CN111129437A - Method for passivating surface of lithium cathode - Google Patents
Method for passivating surface of lithium cathode Download PDFInfo
- Publication number
- CN111129437A CN111129437A CN201911418097.7A CN201911418097A CN111129437A CN 111129437 A CN111129437 A CN 111129437A CN 201911418097 A CN201911418097 A CN 201911418097A CN 111129437 A CN111129437 A CN 111129437A
- Authority
- CN
- China
- Prior art keywords
- lithium
- metal
- salt
- organic solvent
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- H01M4/0438—Processes of manufacture in general by electrochemical processing
- H01M4/045—Electrochemical coating; Electrochemical impregnation
- H01M4/0452—Electrochemical coating; Electrochemical impregnation from solutions
-
- 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
- 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 provides a method for passivating the surface of a lithium cathode, which comprises the following steps: A) mixing lithium salt and an organic solvent to obtain a mixed solution; pretreating the surface of the metal lithium sheet; B) placing the metal lithium sheet obtained in the step A) in a mixed solution, and reacting under electrochemical drive; C) and B), repeating the treatment of the metal lithium sheet according to the step B). The application provides a method for passivating the surface of a lithium cathode, which is characterized in that a specific lithium salt and an organic solvent are adopted to prepare a high-concentration lithium salt solution, so that the prepared passivation layer realizes the consideration and adjustment of thickness, mechanical strength, lithium ion migration capacity and isolation capacity.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a method for passivating the surface of a lithium cathode.
Background
The chemical activity of the surface of the metallic lithium negative electrode is one of the causes of failure of the metallic lithium negative electrode. In view of how passivation or protection of the surface of the lithium metal negative electrode is achieved is very important, and therefore a passivation layer of the surface of the lithium metal negative electrode is essential. The passivation layer is required to have excellent mechanical strength, migration speed of lithium ions therebetween, and ability to isolate the electrolyte/metallic lithium negative electrode at the same time. Therefore, the realization of the ideal surface passivation of metallic lithium requires the simultaneous satisfaction of the above three conditions.
Conventional surface passivation methods are numerous, for example: applying an additional protective layer which, although having exceptionally good isolation and mechanical strength, is not well controlled with respect to uniformity and thickness; in another method, the activity of the surface of the metallic lithium cathode is utilized to directly react with other solvents, the reaction is characterized in that the reaction time is controlled to control the thickness, and then the components of the reaction have fewer designed components in advance, so that higher mechanical strength is difficult to realize. Therefore, in the prior art, the surface passivation of the metal lithium is difficult to realize the simultaneous consideration of thickness, isolation capability, mechanical strength and lithium ion migration capability.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for passivating the surface of a lithium cathode, which can realize the consideration and adjustment of thickness, mechanical strength, lithium ion migration capability and isolation capability of a prepared passivation layer.
In view of the above, the present application provides a method for passivating a surface of a lithium negative electrode, comprising the steps of:
A) mixing lithium salt and an organic solvent to obtain a mixed solution;
pretreating the surface of the metal lithium sheet;
B) placing the metal lithium sheet obtained in the step A) in a mixed solution, and reacting under electrochemical drive;
C) according to the step B), repeatedly carrying out treatment on the metal lithium sheet;
the lithium salt is a large anion lithium salt containing fluorine elements and less hydrogen elements;
the organic solvent contains fluorine elements, an acetal structure and less hydrogen elements;
the concentration of lithium salt in the mixed solution is 4.0-20.0M.
Preferably, the lithium salt is selected from one or more of lithium bis (fluorosulfonyl) imide, lithium hexafluorophosphate, lithium bis (trifluoromethanesulfonyl) imide, lithium trifluoromethanesulfonate, lithium nonafluoro-1-butanesulfonate, lithium 2- (perfluoroalkyl) ethyl methacrylate, lithium tetrafluoroborate, lithium hexafluoroaluminate, lithium hexafluoroarsenate, lithium trifluoroacetate, lithium hexafluorosilicate, lithium difluorophosphate, lithium difluoroacetate, lithium hexafluoroantimonate, lithium perfluorohexane sulfonate and lithium 1,1,2,2,3, 3-hexafluoropropane-1, 3-disulfonimide.
