CN116706078A - Novel lithium battery negative electrode current collector and manufacturing method thereof - Google Patents
Novel lithium battery negative electrode current collector and manufacturing method thereof Download PDFInfo
- Publication number
- CN116706078A CN116706078A CN202210180765.2A CN202210180765A CN116706078A CN 116706078 A CN116706078 A CN 116706078A CN 202210180765 A CN202210180765 A CN 202210180765A CN 116706078 A CN116706078 A CN 116706078A
- Authority
- CN
- China
- Prior art keywords
- current collector
- plastic film
- lithium battery
- negative electrode
- electrode current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000010410 layer Substances 0.000 claims abstract description 48
- 239000002985 plastic film Substances 0.000 claims abstract description 35
- 229920006255 plastic film Polymers 0.000 claims abstract description 35
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052802 copper Inorganic materials 0.000 claims abstract description 27
- 239000010949 copper Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 24
- 239000011241 protective layer Substances 0.000 claims abstract description 21
- 238000005516 engineering process Methods 0.000 claims abstract description 20
- 238000001755 magnetron sputter deposition Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 238000007747 plating Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000011229 interlayer Substances 0.000 abstract description 2
- 239000011889 copper foil Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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 application discloses a novel lithium battery negative electrode current collector and a manufacturing method thereof, wherein the current collector comprises a plastic film, and a prefabricated bonding layer, a copper metal layer and a protective layer which are arranged on the front side and the back side of the plastic film, the protective layer is an ITO film, and the manufacturing method of the current collector adopts a magnetron sputtering coating technology to form a required film. The novel lithium battery negative electrode current collector has the advantages of simple manufacturing flow, high film density, good consistency, few impurities, good film interlayer binding force and high quality, the manufactured current collector can not have the problem of falling off, and the ITO film protective layer can prevent the copper metal layer from being oxidized and maintain good conductive performance, thereby being beneficial to improving the performance of the battery.
Description
Technical Field
The application relates to the field of lithium ion batteries, in particular to a novel lithium battery negative electrode current collector and a manufacturing method thereof.
Background
For lithium ion batteries, the commonly used negative current collector is copper foil. The copper foil has good conductivity, soft texture and mature manufacturing process, and is selected as the main material of the lithium battery current collector. With the continuous development of lithium battery technology, both lithium batteries for digital products and batteries for electric automobiles hope that the energy density of the batteries is as high as possible, the weight of the batteries is lighter and lighter, and the thickness of the thin copper foil can be reduced to provide higher energy density, reduce the weight of the batteries and reduce the cost of raw materials of the copper foil. However, the copper foil is reduced in mechanical strength and is easily broken during processing. In order to realize the requirements of thinning and reducing the cost, the prior art adopts an electroplated copper foil to replace the traditional copper foil, but the electroplated copper not only pollutes the environment, but also can easily fall off a copper plating layer with a certain thickness. Meanwhile, the copper surface is easily oxidized to lower the conductivity, thereby affecting the performance of the battery.
Disclosure of Invention
Aiming at the problems, the application provides a novel lithium battery negative electrode current collector and a manufacturing method thereof, and the current collector is coated in a vacuum environment by utilizing a magnetron sputtering coating technology, so that the current collector has good combination without falling off and has good oxidation resistance.
In order to solve the technical problem, the novel lithium battery negative electrode current collector provided by the application is characterized by comprising the following components: the plastic film, and the prefabricated bonding layer, the copper metal layer and the protective layer which are arranged on the front side and the back side of the plastic film, wherein the protective layer is an ITO film.
Further, the thickness of the copper metal layer is 300-1500nm.
Further, the thickness of the ITO film is 5-20nm.
Further, the plastic film is made of any one of PP, PET, PI.
Further, the thickness of the plastic film is 2-20um.
Further, the material of the prefabricated bonding layer is any one of nickel, nickel copper, titanium and silicon.
Further, the thickness of the prefabricated bonding layer is 2-10nm.
The application also provides a manufacturing method of the novel lithium battery negative electrode current collector, which comprises the following steps:
providing a plastic film;
one surface of the plastic film is plated with a prefabricated bonding layer, a copper metal layer and an ITO protective layer in sequence through a magnetron sputtering coating technology;
and plating a prefabricated bonding layer, a copper metal layer and an ITO protective layer on the other surface of the plastic film in sequence through a magnetron sputtering coating technology.
