CN116454217A - Has Li 3 N artificial SEI film lithium electrode and preparation method and application thereof - Google Patents
Has Li 3 N artificial SEI film lithium electrode and preparation method and application thereof Download PDFInfo
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- CN116454217A CN116454217A CN202310581238.7A CN202310581238A CN116454217A CN 116454217 A CN116454217 A CN 116454217A CN 202310581238 A CN202310581238 A CN 202310581238A CN 116454217 A CN116454217 A CN 116454217A
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- sei film
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 72
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 17
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 12
- 239000011888 foil Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000000151 deposition Methods 0.000 claims abstract description 5
- 239000012495 reaction gas Substances 0.000 claims abstract description 5
- 238000005229 chemical vapour deposition Methods 0.000 claims abstract description 3
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 24
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 22
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 claims description 10
- 229910014276 N-Li Inorganic materials 0.000 claims description 10
- 229910014326 N—Li Inorganic materials 0.000 claims description 10
- 239000004202 carbamide Substances 0.000 claims description 5
- 230000008021 deposition Effects 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims 9
- 229910045601 alloy Inorganic materials 0.000 claims 9
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 4
- IDBFBDSKYCUNPW-UHFFFAOYSA-N lithium nitride Chemical compound [Li]N([Li])[Li] IDBFBDSKYCUNPW-UHFFFAOYSA-N 0.000 abstract 2
- 239000010453 quartz Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000003792 electrolyte Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 5
- BHZCMUVGYXEBMY-UHFFFAOYSA-N trilithium;azanide Chemical compound [Li+].[Li+].[Li+].[NH2-] BHZCMUVGYXEBMY-UHFFFAOYSA-N 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 4
- 210000001787 dendrite Anatomy 0.000 description 4
- 239000003755 preservative agent Substances 0.000 description 4
- 230000002335 preservative effect Effects 0.000 description 4
- 239000007784 solid electrolyte Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000001351 cycling effect Effects 0.000 description 3
- 239000005486 organic electrolyte Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 229910013553 LiNO Inorganic materials 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910018091 Li 2 S Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000034964 establishment of cell polarity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 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
- 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
- H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
-
- 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
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0421—Methods of deposition of the material involving vapour deposition
-
- 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
- H01M2004/027—Negative electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a lithium ion battery with Li 3 The invention discloses an N artificial SEI film lithium electrode and a preparation method and application thereof, and relates to the technical field of lithium electrode preparation. The method comprises the following steps: drying a solid nitrogen source, and then decomposing the solid nitrogen source by adopting a heating or plasma technology to prepare a reaction gas; depositing on the surface of the metal lithium foil by adopting a plasma chemical vapor deposition technology to prepare the lithium ion battery with Li 3 N artificial SEI film lithium electrode. The process flow related by the invention has the advantages of short time, easy operation, little using amount of solid nitrogen source, low cost and high safety coefficient, and meanwhile, the generated artificial SEI film thickness of the lithium nitride is controllable, the mechanical property is good, the uniformity is good, and the invention solves the problems of poor mechanical property, uncontrollable thickness and poor uniformity of the existing lithium nitride layer.
Description
Technical Field
The invention relates to the technical field of lithium electrode preparation, in particular to a lithium ion battery with Li 3 N artificial SEI film lithium electrode and its preparation method and application.
Background
The practical capacity of the existing lithium ion battery taking graphite as a negative electrode is saturated and approaches to the theoretical limit (372 mAh g) -1 ) Greatly limits the development of the electric energy storage industry, and makes it easy to find the next-generation negative electrode material with high specific capacity and high cycle stability. Among the promising candidate materials, lithium metal materials have low density (0.59 g cm) due to their lowest electrochemical potential (-3.04V vs. standard hydrogen electrode) -3 ) And an ultra-high theoretical capacity (3860 mAh g -1 ) Is outstanding. However, lithium metal has various problems such as accumulation of Solid Electrolyte Interface (SEI), growth of lithium dendrite, and huge volume change in the cycling process of the lithium metal as a negative electrode, so that the coulomb efficiency of the Lithium Metal Battery (LMB) is reduced, the actual capacity of the negative electrode is reduced, and safety accidents such as battery short circuit and even explosion caused by the penetration of the lithium dendrite growth through a diaphragm are reduced, thereby impeding the commercialization process of the Lithium Metal Battery (LMB).
