Electrolyte-resistant pressure-sensitive adhesive for new energy battery cells, preparation method thereof, adhesive tape, and test method for the adhesive tape

Abstract

This invention discloses an electrolytically resistant pressure-sensitive adhesive for new energy battery cells, its preparation method, the tape, and the testing method of the tape. The electrolytically resistant pressure-sensitive adhesive comprises the following raw material components by weight: 10-30 parts of soft monomer, 5-15 parts of hard monomer, 4-tert-butylcalix[6] aromatic hydrocarbon 4-6 parts, other functional monomers 1.5-6 parts, initiator 0.15-0.6 parts, crosslinking monomer 1-6 parts, and organic solvent 50-80 parts. By adding 4-tert-butylcalix[6] aromatic hydrocarbon to the pressure-sensitive adhesive, the electrolytically resistant pressure-sensitive adhesive prepared by this invention not only has excellent adhesion performance in high-temperature environments but also good stability in chemical environments. In the testing method provided by this invention, the performance of the electrolytically resistant pressure-sensitive adhesive tape is evaluated by assembling the tape into a button battery and then testing the redox curve, which can reflect the performance of the tape in actual application.

Description

Technical Field

[0001] This invention relates to the field of electrical engineering, and particularly to an electrolytically resistant hydraulic sensitive adhesive for new energy battery cells, its preparation method, the adhesive tape, and the testing method for the adhesive tape. Background Technology

[0002] With the rapid rise of basic industries such as energy, transportation, and communications, the lithium-ion battery industry is facing greater challenges after experiencing rapid growth. Adhesives, as a raw material in the battery industry, although used in small quantities, have a significant impact on battery performance and product quality. With the rapid development of the new energy industry, pressure-sensitive adhesives used in power lithium batteries are crucial materials in battery manufacturing, especially for fixing electrodes and separators and battery encapsulation. Considering safety and electrochemical stability, pressure-sensitive adhesives with excellent thermal and electrochemical stability are more suitable for lithium-ion batteries. Therefore, the development of pressure-sensitive adhesives that are resistant to high temperatures, solvents, and have high electrochemical stability is both necessary and challenging.

[0003] The solvent resistance of acrylic pressure-sensitive adhesives is mainly determined by the rigid structure of the molecular chain and special functional groups. Currently, electrolyte-resistant acrylic tapes come into contact with the highly polar electrolyte inside lithium-ion batteries during high-energy-density battery applications. Conventional acrylic tapes are prone to discoloration, yellowing, blackening, and carbonization, which not only contaminates the electrolyte but also seriously affects the performance and safety of lithium-ion batteries. Most current acrylic tape products improve chemical stability and electrolyte resistance by adjusting the molecular chain structure and doping with special functional groups, such as providing hydrophobic long-chain alkyl groups (-CH2-) and fluorinated groups (-CF3), or providing strong C / C, CO, or CN bonds for chemical stability. However, it is not clear whether there is an electrochemical reaction with the electrolyte components, thus affecting the overall performance of the lithium-ion battery.

[0004] Existing electrolyte-resistant acrylic pressure-sensitive adhesives rely solely on testing peel strength after immersion in electrolyte or analyzing mass changes after immersion to determine whether swelling or dissolution occurs. However, most electrolyte immersion tests are conducted in environments that are not truly oxygen-free or anhydrous, failing to exclude the influence of chemical changes in the electrolyte itself under normal air conditions. These testing methods can only serve as preliminary assessments of the tape's electrolyte resistance and cannot definitively indicate whether the tape undergoes an electrochemical reaction with the electrolyte components during actual application. This invention primarily provides an electrolyte-resistant pressure-sensitive adhesive tape product with high chemical and thermal stability for use in new energy battery cells. Its electrochemical stability is analyzed by assembling a button half-cell, allowing for better adaptation to the application and development of lithium-ion batteries. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing an electrolytically resistant hydraulic sensitive adhesive for new energy battery cells, its preparation method, the adhesive tape, and the testing method of the adhesive tape.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: In its first aspect, the present invention provides an electrolytically resistant hydraulic sensitive adhesive for new energy battery cells, comprising the following raw material components by weight:

[0007] 10-30 parts soft monomer, 5-15 parts hard monomer, 4-6 parts modified functional monomer, 1.5-6 parts other functional monomer, 0.15-0.6 parts initiator, 1-6 parts crosslinking monomer, and 50-80 parts organic solvent;

[0008] The modified functional monomer is 4-tert-butylcalix[6] aromatic hydrocarbon.

[0009] Preferably, the soft monomer is selected from one or more of ethyl acrylate, butyl acrylate, and isooctyl acrylate.

[0010] Preferably, the hard monomer is selected from one or more of methyl methacrylate, styrene, and acrylonitrile.

[0011] Preferably, the crosslinking monomer is selected from one or more of acrylic acid and methacrylic acid.

[0012] Preferably, the other functional monomers are selected from one or more of vinyltris(2-methoxyethoxy)silane, glycidyl methacrylate, and acrylmorpholine.

[0013] Preferably, the soft monomer is a mixture of isooctyl acrylate and ethyl acrylate, the hard monomer is methyl methacrylate, the crosslinking monomer is methacrylic acid, and the other functional monomers are vinyltris(2-methoxyethoxy)silane.

[0014] The organic solvent is a mixture of toluene and ethyl acetate.

