Artificial graphite cathode aluminum plastic film
By installing an antioxidant layer, an anti-corrosion layer and a nano-scale alumina coating on the artificial graphite negative electrode aluminum-plastic film, and using specific adhesives, the problem of electrode structure damage caused by volume changes during charging and discharging of traditional graphite negative electrode materials is solved, and higher battery performance and service life are achieved.
Patent Information
- Application Number
- CN202421702159.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-18
AI Technical Summary
Traditional artificial graphite negative electrode materials are prone to volume expansion and contraction during charging and discharging, resulting in damage to the electrode structure and degradation of performance.
An artificial graphite negative electrode aluminum-plastic film is used, and the solid bonding of each layer of materials is ensured by providing an antioxidant layer, an anti-corrosion layer and a nano-scale aluminum oxide coating on the aluminum-plastic film, and using polyacrylate, polyurethane or epoxy resin as the adhesive.
It improves the oxidation, corrosion and heat resistance of aluminum-plastic film, enhances compatibility with the negative electrode material, extends the service life of the battery, avoids damage to the electrode structure, and ensures the integrity and stability of the aluminum-plastic film.
Smart Images
Figure CN222826425U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of artificial graphite negative electrode, in particular to an artificial graphite negative electrode aluminum-plastic film. Background Art
[0002] With the widespread application of lithium-ion batteries in electric vehicles, energy storage systems and other fields, higher requirements are placed on the performance and safety of batteries. As an important component of lithium-ion batteries, the performance of artificial graphite anode directly affects the cycle life, energy density and safety of the battery. However, traditional artificial graphite anode materials are prone to volume expansion and contraction during the charging and discharging process, resulting in damage to the electrode structure and performance degradation. Therefore, we have launched an artificial graphite anode aluminum-plastic film. Utility Model Content
[0003] The main purpose of the utility model is to provide an artificial graphite negative electrode aluminum-plastic film, which can effectively solve the problems in the background technology.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] An artificial graphite negative electrode aluminum-plastic film includes an outer layer, characterized in that: the rear end of the outer layer is connected to an anti-oxidation layer by adhesive, the rear end of the anti-oxidation layer is connected to an anti-corrosion layer by adhesive, the rear end of the anti-corrosion layer is connected to a nano-scale aluminum oxide coating by adhesive, the rear end of the nano-scale aluminum oxide coating is connected to an intermediate layer by adhesive, and the rear end of the intermediate layer is connected to an inner layer by adhesive.
[0006] Preferably, the outer layer, the middle layer and the inner layer are of the same size.
[0007] Preferably, the outer layer and the inner layer are both made of polypropylene or polyethylene.
[0008] Preferably, the anti-oxidation layer and the anti-corrosion layer are both coated with a coating that improves compatibility with the negative electrode material.
[0009] Preferably, the adhesive is made of polyacrylate, polyurethane or epoxy resin.
[0010] Preferably, the combined thickness of the outer layer, the anti-oxidation layer, the anti-corrosion layer, the nano-aluminum oxide coating, the intermediate layer and the inner layer is 50-150 μm.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] 1. By setting the anti-oxidation layer and the anti-corrosion layer, the anti-oxidation and anti-corrosion capabilities of the aluminum-plastic film are improved, and the service life of the battery is extended;
[0013] 2. By setting a nano-level alumina coating, the heat resistance and insulation of the aluminum-plastic film are improved, while the compatibility with the negative electrode material is enhanced, thereby improving the performance of the battery;
[0014] 3. Using polyacrylate, polyurethane or epoxy resin as adhesive improves the bonding strength between layers and ensures the integrity of the aluminum-plastic film;
[0015] 4. By controlling the thickness of the outer layer, anti-oxidation layer, anti-corrosion layer, nano-aluminum oxide coating, middle layer and inner layer, the aluminum-plastic film has good flexibility and mechanical strength and can adapt to different usage environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of an artificial graphite negative electrode aluminum-plastic film of the utility model;
[0017] Figure 2 This is a structural breakdown diagram of the outer layer, anti-oxidation layer, anti-corrosion layer, nano-scale aluminum oxide coating, middle layer and inner layer of an artificial graphite negative electrode aluminum-plastic film of the utility model.
