CN111987319A - Copper-aluminum integrated current collector electrode, laminated battery and preparation process - Google Patents
Copper-aluminum integrated current collector electrode, laminated battery and preparation process Download PDFInfo
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- CN111987319A CN111987319A CN202010922169.8A CN202010922169A CN111987319A CN 111987319 A CN111987319 A CN 111987319A CN 202010922169 A CN202010922169 A CN 202010922169A CN 111987319 A CN111987319 A CN 111987319A
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- current collector
- copper
- aluminum
- collector electrode
- foil
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- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 31
- 239000011889 copper foil Substances 0.000 claims abstract description 28
- 239000011888 foil Substances 0.000 claims abstract description 28
- 239000007773 negative electrode material Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000007774 positive electrode material Substances 0.000 claims abstract description 14
- 229910014336 LiNi1-x-yCoxMnyO2 Inorganic materials 0.000 claims abstract description 6
- 229910014446 LiNi1−x-yCoxMnyO2 Inorganic materials 0.000 claims abstract description 6
- 229910014825 LiNi1−x−yCoxMnyO2 Inorganic materials 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- HFCVPDYCRZVZDF-UHFFFAOYSA-N [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O Chemical compound [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O HFCVPDYCRZVZDF-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010439 graphite Substances 0.000 claims abstract description 5
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 5
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000003792 electrolyte Substances 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- -1 lithium hexafluorophosphate Chemical group 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 4
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000009713 electroplating Methods 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 239000012982 microporous membrane Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000010405 anode material Substances 0.000 description 3
- 239000010406 cathode material Substances 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910013716 LiNi Inorganic materials 0.000 description 1
- 229910015872 LiNi0.8Co0.1Mn0.1O2 Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 1
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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
- H01M4/661—Metal or alloys, e.g. alloy 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
-
- 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
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
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- Composite Materials (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Secondary Cells (AREA)
Abstract
Disclosure of the inventionA copper-aluminum integrated current collector electrode, a laminated battery and a preparation process are provided, wherein the current collector electrode comprises: the copper-aluminum current collector comprises a copper foil and an aluminum foil which are bonded, wherein the negative material is coated on one surface of the copper foil, and the positive material is coated on one surface of the aluminum foil; the positive electrode material comprises monocrystalline nickel cobalt lithium manganate LiNi1‑x‑yCoxMnyO2A material, the negative electrode material comprising a graphite or silicon carbon negative electrode material; the laminated battery comprises the current collector electrode; the preparation process is used for preparing the current collector electrode and the laminated battery. The invention provides the current collector electrode and the laminated battery with higher mass energy density and volume energy density, and the laminated battery has better safety and higher power performance, and the manufacturing process is simplified.
Description
Technical Field
The invention belongs to the field of batteries, and particularly relates to a copper-aluminum integrated current collector electrode, a laminated battery and a preparation process.
Background
Due to the rapid development of electric vehicles, consumers also put higher demands on the safety and endurance mileage of electric vehicles. Therefore, in order to adapt to development, the power battery needs to meet the characteristics of high volume energy density and high safety. At present, power lithium ion batteries adopted by electric automobiles are developed from mobile phone batteries or batteries of other small-sized equipment, and generally, a battery pack is formed by assembling single batteries, and then a battery system is formed by a plurality of battery packs. Such batteries have the following drawbacks: the single battery using the winding process is easy to cause uneven current distribution and poor heat dissipation due to the curvature of the electrode, and is easy to cause thermal runaway. In addition, the use of a laminated battery with separate positive and negative electrodes increases the complexity of the process and also reduces the volumetric energy density of the battery.
Disclosure of Invention
Aiming at the problems, the invention provides a copper-aluminum integrated current collector electrode, a copper-aluminum integrated current collector laminated battery and a preparation process of the copper-aluminum integrated current collector laminated battery for preparing the copper-aluminum integrated current collector electrode and the laminated battery.
In order to achieve the purpose, the invention adopts the technical scheme that:
a copper-aluminum integrated current collector electrode, comprising: the copper-aluminum current collector comprises a copper foil and an aluminum foil which are bonded, wherein the negative material is coated on one surface of the copper foil, and the positive material is coated on one surface of the aluminum foil; the positive electrode material comprises monocrystalline nickel cobalt lithium manganate LiNi1-x-yCoxMnyO2A material, the negative electrode material comprising a graphite or silicon carbon negative electrode material.
Preferably, the lithium nickel cobalt manganese LiNi1-x-yCoxMnyO2The average particle size of the material was 5 μm.