The application also provides a manufacturing method of the novel lithium battery negative electrode current collector, which comprises the following steps:
providing a plastic film;
plating prefabricated bonding layers on the front side and the back side of the plastic film respectively through a magnetron sputtering coating technology;
plating copper metal layers on the prefabricated bonding layers on the front and back sides of the plastic film respectively through a magnetron sputtering coating technology;
ITO protective layers are respectively plated on the front and back copper metal layers of the plastic film through a magnetron sputtering coating technology.
The application has the beneficial effects that:
(1) The film is continuously formed in a vacuum environment by utilizing a vacuum magnetron sputtering coating technology, the density of the film is high, the consistency is good, the impurity is few, the bonding force between film layers is good, the quality is high, and the manufactured current collector cannot fall off;
(2) An ITO protective layer is formed on the copper metal film through magnetron sputtering, so that the oxidation of the copper metal layer can be prevented, and the influence on the conductivity can be reduced;
in conclusion, the novel lithium battery cathode current collector has the advantages of simple manufacturing process, high film density, good consistency, few impurities, good film interlayer binding force and high quality, the manufactured current collector cannot fall off, and the ITO film protective layer can prevent the copper metal layer from being oxidized and maintain good conductivity, so that the performance of the battery is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 is a schematic diagram of a novel negative current collector structure of a lithium battery provided by the application;
FIG. 2 is a flow chart of a novel negative current collector of a lithium battery;
FIG. 3 is a flow chart of another novel lithium battery negative electrode current collector provided by the application;
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
As shown in fig. 1, the novel lithium battery negative electrode current collector provided by the application comprises: the plastic film 10, the prefabricated bonding layer 20, the copper metal layer 30 and the protective layer 40 are arranged on the front side and the back side of the plastic film. The protective layer 40 is an ITO film; the thickness of the ITO film is 5-20nm; the thickness of the copper metal layer is 300-1500nm; the plastic film is made of any one of PP, PET, PI; the thickness of the plastic film is 2-20um; the prefabricated bonding layer is made of any one of nickel, nickel copper, titanium and silicon; the thickness of the prefabricated bonding layer is 2-10nm;
as shown in fig. 2, the present application further provides a method for manufacturing a novel negative current collector of a lithium battery, including:
providing a plastic film; any one of the materials is PP, PET, PI, which can be a smooth surface or can be made into a rough surface by the prior art method; the thickness is 2-20um;
one surface of the plastic film is plated with a prefabricated bonding layer of 2-10nm, a copper metal layer of 300-1500nm and an ITO protective layer of 5-20nm in sequence by a magnetron sputtering coating technology;
sequentially plating a prefabricated bonding layer of 2-10nm, a copper metal layer of 300-1500nm and an ITO protective layer of 5-20nm on the other surface of the plastic film by a magnetron sputtering coating technology;
as shown in fig. 3, the present application further provides a method for manufacturing a novel negative current collector of a lithium battery, which includes:
providing a plastic film; any one of the materials is PP, PET, PI, which can be a smooth surface or can be made into a rough surface by the prior art method; the thickness is 2-20um;
respectively plating prefabricated bonding layers of 2-10nm on the front side and the back side of the plastic film by a magnetron sputtering coating technology;
plating copper metal layers with a thickness of 300-1500nm on the prefabricated bonding layers on the front and back sides of the plastic film respectively through a magnetron sputtering coating technology;
respectively plating ITO protective layers on the front and back copper metal layers of the plastic film by a magnetron sputtering coating technology for 5-20nm;
the film is continuously formed in a vacuum environment by utilizing a vacuum magnetron sputtering film plating technology, the density of the film is high, the consistency is good, the impurity is few, the bonding force between film layers is good, the quality is high, the manufactured current collector cannot fall off, the oxidation of a copper metal layer can be prevented through an ITO film protective layer, and good conductivity is maintained, so that the performance of a battery is improved. Meanwhile, the process flow is simple, and the problem of environmental pollution caused by using an electroplating process is avoided.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (9)
1. The utility model provides a novel lithium cell negative pole current collector which characterized in that: the current collector includes: the plastic film, and the prefabricated bonding layer, the copper metal layer and the protective layer which are arranged on the front side and the back side of the plastic film, wherein the protective layer is an ITO film.
2. The novel lithium battery negative electrode current collector of claim 1, further characterized by: the thickness of the copper metal layer is 300-1500nm.
3. The novel lithium battery negative electrode current collector of claim 1, further characterized by: the thickness of the ITO film is 5-20nm.
