CN107437625A - A kind of two-sided heterogeneous collector and preparation method thereof, lithium battery - Google Patents
A kind of two-sided heterogeneous collector and preparation method thereof, lithium battery Download PDFInfo
- Publication number
- CN107437625A CN107437625A CN201610353579.9A CN201610353579A CN107437625A CN 107437625 A CN107437625 A CN 107437625A CN 201610353579 A CN201610353579 A CN 201610353579A CN 107437625 A CN107437625 A CN 107437625A
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- Prior art keywords
- collector
- dignity
- current collector
- negative pole
- negative
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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
Abstract
The invention discloses a kind of collector, the collector has negative pole currect collecting dignity and anode collection dignity, and the negative pole currect collecting dignity is prepared by negative current collector material, and the anode collection dignity is prepared by positive current collector material.The two-sided heterogeneous collector that the present invention provides in fact takes into account the characteristic required for both positive and negative polarity collector, can realize in cell indoor design series-mode frame, so as to improve the output voltage of cell.
Description
Technical field
The present invention relates to electrochemical field, more particularly to a kind of two-sided heterogeneous collector and preparation method thereof,
Lithium battery.
Background technology
Organic liquid electrolytes are generally used in current commercialized lithium ion battery, because organic solvent has
Have flammable and decomposition be oxidized easily under higher current potential, therefore potential security be present,
The application of high-voltage anode material is limited simultaneously.Therefore, high performance solid electrolyte material pair is developed
Have great importance in the security for solving battery and the energy density for improving battery.
Because current lithium battery collector generally only has simple function, such as negative current collector using cupric or
Cu alloy material, plus plate current-collecting body use aluminum or aluminum alloy, and this two classes material can not take into account both positive and negative polarity afflux
The characteristic that body needs, therefore series arrangement inside cell can not be designed from structure.It is in addition, existing
In technology, lithium battery uses liquid electrolyte, also causes inside battery can not use series system, because
The mobility of liquid electrolyte, it may appear that situations such as self discharge, voltage antipole and internal short-circuit.
Therefore, in the prior art, in order to obtain stable high output voltage, generally cell is designed
The mode of battery pack is formed for external series.This is very for the equipment for needing space-efficient
Unfavorable.
The content of the invention
In view of the above-mentioned problems, in a first aspect, the embodiments of the invention provide a kind of collector, the collection
Fluid has negative pole currect collecting dignity and anode collection dignity, and the negative pole currect collecting dignity is by negative current collector
Prepared by material, the anode collection dignity is prepared by positive current collector material.
It is preferably, honorable and/or the plus plate current-collecting body face has conductive coating in the negative pole currect collecting,
The conductive coating materials are the carbon particle of conductive son, native graphite, Delanium, CNT, carbon
A kind of material or multiple material compound in nanofiber, graphene.
Preferably, the conductive coating includes binding agent, and the bonding agent is Kynoar, carboxymethyl
Cellulose, PMA, polyamidoimide, polyimides, PEO, polycyclic oxygen third
One or more in alkane, butadiene-styrene rubber, polyacrylonitrile, cyclodextrin and pectin.
Preferably, the thickness of the conductive coating is 50nm-5 μm.
Preferably, the negative current collector material is that the copper of copper, copper mass percentage more than or equal to 80% closes
One or more in gold, stainless steel, titanium, titanium alloy, nickel, nickel alloy, iron and ferroalloy.
Preferably, the thickness of the honorable and described anode collection dignity of the negative pole currect collecting is 0.5 μm -50 μm.
Preferably, the positive current collector material is in aluminium, titanium, stainless steel, aluminium alloy and titanium alloy
It is one or more.
Preferably, the collector is membranaceous or foil-like structure.
Second aspect, the embodiments of the invention provide a kind of preparation method of collector, including following step
Suddenly：
By roll-in or roll negative current collector material and positive current collector material is compound, be prepared
Collector with negative pole currect collecting dignity and anode collection dignity.