Preferably, the lithium salt is selected from lithium nonafluoro-1-butanesulfonate, lithium perfluorohexanesulfonate or lithium 1,1,2,2,3, 3-hexafluoropropane-1, 3-disulfonylimide.
Preferably, the organic solvent is selected from one or more of methyl nonafluorobutyl ether, perfluoroethane, perfluorotributylamine, pentadecafluorotriethylamine, perfluoro-1-butylsulfonyl fluoride, tris (2, 2, 2-trifluoroethyl) phosphate, perfluorodecalin, perfluorodecyl trichlorosilane, perfluoroiodobutane and isoflurane.
Preferably, the organic solvent is selected from methyl nonafluorobutyl ether, tris (2, 2, 2-trifluoroethyl) phosphate, perfluorodecyl trichlorosilane or isoflurane.
Preferably, the concentration of the lithium salt is 6.0-12.0M.
Preferably, the electrochemical driving mode is as follows:
and (3-5) dry batteries with 1.5V are short-circuited at two ends of the lithium sheet.
Preferably, the thickness of the lithium sheet is 45-200 μm.
Preferably, the reaction time is 1-3 min.
Preferably, the number of times of repeating the treatment of the lithium metal sheet is 2 to 5 times.
The application provides a method for passivating the surface of a lithium cathode, which is characterized by preparing a high-concentration lithium salt solution, placing a lithium sheet in the lithium salt solution to react under the action of electrochemical drive, and repeating the reaction for multiple times, so that the consideration and the adjustment of thickness, mechanical strength, lithium ion migration capacity and isolation capacity can be realized; in the method, the reaction of lithium salt, organic solvent and the metal lithium sheet is promoted in an electrochemical driving mode, so that the control of the thickness of the passivation layer is realized; the acetal structure in the organic solvent is beneficial to the polymerization of the organic solvent, a softer passivation layer can be provided, and certain stress change can be met; the lithium salt and the fluorine-containing element and the small amount of hydrogen element in the organic solvent can provide enough LiF to improve the lithium ion migration capacity, and the small amount of LiH can greatly reduce the gap and the pore of the passivation layer and improve the compactness of the passivation layer; and the use of the high-concentration lithium salt solution can greatly improve the compactness of the passivation layer reaction and regulate and control the blocking capability of the solvent.
Drawings
FIG. 1 is a photograph of the surface topography of the pole piece before and after passivation according to examples 1 and 2 of the present invention;
FIG. 2 is a SEM photograph of the electrode plate prepared in example 2 after circulation without and with a passivation layer;
FIG. 3 is a cross-sectional SEM photograph of the pole piece prepared in example 2 of the present invention after cycling;
fig. 4 is a graph of lithium ion mobility data for lithium negative electrodes of examples 1 and 2 of the present invention;
fig. 5 is a graph comparing cycle performance data for lithium negative electrodes and untreated lithium plates of examples 1 and 2 of the present invention.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
In view of the problem that the thickness, the isolation capacity, the mechanical strength and the lithium ion migration capacity are difficult to be considered in the process of passivating the surface of the metal lithium in the prior art, the method realizes the synchronous regulation of the thickness, the mechanical strength, the lithium ion migration capacity and the isolation capacity by controlling the solvation structure in the process of the in-situ surface reaction of the lithium and regulating and controlling substances participating in the reaction. Specifically, the method for passivating the surface of the lithium negative electrode comprises the following steps:
A) mixing lithium salt and an organic solvent to obtain a mixed solution;
pretreating the surface of the metal lithium sheet;
B) placing the metal lithium sheet obtained in the step A) in a mixed solution, and reacting under electrochemical drive;
C) according to the step B), repeatedly carrying out treatment on the metal lithium sheet;
the lithium salt is a large anion lithium salt containing fluorine elements and less hydrogen elements;
the organic solvent contains fluorine elements, an acetal structure and less hydrogen elements;
the concentration of lithium salt in the mixed solution is 4.0-20M.