4. The novel lithium battery negative electrode current collector of claim 1, further characterized by: the plastic film is made of any one of PP, PET, PI.
5. The novel lithium battery negative electrode current collector of claim 1, further characterized by: the thickness of the plastic film is 2-20um.
6. The novel lithium battery negative electrode current collector of claim 1, further characterized by: the prefabricated bonding layer is made of any one of nickel, nickel copper, titanium and silicon.
7. The novel lithium battery negative electrode current collector of claim 1, further characterized by: the thickness of the prefabricated bonding layer is 2-10nm.
8. The method for manufacturing a novel lithium battery negative electrode current collector according to claim 1, further characterized by:
providing a plastic film;
one surface of the plastic film is plated with a prefabricated bonding layer, a copper metal layer and an ITO protective layer in sequence through a magnetron sputtering coating technology;
and plating a prefabricated bonding layer, a copper metal layer and an ITO protective layer on the other surface of the plastic film in sequence through a magnetron sputtering coating technology.
9. The method for manufacturing a novel lithium battery negative electrode current collector according to claim 1, further characterized by:
providing a plastic film;
plating prefabricated bonding layers on the front side and the back side of the plastic film respectively through a magnetron sputtering coating technology;
plating copper metal layers on the prefabricated bonding layers on the front and back sides of the plastic film respectively through a magnetron sputtering coating technology;
ITO protective layers are respectively plated on the front and back copper metal layers of the plastic film through a magnetron sputtering coating technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210180765.2A CN116706078A (en) | 2022-02-25 | 2022-02-25 | Novel lithium battery negative electrode current collector and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210180765.2A CN116706078A (en) | 2022-02-25 | 2022-02-25 | Novel lithium battery negative electrode current collector and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116706078A true CN116706078A (en) | 2023-09-05 |
Family
ID=87826262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210180765.2A Pending CN116706078A (en) | 2022-02-25 | 2022-02-25 | Novel lithium battery negative electrode current collector and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116706078A (en) |
-
2022
- 2022-02-25 CN CN202210180765.2A patent/CN116706078A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8709663B2 (en) | Current collector for lead acid battery | |
| KR101229903B1 (en) | Negative electrode active material, negative electrode and lithium secondary battery | |
| CN107369810A (en) | A kind of negative current collector, its preparation method and its application | |
| CN111224115B (en) | Zinc-based battery negative electrode and preparation and application thereof | |
| CN207097950U (en) | A kind of lithium battery containing new current collector | |
| JP2005505102A (en) | Current collector structure and method for improving the performance of lead acid batteries | |
| CN114759192B (en) | Layered composite conductive material, preparation process and current collector | |
| WO2023245960A1 (en) | Lithium-magnesium composite negative electrode and preparation method therefor, and lithium-sulfur battery and all-solid-state battery prepared therefrom | |
| US20110262813A1 (en) | Method of producing current collectors for electrochemical devices | |
| CN115275213A (en) | Composite current collector for lithium battery cathode and preparation method and application thereof | |
| JP4438541B2 (en) | Composite foil for negative electrode current collector of non-aqueous electrolyte secondary battery and manufacturing method thereof, and negative electrode current collector, non-aqueous electrolyte secondary battery electrode and non-aqueous electrolyte secondary battery using the composite foil | |
| CN114188543A (en) | Composite conductive copper foil and preparation method thereof | |
| CN116706078A (en) | Novel lithium battery negative electrode current collector and manufacturing method thereof | |
| CN110350146B (en) | Modified three-dimensional porous antimony electrode, preparation method and application | |
| CN217009232U (en) | Novel lithium battery negative current collector structure | |
| CN114430044B (en) | Bipolar current collector, preparation method thereof and battery | |
| CN213150817U (en) | Copper current collector | |
| CN111710831A (en) | Solid-state battery negative electrode foil and production process thereof | |
| CN217009233U (en) | Lithium battery composite current collector | |
| CN214588910U (en) | High-conductivity lithium battery electrode plate, lithium battery and electronic equipment | |
| CN219610484U (en) | Composite copper current collector | |
| CN212365997U (en) | Current collector and lithium ion battery cell | |
| CN111682218A (en) | Enhanced carbon-containing material current collector and preparation method thereof | |
| CN220774417U (en) | Novel composite film current collector and battery | |
| CN213692113U (en) | Negative plate of cobalt-nickel bimetallic oxide loaded graphene |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |