Battery encapsulation film and battery
By employing a multi-layer structure in the battery encapsulation film, combining an inorganic barrier layer, an organic polymer layer, and zeolite nanoparticles, the stability problem of sulfide solid electrolytes in water and oxygen environments is solved, achieving more efficient water and oxygen barrier and battery safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HANKE NEW MATERIAL TECH CO LTD
- Filing Date
- 2026-03-11
- Publication Date
- 2026-05-26
AI Technical Summary
Sulfide solid electrolytes have poor stability in water and oxygen environments and are prone to reacting with water and oxygen. Traditional battery packaging materials such as aluminum-plastic films have limited water and oxygen barrier capabilities and are prone to causing battery short circuits.
The battery encapsulation film employs a multi-layer structure, including a substrate layer, an inorganic barrier layer, an organic polymer barrier layer, and a composite barrier layer. It utilizes the high density of the inorganic barrier layer, the filling capacity of the organic polymer layer, and the three-dimensional porous structure of zeolite nanoparticles in the composite barrier layer to enhance water and oxygen barrier performance.
It significantly improves the water and oxygen barrier properties of the battery encapsulation film, reduces the penetration of water vapor and oxygen, prevents battery short circuits, and enhances battery safety and stability.
Smart Images
Figure CN224288367U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery packaging technology, and in particular to battery encapsulation films and batteries. Background Technology
[0002] Sulfide solid electrolytes possess lithium-ion conductivity comparable to that of liquid electrolytes, making them a core material for next-generation high-energy-density solid-state batteries. However, sulfide solid electrolytes exhibit extremely poor stability in water-oxygen environments, readily reacting with water and oxygen, causing structural damage and generating the toxic gas hydrogen sulfide (H2S). Traditional battery encapsulation uses aluminum-plastic films, relying primarily on an intermediate aluminum layer to block water and oxygen; however, this barrier capability is limited by the density of the aluminum layer. Furthermore, aluminum is conductive; if the aluminum-plastic film is accidentally punctured, the resulting burrs can easily trigger an internal short circuit in the battery upon contact with the electrodes. Utility Model Content
[0003] Therefore, it is necessary to provide a battery encapsulation film and a battery to improve the water and oxygen barrier performance of the battery encapsulation film.
[0004] A battery encapsulation film includes a substrate layer, an inorganic barrier layer, an organic polymer barrier layer, and a composite barrier layer stacked sequentially, wherein the composite barrier layer includes a polymer matrix and zeolite nanoparticles dispersed in the polymer matrix.
[0005] In one embodiment, the substrate layer includes one or more of ETFE, PTFE, and ePTFE layers. When the substrate layer includes multiple layers of the above-mentioned layers, the multiple layers are stacked together.
[0006] In one embodiment, the organic polymer barrier layer includes one or more layers of polyurethane, acrylic, and polyacrylic acid. When the organic polymer barrier layer includes multiple layers of the above-mentioned layers, the multiple layers are stacked together.
[0007] In one embodiment, the inorganic barrier layer includes a plurality of stacked sublayers, wherein the plurality of sublayers are at least four layers selected from SiO2 layer, Al2O3 layer, TiO2 layer, ZrO2 layer, HfO2 layer, ZnO layer, Ta2O5 layer, CeO2 layer, Nb2O5 layer, ZnS layer and Si3N4 layer.
[0008] In one embodiment, the thickness of each sublayer in the inorganic barrier layer is 10nm~50nm, the thickness of the organic polymer barrier layer is 0.5µm~2µm, and the thickness of the composite barrier layer is 0.5µm~2µm.
[0009] In one embodiment, the zeolite nanoparticles have a particle size of 10 nm to 200 nm.
[0010] In one embodiment, the battery encapsulation film further includes a scratch-resistant protective layer disposed on the side of the substrate layer away from the inorganic barrier layer. The scratch-resistant protective layer includes one or more of the DLC layer and the AF layer. When the scratch-resistant protective layer includes multiple layers of the above-mentioned layers, the multiple layers are stacked.
