TW202003713A - Corrosion-resistant coating composition and corrosion-resistant aluminum-plastic film for packaging battery - Google Patents

Abstract

The present invention provides a corrosion-resistant coating composition for an aluminum-plastic film for packaging battery. The present corrosion-resistant coating composition comprises a difunctional polyester acrylate oligomer, a functional monomer comprising at least one monofunctional monomer and at least one multifunctional monomer, a photoinitiator and at least an additive. The corrosion-resistant coating composition can be coated on the heat-resistant protective layer of an aluminum laminated film to provide a good electrolyte resistance to the aluminum-plastic film for packaging battery.

Description

Corrosion-resistant coating composition and corrosion-resistant aluminum-plastic film for lithium battery packaging

The present invention relates to a corrosion-resistant coating composition, and particularly to a corrosion-resistant coating composition for an aluminum-plastic film for battery packaging.

Lithium batteries are widely recognized for their high operating voltage, small size, light weight, large energy density, no memory effect, no pollution, small self-discharge, and long cycle life. Since its commercialization, lithium batteries have been widely used in portable appliances such as laptop computers, camcorders, and mobile communications, and have become the main power source for various electronic products. The lithium battery is made by sealing and molding the battery body such as the positive electrode material, the negative electrode material, the separator, and the electrolyte with a packaging material. In the past, extruded metal can-type outer packaging was used, but in recent years, in order to improve the freedom of shape and weight reduction, laminated aluminum-plastic films with metal layers such as aluminum foil have been widely used, that is, for example, heat-resistant layers/metal layers /The laminated film composed of the sealing layer is used as the outer packaging material of the battery.

When packaging a battery with an aluminum-plastic film, the aluminum-plastic film is first formed into a recess by stamping, and then the battery body is placed in the recess, and then the periphery is sealed by heat sealing to encapsulate the battery. In the prior art, considering the packaging procedure of the battery, a polyimide film that is less likely to crack or pinhole during stamping and has excellent moldability is selected as the heat-resistant layer. However, the electrolyte resistance of the polyamide film is relatively low. Therefore, if the battery is damaged during the manufacturing process of the battery and the electrolyte is leaked, the electrolyte may adhere to the outer packaging material of other batteries and cause a heat-resistant layer Damage and corrode the inner metal layer.

An object of the present invention is to provide a functional coating composition for an aluminum-plastic film that can be used for battery packaging, which can increase the corrosion resistance and flexibility of the heat-resistant protective layer of the aluminum-plastic film without affecting the aluminum-plastic film as a battery package The required physical properties of the membrane.

The invention provides a corrosion-resistant coating composition, and particularly relates to a corrosion-resistant coating composition for an aluminum-plastic film used for battery packaging. The corrosion-resistant coating composition of the present invention comprises a difunctional polyester acrylate oligomer, a functional monomer containing at least one monofunctional monomer and at least one multifunctional monomer, an initiator and a helper Agent.

In a preferred embodiment of the present invention, the corrosion-resistant coating composition of the present invention comprises 45 to 75 weight percent of a difunctional polyester acrylate oligomer, and 15 to 40 weight percent of a monofunctional group containing at least one monofunctional group And at least one polyfunctional monomer, a functional monomer, 5 to 15% by weight of an initiator and 2 to 5% by weight of an auxiliary agent.

In one embodiment of the present invention, the functional group-containing monomer contains 70 to 90 weight percent of the monofunctional group monomer with respect to the total weight of the functional group monomer and 10 to 30 weight percent with respect to the total weight of the functional group monomer The multifunctional group monomer, the monofunctional group monomer preferably accounts for 75 to 83 weight percent of the total weight of the functional group monomer, and the multifunctional group monomer preferably accounts for 17 to 25 of the total weight of the functional group monomer Weight percentage.

In an embodiment of the present invention, the monofunctional monomer may be N-acryloyl morpholine (ACMO), isobornyl acrylate (IBOA), tetrahydrofurfuryl acrylate (THFA), Lauryl acrylate (LA), methyl methacrylate (MMA), cyclic trimethylopropane formal acrylate (CTFA) or a combination of the foregoing materials.

In one embodiment of the present invention, the multifunctional monomer may be tri(propylene glycol) diacrylate (TPDGA), dipentaerythritol hexa-acrylate (DPHA), triethoxylated Ethoxylated trimethylolpropane triacrylate (EO-TMPTA), ethoxylated pentaerythritol tetraacrylate (PPTTA) or a combination of the foregoing materials.

In one embodiment of the present invention, the initiator is a photo-initiator, and the amount of the photo-initiator used is about 8 to 12 weight percent of the total weight of the corrosion-resistant coating composition.

In one embodiment of the present invention, the photoinitiator may be 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl phenyl acetone, 2,4,6-trimethyl benzoyl diacetyl Phenylphosphine oxide, benzophenone ether or a combination of the foregoing materials.

In one embodiment of the present invention, the auxiliary agent may be a stabilizer, a coupling agent, a leveling agent, an antifoaming agent, a dispersing agent, a thixotropic agent, or a combination of the foregoing materials.

In one embodiment of the present invention, the amount of additives used is 3 to 4 weight percent of the total weight of the corrosion-resistant coating composition.

Another aspect of the present invention is to provide a corrosion-resistant aluminum-plastic film that can be used for battery packaging, which includes a heat-resistant protective layer, an aluminum foil layer, and a heat-sealing layer, wherein the heat-resistant protective layer is coated with a corrosion-resistant layer.

In a preferred embodiment of the corrosion-resistant aluminum-plastic film of the present invention, the corrosion-resistant layer is formed by coating the aforementioned corrosion-resistant coating composition on the heat-resistant layer.

In a preferred embodiment of the corrosion-resistant aluminum-plastic film of the present invention, the thickness of the corrosion-resistant layer on the heat-resistant layer is between 1 micrometer (μm) and 8 micrometers (μm), and preferably between 3 micrometers ( μm) to 5 microns (μm).

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, preferred embodiments are described in detail below, but the provided embodiments are not intended to limit the scope of the disclosure.

In addition, the terms used in the entire specification and the scope of patent application, unless otherwise specified, usually have the ordinary meaning that each term is used in this field, in the content disclosed here, and in the special content . Certain terms used to describe this disclosure will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in the description of this disclosure.

The invention provides a corrosion-resistant coating composition, and particularly relates to a corrosion-resistant coating composition for an aluminum-plastic film used for battery packaging. The corrosion-resistant coating composition of the present invention comprises a difunctional polyester acrylate oligomer, a functional group-containing monomer containing at least one monofunctional group monomer and at least one multifunctional group monomer, an initiator and an auxiliary agent.

In a preferred embodiment of the present invention, the corrosion-resistant coating composition comprises 45 to 75 weight percent of a difunctional polyester acrylate oligomer, 15 to 40 weight percent of a monomer containing at least one monofunctional group and at least A multifunctional monomer with a functional group monomer, 5 to 15 weight percent initiator and 2 to 5 weight percent auxiliary.

In a preferred embodiment of the present invention, the difunctional polyester acrylate oligomer used in the corrosion-resistant coating composition of the present invention is an oligomer containing fewer functional groups, which has better flexibility 1. Low odor and low irritation. After cross-linking, the main chain long alkane chain has a network structure, so it has balanced tensile strength and chemical resistance at the same time. The bifunctional polyester acrylate oligomer suitable for the present invention may be a general commercial product but has the characteristic that the viscosity at 60°C is greater than 1200 cps, for example, the special material oligomer 6331 produced by Changxing Materials Co., Ltd. Satomer's polyester acrylate oligomers CN2254NS, CN2252 and similar oligomers, etc., but not limited to this. The corrosion-resistant coating composition of the present invention may use a single difunctional polyester acrylate oligomer, or use two or more difunctional polyester acrylate oligomers. In a preferred embodiment of the present invention, two types of difunctional polyester acrylate oligomers are used, and their usage can be mixed in equal weight ratios.

In one embodiment of the present invention, the amount of difunctional polyester acrylate oligomer used is about 45 to 75 weight percent of the weight of the corrosive coating composition. Excessive use of difunctional polyester acrylate oligomers may affect the corrosion resistance of the aluminum plastic film used for battery packaging and affect the electrolyte resistance of the aluminum plastic film. When the amount of the difunctional polyester acrylate oligomer used is too small, the corrosion-resistant layer of the aluminum-plastic film formed by the corrosion-resistant coating composition may peel off or crack when the aluminum-plastic film is stamped and formed.

In a preferred embodiment of the present invention, the corrosion-resistant coating composition of the present invention includes a functional group monomer, and the functional group monomer contains at least one monofunctional group monomer and at least one multifunctional group monomer. The functional group monomer in the corrosion-resistant coating composition of the present invention adopts a functional gradient design, wherein the functionality refers to the number of molecules or functional groups in the molecule that the monomer can connect during the condensation reaction. It contains a monofunctional monomer and a multifunctional monomer to balance the chemical resistance and flexibility of the corrosion-resistant coating composition.

