CN109935888A - 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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- CN109935888A CN109935888A CN201711371111.3A CN201711371111A CN109935888A CN 109935888 A CN109935888 A CN 109935888A CN 201711371111 A CN201711371111 A CN 201711371111A CN 109935888 A CN109935888 A CN 109935888A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 223
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 223
- 239000013078 crystal Substances 0.000 claims abstract description 63
- 238000003475 lamination Methods 0.000 claims abstract description 10
- 239000003792 electrolyte Substances 0.000 claims description 80
- 239000000463 material Substances 0.000 claims description 43
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 36
- 229910052799 carbon Inorganic materials 0.000 claims description 32
- PNUGDRJNKILROY-UHFFFAOYSA-N [C].[Si].[Li] Chemical compound [C].[Si].[Li] PNUGDRJNKILROY-UHFFFAOYSA-N 0.000 claims description 29
- 239000002153 silicon-carbon composite material Substances 0.000 claims description 28
- 230000008021 deposition Effects 0.000 claims description 12
- ZVLDJSZFKQJMKD-UHFFFAOYSA-N [Li].[Si] Chemical compound [Li].[Si] ZVLDJSZFKQJMKD-UHFFFAOYSA-N 0.000 claims description 9
- 229910000733 Li alloy Inorganic materials 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 239000001989 lithium alloy Substances 0.000 claims description 5
- 239000011852 carbon nanoparticle Substances 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum 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
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910021450 lithium metal oxide Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 14
- 239000007787 solid Substances 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 274
- 239000011162 core material Substances 0.000 description 114
- 238000000034 method Methods 0.000 description 13
- 238000000151 deposition Methods 0.000 description 11
- 239000007784 solid electrolyte Substances 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000003575 carbonaceous material Substances 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 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
- 210000001787 dendrite Anatomy 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 238000001755 magnetron sputter deposition Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910052493 LiFePO4 Inorganic materials 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
- 239000002253 acid Substances 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 241000219991 Lythraceae Species 0.000 description 1
- 229910015427 Mo2O3 Inorganic materials 0.000 description 1
- 235000014360 Punica granatum Nutrition 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
- 239000005864 Sulphur Substances 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation 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
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 239000007788 liquid Substances 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
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 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
- 238000003825 pressing Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000004073 vulcanization Methods 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
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, column crystal anode layer is formed in one of main surface, using the anode structure as a lithium battery electric core.Lithium battery electric core and its lithium battery provided by the present invention can be realized to be connected in series or in parallel between multiple lithium battery electric cores.By the way that positive and negative anodes are arranged on two faces of collector, to form the collector of positive and negative copolar, it can be achieved that prepared by multiple lithium battery electric core laminations, to realize the large scale preparation and popularization of inexpensive 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.
Lithium battery electric core material system at present, energy density can only achieve 250-300Wh/kg.Its essential problem is battery
Electrode material limitation, specifically negative electrode material use graphite or C-Si cathode, anode using LiFePO4, ternary material and
Cobalt acid lithium causes the above results.
The existing uniformity based on the solid state lithium battery of the methods of solid-phase sintering due to not can guarantee the preparation of large area material,
The generation of Li dendrite can not be solved at all, the reason is that not can guarantee the electric fields uniform distribution of electrode surface, be only used for preparing
Small area battery sample.The prior art is unable to satisfy the preparation demand of large area solid lithium battery.
The above problem limits the large scale preparation and popularization of inexpensive solid lithium battery.
[summary of the invention]
To overcome the problems, such as that the existing large scale preparation and popularization that cannot achieve inexpensive solid lithium battery, the present invention mention
A kind of current collector structure, lithium battery electric core and its lithium battery are supplied.
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, and column crystal anode layer is formed in one of main surface, using as one
The anode structure of lithium battery electric core forms negative electrode layer in another main surface, using the negative pole structure as another lithium battery electric core.
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, form column crystal anode layer in one of main surface,
Using the anode structure as the lithium battery electric core, negative electrode layer is formed in another main surface, using bearing as another lithium battery electric core
Pole structure.
Preferably, the column crystal anode layer with a thickness of 10nm-100 μm；The column crystal anode layer include V,
In Mo, Mn, Ni, Fe, Co, Cr, Ti or Bi metallic element the metal oxide of one or more combination and contain lithium metal oxide.