[0011] In one embodiment, the battery encapsulation film further includes a heat-sealing layer disposed on the side of the composite barrier layer away from the organic polymer barrier layer. The heat-sealing layer is one or more of CPP and PP layers. When the heat-sealing layer includes multiple layers of the above-mentioned layers, the multiple layers are stacked together.
[0012] In one embodiment, the battery encapsulation film further includes an adhesive layer disposed between the composite barrier layer and the heat-sealing layer.
[0013] A battery includes a battery body and a battery encapsulation film as described in any of the above embodiments, wherein the battery encapsulation film encapsulates the battery body.
[0014] Compared with traditional solutions, the above-mentioned battery encapsulation film and battery have the following advantages:
[0015] The aforementioned battery encapsulation film comprises an inorganic barrier layer, an organic polymer barrier layer, and a composite barrier layer sequentially disposed on a substrate layer. The inorganic barrier layer exhibits high density and excellent water and oxygen barrier performance. The organic polymer barrier layer fills the microscopic pinholes and cracks on the surface of the inorganic barrier layer, blocking the permeation path of water vapor or oxygen through microchannels, further enhancing the barrier capability. The composite barrier layer includes a polymer matrix and zeolite nanoparticles dispersed therein. The polymer matrix blocks water and oxygen, while the zeolite nanoparticles possess a three-dimensional porous structure capable of adsorbing water and oxygen. Through the multifaceted effects and synergy of each layer, the water and oxygen barrier performance of the battery encapsulation film is effectively improved.
[0016] The battery described above has the battery encapsulation film of any of the above embodiments, and therefore has the corresponding technical features and can obtain the corresponding beneficial effects. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of a battery encapsulation film according to an embodiment of this application.
[0018] Explanation of reference numerals in the attached figures:
[0019] 100. Battery encapsulation film; 110. Substrate layer; 120. Inorganic barrier layer; 121. First sublayer; 122. Second sublayer; 123. Third sublayer; 124. Fourth sublayer; 130. Organic polymer barrier layer; 140. Composite barrier layer; 150. Scratch-resistant protective layer; 160. Heat-sealing layer; 170. Adhesive layer; 180. Hardened primer layer. Detailed Implementation
[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0021] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0025] like Figure 1 As shown, a battery encapsulation film 100 in one embodiment includes a substrate layer 110, an inorganic barrier layer 120, an organic polymer barrier layer 130, and a composite barrier layer 140 stacked sequentially. The composite barrier layer 140 includes a polymer matrix and zeolite nanoparticles dispersed within the polymer matrix.
[0026] The aforementioned battery encapsulation film 100 comprises, sequentially on a substrate layer 110, an inorganic barrier layer 120, an organic polymer barrier layer 130, and a composite barrier layer 140. The inorganic barrier layer 120 exhibits high density and excellent water and oxygen barrier performance. The organic polymer barrier layer 130 fills the microscopic pinholes and cracks on the surface of the inorganic barrier layer 120, blocking the permeation path of water vapor or oxygen through microchannels, further enhancing the barrier capability. The composite barrier layer 140 comprises a polymer matrix and zeolite nanoparticles dispersed therein. The polymer matrix blocks water and oxygen, while the zeolite nanoparticles possess a three-dimensional porous structure capable of adsorbing water and oxygen. Through the multifaceted effects and synergy of each layer, the water and oxygen barrier performance of the battery encapsulation film 100 is effectively improved.
[0027] In some examples, the substrate layer 110 includes one or more layers of ETFE (ethylene-tetrafluoroethylene copolymer), PTFE (polytetrafluoroethylene), and ePTFE (expanded polytetrafluoroethylene). When the substrate layer 110 includes multiple layers of the above-mentioned layers, the multiple layers are stacked. For example, the substrate layer 110 is a stack of ETFE and PTFE layers. The substrate layer 110 itself has good hydrophobicity, which can improve the water and oxygen resistance of the battery encapsulation film 100.
[0028] In some examples, the thickness of the substrate layer 110 is 10µm to 200µm. Further, in some examples, the thickness of the substrate layer 110 is 50µm to 150µm. In some specific examples, the thickness of the substrate layer 110 is 10µm, 20µm, 40µm, 60µm, 80µm, 100µm, 120µm, 140µm, 160µm, 180µm, 200µm, etc.
