CN109935836A - Current collector structure, lithium battery electric core and its lithium battery - Google Patents
Current collector structure, lithium battery electric core and its lithium battery Download PDFInfo
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- CN109935836A CN109935836A CN201711379433.2A CN201711379433A CN109935836A CN 109935836 A CN109935836 A CN 109935836A CN 201711379433 A CN201711379433 A CN 201711379433A CN 109935836 A CN109935836 A CN 109935836A
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 234
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 230
- 229910001512 metal fluoride Inorganic materials 0.000 claims abstract description 44
- 238000003475 lamination Methods 0.000 claims abstract description 11
- 239000003792 electrolyte Substances 0.000 claims description 81
- 239000000463 material Substances 0.000 claims description 59
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 41
- 229910052799 carbon Inorganic materials 0.000 claims description 37
- 239000013078 crystal Substances 0.000 claims description 34
- PNUGDRJNKILROY-UHFFFAOYSA-N [C].[Si].[Li] Chemical compound [C].[Si].[Li] PNUGDRJNKILROY-UHFFFAOYSA-N 0.000 claims description 19
- 239000002153 silicon-carbon composite material Substances 0.000 claims description 18
- 230000008021 deposition Effects 0.000 claims description 9
- ZVLDJSZFKQJMKD-UHFFFAOYSA-N [Li].[Si] Chemical compound [Li].[Si] ZVLDJSZFKQJMKD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 5
- 239000011852 carbon nanoparticle Substances 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 229940071498 combination fluoride Drugs 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 16
- 239000007787 solid Substances 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 323
- 239000011162 core material Substances 0.000 description 119
- 238000000034 method Methods 0.000 description 11
- 238000000151 deposition Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 239000007784 solid electrolyte Substances 0.000 description 7
- 239000003575 carbonaceous material Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 4
- 239000010406 cathode material Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000002203 sulfidic glass Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000001755 magnetron sputter deposition Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910010953 LiGePS Inorganic materials 0.000 description 2
- 229910012422 LiSnPS Inorganic materials 0.000 description 2
- 239000002228 NASICON Substances 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005566 electron beam evaporation Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- KWVVTSALYXIJSS-UHFFFAOYSA-L silver(ii) fluoride Chemical compound [F-].[F-].[Ag+2] KWVVTSALYXIJSS-UHFFFAOYSA-L 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- BHHYHSUAOQUXJK-UHFFFAOYSA-L zinc fluoride Chemical compound F[Zn]F BHHYHSUAOQUXJK-UHFFFAOYSA-L 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910021564 Chromium(III) fluoride Inorganic materials 0.000 description 1
- 229910021582 Cobalt(II) fluoride Inorganic materials 0.000 description 1
- 229910021594 Copper(II) fluoride Inorganic materials 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910021570 Manganese(II) fluoride Inorganic materials 0.000 description 1
- 229910021571 Manganese(III) fluoride Inorganic materials 0.000 description 1
- 229910021587 Nickel(II) fluoride Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910010348 TiF3 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- GWFAVIIMQDUCRA-UHFFFAOYSA-L copper(ii) fluoride Chemical compound [F-].[F-].[Cu+2] GWFAVIIMQDUCRA-UHFFFAOYSA-L 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- CTNMMTCXUUFYAP-UHFFFAOYSA-L difluoromanganese Chemical compound F[Mn]F CTNMMTCXUUFYAP-UHFFFAOYSA-L 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- FZGIHSNZYGFUGM-UHFFFAOYSA-L iron(ii) fluoride Chemical compound [F-].[F-].[Fe+2] FZGIHSNZYGFUGM-UHFFFAOYSA-L 0.000 description 1
- SHXXPRJOPFJRHA-UHFFFAOYSA-K iron(iii) fluoride Chemical compound F[Fe](F)F SHXXPRJOPFJRHA-UHFFFAOYSA-K 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- SRVINXWCFNHIQZ-UHFFFAOYSA-K manganese(iii) fluoride Chemical compound [F-].[F-].[F-].[Mn+3] SRVINXWCFNHIQZ-UHFFFAOYSA-K 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- DBJLJFTWODWSOF-UHFFFAOYSA-L nickel(ii) fluoride Chemical compound F[Ni]F DBJLJFTWODWSOF-UHFFFAOYSA-L 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- ANOBYBYXJXCGBS-UHFFFAOYSA-L stannous fluoride Chemical compound F[Sn]F ANOBYBYXJXCGBS-UHFFFAOYSA-L 0.000 description 1
- -1 sulphur Compound Chemical class 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- FTBATIJJKIIOTP-UHFFFAOYSA-K trifluorochromium Chemical compound F[Cr](F)F FTBATIJJKIIOTP-UHFFFAOYSA-K 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to field of lithium, specifically include current collector structure, lithium battery electric core and its lithium battery, wherein the collector includes two opposite main surfaces, metal fluoride anode layer is formed in one of main surface, using the anode structure as a lithium battery electric core,, as positive electrode, it can get lithium battery electric core and lithium battery with high volume capacity density, high-rate characteristics using with high pressure, the high metal fluoride for holding characteristic.By the way that positive and negative anodes are arranged on two faces of collector, to form the collector of positive and negative copolar, the multiple lithium battery electric core lamination preparations of high capacity can be achieved, to realize the preparation of large area solid lithium battery, it can also be directly using collector as the electrode of lithium battery, to simplify the encapsulating structure of the lithium battery.
Description
[technical field]
The present invention relates to field of lithium, in particular to a kind of current collector structure, lithium battery electric core and its lithium battery.
[background technique]
Solid lithium battery be due to its safety, cycle performance is excellent the advantages that important development side as secondary cell
To, simultaneously because lithium metal Elements Atom radius it is small, with minimum electrochemical potential, solid lithium battery compares other sodium ions
Battery has bigger market application potential.
