CN114843453A - Pole piece manufacturing method, pole piece and battery - Google Patents
Pole piece manufacturing method, pole piece and battery Download PDFInfo
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- CN114843453A CN114843453A CN202210647376.6A CN202210647376A CN114843453A CN 114843453 A CN114843453 A CN 114843453A CN 202210647376 A CN202210647376 A CN 202210647376A CN 114843453 A CN114843453 A CN 114843453A
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- pole piece
- active material
- current collector
- collector layer
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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
- H01M4/139—Processes of manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0421—Methods of deposition of the material involving vapour deposition
- H01M4/0423—Physical vapour deposition
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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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0421—Methods of deposition of the material involving vapour deposition
- H01M4/0423—Physical vapour deposition
- H01M4/0426—Sputtering
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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
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0433—Molding
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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
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
- H01M4/623—Binders being polymers fluorinated polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
Abstract
The invention discloses a pole piece manufacturing method, a pole piece and a battery, which are used for solving the technical problems that the battery generates heat seriously during quick charge and is easy to cause safety risk because the contact internal resistance between a current collector of the conventional battery pole piece and an electrode active material is larger. The method comprises the steps of stirring a binder, an electrode active material and a conductive agent to obtain mixed powder; s2, rolling the mixed powder and pressing to a preset thickness to form a diaphragm, plating a current collector layer on one surface of the diaphragm, and rolling the current collector layer to obtain the pole piece. In the pole piece manufacturing method of the embodiment, the current collector layer can be in close contact with the electrode active material, so that the contact internal resistance between the current collector layer and the electrode active material is greatly reduced, the heating of the battery can be reduced during quick charging, and the safety risk is reduced as much as possible.
Description
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a pole piece manufacturing method, a pole piece and a battery.
Background
The rechargeable battery has the outstanding characteristics of light weight, high energy density, no pollution, no memory effect, long service life and the like, so the rechargeable battery is widely applied to the fields of mobile phones, computers, household appliances, electric tools and the like. Among them, the charging time and the service life of the rechargeable battery are more and more emphasized by the terminal consumers, and are also important factors for limiting the development of the rechargeable battery.
Therefore, many current battery manufacturers have successively provided batteries capable of being rapidly charged for meeting the requirements of consumers, but the batteries have large contact internal resistance between the current collectors on the pole pieces and the electrode active materials, so that the batteries have large heat productivity when rapidly charged, are easy to cause safety risks, and bring certain potential safety hazards to the consumers.
Therefore, it is an important subject of research by those skilled in the art to find a method for manufacturing a pole piece, a pole piece and a battery capable of solving the above technical problems.
Disclosure of Invention
The embodiment of the invention discloses a pole piece manufacturing method, a pole piece and a battery, which are used for solving the technical problems that the battery generates heat seriously during quick charge and is easy to cause safety risk because the contact internal resistance between a current collector of the conventional battery pole piece and an electrode active material is larger.
The embodiment of the invention provides a pole piece manufacturing method, which comprises the following steps:
s1, stirring the binder, the electrode active material and the conductive agent to obtain mixed powder;
s2, rolling the mixed powder and pressing to a preset thickness to form a diaphragm, plating a current collector layer on one surface of the diaphragm, and rolling the current collector layer to obtain the pole piece.
Optionally, the electrode active material is a positive electrode active material or a negative electrode active material;
the positive active material comprises one or more of nickel cobalt lithium manganate, lithium iron phosphate, lithium manganate, nickel cobalt aluminum, lithium cobaltate and lithium titanate;
the negative active material includes one or more of a graphite active material, a silicon carbon active material, or a silica active material.
Optionally, the conductive agent comprises one or more of conductive carbon, carbon nanotubes, activated carbon, ketjen black, acetylene black, graphene, graphite flakes, graphite particles, carbon fibers, intermediate carbon microspheres.
Optionally, the binder comprises one or more of polyvinylidene fluoride, polytetrafluoroethylene, sodium carboxymethyl cellulose, styrene butadiene rubber, polyacrylic acid, polyvinyl alcohol, polyacrylate, silicone resin, epoxy resin, polyurethane, phenolic resin, polyimide resin, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer, acrylonitrile multipolymer.