Preferably, the preparation method is further comprising the steps of：It is honorable and/or described in the negative pole currect collecting
Conductive coating is coated in anode collection dignity.
The third aspect, the embodiments of the invention provide the preparation method of another collector, including it is following
Step：Strengthened by thermal evaporation, electron beam evaporation, magnetron sputtering, pulsed laser deposition, plasma
One or more modes in vapour deposition, chemical vapor deposition, chemical plating, electrochemical plating, negative
In the current collector material of pole deposit one layer of positive current collector material, be prepared with negative pole currect collecting dignity and
The collector of anode collection dignity；Or pass through thermal evaporation, electron beam evaporation, magnetron sputtering, arteries and veins
In impulse light deposition, plasma enhanced chemical vapor deposition, chemical vapor deposition, chemical plating, electrochemical plating
One or more modes, in membranaceous or foil-like positive current collector material deposit one layer of negative current collector
Material, the collector with negative pole currect collecting dignity and anode collection dignity is prepared.
Preferably, the preparation method is further comprising the steps of：It is honorable and/or described in the negative pole currect collecting
Conductive coating is coated in anode collection dignity.
Fourth aspect, the embodiments of the invention provide a kind of electrode plates, the electrode plates include negative
Pole material, positive electrode, and the collector that first aspect provides.
5th aspect, the embodiments of the invention provide a kind of lithium battery, including electrolyte, one or more
The electrode plates that individual fourth aspect provides；The electrolyte includes liquid electrolyte, gel-type polymeric
Electrolyte or solid electrolyte；Wherein, the liquid electrolyte is included in barrier film.
6th aspect, the embodiments of the invention provide a kind of preparation method of lithium battery, methods described bag
Include：By the equidirectional arrangement of the electrode plates of multiple fourth aspects；Between the electrode plates, insertion
Electrolyte；The electrolyte is liquid electrolyte, gel-type polymeric electrolyte or solid electrolyte.
Two-sided heterogeneous collector provided in an embodiment of the present invention takes into account the characteristic required for both positive and negative polarity collector,
It can realize in cell indoor design series-mode frame, so as to improve the output voltage of cell；
Also, the liquid electrolyte coated using solid electrolyte or barrier film, series design is carried out in inside battery
When, situations such as avoiding voltage antipole, self discharge and internal short-circuit.It is in addition, provided in an embodiment of the present invention
Two-sided heterogeneous collector has coat, and the coat improves the conductive characteristic of collector and to electrode layer
Adhesion, prevent electrode layer from being come off with collector, reduce the internal resistance of cell.
Brief description of the drawings
Fig. 1 is the monomer battery structure schematic diagram that comparative example of the present invention provides；
Fig. 2 is the structural representation of cell internal series-connection provided in an embodiment of the present invention；
Fig. 3 is that electrolytic method provided in an embodiment of the present invention prepares copper foil process schematic diagram；
Fig. 4 is the structural representation of collector provided in an embodiment of the present invention；
Fig. 5 is the ESEM of the conductive carbon particle of anode collection provided in an embodiment of the present invention dignity coating
Picture；
Fig. 6 is the ESEM of the conductive graphene of anode collection provided in an embodiment of the present invention dignity coating
Picture；
Fig. 7 is the conductive carbon particle and graphene of the mixed coating of anode collection provided in an embodiment of the present invention dignity
Scanning electron microscopic picture.
Embodiment
Below by drawings and examples, the present invention is described in further detail, but is not intended to
Limit the scope of the invention.
In a first aspect, the embodiments of the invention provide a kind of collector, the collector has negative pole collection
Fluid surface and anode collection dignity, the negative pole currect collecting dignity prepared by negative current collector material, it is described just
Pole afflux dignity is prepared by positive current collector material.
Collector provided in an embodiment of the present invention takes into account the characteristic required for both positive and negative polarity collector, can realize
In cell indoor design series-mode frame, so as to improve the output voltage of cell.