[0029] In some examples, the organic polymer barrier layer 130 includes one or more layers selected from polyurethane, acrylic, and polyacrylic acid. When the organic polymer barrier layer 130 includes multiple layers, the multiple layers are stacked. For example, the organic polymer barrier layer 130 includes a stack of polyurethane and acrylic layers.
[0030] In some examples, the thickness of the organic polymer barrier layer 130 is 0.5µm to 2µm. Further, in some examples, the thickness of the organic polymer barrier layer 130 is 1µm to 1.5µm. In some specific examples, the thickness of the organic polymer barrier layer 130 is 0.5µm, 0.7µm, 0.9µm, 1.1µm, 1.3µm, 1.5µm, 1.7µm, 1.9µm, 2µm, etc.
[0031] In some of these examples, the inorganic barrier layer 120 includes at least one of the following: SiO2 layer, Al2O3 layer, TiO2 layer, ZrO2 layer, HfO2 layer, ZnO layer, Ta2O5 layer, CeO2 layer, Nb2O5 layer, ZnS layer, and Si3N4 layer.
[0032] In some examples, the inorganic barrier layer 120 includes multiple stacked sublayers, which are at least four layers selected from SiO2, Al2O3, TiO2, ZrO2, HfO2, ZnO, Ta2O5, CeO2, Nb2O5, ZnS, and Si3N4. In these examples, by setting different sublayers, defects existing in a single layer can be isolated between layers, reducing the continuous diffusion pathways of water and oxygen in the film layer, thereby reducing water and oxygen permeability.
[0033] For example, the inorganic barrier layer 120 includes a first sublayer 121, a second sublayer 122, a third sublayer 123, and a fourth sublayer 124 stacked sequentially. The first sublayer 121, the second sublayer 122, the third sublayer 123, and the fourth sublayer 124 are layers of different materials. For example, the first sublayer 121 is a ZrO2 layer, the second sublayer 122 is a CeO2 layer, the third sublayer 123 is a Si3N4 layer, and the fourth sublayer 124 is a SiO2 layer.
[0034] In some examples, the thickness of each sublayer in the inorganic barrier layer 120 is 10 nm to 50 nm. Further, in some examples, the thickness of each sublayer in the inorganic barrier layer 120 is 20 nm to 40 nm. In some specific examples, the thickness of each sublayer in the inorganic barrier layer 120 is 10 nm, 15 nm, 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, 50 nm, etc.
[0035] In some examples, the composite barrier layer 140 has a thickness of 0.5µm to 2µm. Further, in some examples, the composite barrier layer 140 has a thickness of 1µm to 1.5µm. In some specific examples, the composite barrier layer 140 has thicknesses of 0.5µm, 0.7µm, 0.9µm, 1.1µm, 1.3µm, 1.5µm, 1.7µm, 1.9µm, 2µm, etc.
[0036] In some examples, the particle size of the zeolite nanoparticles is 10 nm to 200 nm. Further, in some examples, the particle size of the zeolite nanoparticles is 50 nm to 150 nm. In some specific examples, the particle size of the zeolite nanoparticles is 10 nm, 20 nm, 40 nm, 60 nm, 80 nm, 100 nm, 120 nm, 140 nm, 160 nm, 180 nm, 200 nm, etc., or a range between any two of the above values.
[0037] In some examples, the mass fraction of zeolite nanoparticles in the composite barrier layer 140 is 30% to 50%. Further, in some examples, the mass fraction of zeolite nanoparticles is 35% to 45%. In some specific examples, the mass fraction of zeolite nanoparticles is 30%, 35%, 40%, 45%, 50%, etc.
[0038] In some of these examples, the polymer matrix of the composite barrier layer 140 includes one of polyurethane, acrylic, and polyacrylic acid.
[0039] In some examples, the battery encapsulation film 100 further includes a scratch-resistant protective layer 150, which is disposed on the side of the substrate layer 110 opposite to the inorganic barrier layer 120. The scratch-resistant protective layer 150 includes one or more of a DLC (diamond-like carbon) layer and an AF (anti-fingerprint) layer. When the scratch-resistant protective layer 150 includes multiple layers of the above-mentioned layers, the multiple layers are stacked. For example, the scratch-resistant protective layer 150 includes a stack of DLC layers and AF layers.
[0040] In some of these examples, the thickness of the scratch-resistant protective layer 150 is 2nm to 300nm.
[0041] In some examples, the battery encapsulation film 100 further includes a heat-sealing layer 160 disposed on the side of the composite barrier layer 140 opposite to the organic polymer barrier layer 130. The heat-sealing layer 160 includes one or more layers of CPP (cast polypropylene) and PP (polypropylene). When the heat-sealing layer 160 includes multiple layers, the layers are stacked. For example, the heat-sealing layer 160 includes a stack of CPP and PP layers. The heat-sealing layer 160 is used for the heat-sealing of the battery.
[0042] In some examples, the thickness of the heat-sealing layer 160 is 30µm to 80µm. Further, in some examples, the thickness of the heat-sealing layer 160 is 40µm to 70µm. In some specific examples, the thickness of the heat-sealing layer 160 is 30µm, 35µm, 40µm, 45µm, 50µm, 55µm, 60µm, 65µm, 70µm, 75µm, 80µm, etc.
[0043] In some examples, the battery encapsulation film 100 also includes an adhesive layer 170. The adhesive layer 170 is disposed between the composite barrier layer 140 and the heat-sealing layer 160. The adhesive layer 170 is used to bond and fix the heat-sealing layer 160 to the surface of the organic polymer barrier layer 130.
[0044] In some examples, adhesive layer 170 includes one or more layers of PU (polyurethane), PVDF (polyvinylidene fluoride), and PAA (polyacrylic acid). When adhesive layer 170 includes multiple layers of the above-mentioned layers, the multiple layers are stacked. For example, adhesive layer 170 includes a stack of PU and PVDF layers.
[0045] In some examples, the battery encapsulation film 100 also includes a hardened undercoat 180. The hardened undercoat 180 is disposed between the inorganic barrier layer 120 and the substrate layer 110. The hardened undercoat 180 can isolate water and oxygen and increase the adhesion between the substrate layer 110 and the inorganic barrier layer 120.
[0046] In some examples, the hardening primer 180 comprises one or more layers of polyurethane, acrylic, and cyclic olefin copolymer. When the hardening primer 180 comprises multiple layers, the layers are stacked. For example, the hardening primer 180 comprises a stack of polyurethane and acrylic layers.
[0047] In some examples, the thickness of the hardened primer 180 is 0.5µm to 2µm. Further, in some examples, the thickness of the hardened primer 180 is 1µm to 1.5µm. In some specific examples, the thickness of the hardened primer 180 is 0.5µm, 0.7µm, 0.9µm, 1.1µm, 1.3µm, 1.5µm, 1.7µm, 1.9µm, 2µm, etc.
[0048] The aforementioned battery encapsulation film 100 comprises, sequentially on a substrate layer 110, an inorganic barrier layer 120, an organic polymer barrier layer 130, and a composite barrier layer 140. The inorganic barrier layer 120 exhibits high density and excellent water and oxygen barrier performance. The organic polymer barrier layer 130 fills the microscopic pinholes and cracks on the surface of the inorganic barrier layer 120, blocking the permeation path of water vapor or oxygen through microchannels, further enhancing the barrier capability. The composite barrier layer 140 comprises a polymer matrix and zeolite nanoparticles dispersed therein. The polymer matrix blocks water and oxygen, while the zeolite nanoparticles possess a three-dimensional porous structure capable of adsorbing water and oxygen. Through the multifaceted effects and synergy of each layer, the water and oxygen barrier performance of the battery encapsulation film 100 is effectively improved.
[0049] Furthermore, this application also provides a battery.
[0050] One embodiment of the battery includes a battery body and a battery encapsulation film 100 of any of the above examples, the battery encapsulation film 100 encapsulating the battery body.
[0051] The battery described above has the battery encapsulation film 100 of any of the above embodiments, and thus has the corresponding technical features and can obtain the corresponding beneficial effects.
[0052] The following specific embodiments further illustrate this application. These specific embodiments are provided to better understand this application, but are not limited to them and do not constitute a limitation on the content or scope of protection of this application.
[0053] Example 1
[0054] This embodiment provides a battery encapsulation film, comprising a scratch-resistant protective layer, a substrate layer, a hardened base layer, an inorganic barrier layer, an organic polymer barrier layer, a composite barrier layer, an adhesive layer, and a heat-sealing layer, which are stacked sequentially.
[0055] The structure includes: a scratch-resistant protective layer (DLC layer, 40 nm thick); a substrate layer (ETFE layer, 100 µm thick); a hardened primer layer (cyclic olefin copolymer layer, 1 µm thick); an inorganic barrier layer consisting of four sequentially stacked sublayers: a ZrO2 layer, a CeO2 layer, a Si3N4 layer, and a SiO2 layer; each sublayer being 20 nm thick; an organic polymer barrier layer (acrylic layer, 1 µm thick); a composite barrier layer comprising a polyurethane matrix and dispersed zeolite nanoparticles (40% by mass, 10 nm–50 nm in size); a composite barrier layer being 1 µm thick; a PU layer as the adhesive layer; and a CPP layer with a 50 µm thickness.
[0056] Example 2
[0057] This embodiment provides a battery encapsulation film, comprising a scratch-resistant protective layer, a substrate layer, a hardened base layer, an inorganic barrier layer, an organic polymer barrier layer, a composite barrier layer, an adhesive layer, and a heat-sealing layer, which are stacked sequentially.
[0058] The structure includes: a scratch-resistant protective layer (DLC layer, 40 nm thick); a substrate layer (ETFE layer, 100 µm thick); a hardened primer layer (cyclic olefin copolymer layer, 1 µm thick); an inorganic barrier layer consisting of five sublayers stacked sequentially: a ZrO2 layer, a CeO2 layer, a Si3N4 layer, a SiO2 layer, and a TiO2 layer; each sublayer being 20 nm thick; an organic polymer barrier layer (polyacrylic acid layer, 1 µm thick); a composite barrier layer comprising a polyurethane matrix and dispersed zeolite nanoparticles (50% by mass, 10 nm–50 nm in size); a composite barrier layer being 1 µm thick; a PU layer as the adhesive layer; and a CPP layer with a 50 µm thick heat-sealing layer.
[0059] Comparative Example 1
[0060] The battery encapsulation film in this comparative example is a traditional aluminum-plastic film.
[0061] Comparative Example 2
[0062] This embodiment provides a battery encapsulation film, comprising a scratch-resistant protective layer, a substrate layer, an inorganic barrier layer, an adhesive layer, and a heat-sealing layer stacked sequentially.
[0063] The scratch-resistant protective layer is a DLC layer with a thickness of 40 nm. The substrate layer is an ETFE layer with a thickness of 100 µm. The inorganic barrier layer consists of four sublayers stacked sequentially: a first sublayer (ZrO2), a second sublayer (CeO2), a third sublayer (Si3N4), and a fourth sublayer (SiO2). Each sublayer has a thickness of 20 nm. The adhesive layer is a PU layer. The heat-sealing layer is a CPP layer with a thickness of 50 µm.
[0064] Comparative Example 3
[0065] This embodiment provides a battery encapsulation film, comprising a scratch-resistant protective layer, a substrate layer, an inorganic barrier layer, an organic polymer barrier layer, an adhesive layer, and a heat-sealing layer stacked sequentially.
[0066] The scratch-resistant protective layer is a DLC layer with a thickness of 40 nm. The substrate layer is an ETFE layer with a thickness of 100 µm. The inorganic barrier layer consists of four sublayers stacked sequentially: a first sublayer (ZrO2), a second sublayer (CeO2), a third sublayer (Si3N4), and a fourth sublayer (SiO2). Each sublayer has a thickness of 20 nm. The organic polymer barrier layer is an acrylic layer with a thickness of 1 µm. The adhesive layer is a PU layer. The heat-sealing layer is a CPP layer with a thickness of 50 µm.