In the process of passivating the surface of a lithium negative electrode, firstly, preparing raw materials, and mixing a lithium salt with an organic solvent to obtain a mixed solution, wherein the lithium salt and the organic solvent are not lithium salts and organic solvents which are well known to those skilled in the art, and specifically, the lithium salt is a large anion lithium salt containing fluorine elements and having a small hydrogen element content; furthermore, the lithium salt has single and simple constituent elements, has higher potential and is easy to react with solvent electrons; more specifically, the lithium salt is selected from one or more of lithium bis (fluorosulfonyl) imide, lithium hexafluorophosphate, lithium bis (trifluoromethanesulfonyl) imide, lithium trifluoromethanesulfonate, lithium nonafluoro-1-butanesulfonate, 2- (perfluoroalkyl) ethyl methacrylate, lithium tetrafluoroborate, lithium hexafluoroaluminate, lithium hexafluoroarsenate, lithium trifluoroacetate, lithium hexafluorosilicate, lithium difluorophosphate, lithium difluoroacetate, lithium hexafluoroantimonate, lithium perfluorohexane sulfonate and lithium 1,1,2,2,3, 3-hexafluoropropane-1, 3-disulfonyl imide; in particular embodiments, the lithium salt is selected from lithium nonafluoro-1-butanesulfonate, lithium perfluorohexanesulfonate, or lithium 1,1,2,2,3, 3-hexafluoropropane-1, 3-disulfonylimide, and the like. The organic solvent is an organic solvent which contains fluorine elements, contains an acetal structure and is less in hydrogen elements, furthermore, the element bonded with the C element is preferably not hydrogen elements, the solvent also has higher potential, is easy to react with solvent electrons, has better solubility on lithium salt, and is not suitable for overlarge molecular weight; more specifically, the organic solvent is selected from one or more of methyl nonafluorobutyl ether, perfluoroethane, perfluorotributylamine, pentadecafluorotriethylamine, perfluoro-1-butylsulfonyl fluoride, tris (2, 2, 2-trifluoroethyl) phosphate, perfluorodecalin, perfluorodecyl trichlorosilane, perfluoroiodobutane and isoflurane; in particular embodiments, the organic solvent is selected from methyl nonafluorobutyl ether, tris (2, 2, 2-trifluoroethyl) phosphate, perfluorodecyl trichlorosilane, or isoflurane.
The mixed solution is a high-concentration lithium salt solution, specifically 4.0-20.0M, and in a specific embodiment, the concentration of the mixed solution is 6.0-12.0M. The concentration of the lithium salt affects the characteristics of the passivation layer, the high concentration of the lithium salt in the solvent can lead the lithium ion to have a solvation structure, and the lithium ion is surrounded by the solvent and the anion together, so that in the passivation process, more anions and the solvent are subjected to chemical reaction to generate the passivation layer, therefore, the concentration of the lithium salt is extremely critical, and the required solvation structure can be ensured by maintaining the high concentration of the lithium salt.
After the above-mentioned mixed solution is prepared, one of the key parts of the process is completed. The application requires that the surface of the lithium metal sheet be pretreated according to pretreatment methods well known to those skilled in the art, and for example, chemical polishing can be used.
This application then places the lithium piece after the preliminary treatment in mixed solution, reacts under the electrochemistry drive, the electrochemistry drive is gone on for the well-known mode of technical staff in the field, and in this application, the electrochemistry drive adopts the mode of dry battery short circuit to go on, is about to pass through the wire with the both ends of lithium piece after 3 sections 1.5V's dry battery is established ties. The reaction time is 1-3 min, and the preferable time is 1-1.5 min. The thickness of the lithium sheet is 45-200 μm, and the thickness is preferably 75-100 μm.