Three central factors for influencing solid lithium battery performance are safety, specific capacity and high-rate characteristics.Existing skill
In art, lithium battery electric core material system is using graphite cathode the most mature, and theoretical capacity only has 270mAh/g, and positive material
Material is the lower material of the specific capacities such as LiFePO4, ternary material and cobalt acid lithium, and battery energy density is caused to can only achieve 250-
300Wh/kg.And the combination of currently used positive electrode and negative electrode, cannot achieve the charging of big voltage, cause current lithium battery low range
Status.It would therefore be highly desirable to provide the solution for lithium battery low range.
[summary of the invention]
To overcome the problems, such as that existing lithium battery multiplying power property is bad, the present invention provides a kind of current collector structures, lithium battery
Battery core and its lithium battery.
It is as follows that the present invention provides a technical solution to solve above-mentioned technical problem: a kind of current collector structure comprising afflux
Body, the collector include two opposite main surfaces, the anode layer of metal fluoride are formed in one of main surface, to make
For the anode structure of a lithium battery electric core, negative electrode layer is formed in another main surface, using the negative polarity node as another lithium battery electric core
Structure.
It is as follows that the present invention provides another technical solution to solve above-mentioned technical problem: a kind of lithium battery electric core comprising the
One collector, first collector include two opposite main surfaces, and metal fluoride anode is formed in one of main surface
Layer, using the anode structure as the lithium battery electric core, forms negative electrode layer in another main surface, using as another lithium battery electric core
Negative pole structure.
Preferably, the column crystal anode layer with a thickness of 10nm-100 μm；It is wrapped in the metal fluoride anode layer
Include the fluorine of the metallic element combination of any one or more of Ag, Cu, Li, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Ag, Sn or Bi
Compound.
Preferably, the lithium battery electric core includes the second collector and is formed in the second collector towards the anode layer
The negative electrode layer on surface, thickness ratio and the composition metal fluoride between the metal fluoride anode layer and the negative electrode layer
Volume and capacity ratio between anode layer and the material of the negative electrode layer is in inverse ratio.
Preferably, the anode layer includes the column crystal of metal fluoride；The negative electrode layer includes lithium silicon-carbon Compound Negative
Pole layer.
Preferably, the lithium silicon-carbon composite cathode layer includes that the silicon lithium that is formed on the negative current collector of deposition is compound
Alloy, carbon nano-particle are compounded within silicon lithium composite alloy.
Preferably, the lithium silicon-carbon composite cathode layer forms a carbon base material layer or institute towards the surface of the anode structure
It states lithium silicon-carbon composite cathode layer and forms a carbon base material layer towards the surface of second collector.
Preferably, the first electrolyte layer, first electrolyte layer are formed between the anode layer and the negative electrode layer
With a thickness of 1nm-50 μm.
Preferably, the lithium battery electric core further include be formed in first electrolyte layer towards the cathode it is laminated on
The second electrolyte layer, second electrolyte layer with a thickness of 1-3000nm.
It is as follows that the present invention provides a technical solution to solve above-mentioned technical problem: a kind of lithium battery comprising at least two
The lithium battery electric core of continuous lamination setting shares a positive and negative copolar collection between at least two lithium battery electric cores being directly superposed
Fluid, the positive and negative copolar collector include two opposite main surfaces, are forming metal fluoride just in one of main surface
Pole layer, using the anode structure as a wherein lithium battery electric core, forms negative electrode layer in another main surface, using as another lithium battery
The negative pole structure of battery core.
Compared with prior art, current collector structure provided by the present invention, lithium battery electric core and its lithium battery have as follows
The utility model has the advantages that
Current collector structure, lithium battery electric core and lithium battery provided by the present invention, wherein collector includes two opposite
Main surface forms the anode layer of metal fluoride in one of main surface, using the anode structure as a lithium battery electric core, separately
Negative electrode layer is formed in one main surface, using the negative pole structure as another lithium battery electric core.Using metal fluoride as anode layer,
Characteristic based on its high pressure and Gao Rong can be such that the volume and capacity ratio of the anode layer dramatically increases, while can also improve lithium battery
Multiplying power property.
It further,, can be real to form the collector of positive and negative copolar by the way that positive and negative anodes are arranged on two faces of collector
Existing multiple lithium battery electric core lamination preparations, to realize the preparation of large area solid lithium battery.
The integral thickness of lithium battery electric core, lithium battery can be also reduced using the collector of positive and negative copolar.Further, it utilizes
The collector of positive and negative copolar is, it can be achieved that be series connection between multiple lithium battery electric cores.When lithium battery electric core is connected in lithium battery
It, can be directly using collector as the electrode of lithium battery, other than it can simplify the encapsulating structure of the lithium battery, also when connection
Achievable while several hundred a lithium battery electric cores of connecting, so that obtaining voltage can reach kilovolt and the biggish lithium battery of capacity.
In the present invention, the lithium battery electric core include the second collector and be formed in the second collector towards it is described just
The negative electrode layer of pole layer surface, thickness ratio and the composition metal fluorine between the metal fluoride anode layer and the negative electrode layer
Volume and capacity ratio between compound anode layer and the material of the negative electrode layer is in inverse ratio.Not based on anode layer and cathode layer material
With different thickness is arranged, the utilization rate of anode layer can further improve, so that the performance of lithium battery can be improved.
In the present invention, further metal fluoride can be made into columnar crystal structure, using metal fluoride column crystal
The purpose of body structure can provide smooth diffusion and migrating channels for lithium ion during charge and discharge, column crystal is matching
High performance cathode realizes that the maximum of positive electrode utilizes, and improves the efficiency of lithium insertion and abjection.The lithium battery electric core and lithium
Battery can be further using the lithium silicon-carbon composite cathode layer directly formed in one side of the negative current collector towards anode structure.It adopts
Matched with metal fluoride column crystal positive electrode and lithium silicon-carbon composite cathode material, the utilization rate of anode layer can be improved,
And it can further obtain the preparation that high pressure height holds lithium battery.
Lithium battery electric core and lithium battery provided by the present invention further includes a carbon base material layer, the carbon-based material
Layer, which can be formed between negative electrode layer and second collector, to be formed a carbon base material layer or the carbon base material layer and can be formed in
The negative electrode layer is towards in the one side of the anode structure.The setting of the carbon base material layer can enhance electric conductivity, to improve
The stability and safety of the lithium battery electric core and lithium battery.
It is filled out between the column crystal anode layer and the negative electrode layer in lithium battery electric core and lithium battery of the present invention
Fill to form the first electrolyte layer, first electrolyte layer with a thickness of 1nm-50 μm.First electrolyte layer can coat institute
State column crystal anode layer.It can also shape on the surface of first electrolyte layer in lithium battery electric core and lithium battery of the present invention
At one second electrolyte layer.The setting of second electrolyte layer, can further improve the flatness of the electrolyte layer, thus
The negative terminal surface field distribution uniformity can be improved, while the hardness of electrolyte layer can also be increased, prevent positive and negative anodes from contacting and causing
Short circuit.
[Detailed description of the invention]
Fig. 1 is the schematic diagram of a layer structure of current collector structure provided by first embodiment of the invention.
Fig. 2 is the schematic diagram of a layer structure of lithium battery electric core provided by second embodiment of the invention.
Fig. 3 is the schematic diagram of a layer structure of the lithium battery electric core of another embodiment shown in Fig. 2.
Fig. 4 is the schematic diagram of a layer structure of the lithium battery electric core of another embodiment shown in Fig. 2.
Fig. 5 A is that the layer structure of the wherein specific embodiment of lithium battery electric core provided by third embodiment of the invention is shown
It is intended to.
Fig. 5 B is that the layer structure of an another specific embodiment of lithium battery electric core provided by third embodiment of the invention is shown
It is intended to.
Fig. 6 is the structural schematic diagram of lithium battery provided by fourth embodiment of the invention.
Fig. 7 is the structural schematic diagram of lithium battery provided by fifth embodiment of the invention.
Fig. 8 is the structural schematic diagram of lithium battery provided by sixth embodiment of the invention.
Fig. 9 is the flow diagram of the preparation method of lithium battery provided by seventh embodiment of the invention.
[specific embodiment]
In order to make the purpose of the present invention, technical solution and advantage are more clearly understood, below in conjunction with attached drawing and embodiment,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
Referring to Fig. 1, the first embodiment of the present invention provides a kind of current collector structure 100, the current collector structure 100 is wrapped
A collector 101 is included, the collector 101 includes two opposite main surfaces 109, is formed just in one of main surface 109
Pole layer 102 forms negative electrode layer 103 using the anode structure as a lithium battery electric core in another main surface 109, using as another
The negative pole structure of lithium battery electric core.
In the present invention, the anode layer 102 can be include metal fluoride, wherein metallic element include Ag, Cu, Li,
The combination of any one or more of Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Ag, Sn or Bi.Specifically, the metal fluoride
For AgCuF3、LiF、TiF3、VF3、CrF3、MnF3、MnF2、FeF3、FeF2、CoF2、NiF2、CuF2、ZnF2、AgF2、SnF2、BiF3
One of equal metal fluorides or a variety of combinations.
The negative electrode layer 103 may include but be not only restricted to: carbon negative pole material, lithium titanate, alloy type negative material, transition gold
Belong to oxide cathode material etc..As specifically, in the present invention, lithium silicon carbon material can be selected as negative electrode material.
The present invention is herein and in following all examples, for the defined below of the collector material: the collector
It may include the combination elemental gold obtained of one or more of other metals such as Cu, Al, Ni, Ag, Au, Cr, Ta, Ti, Mo
Category or metal alloy.
Referring to Fig. 2, the second embodiment of the present invention provides a kind of lithium battery electric core 10 comprising the first collector 11 and
Second collector 12, wherein first collector 11 includes two opposite main surfaces 110, in one of main surface 110
Anode layer 111 is formed, using the anode structure as the lithium battery electric core 10, negative electrode layer 112 is formed in another main surface, to make
For the negative pole structure of another lithium battery electric core 10.Second collector 12 equally also includes two opposite main surfaces 120,
In negative electrode layer 121 is formed in a main surface 120, using the negative pole structure as the lithium battery electric core 10, and described second
Anode layer 122 is formed in another main surface of collector 12, using the anode structure as another lithium battery electric core 10.
In the present invention, first collector 11 with second collector 12 with a thickness of 10nm-100 μm, specifically
Ground, the thickness of first collector 11 and second collector 12 can also for 10nm, 15nm, 20nm, 26nm, 56nm,
143nm, 350nm, 567nm, 778nm, 983nm, 1 μm, 19 μm, 31 μm, 45 μm, 50 μm, 61 μm, 76 μm, 89 μm or 100 μm.
In the present invention, in order to make the lithium battery electric core 10 have superior performance, improve anode layer 111 benefit
Further the anode layer 111 and the thickness relationship of negative electrode layer 121 can be carried out in some embodiments of the present invention with rate
It limits.Specifically, thickness relationship is related with material selected by the two between the anode layer 111 and negative electrode layer 121.
Its relationship can be expressed as follows formula (1):
ρJust×VJust=ρIt is negative×VIt is negative
ρJust×SJust×DJust=ρIt is negative×SIt is negative×DIt is negative (1)
Wherein, ρJustIt is expressed as the volume capacity density of anode layer 111, ρIt is negativeIt is expressed as the volume capacity density of negative electrode layer 121；
VJustIt is expressed as the volume of anode layer 111, VIt is negativeIt is expressed as the volume of negative electrode layer 121；
SJustIt is expressed as the area of anode layer 111, DJustIt is expressed as the thickness of anode layer 111, SIt is negativeIt is expressed as the face of negative electrode layer 121
Product, DIt is negativeIt is expressed as the thickness of negative electrode layer 121.
As shown from the above formula, in the same lithium battery in-core, the face of the anode layer 111 and the negative electrode layer 121
Product SJustWith area SIt is negativeIt is equal, therefore, the anode layer 111 and the thickness of the negative electrode layer 121 and the volume and capacity ratio of its material
Size is in inverse ratio.
In some embodiment of the invention, then the ratio between the anode layer 111 and the thickness of the negative electrode layer 121 can be
0.01-100。
In some specific embodiments of the present invention, the anode layer 111 with a thickness of 10nm-100 μm；Specifically, institute
The thickness for stating anode layer 111 may further be: can for 10nm, 15nm, 20nm, 24nm, 56nm, 143nm, 350nm, 567nm,
778nm, 983nm, 1 μm, 19 μm, 31 μm, 45 μm, 50 μm, 61 μm, 76 μm, 89 μm or 100 μm.
In some specific embodiments of the present invention, the negative electrode layer 121 with a thickness of 2nm-100 μm；Above-mentioned negative electrode layer
121 thickness can specifically: 2nm, 5nm, 8nm, 20nm, 10nm, 15nm, 20nm, 24nm, 56nm, 143nm, 350nm,
567nm, 778nm, 983nm, 1 μm, 19 μm, 31 μm, 45 μm, 50 μm, 61 μm, 76 μm, 89 μm or 100 μm.
Such as when the anode layer 111 includes AgCuF3Column crystal, and the negative electrode layer 121 includes lithium silicon-carbon composite cathode
When material, the thickness ratio between the anode layer 111 and the negative electrode layer 121 is 2:1,1.5:1,1:1 etc..
In some specific embodiments of the present embodiment, as shown in Figure 3, above-mentioned anode layer 111 may include with column
The metal fluoride of shape crystal structure, the anode layer 112 include at least one layer of column crystal.
The anode layer 111 includes the column crystal of metal fluoride, and the column crystal is in rule arrangement.Therefore, may be used
Unobstructed diffusion and migrating channels are provided during charge and discharge for lithium ion, in favor of the insertion and abjection of lithium, to change
The multiplying power property of kind lithium battery, and the anode layer 111 volume capacity density with higher can be made.
Specifically, gapless densification is arranged between the column crystal for the metal fluoride being disposed adjacent.When metal fluorine
When gap between the column crystal of compound is intended to zero, then the column crystal settable in the range of same area
Quantity is more, then can further improve the volume capacity density of the anode structure of acquisition as prepared by it.
The present invention is herein and the size of column crystal as described below refers to that the size along the anode structure thickness direction is big
It is small.The size of the column crystal is 1nm-100 μm.In some specific embodiments of the present invention, the ruler of the column crystal
It is very little be specially 1nm, 3nm, 5nm, 7nm, 10nm, 17nm, 23nm, 26nm, 46nm, 57nm, 101nm, 143nm, 350nm,
567nm, 778nm, 983nm, 1 μm, 19 μm, 31 μm, 45 μm, 50 μm, 61 μm, 76 μm, 89 μm or 100 μm.
In some specific embodiments of the present invention, the anode layer 111 and the negative electrode layer 121 can be used magnetic control and splash
It penetrates, electron beam evaporation, pulse laser deposition and the PVD techniques such as atomic layer deposition, is deposited on 11 1 surface of the first collector
It is formed.
In the present embodiment, when the negative electrode layer 121 includes lithium silicon-carbon composite cathode material, the negative electrode layer 121 can
It deposits to form the compound conjunction of silicon lithium using PVD techniques such as magnetron sputtering, electron beam evaporation, pulse laser deposition and atomic layer depositions
Carbon nano-particle is further compounded within silicon lithium composite alloy using hot-pressing technique and is prepared by gold.
Specifically, before carrying out hot pressing, carbon nano-particle can be dissolved in after forming coating slurry in lithium salt solution,
Coated on lithium-silicon composite cathode surface, then it is heated and pressurizeed with high-temperature corrosion resistance substrate, so that slurry hot pressing enters
Within lithium-silicon alloy, under the action of high temperature, pulp solution can dissipate to the greatest extent, thus the lithium silicon-carbon composite cathode layer needed for obtaining.
Further as shown in Figure 2, in first specific embodiment of the present embodiment, in the lithium battery electric core 10, it is described just
Pole layer 111 is thin film planar anode layer.The first electrolyte layer 13 is formed between the anode layer 111 and the negative electrode layer 121,
Wherein, first electrolyte layer 13 with a thickness of 1nm-50 μm.Specifically, the thickness of first electrolyte layer can for 1nm,
3nm、5nm、7nm、10nm、15nm、26nm、31nm、46nm、57nm、101nm、147nm、250nm、356nm、567nm、
778nm, 983nm, 1 μm, 19 μm, 31 μm, 45 μm or 50 μm.
Further as shown in Figure 3, in second specific embodiment of the present embodiment, in the lithium battery electric core 10
In, the anode layer 111 includes the column crystal of metal fluoride, the regular arrangement of column crystal.In the anode layer 111
The first electrolyte layer 13 for coating the column crystal surface is formed between the negative electrode layer 121.
With in the prior art, from directly between the positive and negative pole material of lithium battery fill electrolyte it is different.In this reality
It applies in mode, the anode layer 11 uses columnar grain, and with large surface area, therefore forming the first electrolyte layer 13 can be lithium
More reaction interfaces are provided between the electrolyte in battery and anode layer 111, therefore, are conducive to the complete of battery charge and discharge process
Full response.Further, when 13 thickness of the first electrolyte layer is larger, the surface of first electrolyte layer 13 is uniform, from
And it can guarantee the surface field of negative electrode layer 121 and be also uniformly distributed.
Please continue to refer to Fig. 4, in the third specific embodiment of the present embodiment, with above-mentioned first specific embodiment
Difference be: then further include being formed in the lithium battery electric core 10 when 13 surface of the first electrolyte layer is uneven
The second electrolyte layer 14 on first electrolyte layer 13, second electrolyte layer 14 with a thickness of 1-3000nm.
Specifically, second electrolyte layer 14 with a thickness of 1nm, 3nm, 5nm, 7nm, 10nm, 17nm, 23nm, 26nm, 46nm,
57nm, 101nm, 143nm, 350nm, 567nm, 778nm, 983nm, 1000nm, 1500nm, 2100nm, 2189nm or 3000nm.
In the present invention, the setting of second electrolyte layer 14 is to fill up 13 thickness of the first electrolyte layer point
The non-uniform part of cloth can also further increase electrolyte layer so that the surface field of the negative electrode layer 121 be helped to be uniformly distributed
Hardness, prevent positive and negative anodes contact cause short circuit.
In the present invention, the material of first electrolyte layer 13 and the second electrolyte layer 14 includes calcium titanium-type solid state electrolysis
Matter, NASICON type solid electrolyte, Garnet-type solid electrolyte, LiGePS type sulfide solid electrolyte, LiSiPS type sulphur
The combination of compound solid electrolyte or LiSnPS type sulfide solid electrolyte one or more.
Please continue to refer to Fig. 5 A and Fig. 5 B, the third embodiment of the present invention provides a kind of lithium battery electric core 20, the present embodiment
Difference with above-mentioned second embodiment is: the lithium battery electric core 20 further includes a carbon base material layer 29.The carbon-based material
Layer 29 is specially graphite flake, carbon nanotube, graphene film layer, football alkene film layer etc., is only used as example herein, not as
Restriction of the invention.
The effect of the carbon base material layer 29 is to improve the field distribution of negative terminal surface, enhances electric conductivity, and it is negative to facilitate lithium
The insertion or abjection of pole and avoidable cathode of lithium form Li dendrite.
It as shown in Figure 5 A, in some embodiment of the invention, can be in the negative electrode layer 221 towards the first electrolyte layer 23
Surface form the carbon base material layer 29.
As shown in Figure 5 B, in other some embodiments of the invention, the carbon base material layer 29 may be provided at described
Between negative electrode layer 221 and the second collector 22.
In some specific embodiments of the present invention, the carbon base material layer 29 is to be formed in negative electrode layer by heat pressing process
221 surface towards the first electrolyte layer 23 or towards second collector 22, therefore, the carbon base material layer 29 can be in institutes
The gradient carbon material distribution of certain depth is realized in the inside for stating negative electrode layer 221, and is formed wrap to negative electrode layer 221 to a certain extent
It covers and supports, enhance the intensity of negative electrode layer 221, avoid the structural breakdown of negative electrode layer 221.
In some specific embodiments of the present invention, the carbon base material layer 29 can also be by way of coating described negative
The carbon substrate of thickness required for pole layer 221 is formed on the surface towards the first electrolyte layer 23 or towards second collector 22
The bed of material 29.
Referring to Fig. 6, fourth embodiment of the invention provides a lithium battery 30, the lithium battery 30 may include two continuous folded
Layer setting the first lithium battery electric core 301 and the second lithium battery electric core 302, two lithium battery electric cores 10 being directly superposed or
A positive and negative copolar collector 31 is shared between lithium battery electric core 20, which includes two opposite main surfaces
310, anode layer 311 is formed in one of main surface 310, using the anode structure as the first lithium battery electric core 301, Ling Yizhu
Negative electrode layer 312 is formed on surface 310, using the negative pole structure as the second lithium battery electric core 302.
Continue as shown in Figure 6, further includes negative current collector 32 in first lithium battery electric core 301, described second
Lithium battery electric core 302 includes plus plate current-collecting body 35.Wherein, cathode is formed with towards 311 side of anode layer on negative current collector 32
Layer 321, the plus plate current-collecting body 35 are equipped with anode layer 351 towards the surface of the positive and negative copolar collector 31, wherein related negative
Pole layer 321 and the definitions relevant of anode layer 351 are as shown in above-mentioned second embodiment and 3rd embodiment, and details are not described herein.
It further include being arranged in column in some specific embodiments of the present embodiment, in first lithium battery electric core 301
The first electrolyte layer 33 of formation is filled between shape crystal anode layer 311 and negative electrode layer 321 and is formed in the first electrolyte layer
The second electrolyte layer 34 on 33 surfaces towards the negative electrode layer 312.
Second lithium battery electric core 302 further includes the first electricity that formation is filled between anode layer 351 and negative electrode layer 312
Solve matter layer 33, and the second electrolyte layer 34 being formed on surface of first electrolyte layer 33 towards the negative electrode layer 321, institute
State negative electrode layer 312 towards the surface of second electrolyte layer 34 can also further comprise a carbon base material layer 39.
In other embodiment of the present invention, first lithium battery electric core 301 and second lithium battery electric core 302 can
For lithium battery electric core 10 any in above-mentioned second embodiment or 3rd embodiment or lithium battery electric core 20, specific layer structure can
Adjust according to actual battery performance requirement, it is above-mentioned only as an example, it is not as the limitation of the invention.