Preferably, the positive electrode material further comprises 3 wt% -4 wt% of polyvinylidene fluoride and 1.5 wt% -2.5 wt% of conductive carbon black.
Preferably, the negative electrode material further comprises 2.5 wt% -5 wt% of conductive carbon black, 1.0 wt% -2.0 wt% of carboxymethyl cellulose and 2.0 wt% -3.0 wt% of styrene-butadiene rubber.
Preferably, the thicknesses of the copper foil and the aluminum foil are respectively 3 μm and 3 μm, or 4 μm and 2 μm, and the length and width of the cross section of the copper-aluminum current collector is 10cm × 6cm, 20cm × 40cm, or 30cm × 50 cm.
Preferably, the thickness of the positive electrode material is 80 μm, and the thickness of the negative electrode material is 127 μm.
The utility model provides a copper aluminium integration mass flow body lamination battery, includes foretell copper aluminium integration mass flow body electrode, still includes diaphragm and electrolyte, the mass flow body electrode carries out the lamination and establishes ties into the pile, be equipped with between mass flow body electrode and the mass flow body electrode diaphragm and electrolyte.
Preferably, the electrolyte comprises an electrolyte and a solvent, the electrolyte is lithium hexafluorophosphate and has a concentration of 0.9mol/L, and the solvent comprises ethylene carbonate and dimethyl carbonate in a weight ratio of 1: 1.5.
preferably, the separator is a polypropylene monolayer microporous membrane.
A preparation process of a copper-aluminum integrated current collector laminated battery comprises the following steps:
preparing a copper-aluminum current collector, coating an adhesive on the surfaces of a copper foil and an aluminum foil, rolling to form the copper-aluminum current collector, or directly compounding the copper foil and the aluminum foil in a hot pressing manner to prepare the copper-aluminum current collector, or plating the surface of the aluminum foil with a copper foil or plating the surface of the copper foil with an aluminum foil by using an electroplating method;
coating a negative electrode material on one surface of the copper foil, and coating a positive electrode material on one surface of the aluminum foil to prepare a current collector electrode;
cutting the current collector electrode, stacking, connecting in series and combining to form a galvanic pile, arranging a diaphragm between the current collector electrode and the current collector electrode, and packaging the galvanic pile;
injecting electrolyte into the packaged galvanic pile, so that the electrolyte is filled between the current collector electrode and the current collector electrode;
and wrapping the shell to form the copper-aluminum integrated current collector laminated battery.
Compared with the prior art, the invention has the beneficial effects that:
1. the copper-aluminum integrated current collector electrode has higher mass energy density, can have certain strength under the condition that the mass of a current collector is obviously reduced due to the copper-aluminum integrated current collector electrode, and has the limit that the thickness of copper and aluminum is 2 mu m respectively, the mass of the current collector is reduced, so that the mass of a battery is reduced, the mass energy density of the battery is improved, the mass energy density is improved by 10 percent, and the energy density of a system is up to 220 Wh/kg.
2. The copper-aluminum integrated current collector electrode has high volume energy density, and the volume energy density is defined as the electric energy stored in a unit volume of battery. The volumetric energy density increase is mainly due to three aspects: firstly, the volume of the current collector is reduced, so that the volume of the battery is reduced, and the volume energy density is improved; secondly, after the current collectors are integrated, the contact between the current collectors can be effectively enhanced, and invalid gaps are reduced; thirdly, the use of a single crystal positive electrode material, which has a higher density than the polycrystalline material, and therefore will hold more mass of single crystal material per unit volume.
3. The copper-aluminum integrated current collector laminated battery has better safety, and the improvement of the safety can be attributed to three aspects: firstly, the thickness of the laminated battery is only 2-3cm generally, and the length and the width are 10cm and 6cm, so that the thermal diffusion distance can be effectively reduced, the heat exchange area can be enlarged, and the risk of thermal runaway can be reduced; secondly, the superposed battery pieces are arranged in parallel, so that the stress unevenness caused by electrode bending is avoided, the current density distribution is uniform, and the risk of battery short circuit can be effectively reduced; and thirdly, after the copper-aluminum current collectors are integrated, the internal resistance of the battery is reduced, the joule heat is reduced, and the risk of thermal runaway is reduced.
4. The copper-aluminum integrated current collector laminated battery has high power performance, and the power performance is improved due to the uniform distribution of the current density of the laminated battery and the reduction of the internal ohmic resistance of the battery.