In a preferred embodiment, it is honorable and/or the plus plate current-collecting body face has in the negative pole currect collecting
Conductive coating, the conductive coating materials are the carbon particle of conductive son, native graphite, Delanium, carbon
A kind of material or multiple material compound in nanotube, carbon nano-fiber, graphene.
In a preferred embodiment, the conductive coating includes binding agent, and the bonding agent is polyvinylidene fluoride
Alkene, carboxymethyl cellulose, PMA, polyamidoimide, polyimides, PEO,
One or more in PPOX, butadiene-styrene rubber, polyacrylonitrile, cyclodextrin and pectin.
In a preferred embodiment, the thickness of the conductive coating is 50nm-5 μm.
Collector provided in an embodiment of the present invention has conductive coating, and the conductive coating improves collector
Conductive characteristic and the adhesion to electrode layer, prevent electrode layer from being come off with collector, reduce the internal resistance of cell.
In a preferred embodiment, the negative current collector material is that copper, copper mass percentage are more than or equal to
80% copper alloy, stainless steel, titanium, titanium alloy, nickel, nickel alloy, iron and one kind or more in ferroalloy
Kind.
In a preferred embodiment, the thickness of the honorable and described anode collection dignity of the negative pole currect collecting is 0.5
μm-50μm。
In a preferred embodiment, the positive current collector material be aluminium, titanium, stainless steel, aluminium alloy and
One or more in titanium alloy.
In a preferred embodiment, the collector is membranaceous or foil-like structure.
Second aspect, the embodiments of the invention provide a kind of preparation method of collector, including following step
Suddenly：By roll-in or roll negative current collector material and positive current collector material is compound, be prepared
Collector with negative pole currect collecting dignity and anode collection dignity.
In a preferred embodiment, the preparation method is further comprising the steps of：In the negative current collector
Conductive coating is coated in face and/or the anode collection dignity.
The third aspect, the embodiments of the invention provide the preparation method of another collector, including it is following
Step：Strengthened by thermal evaporation, electron beam evaporation, magnetron sputtering, pulsed laser deposition, plasma
One or more modes in vapour deposition, chemical vapor deposition, chemical plating, electrochemical plating, negative
In the current collector material of pole deposit one layer of positive current collector material, be prepared with negative pole currect collecting dignity and
The collector of anode collection dignity；Or pass through thermal evaporation, electron beam evaporation, magnetron sputtering, arteries and veins
In impulse light deposition, plasma enhanced chemical vapor deposition, chemical vapor deposition, chemical plating, electrochemical plating
One or more modes, in membranaceous or foil-like positive current collector material deposit one layer of negative current collector
Material, the collector with negative pole currect collecting dignity and anode collection dignity is prepared.
In a preferred embodiment, the preparation method is further comprising the steps of：In the negative current collector
Conductive coating is coated in face and/or the anode collection dignity.
Fourth aspect, the embodiments of the invention provide a kind of electrode plates, the electrode plates include negative
Pole material, positive electrode, and the collector that first aspect provides.
5th aspect, the embodiments of the invention provide a kind of lithium battery, including electrolyte, one or more
The electrode plates that individual fourth aspect provides；The electrolyte includes liquid electrolyte, gel-type polymeric
Electrolyte or solid electrolyte；Wherein, the liquid electrolyte is included in barrier film.
6th aspect, the embodiments of the invention provide a kind of preparation method of lithium battery, methods described bag
Include：By the equidirectional arrangement of the electrode plates of multiple fourth aspects；Between the electrode plates, insertion
Electrolyte；The electrolyte is liquid electrolyte, gel-type polymeric electrolyte or solid electrolyte.
Collector provided in an embodiment of the present invention takes into account the characteristic required for both positive and negative polarity collector, can realize
In cell indoor design series-mode frame, so as to improve the output voltage of cell；Also,
The liquid electrolyte coated using solid electrolyte or barrier film, when inside battery carries out series design, keep away
Situations such as having exempted from voltage antipole, self discharge and internal short-circuit.In addition, collector provided in an embodiment of the present invention
With conductive coating, the conductive coating improves the conductive characteristic of collector and the adhesion to electrode layer,
Prevent electrode layer from being come off with collector, reduce the internal resistance of cell.