In view of the above problems, there are a number of improvement strategies: firstly, constructing a three-dimensional main body; secondly, the solid electrolyte replaces the organic electrolyte; thirdly, the SEI film is constructed on the surface of lithium metal. The three-dimensional main body has high mass occupation, so that the energy density of the lithium metal anode can be greatly sacrificed, and even is lower than that of graphite used as the anode; compared with organic electrolyte, the solid electrolyte has the advantages that the effective contact area between the solid electrolyte and the electrode is reduced, the interface resistance is high, and the transmission performance of lithium ions is greatly reduced; in contrast, designing an SEI film with higher ionic conductivity and high interfacial energy is the most effective improvement strategy, lithium nitride (Li 3 N) because of its high lithium ion conductivity (2.3X10) -3 S cm -1 ) The advantages of high Young's modulus, stability to electrochemical window of lithium metal, low solubility in electrolyte and the like are important points of current research. At present Li 3 The preparation method of the N artificial SEI film mainly comprises the following steps: (1) electrolyte modification: adding nitrate such as (LiNO) to the electrolyte 3 ) To form Li 3 N, the generated SEI film is thinner, the ion conductivity is high,however, the organic electrolyte is volatile, has high toxicity and LiNO 3 The nitrate belongs to dangerous chemicals, is dangerous and forms Li 3 The mechanical properties of the N film are poor; (2) Rolling method: to be commercialized Li 3 N powder is ground and then put on Li foil and rolled, which causes non-uniform thickness of the lithium foil and Li is obtained 3 N artificial SEI film has poor integrity and uniformity; (3) high temperature melting method: exposing molten Li in a nitrogen glove box, or using g-C 3 N 4 And reacting with molten lithium metal at high temperature to obtain Li 3 N, li formed by the method 3 N thickness is uncontrollable, uniformity is poor, operation is inconvenient in a glove box, and high temperature is easy to cause damage of rubber gloves, so that economic loss is caused.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a lithium ion battery with Li 3 An N artificial SEI film lithium electrode, a preparation method and application thereof are provided, so as to solve the problems of poor mechanical property, uncontrollable thickness and poor uniformity of the existing lithium nitride layer.
The technical scheme for solving the technical problems is as follows: provides a lithium ion battery having Li 3 The preparation method of the N artificial SEI film lithium electrode comprises the following steps:
(1) Drying a solid nitrogen source, and then decomposing the solid nitrogen source by adopting a heating or plasma technology to prepare a reaction gas;
(2) Depositing the reaction gas obtained in the step (1) on the surface of a metal lithium foil by adopting a plasma chemical vapor deposition technology to obtain Li-containing lithium ion battery 3 N artificial SEI film lithium electrode.
Based on the technical scheme, the invention can also be improved as follows:
further, in step (1), the solid nitrogen source is urea, thiourea or ammonium bifluoride.
Further, in the step (1), drying is performed at 20 to 60 ℃.
Further, in the step (1), heating is performed at 180 to 220 ℃.
Further, in the step (1), the mass of the solid nitrogen source is 1-5g.
Further, in the step (2), the diameter of the metal lithium foil is 10-15mm.
Further, in the step (2), the deposition is carried out for 1-10min under the condition of 100-500W of power.
Further, in the step (2), when the solid nitrogen source of the step (1) is thiourea, li is obtained 3 N-Li 2 S artificial SEI film lithium electrode.
The invention also provides the Li prepared by the method 3 N artificial SEI film lithium electrode.
The invention also provides the Li 3 Application of N artificial SEI film lithium electrode in symmetrical battery assembly.
The invention has the following beneficial effects:
the invention has the innovation points that the solid nitrogen source is adopted as plasma, the PECVD technology is utilized to prepare the lithium nitride on the surface of the lithium metal, the process flow related by the invention has the advantages of short time, easy operation, little using amount of the solid nitrogen source, low cost and high safety factor, and meanwhile, the generated artificial SEI film thickness of the lithium nitride is controllable, the mechanical property is good, the uniformity is good, and the problems of the traditional method are overcome. In addition, the solid nitrogen source has good expandability, and other artificial SEI films and lithium nitride SEI films can be formed to cooperatively protect the lithium metal cathode.
Drawings
Fig. 1 is an XPS diagram of a lithium electrode prepared in example 1;
fig. 2 is an XPS diagram of the lithium electrode prepared in example 1;
fig. 3 is an XPS diagram of the lithium electrode prepared in example 2;
fig. 4 is an XPS diagram of the lithium electrode prepared in example 2;
fig. 5 is an XPS diagram of the lithium electrode prepared in example 3;
FIG. 6 is Li produced in example 1 3 Long cycle performance plots for N/Li symmetric cells and bare Li symmetric cells;
FIG. 7 is Li produced in example 2 3 N-Li 2 Long cycle performance graphs for S/Li symmetric cells and bare Li symmetric cells.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1:
has Li 3 The preparation method of the N artificial SEI film lithium electrode comprises the following steps:
(1) Under the air atmosphere, 4g of solid nitrogen source urea is put into a glass container, and is dried at 50 ℃ to remove water;
(2) Cutting a metal lithium foil into a round shape with the diameter of 12mm in a glove box, and placing the round shape into the middle part of a quartz tube to the left for sealing; taking out the glass container containing urea from the oven, connecting the glass container with the right side of the quartz tube, sleeving a heating sleeve, heating the glass container to 200 ℃, simultaneously placing the positive electrode of PECVD on the right side of the quartz tube and the negative electrode on the side of lithium metal, and processing for 1min under the condition of 300W of power to obtain the glass container with Li 3 N artificial SEI film lithium electrode.
Example 2:
has Li 3 N-Li 2 S artificial SEI film lithium electrode, its preparation method includes the following steps:
(1) Weighing 4g of thiourea in an air atmosphere, placing the thiourea in a crucible, drying the thiourea in an environment of 50 ℃, removing water in the thiourea, covering the surface of the crucible with a preservative film after the thiourea is dried, and rapidly transferring the crucible into a glove box;
(2) Cutting metal lithium foil into a round shape with a diameter of 12mm in a glove box, placing the round shape on the left side of the middle part of a quartz tube, removing a preservative film on the surface of a crucible containing thiourea, placing the right side of the quartz tube (a certain distance from a lithium sheet) for sealing, placing a positive electrode of PECVD on one side of the quartz tube containing thiourea and a negative electrode on the other side, and processing for 2min under the condition of 300W of power to obtain Li-containing lithium ion battery 3 N-Li 2 S artificial SEI film lithium electrode.
Example 3:
has Li 3 The preparation method of the N artificial SEI film lithium electrode comprises the following steps:
(1) Weighing 2g of ammonium bifluoride in an air atmosphere, placing the ammonium bifluoride in a crucible, drying the ammonium bifluoride in an environment of 20 ℃, removing water in the ammonium bifluoride, covering the surface of the crucible with a preservative film after the ammonium bifluoride is dried, and rapidly transferring the crucible into a glove box;
(2) Cutting metal lithium foil into a round shape with a diameter of 12mm in a glove box, placing the round shape on the left side of the middle part of a quartz tube, removing a preservative film on the surface of a crucible filled with ammonium bifluoride, placing the round shape on the right side of the quartz tube (a certain distance from a lithium sheet), sealing, placing a positive electrode of PECVD (plasma enhanced chemical vapor deposition) on one side of the quartz tube where ammonium bifluoride is placed, placing a negative electrode on the other side, and processing for 10min under the condition of 100W of power to obtain the lithium ion battery with Li 3 N artificial SEI film lithium electrode.
Test examples
1. XPS detection was performed on the lithium electrodes with artificial SEI films prepared in examples 1-3, and the results are shown in FIGS. 1-5.
As can be seen from fig. 1-2, treatment of lithium metal with urea as a plasma source produced Li 3 N SEI film.
As can be seen from fig. 3-4, treatment of lithium metal with thiourea as a plasma source produced Li 3 N and Li 2 S two SEI films.
As can be seen from fig. 5, treatment of lithium metal with ammonium bifluoride as a plasma source produced Li 3 N SEI film.
2. The product of example 1 was prepared to have Li 3 N artificial SEI film lithium electrode (Li) 3 N/Li) and a lithium electrode without artificial SEI film (bare Li) were assembled separately to measure the long cycle performance in an ester electrolyte, and the results are shown in FIG. 6 (200 on the abscissa, li on the narrow side) 3 N/Li)。
As can be seen from FIG. 6, in the ester electrolyte, li obtained in example 1 3 N/Li assembled symmetrical cell polarization after cycling over 200 hoursSymmetrical battery assembled with less voltage than bare Li, indicating Li generated 3 The N artificial SEI film can relieve the growth of lithium dendrites and prolong the service life of a battery.
3. The product of example 2 was prepared to have Li 3 N-Li 2 S artificial SEI film lithium electrode (Li) 3 N-Li 2 S/Li) and lithium electrode without artificial SEI film (bare Li) were assembled separately to measure the long cycle performance in ether electrolyte, and the results are shown in FIG. 7 (200 on the abscissa, li on the narrow side) 3 N-Li 2 S/Li)。
As can be seen from FIG. 7, li obtained in example 2 3 N-Li 2 The polarization voltage of the S/Li assembled symmetrical battery is smaller than that of the bare Li symmetrical battery, and the cycling stability is stronger than that of the bare Li assembled battery, which shows that the generated Li 3 N-Li 2 The S artificial SEI film can relieve the growth of lithium dendrites and prolong the service life of a battery.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. Has Li 3 The preparation method of the N artificial SEI film lithium electrode is characterized by comprising the following steps of:
(1) Drying a solid nitrogen source, and then decomposing the solid nitrogen source by adopting a heating or plasma technology to prepare a reaction gas;
(2) Depositing the reaction gas obtained in the step (1) on the surface of a metal lithium foil by adopting a plasma chemical vapor deposition technology to obtain Li-containing lithium ion battery 3 N artificial SEI film lithium electrode.
2. The alloy of claim 1 having Li 3 The preparation method of the N artificial SEI film lithium electrode is characterized in that in the step (1), the solid nitrogen source is urea, thiourea or ammonium bifluoride.
3. The alloy of claim 1 having Li 3 N artificial SEI film lithium electrodeThe preparation method is characterized in that in the step (1), drying is carried out at 20-60 ℃.
4. The alloy of claim 1 having Li 3 The preparation method of the N artificial SEI film lithium electrode is characterized in that in the step (1), heating is carried out at 180-220 ℃.
5. The alloy of claim 1 having Li 3 The preparation method of the N artificial SEI film lithium electrode is characterized in that in the step (1), the mass of a solid nitrogen source is 1-5g.
6. The alloy of claim 1 having Li 3 The preparation method of the N artificial SEI film lithium electrode is characterized in that in the step (2), the diameter of the metal lithium foil is 10-15mm.
7. The alloy of claim 1 having Li 3 The preparation method of the N artificial SEI film lithium electrode is characterized in that in the step (2), the deposition is carried out for 1-10min under the condition of 100-500W of power.
8. The alloy of claim 1 having Li 3 The preparation method of the N artificial SEI film lithium electrode is characterized in that in the step (2), when the solid nitrogen source in the step (1) is thiourea, li is prepared 3 N-Li 2 S artificial SEI film lithium electrode.
9. The alloy of any one of claims 1-8 having Li 3 N artificial SEI film lithium electrode prepared by preparation method and provided with Li 3 N artificial SEI film lithium electrode.
10. The alloy of claim 9 having Li 3 Application of N artificial SEI film lithium electrode in symmetrical battery assembly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310581238.7A CN116454217A (en) | 2023-05-22 | 2023-05-22 | Has Li 3 N artificial SEI film lithium electrode and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310581238.7A CN116454217A (en) | 2023-05-22 | 2023-05-22 | Has Li 3 N artificial SEI film lithium electrode and preparation method and application thereof |
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