5. The preparation process of the copper-aluminum integrated current collector laminated battery avoids the process complexity caused by the laminated battery with the separated positive electrode and the separated negative electrode, and the parallel overlapped electrode plates simplify the manufacturing process.
Drawings
Fig. 1 is a schematic structural view of a copper-aluminum current collector according to the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a top view of fig. 1.
Fig. 4 is a schematic structural view of a copper-aluminum integrated current collector electrode according to the present invention.
Fig. 5 is a front view of fig. 4.
Fig. 6 is a schematic structural view of a copper-aluminum integrated current collector laminated battery according to the present invention.
Wherein, 1, copper-aluminum current collector, 11, copper foil, 12 and aluminum foil; 2. a positive electrode material; 3. a negative electrode material; 4. a current collector electrode; 5. a separator and an electrolyte.
Detailed Description
For a better understanding of the present invention, the contents of the present invention will be further explained below with reference to the drawings and examples, but the present invention is not limited to the following examples.
Example one
As shown in fig. 1 to 5, a copper-aluminum integrated collector electrode includes: the cathode material comprises a copper-aluminum current collector 1, a cathode material 2 and an anode material 3. The copper-aluminum current collector 1 comprises a copper foil 11 and an aluminum foil 12 which are bonded, wherein one surface of the copper foil 11 is coated with a negative electrode material 3, and one surface of the aluminum foil 12 is coated with a positive electrode material 2. The thicknesses of the copper foil 11 and the aluminum foil 12 are 3 μm and 3 μm, or 4 μm and 2 μm, respectively, and the length and width of the cross section of the copper-aluminum current collector 1 is 10cm × 6cm, 20cm × 40cm, or 30cm × 50 cm. In this example, the copper foil 11 and the aluminum foil 12 were 3 μm and 3 μm thick, respectively, the positive electrode material 2 was 80 μm thick, and the negative electrode material 3 was 127 μm thick.
The anode material 2 comprises 3-4 wt% of polyvinylidene fluoride, 1.5-2.5 wt% of conductive carbon black and the balance of monocrystalline nickel cobalt lithium manganate LiNi1-x-yCoxMnyO2A material. LiNi lithium nickel cobalt manganese oxide1-x-yCoxMnyO2The average particle size of the material was 5 μm.
The negative electrode material 3 comprises 2.5-5 wt% of conductive carbon black, 1.0-2.0 wt% of carboxymethyl cellulose, 2.0-3.0 wt% of styrene butadiene rubber and the balance of graphite or silicon carbon negative electrode material 3.
Example two
As shown in fig. 6, a copper-aluminum integrated current collector laminated battery includes the copper-aluminum integrated current collector electrode described in the first embodiment, and further includes a separator and an electrolyte 5, the current collector electrode 4 is laminated and connected in series to form a stack, and the separator and the electrolyte 5 are disposed between the current collector electrode 4 and the current collector electrode 4.
The electrolyte comprises electrolyte and solvent, the electrolyte is lithium hexafluorophosphate, the concentration is 0.9mol/L, the solvent comprises ethylene carbonate and dimethyl carbonate, and the weight ratio of the ethylene carbonate to the dimethyl carbonate is 1: 1.5. the diaphragm is a polypropylene single-layer microporous film.
EXAMPLE III
A preparation process of a copper-aluminum integrated current collector laminated battery is used for preparing the copper-aluminum integrated current collector laminated battery in the embodiment II, and comprises the following steps:
1. preparing a copper-aluminum current collector 1, coating an adhesive on the surfaces of a copper foil 11 and an aluminum foil 12, rolling to form the copper-aluminum current collector 1, or directly hot-pressing and compounding the copper foil 11 and the aluminum foil 12 to prepare the copper-aluminum current collector 1, or plating the copper foil 11 on the surface of the aluminum foil 12 or plating the aluminum foil 12 on the surface of the copper foil 11 by using an electroplating method.
2. A negative electrode material 3 was coated on one side of the copper foil 11, and a positive electrode material 2 was coated on one side of the aluminum foil 12, to prepare a current collector electrode 4.
3. And cutting the current collector electrode 4, stacking, connecting in series and combining to form a galvanic pile, arranging a diaphragm between the current collector electrode 4 and the current collector electrode 4, and packaging the galvanic pile.
4. Electrolyte is injected into the packaged stack, so that the electrolyte is filled between the current collector electrode 4 and the current collector electrode 4.
