CN108736056A - A kind of lithium metal interface protection structure and its preparation and application - Google Patents
A kind of lithium metal interface protection structure and its preparation and application Download PDFInfo
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- CN108736056A CN108736056A CN201710262306.8A CN201710262306A CN108736056A CN 108736056 A CN108736056 A CN 108736056A CN 201710262306 A CN201710262306 A CN 201710262306A CN 108736056 A CN108736056 A CN 108736056A
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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
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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
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Abstract
The present invention relates to a kind of lithium metal interface protection structure and its preparations and application.Specifically, the invention discloses a kind of interfaces to protect structure.The invention also discloses the preparation method and application that structure is protected at the interface.Including the battery of the interface protection structure has excellent cycle performance and service life.The preparation method has the characteristics that simple for process, at low cost, raw material is easy to get.
Description
Technical field
The present invention relates to electrochemical fields, and structure and its preparation and application are protected more particularly to a kind of lithium metal interface.
Background technology
Have benefited from graphite cathode in cyclic process~variation of 10% smaller size smaller, using it as the lithium ion of negative material
Battery can obtain stable cycle performance and longer service life.However graphite cathode material lithium storage content is relatively low
(being 339mAh/g in the case of lithium insertion, be 372mAh/g in the case of lithium abjection), constantly seeks higher energy in lithium battery market
During density system, industry requirement cannot be satisfied.
As a kind of high-energy density negative material, (lithium metal theoretical capacity is 3860mAh/g to lithium metal, and with minimum
Electrode potential) application prospect in the emerging high energy-storage battery system such as lithium air, lithium sulphur is unanimously had an optimistic view of, however cycle efficieny
The problems such as lower-security is bad hampers always its further genralrlization and application in battery industry.By largely studying
It was found that in battery charging process, whether on lithium metal or other metal collector surfaces, it is heavy all to generate non-uniform lithium
Product.With lasting charging process, non-uniform lithium deposition inevitably lead to lithium metal surface enormousness expansion and
Local lithium dendrite growth.Volume expansion and dendrite problems can lead to electrode interface impedance increase, battery capacity loss.Lasting
Dendritic growth, which can pierce through electrolyte diaphragm, leads to battery short circuit so that lithium an- ode is in use always along with huge
Big security risk, this also make its be difficult to be applied to electric vehicle, accompanied electronic equipment etc. it is more demanding to safety coefficient
Working environment in.The various solutions proposed in recent years by industry, the service life and efficiency of lithium an- ode have obtained
To being obviously improved, but improves intensity and be still difficult to meet the needs of large-scale commercial.
Existing guard method is excessively single to the protective action of Li dendrite.It wherein, can be one using solid electrolyte
Determine dendrite inhibition in degree to grow, however lower ionic conductivity and poor electrode/electrolyte contact surface can all lead to electricity
Pond internal resistance increases considerably；Facilitate membranous type additive that can accelerate to be formed in electrode surface and have in addition, being added in the electrolytic solution
The passivation layer of protective effect, however the passivation layer itself does not have the mechanical attributes of dendrite inhibition growth, final electrode surface
Non-uniform dendritic growth can still occur, and the undue growth of dendrite can pierce through passivation layer so that no passivation layer covers
The lithium metal part of lid directly generates with electrolyte contacts and once again new passivation layer, so repeated passivation layer rupture and
It regenerates the lithium and electrolyte in continuous consumption system.
Described in summary, although this field existing optional lithium metal guard method at present, existing lithium an- ode
Structural stability and circulating effect it is still unsatisfactory.
Therefore, there is an urgent need in the art to develop a kind of guard method that can effectively realize lithium metal high circulation efficiency and its system
Standby technique.
Invention content
The purpose of the present invention is to provide a kind of interfaces that can efficiently protect lithium metal to protect structure and its preparation and application.
The first aspect of the present invention, provides a kind of interface protection structured forerunner material, the persursor material be as
Lower preparation：
1) mixed slurry is provided, the mixed slurry includes：Metal fluoride, carbon material, binder and solvent；
2) mixed slurry is coated on metal substrate surface, obtains the metallic substrates containing first coating；
3) the baking processing metallic substrates containing first coating, obtain the metallic substrates containing second coating, and described second
Protect structured forerunner material in coating, that is, interface.