And repeating the operation of placing the lithium sheet in the mixed solution to react under electrochemical drive for 2-5 times in order to form a passivation layer with a certain thickness until the surface passivation layer meets the requirement.
According to the method for passivating the surface of the lithium cathode, provided by the application, through regulation and control of a solvation structure, in a high-concentration lithium salt system, lithium ions can be combined with solvent molecules and anions at the same time, so that the whole lithium salt solution is lack of free solvents and anions, and therefore in the process of electrochemical reaction with lithium, the solvents and the anions in the system can participate in formation of a surface passivation layer. Therefore, the lithium salt is screened, organic functional groups with biased F enrichment are selected, and meanwhile organic components on the organic lithium salt can participate in the formation of a passivation layer; meanwhile, the composite F organic liquid is selected, so that inorganic matters with more lithium and fluorine can be generated when solvent molecules participate in the reaction, and the influence on the components of the passivation layer is large; furthermore, the method of short connection of the dry battery can accelerate the reaction process and is beneficial to controlling the reaction degree. Therefore, the method for passivating the surface of the lithium negative electrode provided by the application realizes the simultaneous adjustment of thickness, mechanical strength, lithium ion migration capacity and isolation capacity.
For further understanding of the present invention, the following examples are provided to illustrate the method for passivating the surface of a lithium negative electrode according to the present invention, and the scope of the present invention is not limited by the following examples.
Example 1
1) Dissolving 20g of lithium nonafluoro-1-butanesulfonate in 20mL of methyl nonafluoro butyl ether, heating to 60 ℃, magnetically stirring for 24h, and pouring into a culture dish with the diameter of 70mm after the lithium nonafluoro-1-butanesulfonate is completely dissolved;
2) putting the metal lithium foil into tetrahydrofuran (100 mL)/biphenyl (1g) solution to clean a surface oxide layer, then immersing the metal lithium foil into the tetrahydrofuran solution to clean for 3 times, and connecting two ends of the metal lithium foil through a lead when the tetrahydrofuran on the surface is completely volatilized;
3) putting the metal lithium foil in the step 2) into the solution in the step 1), connecting 3 dry battery packs through leads at two ends, starting timing, taking out the metal lithium foil after waiting for 3min, separating the metal lithium foil from the dry battery packs, washing 5 times with methyl nonafluorobutyl ether, soaking the metal lithium foil in tetrahydrofuran and dimethyl carbonate solutions for 1h respectively, and taking out a pole piece after the dimethyl carbonate is volatilized to dry;
example 2
1) Dissolving 80g of lithium perfluorohexane sulfonate in 30mL of tris (2, 2, 2-trifluoroethyl) phosphate, heating to 80 ℃, magnetically stirring for 12h, and pouring into a culture dish with the diameter of 70mm after the lithium perfluorohexane sulfonate is completely dissolved;
2) putting the metal lithium foil into tetrahydrofuran (100 mL)/biphenyl (1g) solution to clean a surface oxide layer, then immersing the metal lithium foil into the tetrahydrofuran solution to clean for 3 times, and connecting two ends of the metal lithium foil through a lead when the tetrahydrofuran on the surface is completely volatilized;
3) putting the metal lithium foil in the step 2) into the solution in the step 1), connecting 5 dry battery packs through wires at two ends, starting timing, taking out the metal lithium foil after waiting for 1min, separating the metal lithium foil from the dry battery packs, washing the metal lithium foil with tris (2, 2, 2-trifluoroethyl) phosphate for 5 times, then respectively soaking the metal lithium foil in tetrahydrofuran and dimethyl carbonate solutions for 1h, and taking out the pole piece after the dimethyl carbonate is volatilized to dry.