Preferably, the lithium battery electric core includes the second collector and the cathode for being formed in one surface of the second collector
Layer, which includes lithium silicon-carbon composite cathode layer, and the negative electrode layer is towards the column crystal anode layer.
Preferably, the lithium silicon-carbon composite cathode layer includes silicon-lithium conjunction that deposition is formed on the negative current collector
Gold, carbon nano-particle are compounded within silicon-lithium 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, filling is formed described in cladding between the column crystal anode layer and the lithium silicon-carbon composite cathode layer
First electrolyte layer of column crystal, first electrolyte layer with a thickness of 1nm-50 μm.
Preferably, the lithium battery electric core includes being formed in the one side of first electrolyte layer towards the negative electrode layer
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 plate include two opposite main surfaces, form column crystal anode layer in one of main surface,
Using the anode structure as a wherein lithium battery electric core, negative electrode layer is formed in another main surface, using as another lithium battery electric core
Negative pole structure.
Preferably, sharing between two lithium battery electric cores of a positive and negative copolar collector is to be connected in series or in parallel.
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 column crystal anode layer in one of main surface, using the anode structure as a lithium battery electric core, Ling Yizhu
Negative electrode layer is formed on surface, using the negative pole structure as another lithium battery electric core.By being arranged just on two faces of collector
Cathode, to form the collector of positive and negative copolar, it can be achieved that prepared by multiple lithium battery electric core laminations, to realize that large area is all solid state
The preparation of 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, to simplify the encapsulating structure of the lithium battery when connection.
In addition, in the present invention using the positive electrode with columnar crystal structure as anode layer, so that it is formed
Complete column crystal smooth diffusion and migrating channels, column crystal can be provided during charge and discharge for lithium ion
Purpose is the high performance negative electrode material of matching to improve the efficiency of anode material of lithium insertion and abjection.
In the present invention, the lithium battery electric core and lithium battery can be used further in negative current collector towards anode structure
One side on the lithium silicon-carbon composite cathode layer that is formed.The energy that can further improve lithium battery using lithium silicon-carbon composite cathode layer is close
Degree, to obtain high-performance lithium battery battery core and its lithium battery.
It further include a carbon base material layer, the carbon-based material in lithium battery electric core and lithium battery provided by the present invention
Layer, which can be formed between lithium silicon-carbon composite cathode layer and second collector, forms a carbon base material layer or the carbon-based material
Layer can be formed in the lithium silicon-carbon composite cathode layer 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.
In the column crystal anode layer and the lithium silicon-carbon Compound Negative in lithium battery electric core and lithium battery of the present invention
Pole layer between filling formed the first electrolyte layer, first electrolyte layer with a thickness of 1nm-50 μm.First electrolyte
Layer can coat the column crystal anode layer, therefore have large surface area, therefore forming the first electrolyte layer can be in lithium battery
Electrolyte and anode layer between more reaction interfaces are provided, be conducive to the complete reaction of battery charge and discharge process.
One second can be also formed on the surface of first electrolyte layer in lithium battery electric core and lithium battery of the present invention
Electrolyte layer can further improve the flatness and the negative terminal surface field distribution uniformity of first electrolyte layer, while
The hardness that can increase by the first electrolyte layer prevents 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 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. 4 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. 5 is the structural schematic diagram of lithium battery provided by fourth embodiment of the invention.
Fig. 6 is the structural schematic diagram of lithium battery provided by fifth embodiment of the invention.
Fig. 7 is the structural schematic diagram of lithium battery provided by sixth embodiment of the invention.
Fig. 8 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, forms column in one of main surface 109
Shape crystal anode layer 102 forms negative electrode layer 103 using the anode structure as a lithium battery electric core in another main surface 109, with
Negative pole structure as another lithium battery electric core.
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, 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, above-mentioned anode layer 111 may include column crystal, the anode layer 111
With a thickness of 10nm-100 μm；Specifically, the thickness of the anode layer 111 may further be: 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
100μm。
The thickness of above-mentioned negative electrode layer 111 can be 10nm-100 μm, and specifically, the thickness of the negative electrode layer 111 can be further
Are as follows: 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 the present invention, the material of the column crystal may also include that including V, Mo, Mn, Ni, Fe, Co, Cr, Ti or Bi
It waits the metal oxide of one or more combination in metallic elements and contains lithium metal oxide.The anode layer 111 includes at least
One layer of column crystal.Specifically, column crystal can be V2O5Column crystal, V6O13Column crystal, MnO2Column crystal, Mo2O3Column
Shape crystal or Co1.5V0.5O3Column crystal etc..