In another preferred example, the metallic substrates are that alloyed metal (AM) base material will not occur with lithium metal.
In another preferred example, the metallic substrates are selected from the group：Copper foil, nickel foil, stainless steel foil.
In another preferred example, the metal fluoride is selected from the group：Nickel fluoride, manganous fluoride, ferric flouride, titanium fluoride, fluorine
Change copper, tin fluoride, or combinations thereof；And/or
The carbon material is selected from the group：Special close highly conductive carbon black, graphene, Ketjen black, acetylene black, carbon nanotube or its
Combination；And/or
The binder is selected from the group：Kynoar, polyimides, tertiary benzene butyl rubber, polyacrylonitrile, polyacrylic acid
Ester, sodium alginate, or combinations thereof.
In another preferred example, the solvent is selected from the group：Water, N-Methyl pyrrolidone, N,N-dimethylformamide, N,
N- dimethylacetylamides, dimethyl sulfoxide (DMSO), or combinations thereof.
In another preferred example, in the mixed slurry, the metal fluoride, the carbon material and the binder
Mass ratio is 5-12：1-3：1-5, preferably 7-10：1-2：1-3.
In another preferred example, the thickness of the first coating is 10-100 microns, preferably 20-40 microns.
In another preferred example, the treatment temperature of the baking processing is 60-160 DEG C, preferably 100-140 DEG C；And/or
Processing time of the baking processing under the treatment temperature is 1-20h, preferably 6-16h, more preferably 8-
14h。
In another preferred example, the baking processing carries out under vacuum or inert gas shielding.
In another preferred example, step is also optionally included after step 3)：Cutting step 3) products therefrom, contained
The negative material of the interface protection structured forerunner material.
The second aspect of the present invention, provides a kind of interface protection structure, and the interface protection structure is prepared as follows：
I) provide containing interface described in first aspect present invention protect the negative material of structured forerunner material, electrolyte, every
Film, lithium electrode piece；
Ii) with the negative material, the electrolyte, the diaphragm and the lithium electrode piece assembled battery；
Iii) electrochemical reduction processing step ii) gained battery, dismantling gained battery, you can removed from gained cathode
Structure is protected to the interface.
In another preferred example, the electrolyte, the diaphragm and the lithium electrode piece are not particularly limited, this can be used
The material of field routine, or adopt and be prepared with the conventional methods in the field, or be commercially available from market.
In another preferred example, the electrolyte is selected from the group：3011R (is purchased from Cathay of Zhangjagang City Huarong chemical industry green wood
Material Co., Ltd), (wherein, lithium salts is selected from the group for the electrolyte voluntarily allocated：Lithium hexafluoro phosphate, lithium perchlorate, double fluoroforms
Sulfimide lithium, double fluorine sulfimide lithiums, or combinations thereof；Solvent is selected from the group：Dimethyl carbonate, methyl ethyl carbonate, carbonic acid two
Ethyl ester, ethylene carbonate, propene carbonate, glycol dimethyl ether, 1,3- dioxolanes, or combinations thereof).
In another preferred example, the diaphragm is selected from the group：Polyethylene diagrams, polypropylene diaphragm, propylene/ethylene copolymer
Diaphragm, polyester film (PET, Polyethylene Terephthalate), cellulose membrane, polyimide film (PI), PA membrane
(PA), spandex or aramid fiber film, or combinations thereof.
In another preferred example, the thickness of the lithium electrode piece is 50-200 microns, preferably 100-150 microns.
In another preferred example, the electrochemical reduction, which is handled, refers to：By the battery discharge to 0V.
The third aspect of the present invention, provides a kind of product, and the product includes that interface described in first aspect present invention is protected
Protect structure in interface described in protection structure persursor material or second aspect of the present invention.
In another preferred example, the product is preferably battery.
The fourth aspect of the present invention, provides a kind of battery, and the battery includes that interface described in second aspect of the present invention is protected
Protection structure.
In another preferred example, the battery is lithium metal battery, preferably lithium metal secondary cell.