The pole pieces prepared in example 1 and example 2 were placed in an SEM chamber for observation of surface features, and the results are shown in fig. 1; the obtained lithium metal pole piece is assembled into a lithium symmetric battery (namely the lithium metal pole piece and the lithium metal pole piece are assembled into a button battery), and the area current density is 0.5mA cm-2Specific area capacity of 3mAh cm-2The result of the cycling test under the condition of (1) is shown in fig. 5, and it can be known from fig. 5 that the voltage of the lithium cathode with the surface passivation layer is stable and has a lower polarization voltage in the lithium-lithium symmetric cycle, and the voltage of the electrode is maintained unchanged in the cycling process; analyzing the processed material obtained in the embodiment 2 by using a scanning electron microscope to obtain scanning electron micrographs as shown in fig. 2 and 3, wherein the thickness of the surface passivation layer is thinner as shown in fig. 3, and the surface appearance of the negative electrode with the surface passivation layer is still flat after multiple cycles as shown in fig. 2, but the surface dendrite grows seriously without the pole piece with the passivation layer; the pole pieces with the surface coatings are assembled into the symmetric battery without the diaphragm, and the lithium ion migration number performance of the battery is tested, and the result is shown in fig. 4, as can be seen from fig. 4, the symmetric batteries composed of the example 1 and the example 2 have higher lithium ion migration capacity, which indicates that the lithium ion migration capacity of the surface passivation layer is enhanced, and meanwhile, the surface passivation layer is perfect, so that the short circuit of metal lithium can be avoided.
Example 3
1) Dissolving 60g of 1,1,2,2,3, 3-hexafluoropropane-1, 3-disulfonimide lithium in 30mL of isoflurane, heating to 40 ℃, magnetically stirring for 48 hours, and pouring into a culture dish with the diameter of 70mm after the lithium is completely dissolved;
2) putting the metal lithium foil into tetrahydrofuran (100 mL)/biphenyl (1g) solution to clean a surface oxide layer, then immersing the metal lithium foil into the tetrahydrofuran solution to clean for 3 times, and connecting two ends of the metal lithium foil through a lead when the tetrahydrofuran on the surface is completely volatilized;
3) putting the metal lithium foil in the step 2) into the solution in the step 1), connecting 3 dry battery packs through leads at two ends, starting timing, taking out the metal lithium foil after waiting for 2min, separating the metal lithium foil from the dry battery packs, washing 5 times with isoflurane, soaking the metal lithium foil in tetrahydrofuran and dimethyl carbonate solutions for 1h respectively, and taking out the pole piece after the dimethyl carbonate is volatilized to dry.
Example 4
1) Dissolving 46g of lithium hexafluoroarsenate in 30mL of perfluorobutane iodide, heating to 60 ℃, magnetically stirring for 48 hours, and pouring into a culture dish with the diameter of 70mm after the lithium hexafluoroarsenate is completely dissolved;
2) putting the metal lithium foil into tetrahydrofuran (100 mL)/biphenyl (1g) solution to clean a surface oxide layer, then immersing the metal lithium foil into the tetrahydrofuran solution to clean for 3 times, and connecting two ends of the metal lithium foil through a lead when the tetrahydrofuran on the surface is completely volatilized;
3) putting the metal lithium foil in the step 2) into the solution in the step 1), connecting 5 dry battery packs through wires at two ends, starting timing, taking out the metal lithium foil after waiting for 3min, separating the metal lithium foil from the dry battery packs, washing with perfluoroiodobutane for 5 times, soaking in tetrahydrofuran and dimethyl carbonate solutions for 1h respectively, and taking out the pole piece after the dimethyl carbonate is volatilized to dry.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of surface passivation of a lithium negative electrode, comprising the steps of:
A) mixing lithium salt and an organic solvent to obtain a mixed solution;
pretreating the surface of the metal lithium sheet;
B) placing the metal lithium sheet obtained in the step A) in a mixed solution, and reacting under electrochemical drive;
C) according to the step B), repeatedly carrying out treatment on the metal lithium sheet;
the lithium salt is a large anion lithium salt containing fluorine elements and less hydrogen elements;
the organic solvent contains fluorine elements, an acetal structure and less hydrogen elements;
the concentration of lithium salt in the mixed solution is 4.0-20.0M.
2. The method of claim 1, wherein the lithium salt is selected from one or more of lithium bis-fluorosulfonylimide, lithium hexafluorophosphate, lithium bis-trifluoromethanesulfonylimide, lithium trifluoromethanesulfonate, lithium nonafluoro-1-butanesulfonate, 2- (perfluoroalkyl) ethyl methacrylate, lithium tetrafluoroborate, lithium hexafluoroaluminate, lithium hexafluoroarsenate, lithium trifluoroacetate, lithium hexafluorosilicate, lithium difluorophosphate, lithium difluoroacetate, lithium hexafluoroantimonate, lithium perfluorohexanesulfonate, and lithium 1,1,2,2,3, 3-hexafluoropropane-1, 3-disulfonylimide.
3. The method of claim 1, wherein the lithium salt is selected from the group consisting of lithium nonafluoro-1-butanesulfonate, lithium perfluorohexanesulfonate, and lithium 1,1,2,2,3, 3-hexafluoropropane-1, 3-disulfonimide.
4. The method according to claim 1, wherein the organic solvent is selected from one or more of methyl nonafluorobutyl ether, perfluoroethane, perfluorotributylamine, pentadecafluorotriethylamine, perfluoro-1-butylsulfonyl fluoride, tris (2, 2, 2-trifluoroethyl) phosphate, perfluorodecalin, perfluorodecyl trichlorosilane, perfluoroiodobutane and isoflurane.
5. The method of claim 1, wherein the organic solvent is selected from methyl nonafluorobutyl ether, tris (2, 2, 2-trifluoroethyl) phosphate, perfluorodecyl trichlorosilane, or isoflurane.
6. The method of claim 1, wherein the lithium salt is present at a concentration of 6.0 to 12.0M.
7. The method of claim 1, wherein the electrochemically driving is by:
and (3-5) dry batteries with 1.5V are short-circuited at two ends of the lithium sheet.
8. The method of claim 1, wherein the lithium sheet has a thickness of 45 to 200 μm.
9. The method according to claim 1, wherein the reaction time is 1-3 min.
10. The method according to claim 1, wherein the treatment of the lithium metal sheet is repeated 2 to 5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911418097.7A CN111129437A (en) | 2019-12-31 | 2019-12-31 | Method for passivating surface of lithium cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911418097.7A CN111129437A (en) | 2019-12-31 | 2019-12-31 | Method for passivating surface of lithium cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111129437A true CN111129437A (en) | 2020-05-08 |
Family
ID=70506853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911418097.7A Pending CN111129437A (en) | 2019-12-31 | 2019-12-31 | Method for passivating surface of lithium cathode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111129437A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212766A (en) * | 2021-11-04 | 2022-03-22 | 湖南金硅科技有限公司 | Lithium-supplementing modified silicon material and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080057369A1 (en) * | 2003-04-02 | 2008-03-06 | Kurtz Anthony D | Fuel cells employing nanostructures |
| CN110534706A (en) * | 2019-09-06 | 2019-12-03 | 燕山大学 | A kind of passivation of lithium powder and its preparation method and application |
| CN110556509A (en) * | 2019-08-14 | 2019-12-10 | 南京大学 | Method for performing surface protection and passivation treatment on metallic lithium cathode by using fluorine-containing organic matter, product and application |
| CN110603683A (en) * | 2017-11-30 | 2019-12-20 | 株式会社Lg化学 | Non-aqueous electrolyte for lithium secondary battery and lithium secondary battery comprising the same |
| CN110603670A (en) * | 2017-12-14 | 2019-12-20 | 株式会社Lg化学 | Method for continuously manufacturing lithium secondary battery having passivation film formed on surface of lithium metal electrode and lithium secondary battery manufactured thereby |
-
2019
- 2019-12-31 CN CN201911418097.7A patent/CN111129437A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080057369A1 (en) * | 2003-04-02 | 2008-03-06 | Kurtz Anthony D | Fuel cells employing nanostructures |
| CN110603683A (en) * | 2017-11-30 | 2019-12-20 | 株式会社Lg化学 | Non-aqueous electrolyte for lithium secondary battery and lithium secondary battery comprising the same |