Specifically, in other specific embodiments of the invention, the anode layer 111 may include LiFePO4, cobalt acid
The column crystal of lithium or tertiary cathode material etc..
In the anode layer 111, the column crystal is in rule arrangement, can be mistake of the lithium ion in charge and discharge therefore
Unobstructed diffusion and migrating channels are provided in journey, in favor of the insertion and abjection of lithium, so as to improve the multiplying power property of lithium battery, and
It can make the anode layer 111 can capacity density with higher.
Specifically, gapless densification is arranged between the column crystal being disposed adjacent.It can in the range of same area
The quantity for the column crystal being arranged is more, then the capacity that can further improve the anode structure of acquisition as prepared by it is close
Degree.
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.
As shown in Figure 3, in some specific embodiments of the present invention, the column crystal anode layer 111 uses magnetic control
Sputtering, electron beam evaporation, pulse laser deposition and the PVD techniques such as atomic layer deposition are in the first collector 11 wherein main surface
Upper deposition formation.
Similarly, the column to form another lithium battery electric core 10 can also be deposited in the same way on the second collector 12
The anode layer 122 of shape crystal.
In some specific embodiments of the present invention, above-mentioned negative electrode layer 112 can further comprise lithium silicon-carbon composite cathode.With
The lithium silicon-carbon composite cathode material be the negative electrode layer 112 when, the negative electrode layer 112 with a thickness of 2nm-20 μm, specifically,
The thickness of institute's lithium silicon-carbon composite cathode layer may further be: 2nm, 4nm, 7nm, 10nm, 20nm, 67nm, 250nm, 345nm,
456nm, 778nm, 983nm, 1 μm, 3 μm, 4.5 μm, 5 μm, 7 μm, 11 μm, 15 μm or 20 μm.
In some specific embodiments of the present invention, magnetron sputtering, electron beam is can be used in the lithium silicon-carbon composite cathode layer
The PVD techniques such as evaporation, pulse laser deposition and atomic layer deposition deposit to form silicon-lithium alloy, further use hot-pressing technique
Carbon nano-particle is compounded within silicon-lithium alloy and is prepared.
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
In, filling, which is formed, between the column crystal anode layer 111 and the lithium silicon-carbon composite cathode layer 121 coats the column crystal
First electrolyte layer 13 in body surface face, first electrolyte layer 13 with a thickness of 1nm-50 μm.Specifically, first electrolysis
The thickness of matter layer 13 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.
The material of first electrolyte layer 13 includes calcium titanium-type solid electrolyte, NASICON type solid electrolyte, pomegranate
Stone-type solid electrolyte, LiGePS type sulfide solid electrolyte, LiSiPS type sulfide solid electrolyte or LiSnPS type sulphur
The combination of compound solid electrolyte one or more.
It is different with electrolyte in the prior art, is filled directly between positive and negative pole material, due in present embodiment
In, the anode layer 11 uses columnar grain, and with large surface area, therefore forming the first electrolyte layer 13 can be in lithium battery
Electrolyte and anode layer 111 between more reaction interfaces are provided, therefore, be conducive to the complete anti-of battery charge and discharge process
It answers.Further, when 13 thickness of the first electrolyte layer is larger, the surface of first electrolyte layer 13 is uniform, so as to
Guarantee that the surface field of negative electrode layer 121 is also uniformly distributed.
Please continue to refer to Fig. 3, in second 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 in one side of first electrolyte layer 13 towards the negative electrode layer 121, 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, so that the uniformity of the surface electric field distribution of the negative electrode layer 121 is improved, by the way that second electricity is arranged
Matter layer 14 is solved, the hardness of electrolyte layer can be also further increased, prevents positive and negative anodes contact from causing short circuit.
Please continue to refer to Fig. 4 A and Fig. 4 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 etc., is only used as example herein, not as the limitation 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 4 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 4 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 221 avalanche of negative electrode layer.
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. 5, fourth embodiment of the invention provides a lithium battery 30, the lithium battery 30 may include two continuous folded
The first lithium battery electric core 301 and the second lithium battery electric core 302 of layer setting.First lithium battery electric core 301 and the second lithium battery
A positive and negative copolar collector 31 is shared between core 302, which includes two opposite main surfaces 310,
In column crystal anode layer 311 is formed in a main surface 310, it is another using the anode structure as the first lithium battery electric core 301
Negative electrode layer 312 is formed in main surface 310, using the negative pole structure as the second lithium battery electric core 302.