[0018] In the figure: 1, outer layer; 2, anti-oxidation layer; 3, anti-corrosion layer; 4, nano-aluminum oxide coating; 5, middle layer; 6, inner layer. DETAILED DESCRIPTION
[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] See also Figure 1-2 , the utility model provides a technical solution:
[0023] An artificial graphite negative electrode aluminum-plastic film comprises an outer layer 1, a rear end of the outer layer 1 is connected to an anti-oxidation layer 2 by adhesive, a rear end of the anti-oxidation layer 2 is connected to an anti-corrosion layer 3 by adhesive, a rear end of the anti-corrosion layer 3 is connected to a nano-alumina coating 4 by adhesive, a rear end of the nano-alumina coating 4 is connected to an intermediate layer 5 by adhesive, and a rear end of the intermediate layer 5 is connected to an inner layer 6 by adhesive.
[0024] In this embodiment, the outer layer 1, the middle layer 5 and the inner layer 6 are of the same size, the middle layer 5 is set to aluminum foil, the aluminum foil provides excellent barrier properties and conductivity, and the surface of the middle layer 5 is treated, such as anodizing and chemical plating, to improve its compatibility and adhesion with the negative electrode material; the outer layer 1 and the inner layer 6 are both made of polypropylene or polyethylene; the anti-oxidation layer 2 and the anti-corrosion layer 3 are both coated with coatings that improve compatibility with the negative electrode material, and the anti-oxidation layer 2 and the anti-corrosion layer 3 can improve the performance and stability of the aluminum-plastic film; the adhesive is made of polyacrylate, polyurethane or epoxy resin, and the adhesive of polyacrylate, polyurethane or epoxy resin firmly bonds the various layers of materials together, ensuring the integrity and stability of the aluminum-plastic film; the combined thickness of the outer layer 1, the anti-oxidation layer 2, the anti-corrosion layer 3, the nano-aluminum oxide coating 4, the middle layer 5 and the inner layer 6 is 50-150μm.
[0025] It should be noted that the utility model is an artificial graphite negative electrode aluminum-plastic film. During use, it is first bonded to the negative electrode material. When the battery is charged, the current is conducted to the negative electrode material through the intermediate layer 5. At the same time, the nano-aluminum oxide coating 4 plays an insulating and heat-resistant role to prevent current leakage and overheating. When the battery is discharged, the negative electrode material expands and contracts, and the flexibility of the aluminum-plastic film can adapt to such changes, avoiding damage to the electrode structure. The anti-oxidation layer 2 and the anti-corrosion layer 3 can protect the aluminum foil intermediate layer 5 from the influence of the external environment, thereby extending the service life of the aluminum-plastic film. Adhesives such as polyacrylate, polyurethane or epoxy resin firmly bond the various layers of materials together, thereby ensuring the integrity and stability of the aluminum-plastic film.
[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. An artificial graphite negative electrode aluminum-plastic film, comprising an outer layer (1), characterized in that: The rear end of the outer layer (1) is connected to the anti-oxidation layer (2) by adhesive, the rear end of the anti-oxidation layer (2) is connected to the anti-corrosion layer (3) by adhesive, the rear end of the anti-corrosion layer (3) is connected to the nano-scale aluminum oxide coating (4) by adhesive, the rear end of the nano-scale aluminum oxide coating (4) is connected to the middle layer (5) by adhesive, and the rear end of the middle layer (5) is connected to the inner layer (6) by adhesive.
2. The artificial graphite negative electrode aluminum-plastic film according to claim 1, characterized in that: The outer layer (1), the middle layer (5) and the inner layer (6) are of the same size.
3. The artificial graphite negative electrode aluminum-plastic film according to claim 1, characterized in that: The outer layer (1) and the inner layer (6) are both made of polypropylene or polyethylene.
4. The artificial graphite negative electrode aluminum-plastic film according to claim 1, characterized in that: The anti-oxidation layer (2) and the anti-corrosion layer (3) are both coatings that improve compatibility with negative electrode materials.
5. The artificial graphite negative electrode aluminum-plastic film according to claim 1, characterized in that: The adhesive is polyacrylate, polyurethane or epoxy resin.
6. The artificial graphite negative electrode aluminum-plastic film according to claim 1, characterized in that: The combined thickness of the outer layer (1), the anti-oxidation layer (2), the anti-corrosion layer (3), the nano-scale aluminum oxide coating (4), the middle layer (5) and the inner layer (6) is 50-150 μm.