In the functional group-containing monomer of the corrosion-resistant coating composition of the present invention, the monofunctional group monomer accounts for 70 to 90 weight percent of the total weight of the functional group monomer, preferably, the monofunctional group monomer accounts for the functional group 75 to 83 weight percent of the total monomer weight. Excessive use of monofunctional monomers may affect the corrosion resistance of aluminum-plastic films used for battery packaging.

The monofunctional monomer suitable for the corrosion-resistant coating composition of the present invention may be a monomer having characteristics such as easy dissolution, non-toxicity, and good photoreactivity, such as N-acryloyl morpholine (ACMO), isomeric Isobornyl acrylate (IBOA), tetrahydrofurfuryl acrylate (THFA), lauryl acrylate (LA), methyl methacrylate (MMA), cyclotrimethylolpropane methyl ester Cyclic trimethylopropane formal acrylate (CTFA) or a combination of the foregoing materials, but is not limited thereto. In a preferred embodiment of the present invention, the monofunctional monomers may be N-acryl morpholine (ACMO) monomers, isobornyl acrylate (IBOA) monomers, tetrahydrofuran acrylate (THFA) monomers and acrylic acid Combination of dodecyl ester (LA) monomers.

In the functional group-containing monomer of the corrosion-resistant coating composition of the present invention, the polyfunctional group monomer accounts for 10 to 30 weight percent of the total weight of the functional group monomer, preferably, the multifunctional group monomer accounts for the functional group 17 to 25 weight percent of the total monomer weight. When the amount of the multifunctional monomer used is excessive, the corrosion-resistant layer of the aluminum-plastic film formed by the corrosion-resistant coating composition may peel off or crack when the aluminum-plastic film is stamped and formed.

Suitable multifunctional monomers can be, for example, tri(propylene glycol) diacrylate (TPDGA), dipentaerythritol hexa-acrylate (DPHA), ethoxylated trimethylolpropane triacrylate Ethoxylated trimethylolpropane triacrylate (EO-TMPTA), ethoxylated pentaerythritol tetraacrylate (PPTTA) or a combination of the foregoing materials, but not limited thereto. The corrosion-resistant coating composition of the present invention uses at least one multifunctional monomer. In one embodiment of the present invention, the multifunctional monomer may be a combination of tripropylene glycol diacrylate (TPDGA) and dipentaerythritol hexaacrylate (DPHA).

In one embodiment of the present invention, the initiator used in the corrosion-resistant coating composition may be a photoinitiator used in the conventional technology, such as but not limited to 1-hydroxycyclohexyl phenyl ketone, 2-Hydroxy-2-methylphenylacetone, 2,4,6-trimethylbenzyl diphenylphosphine oxide, benzophenone ethyl ether or a combination of the foregoing materials. In a preferred embodiment of the present invention, the initiator may be 1-hydroxycyclohexyl phenyl ketone. The amount of the initiator used is 5 to 15% by weight of the total weight of the corrosion-resistant coating composition, preferably 8 to 12% by weight. Too much amount of initiator will affect the adhesion between the corrosion-resistant layer formed by the corrosion-resistant coating composition and the heat-resistant protective layer of the aluminum plastic film.

In a preferred embodiment of the present invention, the corrosion-resistant coating composition may further include an auxiliary agent. Suitable additives may include, but are not limited to, stabilizers, coupling agents, leveling agents, defoamers, dispersants, thixotropic agents, or combinations of the foregoing materials. In the corrosion-resistant coating composition of the present invention, the amount of additives used is 2 to 5 weight percent of the total weight of the corrosion-resistant coating composition, preferably 3 to 4 weight percent.

Another aspect of the present invention is to provide a corrosion-resistant aluminum-plastic film that can be used for lithium battery packaging, which includes a corrosion-resistant layer, a heat-resistant protective layer, an aluminum foil layer, and a heat-sealing layer in sequence. Wherein, the heat-resistant protective layer may be a polyamide film, the thickness of which is between 15 microns (μm) and 40 microns (μm). The polyamide film is used to provide good impact resistance, puncture resistance, heat resistance and insulation of the aluminum plastic film as a whole. The aluminum foil layer is used to block moisture to protect the internal components of the battery, and its thickness is about 30 microns (μm) to 60 microns (μm). The heat-sealing layer may be a polypropylene film with good electrolyte resistance and heat-sealability. The thickness of the suitable polypropylene film is about 30 microns (μm) to 80 microns (μm). An adhesive layer may be provided between the heat-resistant protective layer and the aluminum foil layer and between the aluminum foil layer and the heat seal layer to adhere the heat-resistant protective layer and the aluminum foil layer and between the aluminum foil layer and the heat seal layer. The material of the adhesive layer may be a polyester adhesive or polyolefin adhesive with excellent heat resistance, moldability or electrolyte resistance.