| CN110603670A (en) * | 2017-12-14 | 2019-12-20 | 株式会社Lg化学 | Method for continuously manufacturing lithium secondary battery having passivation film formed on surface of lithium metal electrode and lithium secondary battery manufactured thereby |
| CN110556509A (en) * | 2019-08-14 | 2019-12-10 | 南京大学 | Method for performing surface protection and passivation treatment on metallic lithium cathode by using fluorine-containing organic matter, product and application |
| CN110534706A (en) * | 2019-09-06 | 2019-12-03 | 燕山大学 | A kind of passivation of lithium powder and its preparation method and application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212766A (en) * | 2021-11-04 | 2022-03-22 | 湖南金硅科技有限公司 | Lithium-supplementing modified silicon material and preparation method and application thereof |
| CN114212766B (en) * | 2021-11-04 | 2024-02-13 | 湖南金硅科技有限公司 | Lithium-supplementing modified silicon material and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110534706B (en) | Passivated lithium powder and preparation method and application thereof | |
| CN111073184B (en) | Gel electrolyte film for secondary battery, preparation and application thereof | |
| CN112670450A (en) | Negative pole piece for solid-state battery and preparation method and application thereof | |
| CN113937269A (en) | Three-dimensional porous copper current collector-lithium negative electrode integrated structure modified by silver particle coating and preparation method and application thereof | |
| CN112786841A (en) | Modification method of lithium metal surface and lithium metal battery | |
| CN112186153A (en) | Lithium cathode with interface nanosheet protective layer and preparation method thereof | |
| CN109860516B (en) | Preparation method of SEI film on surface of lithium battery electrode material and membrane electrode material | |
| CN100353594C (en) | Metal oxide electrode material for producing adulterant utilizing electro-deposition-heat treatment technology | |
| CN109244370B (en) | Preparation method of secondary lithium metal battery cathode steam protective film | |
| CN114792775A (en) | Polymer coating modified zinc cathode and preparation method and application thereof | |
| CN113314801B (en) | Slow-release functional diaphragm, preparation method thereof and lithium battery | |
| CN111129437A (en) | Method for passivating surface of lithium cathode | |
| CN114203975A (en) | Method for improving cycle performance of lithium metal battery | |
| CN104852084B (en) | A kind of preparation method of lithium ion battery polymer electrolyte | |
| CN112072076B (en) | Modification method for surface of negative electrode of lithium metal battery | |
| CN116315421A (en) | Preparation method of battery diaphragm with high lithium ion conductivity | |
| CN114865226B (en) | Preparation method and application of MXene-based inorganic particle/PVDF-based polymer composite diaphragm | |
| CN110911662A (en) | Lithium cathode with protective layer and preparation method and application thereof | |
| CN114262447B (en) | Two-dimensional covalent organic framework material with cation framework, preparation method and application thereof, and lithium metal battery electrode | |
| CN116230951A (en) | Modification method and application of lithium metal battery negative electrode current collector | |
| CN115588785A (en) | Wide-temperature-range aqueous zinc metal battery electrolyte and battery | |
| CN113823878B (en) | Preparation method of lithium battery diaphragm with ion transmission regulation and control function | |
| CN109326771A (en) | A kind of preparation method and ferric phosphate lithium cell of lithium anode | |
| CN115566142A (en) | Negative electrode, secondary battery, and electric device | |
| CN116979027A (en) | Polymer electrolyte-lithium boron alloy negative electrode integrated material, preparation method thereof and solid-state lithium metal battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200508 |
|
| RJ01 | Rejection of invention patent application after publication |