In some embodiments of the invention other, when may also include more than two lithium batteries in the lithium battery 30
Core 10, at least partly lithium battery electric core 10 are arranged to form an entirety by continuous lamination, are arranged in continuous lamination setting
Between lithium battery electric core 10 share collector, and the collector that the lithium battery electric core 10 at both ends is arranged in only plays plus plate current-collecting body
Or the effect of negative current collector.
Referring specifically to Fig. 7, the fifth embodiment of the present invention provides a lithium battery 40, and the lithium battery 40 includes multiple lithiums
The setting of the continuous lamination of battery battery core 10.The lithium battery 40 can be made by way of being successively superimposed, specific lithium battery electric core
10 overlapping quantity is unrestricted, and overlapping quantity can be tens, several hundred etc..
The lithium battery electric core 10 includes the first collector 41 of overlapping setting, anode layer 44, solid-state electrolyte layer 43, bears
Pole layer 45 and the second collector 42.The lithium battery electric core 10 being disposed adjacent is by sharing a plus plate current-collecting body 41 or negative pole currect collecting
Body 42 is superimposed together.
As shown in Figure 7, the second collector 42 is shared at the superposition for two lithium battery electric cores 10 being disposed adjacent, that is, the
Two collectors 42 are positive and negative copolar collector.As shown in Figure 7,42 two sides of the second collector are arranged in is respectively anode layer 44
And negative electrode layer 45.It as shown in Figure 7, can be series connection between multiple lithium battery electric cores 40.When lithium battery electric core in lithium battery
It, can be directly using collector as the electrode of lithium battery, to simplify the encapsulating structure of the lithium battery when series connection.
Referring to Fig. 8, providing a lithium battery 50, in the present embodiment, the lithium battery in the sixth embodiment of the present invention
In 50 include 5 lithium battery electric cores, respectively successively lamination setting the first lithium battery electric core 501, the second lithium battery electric core
502, third lithium battery electric core 503, the 4th lithium battery electric core 504 and the 5th lithium battery electric core 505.As shown in Figure 8, with above-mentioned
Multiple lithium battery electric cores may each comprise: the first collector 51, anode layer 54, solid-state electrolyte layer 53, negative electrode layer 55 and the second collection
Fluid 52.
As shown in Figure 8, the second collector 52 is shared between the first lithium battery electric core 501 and the second lithium battery electric core 502,
Negative electrode layer 55 is respectively provided in two opposite main surfaces of second collector 52, it is seen then that the first lithium battery electric core 501 and
It can be to be connected in parallel between two lithium battery electric cores 502.
Between the second lithium battery electric core 502 and third lithium battery 503, the second collector 52 is equally also shared, and in institute
It states and anode layer 54 and negative electrode layer 55 is respectively set in two opposite main surfaces of the second collector 52, it is seen then that the second lithium battery
It can be series connection between battery core 502 and third lithium battery electric core 503.
Further, the first of the second collector 532 of third lithium battery electric core 503 and the 4th lithium battery electric core 504
The overlapping setting of collector 541, and the first collector 532 and the second collector 541 are expressed as the third lithium battery electric core
503 and the 4th lithium battery electric core 504 plus plate current-collecting body or negative current collector.As it can be seen that the third lithium battery electric core 503
With the 4th lithium battery electric core 504 parallel connectivity can be formed by external circuitry.
In the present embodiment, above-mentioned anode layer 54 is opposite with negative electrode layer 55, the first collector 51 and the second collector 52
Position is adjustable.
It is only example shown in Fig. 8, in actual lithium battery 50, specific connection type can be according to practical lithium battery
Performance requirement adjusts, not as the limitation of the invention herein.
Please continue to refer to Fig. 9, the seventh embodiment of the present invention provides the preparation method S10 of a lithium battery, one of tool
Body embodiment comprises the following steps that
Step S11 provides one first collector, and metal fluoride anode is formed on the wherein one side of the first collector
Layer；
Step S12 forms the first electrolyte by cladding on surface of the metal fluoride anode layer far from the first collector
Layer；
Step S13 forms the second electrolyte layer on the surface of first electrolyte layer；
Step S14 forms carbon base material layer far from the surface of first electrolyte layer in the second electrolyte layer；
Step S15 forms negative electrode layer far from the surface of second electrolyte layer in the carbon base material layer；
Step S16 forms the second collector far from the surface of the carbon base material layer in the negative electrode layer.
So far, above-mentioned steps S11 completes the preparation of single lithium battery electric core to step S16.
In the other some embodiments of the present embodiment, above-mentioned steps S14- step S16 can are as follows:
Step S14b: negative electrode layer is formed far from the surface of first electrolyte layer in the second electrolyte layer；
Step S15b forms carbon base material layer far from the surface of second electrolyte layer in the negative electrode layer；
Step S16b forms the second collector far from the surface of the carbon base material layer in the carbon base material layer.
In order to continue to obtain the lithium battery of multiple lithium battery electric core superpositions, in some specific embodiments of the present embodiment
In, it may also include following step after above-mentioned steps S16 or step S16b:
Step S17a, deposition forms another lithium battery electric core in the second collector one side opposite with negative electrode layer is equipped with
Anode layer.
Step S18a, repeat the above steps S12- step S16 or step S12- step S16b, until included in lithium battery
Lithium battery electric core quantity reach pre-provisioning request.
Step S19a is packaged multiple lithium battery electric cores of continuous lamination setting, to obtain required lithium battery.
In other specific embodiments of the present embodiment, it may also include following step after above-mentioned steps S16:
Step S17b is equipped with the cathode that another lithium battery electric core is formed in the opposite one side of anode layer in the first collector
Layer；
Step P18b forms carbon base material layer on the negative electrode layer；
Step P19b sequentially forms the second electrolyte layer, first in one side of the carbon base material layer far from the negative electrode layer
Electrolyte layer；
Step P20b sequentially forms anode layer, the second collector far from the surface of the negative electrode layer in the first electrolyte layer；
Step S21b deposits the negative of another lithium battery electric core on the opposite side that second collector is equipped with anode layer
Pole layer.