Optionally, the current collector layer is a copper metal layer or an aluminum metal layer plated on one of the surfaces of the membrane sheet by means of magnetron sputtering or vacuum evaporation.
Optionally, the step S2 specifically includes:
preparing a lug production mold, wherein the lug production mold is provided with a groove sunken into the lug production mold, and lug pad protruding platforms are arranged at two opposite ends of the groove;
placing the diaphragm into the recess;
plating a current collector layer on the surface of the lug production mold and the surface of the diaphragm, and then rolling the current collector layer to obtain a pole piece;
and the current collector layer on the surface of the lug pad protruding platform is used as a lug of the pole piece.
Optionally, the thickness of the membrane is 30-200 μm, and the width of the membrane is 50-2000 mm.
Optionally, the thickness of the current collector layer ranges from 1 to 20 μm.
The embodiment of the invention provides a pole piece, and the pole piece is prepared by the pole piece manufacturing method.
The battery provided by the embodiment of the invention comprises a positive pole piece, a negative pole piece, electrolyte and an isolating membrane, wherein the positive pole piece and the negative pole piece are the pole pieces.
According to the technical scheme, the embodiment of the invention has the following advantages:
in the pole piece manufacturing method of the embodiment, the current collector layer can be in close contact with the electrode active material, so that the contact internal resistance between the current collector layer and the electrode active material is greatly reduced, the heating of the battery can be reduced during quick charging, and the safety risk is reduced as much as possible.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a pole piece manufacturing method provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a pole piece provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a tab production mold related to a pole piece manufacturing method provided in an embodiment of the present invention;
fig. 4 is a sectional view showing an internal structure of a battery provided in an embodiment of the present invention;
illustration of the drawings: a membrane 1; a current collector layer 2; a tab production mold 3; a polar ear pad raised platform 4; a positive electrode plate 5; a negative pole piece 6; and a separator 7.
Detailed Description
The embodiment of the invention discloses a pole piece manufacturing method, a pole piece and a battery, which are used for solving the technical problems that the battery generates heat seriously during quick charge and is easy to cause safety risk because the contact internal resistance between a current collector of the conventional battery pole piece and an electrode active material is larger.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 to fig. 3, a method for manufacturing a pole piece provided in the present embodiment includes the following steps:
s1, stirring the binder, the electrode active material and the conductive agent to obtain mixed powder;
s2, rolling the mixed powder and pressing to a preset thickness to form a diaphragm, plating a current collector layer on one surface of the diaphragm, and rolling the current collector layer to obtain the pole piece.
In the pole piece manufacturing method of the embodiment, the current collector layer can be in close contact with the electrode active material, so that the contact internal resistance between the current collector layer and the electrode active material is greatly reduced, the heating of the battery can be reduced during quick charging, and the safety risk is reduced as much as possible. In addition, in the pole piece manufacturing method, the usage amount of the metal of the current collector layer can be reduced, and the energy density of the battery is increased.
Further, in step S1 of this embodiment, the binder, the electrode active material, and the conductive agent are uniformly mixed by high-speed stirring or ball milling, so as to obtain the mixed powder.
Further, the electrode active material in this embodiment is a positive electrode active material or a negative electrode active material;
the positive active material comprises one or more of nickel cobalt lithium manganate, lithium iron phosphate, lithium manganate, nickel cobalt aluminum, lithium cobaltate and lithium titanate;
the negative active material includes one or more of a graphite active material, a silicon carbon active material, or a silica active material.
It should be noted that the pole piece in this embodiment may be a positive pole piece or a negative pole piece, and when the pole piece is a positive pole piece, the electrode active material is a positive active material, and the specific component of the positive active material may be selected by a designer according to actual needs. When the pole piece is a negative pole piece, the electrode active material is a negative active material, and the specific composition of the negative active material can be selected by a designer according to actual needs.
Further, the conductive agent in this embodiment includes one or more of conductive carbon, carbon nanotubes, activated carbon, ketjen black, acetylene black, graphene, graphite flakes, graphite particles, carbon fibers, and intermediate carbon microspheres.