[0067] Comparative Example 4
[0068] This embodiment provides a battery encapsulation film, comprising a scratch-resistant protective layer, a substrate layer, a hardened primer layer, an inorganic barrier layer, an organic polymer barrier layer, an adhesive layer, and a heat-sealing layer, which are stacked sequentially.
[0069] The structure includes: a scratch-resistant protective layer (DLC layer, 40 nm thick); a substrate layer (ETFE layer, 100 µm thick); a hardened primer layer (cyclic olefin copolymer layer, 2 µm thick); an inorganic barrier layer consisting of four sequentially stacked sublayers: a ZrO2 layer, a CeO2 layer, a Si3N4 layer, and a SiO2 layer; and an organic polymer barrier layer (acrylic layer, 1 µm thick); an adhesive layer (PU layer); and a heat-sealing layer (CPP layer, 50 µm thick).
[0070] The water vapor transmission rate and oxygen transmission rate of the battery encapsulation films of the above embodiments and comparative examples were tested, and the test results are shown in Table 1.
[0071] Table 1. Water vapor transmission rate and oxygen transmission rate of the battery encapsulation films in each embodiment and comparative example.
[0072]
[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A battery packaging film, characterized by, It includes a substrate layer, an inorganic barrier layer, an organic polymer barrier layer, and a composite barrier layer stacked sequentially, wherein the composite barrier layer includes a polymer matrix and zeolite nanoparticles dispersed in the polymer matrix.
2. The battery packaging film of claim 1, wherein, The substrate layer includes one or more of ETFE, PTFE, and ePTFE layers. When the substrate layer includes multiple layers of the above-mentioned layers, the multiple layers are stacked.
3. The battery packaging film of claim 1, wherein, The organic polymer barrier layer includes one or more layers of polyurethane, acrylic, and polyacrylic acid. When the organic polymer barrier layer includes multiple layers of the above-mentioned layers, the multiple layers are stacked together.
4. The battery encapsulation film according to any one of claims 1 to 3, characterized in that, The inorganic barrier layer comprises multiple stacked sub-layers, and the multiple sub-layers are at least four of the following: SiO2 layer, Al2O3 layer, TiO2 layer, ZrO2 layer, HfO2 layer, ZnO layer, Ta2O5 layer, CeO2 layer, Nb2O5 layer, ZnS layer, and Si3N4 layer.
5. The battery encapsulation film as described in claim 4, characterized in that, In the inorganic barrier layer, the thickness of each sublayer is 10nm~50nm, the thickness of the organic polymer barrier layer is 0.5µm~2µm, and the thickness of the composite barrier layer is 0.5µm~2µm.
6. The battery encapsulation film according to any one of claims 1 to 3, characterized in that, The particle size of the zeolite nanoparticles is 10nm~200nm.
7. The battery encapsulation film according to any one of claims 1 to 3, characterized in that, The battery encapsulation film also includes a scratch-resistant protective layer, which is disposed on the side of the substrate layer away from the inorganic barrier layer. The scratch-resistant protective layer includes one or more of the DLC layer and the AF layer. When the scratch-resistant protective layer includes multiple layers of the above-mentioned layers, the multiple layers are stacked.
8. The battery encapsulation film according to any one of claims 1 to 3, characterized in that, The battery encapsulation film further includes a heat-sealing layer, which is disposed on the side of the composite barrier layer away from the organic polymer barrier layer. The heat-sealing layer is one or more of CPP and PP layers. When the heat-sealing layer includes multiple layers of the above-mentioned layers, the multiple layers are stacked together.
9. The battery encapsulation film according to any one of claims 1 to 3, characterized in that, The battery encapsulation film also includes an adhesive layer disposed between the composite barrier layer and the heat-sealing layer.
10. A battery, characterized in that, It includes a battery body and a battery encapsulation film according to any one of claims 1 to 9, wherein the battery encapsulation film encapsulates the battery body.