In another preferred example, the battery also includes positive electrode, negative material, electrolyte and diaphragm.
In another preferred example, interface protection structure described in second aspect of the present invention is adjacently positioned with the diaphragm.
In another preferred example, described in second aspect of the present invention interface protection structure be located at the negative material and it is described every
Between membrane material.
In another preferred example, the negative material is the backing material that structure is protected at the interface, it is preferable that described negative
Pole material is selected from the group：Copper foil, copper mesh, lithium foil, nickel screen, aluminium foil, aluminium net, or combinations thereof.
In another preferred example, the battery is after lithium metal deposition/Decomposition Cycle 100 weeks, coulombic efficiency >=60%,
Preferably >=70%, more preferably >=80%, preferably >=90%, most preferably >=95%.
It should be understood that within the scope of the present invention, above-mentioned each technical characteristic of the invention and have in below (eg embodiment)
It can be combined with each other between each technical characteristic of body description, to form a new or preferred technical solution.As space is limited, exist
This no longer tires out one by one states.
Description of the drawings
Fig. 1 illustrates the application method of protection structure in interface of the present invention.
Fig. 2 is that copper lithium battery C1 made from copper lithium battery 1-6 made from embodiment 1-6 and comparative example 1 is tested in the present invention
Under the conditions of recycle 100 weeks coulombic efficiency variation.
Specific implementation mode
The present inventor's in-depth study by long-term, is unexpectedly prepared a kind of interface that can efficiently protect lithium metal
Structure is protected, including the battery of interface protection structure can get excellent cycle performance and service life.The interface is protected
The preparation method of protection structure has the characteristics that simple for process, at low cost, raw material is easy to get.On this basis, inventor completes this
Invention.
Protect structure and preparation method thereof in interface
In the present invention, it should be appreciated that handling gained interface protection structure through the electrochemical reduction has lithium fluoride frame.
In the present invention, the interface protection structured forerunner material includes metal fluoride/carbon material/binder.
Typically, the metal fluoride includes (but being not limited to)：Nickel fluoride, titanium fluoride, copper fluoride, ferric flouride,
Or common metals fluoride such as manganous fluoride or combinations thereof, the material of this field routine can be selected, or prepared with conventional method, or
It is commercially available from market.
Typically, the grain diameter of the metal fluoride is 10-100 nanometers.
Typically, the carbon material includes (but being not limited to)：Special close highly conductive carbon black (Super-P), Ketjen black, second
Acetylene black, graphene, carbon nanotube, or combinations thereof.
Typically, the binder includes (but being not limited to)：Tertiary benzene butyl rubber, polyimides, Kynoar,
Polyacrylonitrile, polyacrylate, sodium alginate, or combinations thereof.
In a preferred example, the metal fluoride：Carbon material：The weight ratio of binder is 65~89%：10~
30%：1~5%.
In the present invention, the metal fluoride load capacity is 1~5 milli gram/cm.
Typically, the interface protection structure is prepared as follows：
(1) binder stirring is pre-dissolved in organic solvent and obtains binder solution, binder solution concentration is no more than matter
Measure ratio 30%；
(2) metal fluoride, carbon material and binder solution are mixed in organic solvent and obtain persursor material
Slurry；
(3) persursor material slurry is coated on collector one side, low-temperature prewarming volatile organic solvent is later again lazy
It is toasted in property atmosphere or vacuum environment；
(4) pole piece after baking is packed into and the battery discharge that electrode is lithium piece is restored to 0V, disassemble battery, it will be electric
After pole piece after electronation is stood in air environment, strippable self-supporting interface protection structure is obtained.
Typically, the organic solvent is according to binder difference, including (but being not limited to)：Water, N- crassitudes
Ketone, n,N-Dimethylformamide, n,N-dimethylacetamide, dimethyl sulfoxide (DMSO), or combinations thereof.
In another preferred example, the solvent is N-Methyl pyrrolidone.
In another preferred example, the stirring is magnetic agitation.
In another preferred example, the step (1) and/or (2) middle time stirred are 1~5 hour, it is therefore preferable to 2~3
Hour.