The above embodiment of the present invention is more fully described now with reference to specific embodiment and comparative example below to carry
Collector of confession and preparation method thereof, lithium battery and preparation method thereof.These embodiments and comparative example are unexpectedly
The scope of figure limitation the above embodiment of the present invention.
Comparative example 1
Contrast 1 provides a kind of lithium ion single battery in the prior art.As shown in figure 1, the lithium ion
Battery is by positive pole ear 1, negative lug 2, plus plate current-collecting body 3, anode layer 4, dielectric substrate 5, negative pole
Layer 6, negative current collector 8, encapsulating material 9 form.
The characteristic required for both positive and negative polarity collector can not be taken into account due to collector of the prior art, so nothing
Method is designed to internal series-connection formula structure.Further, since the liquid electrolyte used has mobility, therefore,
Even if using internal series-connection formula structure, also occur self discharge, voltage antipole and it is short-circuit situations such as.
Embodiment 1
Embodiment 1 provides a kind of solid lithium ion list using two-sided heterogeneous collector provided by the invention
Body battery.As shown in Fig. 2 the lithium ion battery is by positive pole ear 1, negative lug 2, plus plate current-collecting body
3rd, anode layer 4, dielectric substrate 5, negative electrode layer 6, two-sided heterogeneous collector 7, negative current collector 8, envelope
Package material 9 forms.Wherein, a negative electrode layer 6, one of dielectric substrate 5, one of anode layer 4, one
Two-sided heterogeneous collector 7 forms one group, and multiple groups of series connection are placed in cell, i.e., the cell has
There is internal series-connection formula structure, so as to improve the output voltage of the cell.
Embodiment 2
Embodiment 2 provides a kind of collector.As shown in figure 3, the collector includes negative pole currect collecting dignity
Conductive coating 7-1, negative pole currect collecting dignity 7-2, anode collection dignity 7-3, anode collection dignity conductive coating
7-4。
When collector is prepared in atmosphere, surface would generally form thin oxide layer.Oxide layer can reduce electrode
Adhesion between layer and collector, therefore, in collector both sides coating functions conductive coating, and
Bonding agent is added in coating, to increase the adhesive force between electrode layer and collector, while improves interlayer electronics
Electric conductivity, cell resistance is reduced, improve voltage and ability output.
Embodiment 3
Embodiment 3 provides a kind of preparation method of collector.In the present embodiment based on titanium foil, lead to
Electro-plating method is crossed, copper foil is plated on titanium foil, so as to be prepared for one side as plus plate current-collecting body titanium foil, another
Face is the collector of negative current collector copper foil.As shown in figure 4,10 be plating roller negative electrode, 11 be anode,
12 be electrolytic cell, and 13 is batch, and are copper-bath in electrolytic cell.
In addition, in addition to above-mentioned electro-plating method, also thermal evaporation, electron beam evaporation, magnetron sputtering,
Pulsed laser deposition, plasma enhanced chemical vapor deposition, chemical vapor deposition, chemical plating, electrochemical plating etc.
Mode can prepare the collector.
Embodiment 4
Embodiment 4 provides the collector that a kind of conductive coating is conductive carbon particle.As shown in figure 5, should
The thickness of conductive coating is 1um-3um, and the average grain diameter of carbon particle is about 340nm.
Embodiment 5
Embodiment 5 provides the collector that a kind of conductive coating is graphene.As shown in fig. 6, the conduction
The thickness of coating is 1um-3um.
Embodiment 6
Embodiment 6 provides a kind of conductive coating as conductive carbon particle and the afflux of graphene mixing coat
Body.As shown in fig. 7, the thickness of the conductive coating is 1um-3um, the average grain diameter of carbon particle is about 340nm.
Embodiment 7-42
Embodiment 7-42 respectively provides a kind of collector and preparation method thereof.
In following embodiment 7-42, used material is as follows：
(1) current collector material
Positive current collector material 1:Aluminium；Positive current collector material 2：Aluminium alloy；Positive current collector material 3：
Stainless steel；Positive current collector material 4：Titanium；Positive current collector material 5：Titanium alloy；Plus plate current-collecting body material
Material 6：Other suitable positive current collector materials
Negative current collector material 1：Copper；Negative current collector material 2：It is higher than 80% copper containing Copper mass fraction
Alloy；Negative current collector material 3：Nickel；Negative current collector material 4：Nickel alloy；Negative current collector material
5：Titanium；Negative current collector material 6：Titanium alloy；Negative current collector material 7：Iron；Negative current collector material
Material 8：Ferroalloy；Negative current collector material 9：Other suitable negative current collector materials
(2) afflux preparation
The thermal evaporation of preparation method 1；Preparation method 2：Electron beam evaporation；Preparation method 3：Magnetron sputtering；
Preparation method 4：Pulsed laser deposition；Preparation method 5：Plasma enhanced chemical vapor deposits；Preparation method 6：
Chemical vapor deposition；Preparation method 7：Chemical plating；Preparation method 8：Electrochemical plating；Preparation method 9：
It is other to prepare above-mentioned afflux body method.
(3) collector conductive coating materials
Conductive coating materials 1：Carbon particle；Conductive coating materials 2：Native graphite；Conductive coating materials 3：
Delanium；Conductive coating materials 4：CNT；Conductive coating materials 5：Carbon nano-fiber；It is conductive
Coating material 6：Graphene；Conductive coating materials 7：One or more in conductive coating materials 1-6 are answered
Compound
(4) conductive coating binding agent classification
Conductive coating binding agent 1：Kynoar；Conductive coating binding agent 2：Carboxymethyl cellulose；
Conductive coating binding agent 3：PMA；Conductive coating binding agent 4：Polyamidoimide；It is conductive
Adhesive coating 5：Polyimides；Conductive coating binding agent 6：PEO；Conductive coating bonds
Agent 7：PPOX；Conductive coating binding agent 8：Butadiene-styrene rubber；Conductive coating binding agent 9：Poly- third
Alkene nitrile；Conductive coating binding agent 10：Cyclodextrin；Conductive coating binding agent 11：Pectin；Conductive coating
Binding agent 12：The different proportion compound of above-mentioned binding agent other is suitable for conductive coating binding agent
Material.
The positive current collector material used in collector that embodiment 7-42 is provided, negative current collector material, just
Pole-face conductive coating materials, negative pole face conductive coating materials, positive pole finishing coat binding agent, negative pole finishing coat
Binding agent and gross thickness, positive pole face thickness, negative pole face thickness, positive pole finishing coat thickness, the painting of negative pole face
Thickness degree is shown in Table 1.
Table 1
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out
Be further described, should be understood that the embodiment that the foregoing is only of the invention and
, the protection domain being not intended to limit the present invention, within the spirit and principles of the invention, done
Any modification, equivalent substitution and improvements etc., should be included in the scope of the protection.
Claims (15)
1. a kind of collector, it is characterised in that the collector has negative pole currect collecting dignity and positive pole collection
Fluid surface, the negative pole currect collecting dignity are prepared by negative current collector material, and the anode collection dignity is by just
It is prepared by pole current collector material.
2. collector according to claim 1, it is characterised in that the negative pole currect collecting dignity and
/ or the plus plate current-collecting body face there is conductive coating, the conductive coating materials for conductive son carbon particle,
A kind of material or a variety of in native graphite, Delanium, CNT, carbon nano-fiber, graphene
Material composite.
3. collector according to claim 2, it is characterised in that the conductive coating, which includes, to be bonded
Agent, the bonding agent are Kynoar, carboxymethyl cellulose, PMA, polyamide acyl Asia
Amine, polyimides, PEO, PPOX, butadiene-styrene rubber, polyacrylonitrile, cyclodextrin and
One or more in pectin.
4. the collector according to Claims 2 or 3, it is characterised in that the thickness of the conductive coating
Spend for 50nm-5 μm.