It should be noted that, the designer can select a suitable specific composition of the conductive agent according to the actual needs, and the embodiment is not limited to this.
Further, the binder in this embodiment includes one or more of polyvinylidene fluoride, polytetrafluoroethylene, sodium carboxymethyl cellulose, styrene-butadiene rubber, polyacrylic acid, polyvinyl alcohol, polyacrylate, silicone resin, epoxy resin, polyurethane, phenolic resin, polyimide resin, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer, and acrylonitrile multipolymer.
It should be noted that, the designer can select a suitable specific composition of the adhesive according to the actual needs, and the embodiment is not limited to this.
Further, the current collector layer in this embodiment is a copper metal layer or an aluminum metal layer plated on one of the surfaces of the membrane sheet by magnetron sputtering or vacuum evaporation.
It should be noted that magnetron sputtering or vacuum evaporation allows the current collector layer (copper metal layer or aluminum metal layer) to be in close contact with the electrode active material. In addition to the copper metal layer or the aluminum metal layer, the current collector layer in this embodiment may also be another metal material layer with high conductivity.
Further, as shown in fig. 3, step S2 in this embodiment specifically includes:
preparing a lug production mold, wherein the lug production mold is provided with a groove sunken into the lug production mold, and lug pad protruding platforms are arranged at two opposite ends of the groove;
placing the diaphragm into the groove, wherein the surface of the lug pad raised platform is 1-5 μm lower than the surface of the diaphragm;
plating a current collector layer on the surface of the lug production mold and the surface of the diaphragm, and then rolling the current collector layer to obtain a pole piece;
and the current collector layer on the surface of the lug pad protruding platform is used as a lug of the pole piece.
In addition, in the embodiment, a non-stick coating can be coated on the surface of the lug pad protruding platform, so that the lug can be easily separated from the surface of the lug pad protruding platform.
It should be noted that, with the adoption of the mode, the pole lug can be synchronously completed while the pole piece is completed, so that the step that the pole lug needs to be welded after the pole piece is manufactured in the traditional technology is reduced, and the production efficiency can be effectively improved.
Furthermore, the thickness range of the membrane in the embodiment is 30-200 μm, and the preferable thickness range is 50-120 μm;
the width of the film in this embodiment is 50-2000 mm.
Further, the thickness of the current collector layer in this embodiment is in the range of 1 to 20 μm, and preferably in the range of 2 to 8 μm.
Example two
Referring to fig. 2, in the present embodiment, a pole piece is provided, and specifically, the pole piece is manufactured by the pole piece manufacturing method in the first embodiment.
The pole piece of this embodiment, current collector layer and electrode active material in close contact with, greatly reduced the contact internal resistance between current collector layer and the electrode active material for the battery can reduce when filling soon and generate heat, reduces the safety risk as far as possible. In addition, the pole piece can also reduce the usage amount of the metal of the current collector layer and increase the energy density of the battery.
EXAMPLE III
Referring to fig. 2 and 4, the battery provided in the present embodiment includes a positive electrode plate, a negative electrode plate, an electrolyte and a separator, wherein the positive electrode plate and the negative electrode plate are the electrode plates described in the second embodiment.
The battery in this embodiment will be described with a specific manufacturing process, which is as follows:
preparing a positive pole piece: stirring and mixing the positive electrode active material, the conductive agent and the binder according to the mass ratio of 97:2:1, and stirring the mixture under the action of a vacuum stirrer until the system is uniform to obtain mixed positive electrode powder; and rolling the positive electrode powder into a positive electrode diaphragm through a rolling machine, plating a current collector layer on one surface of the positive electrode diaphragm, and then performing cold pressing and slitting to obtain the single-diaphragm positive electrode piece.
Preparing a negative pole piece: stirring and mixing the negative electrode active material, the conductive agent and the binder according to the mass ratio of 96:3:1, and stirring the mixture under the action of a vacuum stirrer until the system is uniform to obtain mixed negative electrode powder; and rolling the negative electrode split body into a negative electrode diaphragm through a rolling machine, plating a current collector layer on one surface of the negative electrode diaphragm, and then performing cold pressing and slitting to obtain the negative electrode piece of the single diaphragm.