Step P22b, repeat the above steps P18b- step P21b, until lithium battery electric core quantity included in lithium battery
Reach pre-provisioning request.
Step S23b is packaged multiple lithium battery electric cores of continuous lamination setting, to obtain required lithium battery.
Specifically, the first collector, the second collector, anode layer, negative electrode layer, carbon-based material are directed in related above-mentioned steps
Layer, the first electrolyte layer or the second electrolyte layer thickness, material are selected as described in above-mentioned second embodiment, 3rd embodiment,
Details are not described herein.
Particularly, in the preparation method S10 of above-mentioned lithium battery, the shape on the first collector and/or the second collector
Before anode layer or negative electrode layer, it is required to carry out planarizing process to the upper surface of the first collector and/or the second collector,
To guarantee that collection liquid surface is smooth, does not have oxide surface layer.Wherein, CMP process can be used in planarizing process,
One abrasive material adds polishing machine to carry out local polishing and grinding.
It should be strongly noted that preparing the electricity of solid-state used in first electrolyte layer and second electrolyte layer
Solving matter includes Ca-Ti ore type solid electrolyte, NASICON type solid electrolyte, Garnet-type solid electrolyte, LiGePS type sulphur
Compound solid electrolyte, LiSiPS type sulfide solid electrolyte or LiSnPS type sulfide solid electrolyte are one or more of
Combination.
In some specific embodiments of the present invention, in above-mentioned steps S11, metal fluoride is formed on collector
Column crystal anode layer can be prepared using the method for magnetron sputtering glancing incidence:
(1) substrate is placed in magnetron sputtering cavity, the angle that vertical substrate direction and vertical target direction is arranged is greater than
45 °, substrate water cooling keeps room temperature；
(2) 10 are evacuated to-5Pa, is passed through argon gas, and adjusting cavity body running air pressure to 2Pa starts to deposit iron phosphate lithium positive pole material
Material；
(3) substrate rotation simultaneously, deposition formed the column crystal of 2 micron metal fluorides after 50 minutes.
The above-mentioned column crystal anode layer preparation method for metal fluoride is only as an example, not as limit of the invention
It is fixed.
The preparation method P60 that a kind of lithium battery is further provided in eighth embodiment of the invention, it is real with the above-mentioned 7th
The difference for applying example is: its elder generation is respectively formed anode layer and negative electrode layer in the upper and lower surface of a current collector structure.The negative electrode layer
And the anode layer can be prepared or be sequentially prepared simultaneously.
The preparation method P60 of the lithium battery specifically includes following step:
Step P11 provides one first collector, the deposited metal fluoride anode on the wherein one side of the first collector
Layer, in the another side lithium deposition silicon-carbon composite cathode of collector；
After step P11, it may include be subdivided into the following two kinds mode:
The first is in the one side for being deposited with metal fluoride anode layer as substrate layer, and is continuously formed on it required
Functional layer.
Step P12a successively forms the first electrolyte layer, the second electrolyte layer on the metal fluoride anode layer；
Step P13a forms carbon base material layer in one side of second electrolyte layer far from the anode layer；
Step P14a forms negative electrode layer on face of the carbon base material layer far from second electrolyte layer.
Step P15a forms the second collector on face of the negative electrode layer far from the carbon base material layer.
Second is in the one side for being deposited with lithium silicon-carbon composite cathode layer as substrate layer, and is continuously formed on it required
Functional layer.
Step P12b forms carbon base material layer on the lithium silicon-carbon composite cathode layer；
Step P13b sequentially forms the second electrolyte layer, first in one side of the carbon base material layer far from the negative electrode layer
Electrolyte layer；
Step P14b sequentially forms anode layer, the second collector far from the surface of the negative electrode layer in the first electrolyte layer；
After above-mentioned steps P11, the face layer by layer deposition required function layer for being deposited with metal fluoride anode layer or
The sequencing for being deposited with a face layer by layer deposition required function layer of metal fluoride anode layer is unrestricted, can successively carry out,
It can also carry out simultaneously.
Further, above-mentioned steps P12a- step P15 and step P12b- step P14b may be repeated, so that complete institute
It needs the lithium battery of lithium battery electric core quantity and stops.
In this embodiment, the carbon base material layer also may be formed at the lithium silicon-carbon composite cathode layer far from second electricity
On the one side for solving matter layer, specific position can adjust according to actual demand, not as the limitation of the invention herein.
Specifically, the first collector, the second collector, anode layer, negative electrode layer, carbon-based material are directed in related above-mentioned steps
Layer, the first electrolyte layer or the second electrolyte layer thickness, material are selected as described in above-mentioned second embodiment, 3rd embodiment,
Details are not described herein.
Compared with prior art, current collector structure provided by the present invention, lithium battery electric core, lithium battery and its preparation side
Method, have it is following the utility model has the advantages that
Current collector structure, lithium battery electric core and lithium battery provided by the present invention, wherein collector includes two opposite
Main surface forms the anode layer of metal fluoride in one of main surface, using the anode structure as a lithium battery electric core, separately
Negative electrode layer is formed in one main surface, using the negative pole structure as another lithium battery electric core.Using metal fluoride as anode layer,
Characteristic based on its high pressure and Gao Rong can be such that the volume and capacity ratio of the positive layer material dramatically increases, while can also improve lithium
Battery multiplying power property.
It further,, can be real to form the collector of positive and negative copolar by the way that positive and negative anodes are arranged on two faces of collector
Existing multiple lithium battery electric core lamination preparations, to realize the preparation of large area solid lithium battery.