The corrosion-resistant layer of the corrosion-resistant aluminum-plastic film of the present invention is formed by coating the aforementioned corrosion-resistant coating composition on the heat-resistant protective layer of the aluminum-plastic film. In a preferred embodiment of the corrosion-resistant aluminum-plastic film of the present invention, the corrosion-resistant layer has a thickness between 1 micrometer (μm) and 8 micrometers (μm), and preferably between 3 micrometers (μm) and 5 Between micrometers (μm).

In one embodiment of the corrosion-resistant aluminum-plastic film of the present invention, the corrosion-resistant layer can be coated on the heat-resistant protective layer by a conventional coating method. Methods that may be used may include, but are not limited to, dip coating, drum coating, blade coating, curtain coating, or bevel coating, and the like.

The following examples are used to further illustrate the present invention, but the present invention is not limited thereto.

Examples

The chemical materials used in the following examples are as follows:

Example 1

The compounds shown in Table 1 below and their use weights were placed in a 1 liter reaction flask, and stirred uniformly at room temperature to form a slurry. The slurry was released with ethyl acetate to an easy-to-apply liquid with a solid content of 70%, and the wire rod was evenly coated on the surface of the heat-resistant protective layer of the aluminum plastic film of the battery package to form 8~10 microns (μm) Corrosion-resistant coating.

Bake the aluminum-plastic film of the battery packaging with a corrosion-resistant coating at 85°C for 1 minute to remove ethyl acetate, and then irradiate it with a high-pressure mercury lamp at a wavelength of 300-450 nanometers (nm) for 0.5 minutes to cure the coating. The cumulative energy required for curing is 800 to 1500 mj/cm ² , and then a corrosion-resistant layer with a thickness of about 5 micrometers (μm) is formed.

Example 2

The compounds shown in Table 1 below and their use weights were placed in a 1 liter reaction flask, and stirred uniformly at room temperature to form a slurry. The slurry was released with ethyl acetate to an easy-to-apply liquid with a solid content of 70%, and the wire rod was evenly coated on the surface of the heat-resistant protective layer of the aluminum plastic film of the battery package to form 8~10 microns (μm) Corrosion-resistant coating.

Bake the aluminum-plastic film of the battery packaging with a corrosion-resistant coating at 95°C for 2 minutes to remove ethyl acetate, and then irradiate it with a high-pressure mercury lamp at a wavelength of 300 to 450 nanometers (nm) to cure the coating. The cumulative energy required for irradiation is 800 to 1500 mj/cm ² , and then a corrosion-resistant layer with a thickness of 5 micrometers (μm) is formed.

Example 3

The compounds shown in Table 1 below and their use weights were placed in a 1 liter reaction flask, and stirred uniformly at room temperature to form a slurry. The slurry was released with ethyl acetate to an easy-to-apply liquid with a solid content of 70%, and the wire rod was evenly coated on the surface of the heat-resistant protective layer of the aluminum plastic film of the battery package to form 8~10 microns (μm) Corrosion-resistant coating.

Bake the aluminum-plastic film with a corrosion-resistant coating at 85°C for 2 minutes to remove ethyl acetate, then irradiate it with a high-pressure mercury lamp at a wavelength of 300-450 nanometers (nm) to cure the coating and cure it The required cumulative energy of irradiation is 800~1500mj/cm ² , and then a corrosion-resistant layer with a thickness of 5 micrometers (μm) is formed.

Comparative example 1

The compounds shown in Table 2 below and their weights were put into a 1 liter reaction flask and stirred at room temperature to form a slurry. The slurry was released with ethyl acetate to an easy-to-apply liquid with a solid content of 70%, and the wire rod was evenly coated on the surface of the heat-resistant protective layer of the aluminum battery film for lithium battery packaging to form 8~10 microns (μm) Anti-corrosion coating.