5. And wrapping the shell to form the copper-aluminum integrated current collector laminated battery.
The voltage of the laminated battery can be designed according to the requirement, such as 110 layers, 400V, or 220 layers, 800V. If it is a single crystal LiNi0.8Co0.1Mn0.1O2As the anode material, graphite is used as the cathode material, the volume energy density of the corresponding battery pack is 1000Wh/L according to the calculation of relevant parameters, after the battery system is assembled, if the volume energy density of the battery system is 750Wh/L according to the calculation of 75% of efficiency, the entire vehicle can be loaded with 120kwh of electric energy according to the occupied volume of 160L (1.6m multiplied by 1.2m multiplied by 8cm) of batteries at the bottom of the vehicle, 150kwh of electric energy can be accommodated according to 200L, the neDC endurance of the electric vehicle respectively exceeds 1000km and 1200km, and the endurance can respectively reach nearly 500km and 600km when the vehicle continuously runs at the high speed of 120km/h, thereby being comparable to a fuel vehicle.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A copper-aluminum integrated current collector electrode is characterized by comprising: the copper-aluminum current collector comprises a copper foil and an aluminum foil which are bonded, wherein the negative material is coated on one surface of the copper foil, and the positive material is coated on one surface of the aluminum foil; the positive electrode material comprises monocrystalline nickel cobalt lithium manganate LiNi1-x-yCoxMnyO2A material, the negative electrode material comprising a graphite or silicon carbon negative electrode material.
2. According to claimThe copper-aluminum integrated current collector electrode in claim 1, wherein the nickel cobalt lithium manganate LiNi1-x-yCoxMnyO2The average particle size of the material was 5 μm.
3. The integrated copper-aluminum current collector electrode according to claim 1, wherein the positive electrode material further comprises 3 wt% to 4 wt% of polyvinylidene fluoride and 1.5 wt% to 2.5 wt% of conductive carbon black.
4. The integrated copper-aluminum current collector electrode according to claim 1, wherein the negative electrode material further comprises 2.5-5 wt% of conductive carbon black, 1.0-2.0 wt% of carboxymethyl cellulose, and 2.0-3.0 wt% of styrene-butadiene rubber.
5. The integrated copper-aluminum current collector electrode according to claim 1, wherein the copper foil and the aluminum foil have a thickness of 3 μm and 3 μm, or 4 μm and 2 μm, respectively, and the cross section of the copper-aluminum current collector has a length and a width of 10cm x 6cm, 20cm x 40cm, or 30cm x 50 cm.
6. The integrated copper-aluminum current collector electrode according to claim 1, wherein the thickness of the positive electrode material is 80 μm, and the thickness of the negative electrode material is 127 μm.
7. A copper-aluminum integrated current collector laminated battery, characterized in that, comprises the copper-aluminum integrated current collector electrode of any one of claims 1-6, and further comprises a diaphragm and electrolyte, the current collector electrode is laminated and connected in series to form a pile, and the diaphragm and the electrolyte are arranged between the current collector electrode and the current collector electrode.
8. The copper-aluminum integrated current collector laminated battery as claimed in claim 7, wherein the electrolyte comprises electrolyte and solvent, the electrolyte is lithium hexafluorophosphate with concentration of 0.9mol/L, the solvent comprises ethylene carbonate and dimethyl carbonate with weight ratio of 1: 1.5.
9. the copper-aluminum integrated current collector laminated battery as claimed in claim 7, wherein the separator is a polypropylene single-layer microporous membrane.
10. A preparation process of a copper-aluminum integrated current collector laminated battery is characterized by comprising the following steps:
preparing a copper-aluminum current collector, coating an adhesive on the surfaces of a copper foil and an aluminum foil, rolling to form the copper-aluminum current collector, or directly compounding the copper foil and the aluminum foil in a hot pressing manner to prepare the copper-aluminum current collector, or plating the surface of the aluminum foil with a copper foil or plating the surface of the copper foil with an aluminum foil by using an electroplating method;
coating a negative electrode material on one surface of the copper foil, and coating a positive electrode material on one surface of the aluminum foil to prepare a current collector electrode;
cutting the current collector electrode, stacking, connecting in series and combining to form a galvanic pile, arranging a diaphragm between the current collector electrode and the current collector electrode, and packaging the galvanic pile;
injecting electrolyte into the packaged galvanic pile, so that the electrolyte is filled between the current collector electrode and the current collector electrode;
and wrapping the shell to form the copper-aluminum integrated current collector laminated battery.
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