Preparing an electrolyte: ethylene Carbonate (EC), Ethyl Methyl Carbonate (EMC), and diethyl carbonate (DEC) were mixed at a volume ratio of 1:1:1 to obtain an organic solvent, and then a sufficiently dried lithium salt LiPF6 was dissolved in the mixed organic solvent to prepare an electrolyte solution having a concentration of 1 mol/L.
Preparing an isolating membrane: polyethylene film was selected as the barrier film.
Preparing a winding type rechargeable battery: die-cutting the positive pole pieces of the two single diaphragms, the isolating membrane and the negative pole pieces of the two single diaphragms into proper sizes, stacking the positive pole pieces and the isolating membrane in sequence to enable the isolating membrane to be positioned between the positive pole pieces and the negative pole pieces to play an isolating role, and then winding and hot-pressing the isolating membrane to obtain a bare cell; and placing the bare cell in an outer packaging shell, drying, injecting electrolyte, performing vacuum packaging, standing, forming and other processes to obtain the winding type rechargeable battery.
Preparing a laminated lithium ion battery: cutting the positive pole pieces of the two single diaphragms, the isolating membrane and the negative pole pieces of the two single diaphragms into proper sizes, stacking the positive pole pieces, the isolating membrane and the negative pole pieces in sequence to enable the isolating membrane to be positioned between the positive pole pieces and the negative pole pieces to play an isolating role, and then carrying out hot pressing to obtain a bare cell; and placing the bare cell in an outer packaging shell, drying, injecting electrolyte, and performing vacuum packaging, standing, formation and other processes to obtain the laminated rechargeable battery.
In the above process of manufacturing a wound or laminated battery, as shown in fig. 4, the current collector layers of two electrode sheets with the same polarity and single membrane surface are bonded together to form a complete electrode sheet. The current collector layers in the positive pole pieces of the two single diaphragms are mutually attached to form a complete positive pole piece, and the current collector layers in the negative pole pieces of the two single diaphragms are mutually attached to form a complete negative pole piece. Of course, in the above-mentioned process of manufacturing a wound or laminated battery, a single-piece single-diaphragm positive electrode plate and a single-piece single-diaphragm negative electrode plate may also be directly adopted, specifically, in this case, the positive electrode diaphragm of the positive electrode plate is attached to one side surface of the isolation film, and the negative electrode diaphragm of the negative electrode plate is attached to the other side surface of the isolation film.
In summary, the present disclosure should not be construed as limiting the invention, and the embodiments and the application scope of the invention are not limited to the above embodiments.
Claims (10)
1. A pole piece manufacturing method is characterized by comprising the following steps:
s1, stirring the binder, the electrode active material and the conductive agent to obtain mixed powder;
s2, rolling the mixed powder and pressing to a preset thickness to form a diaphragm, plating a current collector layer on one surface of the diaphragm, and rolling the current collector layer to obtain the pole piece.
2. The manufacturing method of the pole piece according to claim 1, wherein the electrode active material is a positive electrode active material or a negative electrode active material;
the positive active material comprises one or more of nickel cobalt lithium manganate, lithium iron phosphate, lithium manganate, nickel cobalt aluminum, lithium cobaltate and lithium titanate;
the negative active material includes one or more of a graphite active material, a silicon carbon active material, or a silica active material.
3. The method for manufacturing a pole piece according to claim 1, wherein the conductive agent comprises one or more of conductive carbon, carbon nanotubes, activated carbon, ketjen black, acetylene black, graphene, graphite flakes, graphite particles, carbon fibers and intermediate carbon microspheres.
4. The method for manufacturing the pole piece according to claim 1, wherein the binder comprises one or more of polyvinylidene fluoride, polytetrafluoroethylene, sodium carboxymethyl cellulose, styrene-butadiene rubber, polyacrylic acid, polyvinyl alcohol, polyacrylate, silicone resin, epoxy resin, polyurethane, phenolic resin, polyimide resin, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer and acrylonitrile multipolymer.