Continue as shown in Figure 5, 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, towards 311 side shape of column crystal anode layer on negative current collector 32
At there is negative electrode layer 321, the plus plate current-collecting body 35 is equipped with anode layer 351 towards the surface of the positive and negative copolar collector 31,
In, the definitions relevant in relation to negative electrode layer 321 and anode layer 351 is as shown in above-mentioned second embodiment and 3rd embodiment, herein
It repeats no more.
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 in anode
The first electrolyte layer 33 of formation is filled between layer 351 and negative electrode layer 312, and is formed in the first electrolyte layer 33 towards described
The second electrolyte layer 34 on the surface of negative electrode layer 321, the negative electrode layer 312 towards the surface of second electrolyte layer 34 also
It can 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
It adjusts according to actual battery performance requirement.The above-mentioned restriction in relation to layer structure is only as an example, 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 301 or 302, at least partly lithium battery electric core 301 or 302 are arranged to form an entirety by continuous lamination, are arranged continuous
The shared collector of lithium battery electric core 301 or 302 of the centre of lamination setting, and the afflux of the lithium battery electric core 10 at both ends is set
Body is only used as plus plate current-collecting body or negative current collector.
Referring specifically to Fig. 6, the fifth embodiment of the present invention provides a lithium battery 40, and the lithium battery 40 includes multiple lithiums
Battery battery core 10, the lithium battery 40 can be made by way of being successively superimposed, the coincidence number of specific lithium ion list battery core 10
It measures unrestricted.
The lithium ion list battery core 10 include overlapping setting the first collector 41, anode layer 44, solid-state electrolyte layer 43,
Negative electrode layer 45 and the second collector 42.The lithium ion list battery core 10 being disposed adjacent is by sharing a plus plate current-collecting body 41 or cathode
Collector 42 is superimposed together.
As shown in Figure 6, shared second collector 42 at the superposition for two lithium battery electric cores 10 being disposed adjacent, i.e., second
Collector 42 is positive and negative copolar collector.As shown in the figure, be arranged in 42 two sides of the second collector be respectively anode layer 44 and
Negative electrode layer 45.It as shown in Figure 6, can be series connection between multiple lithium battery electric cores 40.When lithium battery electric core string 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 connection connection.
Referring to Fig. 7, 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 7, 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 7, 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. 7, 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. 8, 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 column crystal anode is formed on the wherein one side of the first collector
Layer；
Step S12 forms the first electrolyte layer by cladding on surface of the column crystal anode layer far from the first collector；
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
Solution matter includes calcium titanium-type solid electrolyte, NASICON type solid electrolyte, Garnet-type solid electrolyte, the vulcanization of LiGePS type
The group of object solid electrolyte, LiSiPS type sulfide solid electrolyte or LiSnPS type sulfide solid electrolyte one or more
It closes.
In some specific embodiments of the present invention, in above-mentioned steps S11, column crystal anode is formed on collector
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 2 microns of column crystals after 50 minutes.
The above-mentioned column crystal anode layer preparation method that is directed to is only as an example, not as the limitation of the invention.
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 preparation method P60 of the lithium battery specifically includes following step:
Step P11 provides one first collector, and column crystal anode is deposited on the wherein one side of the first collector
Layer, in the another side lithium deposition silicon-carbon composite cathode layer of collector；
Wherein, deposition column crystal anode layer can be carried out simultaneously or sequentially with lithium deposition silicon-carbon composite cathode layer.
After step P11, the following two kinds mode can be subdivided into:
The first is in the one side for being deposited with column crystal anode layer as substrate layer, and continuously forms required function on it
Ergosphere, specific steps include:
Step P12a successively forms the first electrolyte layer, the second electrolyte layer on the column crystal 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, specific steps include:
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, in the face layer by layer deposition required function layer for being deposited with column crystal anode layer or heavy
Product has the sequencing of a face layer by layer deposition required function layer of column crystal anode layer unrestricted, can successively carry out, can also
It carries 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 and its lithium battery have as follows
The utility model has the advantages that
(1) current collector structure provided by the present invention, lithium battery electric core and lithium battery, wherein collector includes two opposite
Main surface, column crystal anode layer is formed in one of main surface, it is another using the anode structure as a lithium battery electric core
Negative electrode layer is formed in main surface, using the negative pole structure as another lithium battery electric core.By being arranged on two faces of collector
Positive and negative anodes, to form the collector of positive and negative copolar, it can be achieved that prepared by multiple lithium battery electric core laminations, to realize that large area is entirely solid
The preparation of state 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 between multiple lithium battery electric cores, it can be achieved that be connected in series.When lithium battery electric core series connection connects 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 connecing.