Bake the aluminum-plastic film of the lithium battery packaging with a corrosion-resistant layer at 85°C for 1 minute to remove ethyl acetate, and then irradiate it with a high-pressure mercury lamp at a wavelength of 300 to 450 nanometers (nm) to cure the coating. The cumulative energy required for irradiation is 800 to 1500 mj/cm ² , and then a corrosion-resistant layer with a thickness of 5 micrometers (μm) is formed.

Comparative example 2

The compounds shown in Table 2 below and their weights were put into a 1 liter reaction flask and stirred at room temperature to form a slurry. The slurry was released with ethyl acetate to an easy-to-apply liquid with a solid content of 70%, and the wire rod was evenly coated on the surface of the heat-resistant layer of the aluminum-plastic film for lithium battery packaging to form a 8-10 micrometer (μm) Corrosion-resistant coating.

The aluminum plastic film of the lithium battery packaging coated with a corrosion-resistant coating is baked at 85°C for 1 minute to remove ethyl acetate, and then irradiated with a high-pressure mercury lamp at a wavelength of 300 to 450 nanometers (nm) to cure the coating The cumulative energy of irradiation required for curing is 800~1500mj/cm ² , and then a corrosion-resistant layer with a thickness of 5 micrometers (μm) is formed.

Comparative Example 3

The compounds shown in Table 2 below and their weights were put into a 1 liter reaction flask and stirred at room temperature to form a slurry. The slurry was released with ethyl acetate to an easy-to-apply liquid with a solid content of 70%, and the wire rod was evenly coated on the surface of the heat-resistant layer of the aluminum-plastic film for lithium battery packaging to form a 8-10 micrometer (μm) Corrosion-resistant coating.

The aluminum plastic film of the lithium battery packaging coated with a corrosion-resistant coating is baked at 85°C for 1 minute to remove ethyl acetate, and then irradiated with a high-pressure mercury lamp at a wavelength of 300 to 450 nanometers (nm) to cure the coating The cumulative energy of irradiation required for curing is 800~1500mj/cm ² , and then a corrosion-resistant layer with a thickness of 5 micrometers (μm) is formed.

Next, the corrosion-resistant aluminum-plastic films prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were tested according to the following methods. The evaluation results are shown in Table 3.

Adhesion test

The adhesion test was conducted between the corrosion-resistant layer formed on the heat-resistant protective layer of the aluminum plastic film and the heat-resistant protective layer. Adhesion testing is performed according to ASTM D3359 adhesion test standard and is graded. The 100 grid test method is to use a 100 grid knife to scratch the corrosion-resistant layer and 100 small grids of 1mm ² *1mm ² in the bottom layer of the paint, then adhere the test grid with 3M 600 standard tape, and wipe the tape with an eraser. In order to increase the contact volume and strength of the tape and the measured area, finally grab the end of the tape and quickly tear it off in a vertical direction.

Table 3 below shows the results of performing adhesion tests on the corrosion-resistant layer formed after applying the heat-resistant protective layer of the aluminum-plastic film to the corrosion-resistant coating compositions of Examples 1 to 3 and Comparative Examples 1 to 3. Among them, the heat-resistant protective layer of the aluminum plastic film is a polyamide film. Due to the chemical inertness of the polyamide film itself, it is not easy to chemically bond with the coating. The coating composition can only adhere to a weak intermolecular force to achieve adhesion. . Furthermore, since the surface energy of the polyamide film is low and the hygroscopicity is strong, the coating composition is not easily wetted, which increases the difficulty of adhesion. The corrosion-resistant coating composition of the present invention is added with a silane coupling agent to enhance adhesion.

Electrolyte resistance test

After coating the corrosion-resistant coating composition of the present invention on the heat-resistant protective layer of the aluminum plastic film, an electrolyte resistance test is performed. The test method is divided into (A) The electrolyte flows down on the corrosion-resistant layer of the aluminum-plastic film, and placed at 60 ℃, one day later visually observe the appearance of the aluminum-plastic film; (B) The electrolyte drops on the aluminum-plastic film resistance On the corrosive layer, wipe it with wiping paper and put it at 60℃, observe the appearance of the aluminum plastic film visually one day later; (C) Drop the electrolyte on the corrosion-resistant layer of the aluminum plastic film, and put it at room temperature without wiping. After one day, visually observe the appearance of the aluminum plastic film. The electrolyte resistance test results of the corrosion-resistant aluminum plastic films of the examples and comparative examples are shown in Table 3 below, where "◎" indicates that the surface of the corrosion-resistant layer is completely free of corrosion; "△" indicates the surface of the corrosion-resistant layer There are water-like erosion marks; "x" indicates that the surface of the corrosion-resistant layer is corroded and the thickness is reduced.