In another preferred example, binder solution a concentration of 5~30% in the step (1), it is therefore preferable to 10%.
In another preferred example, the low-temperature prewarming temperature is 80~140 DEG C, is more preferably 100~120 DEG C.Another
In preference, the baking time is 1~20h, is more preferably 3~15h.
In another preferred example, the baking carries out under vacuum environment or inert gas shielding.
Protection structure is mainly acted on support construction composition cathode in lithium secondary battery as described in the present invention.The branch
Support structure is selected from the group：Copper foil, copper mesh, lithium foil, nickel screen.
More specifically, in the present invention, inventor is not by other sending out in copper foil, nickel foil or stainless steel foil and with lithium metal
The metallic substrates collection liquid surface of intercrescence aurification coats the coating being made of metal fluoride/carbon material/binder, and discovery can be with
The self supporting structure with lithium fluoride frame is formed after it is restored by lithium ion electrochemical.Such structure is not only easy from metal
Substrate collector is removed, and after it is placed in lithium metal or other negative current collector surfaces, can effectively be protected during circulating battery
Shield is deposited below protection structure, the lithium metal by collector side, its being in direct contact with electrolyte is isolated, avoids side reaction
The characteristics of occurring, preventing the series of optimum electrode cycle efficiency such as the lithium metal dendritic growth and passivation and service life (guarantor
The application method of protection structure is as schematically shown in Figure 1).In 0.5 milliamps per square centimeter of current density and 1 milliampere hour/square centimeter
The coulombic efficiency and cycle longevity more than 100 weeks that battery comprising interface protection structure under operating condition can reach~98%
Life.Meanwhile the succinct actual effect of preparation method of heretofore described interface protection structure, it in high volume can disposably handle, have huge
Big application potential.
Typically, the interface protection structure is directly covered above copper current collector, is tied to being deposited on copper current collector and protection
Lithium metal between structure is protected, while characterizing coulomb of the lithium metal on protected copper current collector in deposition/decomposable process
Efficiency.Be placed in the lithium metal of diaphragm other side in this system and the lithium metal for being deposited on copper foil survey be only provided as lithium source, it is non-by
Protected object.
It should be understood that in practical applications, this protection structure can also be covered on the lithium an- ode in lithium metal battery, protect
It protects lithium metal and protects the lithium metal interface between structure, as shown in schematic diagram 1.
Using
The present invention also provides a kind of battery, the battery includes that structure is protected at the interface.
In the present invention, the battery is after lithium metal deposition/Decomposition Cycle 100 weeks, coulombic efficiency >=60%, preferably
Ground >=70%, more preferably >=80%, preferably >=90%, most preferably >=95%.
Compared with prior art, the present invention has following major advantage：
(1) in the battery comprising interface protection structure, in cyclic process, the interface protection structure can be protected effectively
Lithium metal is protected, lithium metal is made to be isolated with electrolyte in deposition process, no side reaction or only micro side reaction occur；
(2) in the battery comprising interface protection structure, the interface protection structure can effectively prevent lithium metal dendrite
Growth and passivation；
(3) include that the interface protects the battery of structure to have extremely excellent lithium an- ode cycle performance, in 0.5 milli
It can reach~98% coulombic efficiency and super under the current density of peace/square centimeter and the operating condition of 1 milliampere hour/square centimeter
Cross 100 weeks cycle life；
(4) preparation method of the interface protection structure has the characteristics that simple for process, at low cost, raw material is easy to get；
(5) the protection structure can be removed directly from metallic substrates, and be implanted into other lithium metal batteries after the completion of preparation
In lithium an- ode surface is protected, application is stronger.
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In the following examples, the experimental methods for specific conditions are not specified, usually according to conventional strip
Part or according to the normal condition proposed by manufacturer.Unless otherwise stated, otherwise percentage and number are calculated by weight.
Unless otherwise defined, all professional and scientific terms used in text and meaning known to one skilled in the art
Justice is identical.In addition, any method and material similar or impartial to described content can be applied to the method for the present invention.Wen Zhong
The preferred implement methods and materials are for illustrative purposes only.