The integral thickness of lithium battery electric core, lithium battery can be also reduced using the collector of positive and negative copolar.Further, it utilizes
The collector of positive and negative copolar is, it can be achieved that be series connection between multiple lithium battery electric cores.When lithium battery electric core is connected in lithium battery
It, can be directly using collector as the electrode of lithium battery, other than it can simplify the encapsulating structure of the lithium battery, also when connection
Achievable while several hundred a lithium battery electric cores of connecting, so that obtaining voltage can reach kilovolt and the biggish lithium battery of capacity.
In the present invention, the lithium battery electric core include the second collector and be formed in the second collector towards it is described just
The negative electrode layer of pole layer surface, thickness ratio and the composition metal fluorine between the metal fluoride anode layer and the negative electrode layer
Volume and capacity ratio between compound anode layer and the material of the negative electrode layer is in inverse ratio.Not based on anode layer and cathode layer material
With different thickness is arranged, the utilization rate of anode layer can further improve, so that the performance of lithium battery can be improved.
In the present invention, further metal pentafluoride can be fabricated to columnar crystal structure, using metal fluoride column crystal
The purpose of body structure can provide smooth diffusion and migrating channels for lithium ion during charge and discharge, column crystal is matching
High performance cathode realizes that the maximum of positive electrode utilizes, and improves the efficiency of lithium insertion and abjection.The lithium battery electric core and lithium
Battery can be further using the lithium silicon-carbon composite cathode layer directly formed in one side of the negative current collector towards anode structure.It adopts
Matched with metal fluoride column crystal positive electrode and lithium silicon-carbon composite cathode material, the utilization rate of anode layer can be improved,
And it can further obtain the preparation that high pressure height holds lithium battery.
Lithium battery electric core and lithium battery provided by the present invention further include a carbon base material layer, the carbon base material layer
It can be formed between negative electrode layer and second collector and form a carbon base material layer or the carbon base material layer and can be formed in institute
Negative electrode layer is stated towards in the one side of the anode structure.The setting of the carbon base material layer can enhance electric conductivity, to improve institute
State the stability and safety of lithium battery electric core and lithium battery.
It is filled out between the column crystal anode layer and the negative electrode layer in lithium battery electric core and lithium battery of the present invention
Fill to form the first electrolyte layer, first electrolyte layer with a thickness of 1nm-50 μm.First electrolyte layer can coat institute
State column crystal anode layer.It can also shape on the surface of first electrolyte layer in lithium battery electric core and lithium battery of the present invention
At one second electrolyte layer.The setting of second electrolyte layer, can further improve the flatness of the electrolyte layer, thus
The negative terminal surface field distribution uniformity can be improved, while the hardness of electrolyte layer can also be increased, prevent positive and negative anodes from contacting and causing
Short circuit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in original of the invention
Made any modification within then, equivalent replacement and improvement etc. should all be comprising within protection scope of the present invention.
Claims (10)
1. a kind of current collector structure, it is characterised in that: including collector, the collector includes two opposite main surfaces,
In the anode layer of metal fluoride is formed in a main surface, using the anode structure as a lithium battery electric core, another main surface
Upper formation negative electrode layer, using the negative pole structure as another lithium battery electric core.
2. a kind of lithium battery electric core, it is characterised in that: it includes the first collector, which includes two opposite masters
Surface forms metal fluoride anode layer in one of main surface, using the anode structure as the lithium battery electric core, Ling Yizhu
Negative electrode layer is formed on surface, using the negative pole structure as another lithium battery electric core.
3. lithium battery electric core as stated in claim 2, it is characterised in that: the column crystal anode layer with a thickness of 10nm-
100μm；It include Ag, Cu, Li, Ti, V, Cr, Mn, F e, C o, Ni, Zn, Ag, S n or B i in the metal fluoride anode layer
Any one or more of metallic element combination fluoride.
4. lithium battery electric core as stated in claim 2, it is characterised in that: the lithium battery electric core include the second collector and
Be formed in negative electrode layer of second collector towards the positive layer surface, the metal fluoride anode layer and the negative electrode layer it
Between thickness than the volume and capacity ratio formed between the metal fluoride anode layer and the material of the negative electrode layer be in inverse ratio.
5. lithium battery electric core as claimed in claim 4, it is characterised in that: the anode layer includes the column crystal of metal fluoride
Body；The negative electrode layer includes lithium silicon-carbon composite cathode layer.
6. lithium battery electric core as claimed in claim 5, it is characterised in that: the lithium silicon-carbon composite cathode layer includes that deposition is formed
Silicon lithium composite alloy on the negative current collector, carbon nano-particle are compounded within silicon lithium composite alloy.
7. lithium battery electric core as claimed in claim 5, it is characterised in that: the lithium silicon-carbon composite cathode layer is towards the anode
The surface of structure forms a carbon base material layer or the surface of the lithium silicon-carbon composite cathode layer towards second collector is formed
One carbon base material layer.
8. lithium battery electric core as claimed in claim 4, it is characterised in that: formed between the anode layer and the negative electrode layer
First electrolyte layer, first electrolyte layer with a thickness of 1nm-50 μm.
9. lithium battery electric core as claimed in claim 8, it is characterised in that: the lithium battery electric core further includes being formed in described
One electrolyte layer towards the cathode it is laminated on the second electrolyte layer, second electrolyte layer with a thickness of 1-
3000nm。
10. a kind of lithium battery, it is characterised in that: it includes the lithium battery electric core of at least two continuous lamination settings, is directly superimposed
A positive and negative copolar collector is shared between at least two lithium battery electric cores being arranged, which includes two opposite
Main surface, the anode layer of metal fluoride is formed in one of main surface, using the anode as a wherein lithium battery electric core
Structure forms negative electrode layer in another main surface, using the negative pole structure as another lithium battery electric core.
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