Deep drawing test

Place the 200mm*100mm corrosion-resistant aluminum-plastic film on the center of the punching machine platform with the corrosion-resistant layer facing upward, and then set the punching depth to start the punching machine. After the die on the punching machine is lowered and the corrosion-resistant aluminum plastic film is clamped, the lower die is raised under the following stamping conditions, and the die head is raised.

Pressing conditions: punching torque 250 (N-m), punching speed 3000 (μm/sec)

After the corrosion-resistant coating composition of each of the foregoing examples was applied to an aluminum-plastic film to form a corrosion-resistant layer, the adhesion, electrolyte resistance, and deep-drawing test results of the aluminum-plastic film with the corrosion-resistant layer showed that The corrosion-resistant layer formed by the corrosion-resistant coating composition of the invention does provide good electrolyte resistance and exhibits good performance in adhesion and penetration tests, and does not affect the aluminum-plastic film required for battery packaging films Physical properties.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this skill can make some modifications and retouching without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be deemed as defined by the scope of the attached patent application.

Claims (12)

A corrosion-resistant coating composition comprising: 45 to 75 weight percent of a difunctional polyester acrylate oligomer; 15 to 40 weight percent of a functional group monomer, wherein the functional group monomer contains at least A monofunctional monomer and at least one polyfunctional monomer; 5 to 15 weight percent of an initiator; and 2 to 5 weight percent of an auxiliary agent. The corrosion-resistant coating composition as described in item 1 of the patent application range, wherein the functional group monomer contains 70 to 90 weight percent of the monofunctional group monomer and 10 to 30 weight percent of the total weight of the functional group monomer The weight percentage of the multifunctional monomer. The corrosion-resistant coating composition as described in item 2 of the patent application range, wherein the functional group monomer contains 75 to 83 weight percent of the monofunctional group monomer and 17 to 25 weight percent of the total weight of the functional group monomer The weight percentage of the multifunctional monomer. The corrosion-resistant coating composition as described in item 1 of the patent application range, wherein the monofunctional mono-system is selected from acryloyl morpholine (ACMO), isobornyl acrylate (IBOA), tetrahydrofuran acrylic acid Tetrahydrofurfuryl acrylate (THFA), lauryl acrylate (LA), methyl methacrylate (MMA), cyclic trimethylopropane formal acrylate (CTFA) And the combination of the aforementioned materials. The corrosion-resistant coating composition as described in item 1 of the patent application scope, wherein the multifunctional mono-system is selected from tri(propylene glycol) diacrylate (TPDGA), dipentaerythritol hexaacrylate (Dipentaerythritol) hexa-acrylate (DPHA), ethoxylated trimethylolpropane triacrylate (EO-TMPTA), ethoxylated pentaerythritol tetraacrylate (PPTTA) and the combination of the aforementioned materials . The corrosion-resistant coating composition as described in item 1 of the patent application range, wherein the initiator is a photo-initiator, and the amount of the photo-initiator used accounts for 8 to 10 of the total weight of the anti-corrosion coating composition Weight percentage. The corrosion-resistant coating composition as described in item 6 of the patent application range, wherein the photoinitiator is selected from the group consisting of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl phenyl acetone, 2,4, The group consisting of 6-trimethylbenzyl diphenylphosphine oxide, benzophenone ether and the combination of the foregoing materials. The corrosion-resistant coating composition as described in item 1 of the patent application range, wherein the auxiliary agent includes a stabilizer, a coupling agent, a leveling agent, a defoaming agent, a dispersing agent, a thixotropic agent, or a combination of the foregoing materials. The corrosion-resistant coating composition as described in item 1 of the patent application range, wherein the amount of the additive used is 3 to 4 weight percent of the total weight of the corrosion-resistant coating composition. A corrosion-resistant aluminum-plastic film for lithium battery packaging, which includes a heat-resistant protective layer, an aluminum foil layer and a heat-sealing layer, wherein the heat-resistant protective layer is coated with the corrosion-resistant coating composition described in item 1 of the patent application A corrosion-resistant layer formed by the substance. The corrosion-resistant aluminum-plastic film as described in item 10 of the patent application range, wherein the thickness of the corrosion-resistant layer is between 1 micrometer (μm) and 8 micrometers (μm). The corrosion-resistant aluminum-plastic film as described in item 10 of the patent application range, wherein the thickness of the corrosion-resistant layer is between 3 microns (μm) and 5 microns (μm).