5. The manufacturing method of the pole piece according to claim 1, wherein the current collector layer is a copper metal layer or an aluminum metal layer plated on one surface of the membrane sheet by means of magnetron sputtering or vacuum evaporation.
6. The pole piece manufacturing method according to claim 1, wherein the step S2 specifically includes:
preparing a lug production mold, wherein the lug production mold is provided with a groove sunken into the lug production mold, and lug pad protruding platforms are arranged at two opposite ends of the groove;
placing the diaphragm into the recess;
plating a current collector layer on the surface of the lug production mold and the surface of the diaphragm, and then rolling the current collector layer to obtain a pole piece;
and the current collector layer on the surface of the lug pad protruding platform is used as a lug of the pole piece.
7. The method for manufacturing the pole piece according to claim 1, wherein the thickness of the membrane is 30-200 μm, and the width of the membrane is 50-2000 mm.
8. The method for manufacturing the pole piece according to claim 1, wherein the thickness of the current collector layer is 1-20 μm.
9. A pole piece produced by the method of any one of claims 1 to 8.
10. A battery comprising a positive electrode tab, a negative electrode tab, an electrolyte and a separator, wherein the positive electrode tab and the negative electrode tab are the tabs of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210647376.6A CN114843453A (en) | 2022-06-09 | 2022-06-09 | Pole piece manufacturing method, pole piece and battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210647376.6A CN114843453A (en) | 2022-06-09 | 2022-06-09 | Pole piece manufacturing method, pole piece and battery |
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| CN114843453A true CN114843453A (en) | 2022-08-02 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05314984A (en) * | 1992-05-12 | 1993-11-26 | Yuasa Corp | Current collector body for battery |
| CN201081817Y (en) * | 2007-02-09 | 2008-07-02 | 惠州Tcl金能电池有限公司 | Pole plate of coiling lithium cell core |
| CN112126103A (en) * | 2020-08-24 | 2020-12-25 | 浙江长宇新材料有限公司 | Metal evaporation composite nano cellulose membrane current collector and preparation method thereof |
| CN112563447A (en) * | 2020-12-08 | 2021-03-26 | 合肥国轩高科动力能源有限公司 | High-energy-density pole piece and preparation method thereof |
| CN113659104A (en) * | 2021-08-11 | 2021-11-16 | 蜂巢能源科技(无锡)有限公司 | Preparation method of battery active layer, battery pole piece and application |
| CN113690427A (en) * | 2021-08-24 | 2021-11-23 | 蜂巢能源科技(无锡)有限公司 | Preparation method of lithium-silicon alloy pole piece, lithium-silicon alloy pole piece and lithium battery |
-
2022
- 2022-06-09 CN CN202210647376.6A patent/CN114843453A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05314984A (en) * | 1992-05-12 | 1993-11-26 | Yuasa Corp | Current collector body for battery |
| CN201081817Y (en) * | 2007-02-09 | 2008-07-02 | 惠州Tcl金能电池有限公司 | Pole plate of coiling lithium cell core |
| CN112126103A (en) * | 2020-08-24 | 2020-12-25 | 浙江长宇新材料有限公司 | Metal evaporation composite nano cellulose membrane current collector and preparation method thereof |
| CN112563447A (en) * | 2020-12-08 | 2021-03-26 | 合肥国轩高科动力能源有限公司 | High-energy-density pole piece and preparation method thereof |
| CN113659104A (en) * | 2021-08-11 | 2021-11-16 | 蜂巢能源科技(无锡)有限公司 | Preparation method of battery active layer, battery pole piece and application |
| CN113690427A (en) * | 2021-08-24 | 2021-11-23 | 蜂巢能源科技(无锡)有限公司 | Preparation method of lithium-silicon alloy pole piece, lithium-silicon alloy pole piece and lithium battery |
Non-Patent Citations (1)
| Title |
|---|
| J.BUSOM ETAL: "Sputtering of sub-micrometer aluminum layers as compact, highperformance, light-weight current collector for supercapacitors", JOURNAL OF POWER SOURCES, vol. 329, pages 432 - 440 * |
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