Embodiment 1 has the copper lithium battery 1 of interface protection structure 1
A, the Kynoar (PVdF) that mass ratio is 10% is pre-dissolved in N-Methyl pyrrolidone (NMP) solvent,
It is mixed 3 hours in magnetic stirring apparatus, obtains homogeneous solution；
B, in mass ratio 7：1：2 stirring nickel fluorides, special close highly conductive carbon black (Super-P), Kynoar, in mixture
Middle addition solvent N-methyl pyrilidone (NMP) is placed in magnetic stirring apparatus and is mixed 3 hours, obtains persursor material slurry
Material；
C, by persursor material slurry be coated in copper foil surface (coating layer thickness is about 20-60 μm), in vacuum environment with
120 DEG C are toasted 12 hours；
D, the disk that pole piece after the baking in step c is cut into a diameter of 16mm protects structured forerunner as with interface
Cathode pole piece；
E, electrolyte 3011R is instilled by the amount of 70 μ L in 20 microns of thick polyethylene diagrams, and with the cathode that is obtained in d
Pole piece and CR2032 type button cell shells are packed into together to electrode metal lithium piece, are put into group in the glove box containing inert gas
Dress obtains battery.
F, the battery discharge obtained in e to 0V is restored, disassemble battery, by the cathode pole piece after electrochemical reduction in
After being stood in air environment, strippable interface protection structure 1 is obtained.
G, the interface obtained in f protection structure 1 is placed in copper foil surface, electrolyte 3011R is instilled 20 by the amount of 70 μ L
It is to be packed into CR2032 type button cell shells together to electrode with metal lithium sheet, obtaining has boundary in the thick polyethylene diagrams of micron
Protect the copper lithium battery 1 of structure 1 in face.
Embodiment 2 has the copper lithium battery 2 of interface protection structure 2
With embodiment 1, difference lies in：Metal fluoride is manganous fluoride in stepb.
Embodiment 3 has the copper lithium battery 3 of interface protection structure 3
With embodiment 1, difference lies in：Metal fluoride is ferric flouride in stepb.
Embodiment 4 has the copper lithium battery 4 of interface protection structure 4
With embodiment 1, difference lies in：Nickel fluoride in stepb：Special close highly conductive carbon black (Super-P)：Kynoar
Ratio is 8:1:1.
Embodiment 5 has the copper lithium battery 5 of interface protection structure 5
With embodiment 1, difference lies in：Carbon material is graphene in stepb.
Embodiment 6 has the copper lithium battery 6 of interface protection structure 6
With embodiment 1, difference lies in：Binder is polyimides in stepb.
Comparative example 1 does not have the copper lithium battery C1 of interface protection structure
A, electrolyte 3011R is instilled by the amount of 70 μ L in 20 microns of thick polyethylene diagrams, using copper foil as working electrode,
Metal lithium sheet is to be packed into CR2032 type button cell shells together to electrode, obtains the copper lithium battery for not having interface protection structure
C1。
Electrochemical property test
Under 0.5 milliamps per square centimeter of current density, to copper lithium battery 1-6 made from embodiment 1-6 and comparative example 1
Copper lithium battery C1 obtained carries out lithium metal deposition/Decomposition Cycle respectively.Cycling condition is weekly toward 1 milliampere of deposition on copper electrode
When/square centimeter lithium metal, then decomposed again, decomposition stopping potential be 0.5V.With coulombic efficiency, i.e. decomposition amount/heavy
Accumulated amount characterizes the lithium metal protecting effect of copper electrode side.
As a result as shown in table 1 and Fig. 2.
1 coulombic efficiency result of table
| 10th week | 50th week | 100th week | |
| Embodiment 1 | 97.55% | 97.60% | 97.65% |
| Embodiment 2 | 94.39% | 97.19% | 81.95% |
| Embodiment 3 | 95.75% | 97.25% | 68.68% |
| Embodiment 4 | 92.36% | 95.25% | 90.35% |
| Embodiment 5 | 95.90% | 97.65% | 97.15% |
| Embodiment 6 | 94.4% | 96.7% | 90.35% |
| Comparative example 1 | 55.66% | 25.22% | -- |
According to Fig. 2 and table 1：During recycling 100 weeks, the copper lithium battery 1- with interface of the present invention protection structure
6 can maintain 90% or more coulombic efficiency at first 50 weeks, the copper lithium battery for protecting structure without having interface of the present invention
C1 is only 55.66% in the 10th week coulombic efficiency, decays to 25.22% within the 50th week, and can not be recycled to 100 weeks.
