h at normal temperature to obtain functional electrolyte;
the addition amount of the aluminum oxide is 0.25-1wt%.
2. The alumina modified functional electrolyte of claim 1, wherein the mixed solution is a mixture of ethylene carbonate, dimethyl carbonate and ethylmethyl carbonate.
3. The alumina modified functional electrolyte of claim 1, wherein the molar ratio of ethylene carbonate, dimethyl carbonate and ethylmethyl carbonate is 1:1:1.
4. The alumina modified functional electrolyte of claim 1, wherein the alumina is gamma nano-scale alumina and has an iron ion content of 150-450ppm.
5. A button cell characterized in that an alumina-modified functional electrolyte according to any of claims 1 to 4 is used as the electrolyte.
6. The method for preparing the button cell, as set forth in claim 5, comprising the following steps in order:
1) Adding an Ni-Co-Mn ternary material, conductive acetylene black and PVDF into an N-methyl-2-pyrrolidone solvent, stirring the mixture into uniform slurry by a mixer, coating the slurry on a current collector aluminum foil, drying the slurry in vacuum after the solvent is dried, and uniformly cutting the slurry into electrodes;
2) In a glove box filled with high-purity argon, the CR2032 button battery is assembled by taking the electrode prepared in the step 1) as a positive electrode, lithium metal foil as a negative electrode, the alumina-modified functional electrolyte as an electrolyte and a Celgard membrane as a diaphragm according to any of claims 1-4.
7. The preparation method of the button cell, according to claim 6, wherein the mass ratio of the ternary material, the conductive agent acetylene black and the binder PVDF is 8:1:1.
8. The method for manufacturing a button cell according to claim 6, wherein the vacuum drying in step 1) is performed in a vacuum oven at 60 ℃ for 10-15 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311564773.8A CN117594870A (en) | 2023-11-21 | 2023-11-21 | Alumina modified functional electrolyte and button cell thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311564773.8A CN117594870A (en) | 2023-11-21 | 2023-11-21 | Alumina modified functional electrolyte and button cell thereof |
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