In addition, in the present invention using the positive electrode including column crystal as anode layer, so as to be lithium ion
There is provided smooth diffusion and migrating channels during charge and discharge, the purpose of column crystal is that the high performance cathode of matching is realized just
The maximum of pole material utilizes, and improves the efficiency of lithium insertion and abjection.
(2) in the present invention, the lithium battery electric core and lithium battery can be further using directly on negative current collectors
The lithium silicon-carbon composite cathode layer of formation.It can further improve the energy density of lithium battery using lithium silicon-carbon composite cathode layer, thus
Obtain high-performance lithium ion core and its lithium battery.
(3) lithium battery electric core and lithium battery provided by the present invention further include being formed in lithium silicon-carbon composite cathode layer court
To the surface of the anode structure or in surface (i.e. described lithium silicon of the lithium silicon-carbon composite cathode layer far from the anode structure
Carbon compound cathode layer is towards the surface of second collector) on form a carbon base material layer.The setting of the carbon base material layer
The appearance of Li dendrite can be prevented, to improve the stability and safety of the lithium battery electric core and lithium battery.
(4) compound in the column crystal anode layer and the lithium silicon-carbon in lithium battery electric core and lithium battery of the present invention
Between negative electrode layer filling formed the first electrolyte layer, first electrolyte layer with a thickness of 1nm-50 μm.First electrolysis
Matter layer can coat the column crystal anode layer, therefore have large surface area, therefore forming the first electrolyte layer can be lithium battery
In electrolyte and anode layer between more reaction interfaces are provided, be conducive to the complete reaction of battery charge and discharge process.
(5) one can also be formed on the surface of first electrolyte layer in lithium battery electric core and lithium battery of the present invention
Two electrolyte layers can further improve the flatness and the negative terminal surface field distribution uniformity of first electrolyte layer, simultaneously
The hardness that can also increase by the first electrolyte layer prevents 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 column crystal anode layer, using the anode structure as a lithium battery electric core, shape in another main surface are formed in a main surface
At 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 column crystal anode layer, using the anode structure as the lithium battery electric core, another main table in one of main surface
Negative electrode layer is formed on face, 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；The column crystal anode layer includes one or more of groups in V, Mo, Mn, Ni, Fe, Co, Cr, Ti or Bi metallic element
The metal oxide of conjunction and contain lithium metal oxide.
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
It is formed in the negative electrode layer on one surface of the second collector, which includes lithium silicon-carbon composite cathode layer, and the negative electrode layer is towards described
Column crystal anode layer.
5. lithium battery electric core as claimed in claim 4, it is characterised in that: the lithium silicon-carbon composite cathode layer includes that deposition is formed
Silicon-lithium alloy on the negative current collector, carbon nano-particle are compounded within silicon-lithium alloy.
6. 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.
7. lithium battery electric core as claimed in claim 4, it is characterised in that: in the column crystal anode layer and the lithium silicon-carbon
Filling forms the first electrolyte layer for coating the column crystal between composite negative pole layer, first electrolyte layer with a thickness of
1nm-50μm。
8. lithium battery electric core as recited in claim 7, it is characterised in that: the lithium battery electric core includes being formed in described first
The second electrolyte layer in one side of the electrolyte layer towards the negative electrode layer, second electrolyte layer with a thickness of 1-
3000nm。
9. a kind of lithium battery, it is characterised in that: it includes the lithium battery electric core of at least two continuous lamination settings, and directly superposition is set
A positive and negative copolar collector is shared between at least two lithium battery electric cores set, which includes two opposite
Main surface forms column crystal anode layer in one of main surface, using the anode structure as a wherein 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.
10. lithium battery as claimed in claim 9, it is characterised in that: share two lithium batteries of a positive and negative copolar collector
It is to be connected in series or in parallel between core.
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