5. collector according to claim 1, it is characterised in that the negative current collector material is
The copper alloy of copper, copper mass percentage more than or equal to 80%, stainless steel, titanium, titanium alloy, nickel, nickel close
One or more in gold, iron and ferroalloy.
6. collector according to claim 1, it is characterised in that the negative pole currect collecting dignity and institute
The thickness for stating anode collection dignity is 0.5 μm -50 μm.
7. collector according to claim 1, it is characterised in that the positive current collector material is
One or more in aluminium, titanium, stainless steel, aluminium alloy and titanium alloy.
8. collector according to claim 1, it is characterised in that the collector is membranaceous or paper tinsel
Shape structure.
9. a kind of preparation method of collector, it is characterised in that comprise the following steps：
By roll-in or roll negative current collector material and positive current collector material is compound, be prepared
Collector with negative pole currect collecting dignity and anode collection dignity.
10. preparation method according to claim 9, it is characterised in that further comprising the steps of：
The negative pole currect collecting is honorable and/or the anode collection dignity on coat conductive coating.
11. a kind of preparation method of collector, it is characterised in that comprise the following steps：
Gas is strengthened by thermal evaporation, electron beam evaporation, magnetron sputtering, pulsed laser deposition, plasma
Mutually one or more modes in deposition, chemical vapor deposition, chemical plating, electrochemical plating, in negative pole
In current collector material deposit one layer of positive current collector material, be prepared with negative pole currect collecting dignity and just
The collector of pole afflux dignity；
Or pass through thermal evaporation, electron beam evaporation, magnetron sputtering, pulsed laser deposition, plasma
Strengthen one or more modes in vapour deposition, chemical vapor deposition, chemical plating, electrochemical plating,
One layer of negative current collector material is deposited in membranaceous or foil-like positive current collector material, being prepared has
The collector of negative pole currect collecting dignity and anode collection dignity.
12. preparation method according to claim 11, it is characterised in that further comprising the steps of：
The negative pole currect collecting is honorable and/or the anode collection dignity on coat conductive coating.
13. a kind of electrode plates, it is characterised in that the electrode plates include negative material, positive pole
Material, and the collector as described in claim 1-8 any claims.
14. a kind of lithium battery, it is characterised in that including electrolyte, one or more such as claims
Electrode plates described in 14；The electrolyte include liquid electrolyte, gel-type polymeric electrolyte or
Solid electrolyte；Wherein, the liquid electrolyte is included in barrier film.
15. a kind of preparation method of lithium battery, it is characterised in that methods described includes：
By the equidirectional arrangement of multiple electrode plates as claimed in claim 13；
Between the electrode plates, electrolyte is inserted；The electrolyte is liquid electrolyte, gel
Birds of the same feather flock together polymer electrolyte or solid electrolyte.
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| CN201610353579.9A CN107437625A (en) | 2016-05-25 | 2016-05-25 | A kind of two-sided heterogeneous collector and preparation method thereof, lithium battery |
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| CN201610353579.9A CN107437625A (en) | 2016-05-25 | 2016-05-25 | A kind of two-sided heterogeneous collector and preparation method thereof, lithium battery |
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| CN111430722A (en) * | 2020-04-07 | 2020-07-17 | 武汉兰钧新能源科技有限公司 | Paper current collector, preparation method thereof, electrode and battery |
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| CN109980234A (en) * | 2019-03-29 | 2019-07-05 | 宁德新能源科技有限公司 | Composite current collector and composite pole piece and electrochemical appliance comprising it |
| CN111430722A (en) * | 2020-04-07 | 2020-07-17 | 武汉兰钧新能源科技有限公司 | Paper current collector, preparation method thereof, electrode and battery |
| CN111799471A (en) * | 2020-08-07 | 2020-10-20 | 北京新能源汽车技术创新中心有限公司 | Current collector, preparation method of current collector, solid-state battery and automobile |
| WO2022262287A1 (en) * | 2021-06-15 | 2022-12-22 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
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