All references mentioned in the present invention is incorporated herein by reference, independent just as each document
It is incorporated as with reference to such.In addition, it should also be understood that, after reading the above teachings of the present invention, those skilled in the art can
To be made various changes or modifications to the present invention, such equivalent forms equally fall within model defined by the application the appended claims
It encloses.
Claims (10)
1. structured forerunner material is protected at a kind of interface, which is characterized in that the persursor material is prepared as follows：
1) mixed slurry is provided, the mixed slurry includes：Metal fluoride, carbon material, binder and solvent；
2) mixed slurry is coated on metal substrate surface, obtains the metallic substrates containing first coating；
3) the baking processing metallic substrates containing first coating, obtain the metallic substrates containing second coating, the second coating
Protect structured forerunner material in the i.e. described interface.
2. persursor material as described in claim 1, which is characterized in that the metal fluoride is selected from the group：Nickel fluoride, fluorine
Change manganese, ferric flouride, titanium fluoride, copper fluoride, tin fluoride, or combinations thereof；And/or
The carbon material is selected from the group：Special close highly conductive carbon black, graphene, Ketjen black, acetylene black, carbon nanotube, or combinations thereof；
And/or
The binder is selected from the group：Kynoar, polyimides, tertiary benzene butyl rubber, polyacrylonitrile, polyacrylate,
Sodium alginate, or combinations thereof.
3. persursor material as described in claim 1, which is characterized in that in the mixed slurry, the metal fluoride, institute
The mass ratio for stating carbon material and the binder is 5-12：1-3：1-5.
4. persursor material as described in claim 1, which is characterized in that the treatment temperature of the baking processing is 60-160
℃；And/or
Processing time of the baking processing under the treatment temperature is 1-20h.
5. structure is protected at a kind of interface, which is characterized in that the interface protection structure is prepared as follows：
I) negative material, electrolyte, diaphragm, the lithium electrode that structured forerunner material is protected containing interface described in claim 1 are provided
Piece；
Ii) with the negative material, the electrolyte, the diaphragm and the lithium electrode piece assembled battery；
Iii) electrochemical reduction processing step ii) gained battery, dismantling gained battery, you can stripping obtains institute from gained cathode
State interface protection structure.
6. structure is protected at interface as claimed in claim 5, which is characterized in that the electrochemical reduction, which is handled, refers to：It will be described
Battery discharge is to 0V.
7. a kind of product, which is characterized in that the product includes interface protection structured forerunner material or power described in claim 1
Profit requires the 5 interface protection structures.
8. a kind of battery, which is characterized in that the battery pack protects structure containing interface described in claim 5.
9. battery as claimed in claim 8, which is characterized in that the battery also include positive electrode, negative material, electrolyte and
Diaphragm.
10. battery as claimed in claim 8, which is characterized in that the battery after lithium metal deposition/Decomposition Cycle 100 weeks,
Coulombic efficiency >=60%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686922A (en) * | 2018-12-06 | 2019-04-26 | 上海空间电源研究所 | A kind of preparation method and application of sandwich structure long-service-life metal lithium battery |
| CN109950476A (en) * | 2019-04-18 | 2019-06-28 | 电子科技大学 | A kind of lithium anode material and its preparation method and application |
| CN110071284A (en) * | 2019-03-01 | 2019-07-30 | 上海大学 | The guard method of metal lithium electrode |
| CN113299914A (en) * | 2020-02-21 | 2021-08-24 | 中国科学院宁波材料技术与工程研究所 | Fluorocarbon-containing material and preparation method and application thereof |
| CN113346045A (en) * | 2021-05-28 | 2021-09-03 | 电子科技大学 | Lithium metal anode modified by composite SEI layer and preparation method thereof |
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