[0015] A second aspect of the present invention provides a method for preparing the electrolytically resistant hydraulic sensitive adhesive for new energy battery cells as described above, comprising the following steps:

[0016] S1. Under an inert gas atmosphere, the soft monomer, hard monomer, crosslinking monomer, other functional monomers and organic solvent are mixed and stirred evenly. The initiator from the first part is added first, and the mixture is reacted at 67℃-70℃ for 1-2 hours to obtain the first reaction solution.

[0017] S2. Add the second part of the initiator to the first reaction solution and stir at 70℃-72℃ for 1.5h-3h to obtain the second reaction solution;

[0018] S3. Add 4-tert-butylcalix[6] aromatic hydrocarbon and the remaining initiator of the third part to the second reaction solution, stir and react at 75℃-80℃ for 3h-6h to obtain electrolytically resistant hydraulic sensitive adhesive with a solid content of 35-40%, a weight average molecular weight of 60w-80w, and a glass transition temperature of -25~-40℃.

[0019] In a third aspect, the present invention provides an electrolytically resistant hydraulic sensitive adhesive tape for new energy battery cells, which is prepared by the following method: the electrolytically resistant hydraulic sensitive adhesive for new energy battery cells as described above is mixed with a curing agent and pigment, stirred evenly, then uniformly coated on a substrate, a release film is attached to the adhesive surface, and cured to obtain the electrolytically resistant hydraulic sensitive adhesive tape for new energy battery cells.

[0020] Preferably, the electrolytic-resistant hydraulic sensitive adhesive tape for new energy battery cells is prepared by the following method: adding GA530 curing agent and inorganic blue pigment to the electrolytic-resistant hydraulic sensitive adhesive for new energy battery cells, stirring evenly, uniformly coating the resulting mixed adhesive onto aluminum foil, attaching a release film to the adhesive surface, and curing at 50-60℃ for 12-48 hours to obtain the electrolytic-resistant hydraulic sensitive adhesive tape for new energy battery cells;

[0021] The amounts of GA530 curing agent and inorganic blue pigment added are 0.5-2% and 2.5-10% of the total mass of the mixed adhesive, respectively.

[0022] A fourth aspect of the present invention provides a testing method for electrolytically resistant hydraulic sensitive tape for new energy battery cells as described above, comprising the following steps:

[0023] Using the electrolytically resistant hydraulic sensitive tape for new energy battery cells as the positive electrode material and lithium metal as the negative electrode material, a button half-cell is assembled. The redox curve of the button half-cell is then tested, and the electrochemical stability is determined based on the test results of the redox curve, thereby evaluating the performance of the electrolytically resistant hydraulic sensitive tape.

[0024] The beneficial effects of this invention are:

[0025] This invention provides an electrolytically resistant pressure-sensitive adhesive and tape product for new energy battery cells, as well as a testing method for the tape product. The 4-tert-butylcalix[6] aromatic hydrocarbon added to the electrolytically resistant pressure-sensitive adhesive of this invention is a macrocyclic compound consisting of six benzene rings connected together by shared carbon atoms, and also connected to six tert-butyl substituents. Its excellent cyclic structure gives the structure high thermal stability, that is, it can maintain stability at high temperatures, which makes it more durable when used in high-temperature environments. In addition, 4-tert-butylcalix[6] aromatic hydrocarbon also exhibits good chemical stability and is not easily reacted with acids, alkalis and other substances, which increases its safety and reliability. The electrolytically resistant pressure-sensitive adhesive prepared by adding 4-tert-butylcalix[6] aromatic hydrocarbon to the pressure-sensitive adhesive not only has excellent bonding performance in high-temperature environments, but also has good stability in chemical environments, making it very suitable for use as a pressure-sensitive adhesive for new energy battery cells.

[0026] In the testing method provided by this invention, the redox curve is tested after the tape is assembled into a button cell. The electrochemical stability is judged based on the test results of the redox curve, thereby evaluating the performance of the electrolytically resistant hydraulic sensitive tape. The evaluation results can reflect the performance of the tape in actual application. Attached Figure Description

[0027] Figure 1 The redox curves are for the batteries assembled in Test Examples 1-3. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to embodiments, so that those skilled in the art can implement it based on the description.

[0029] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0030] Unless otherwise specified, the experimental methods used in the following examples are conventional methods. Unless otherwise specified, the materials and reagents used in the following examples are commercially available. For examples where specific conditions are not specified, conventional conditions or conditions recommended by the manufacturer are followed. For reagents or instruments whose manufacturers are not specified, they are all commercially available products.

[0031] This invention provides an electrolytically resistant hydraulic sensitive adhesive for new energy battery cells, comprising the following raw material components in parts by weight:

[0032] 10-30 parts soft monomer, 5-15 parts hard monomer, 4-6 parts modified functional monomer, 1.5-6 parts other functional monomer, 0.15-0.6 parts initiator, 1-6 parts crosslinking monomer, and 50-80 parts organic solvent;

[0033] Among them, the modified functional monomer is 4-tert-butylcalix[6] aromatic hydrocarbon.

[0034] In a preferred embodiment, the soft monomer is selected from one or more of ethyl acrylate, butyl acrylate, and isooctyl acrylate.

[0035] In a preferred embodiment, the hard monomer is selected from one or more of methyl methacrylate, styrene, and acrylonitrile.

[0036] In a preferred embodiment, the crosslinking monomer is selected from one or more of acrylic acid and methacrylic acid.

[0037] In a preferred embodiment, the other functional monomers are selected from one or more of vinyltris(2-methoxyethoxy)silane, glycidyl methacrylate, and acrylmorpholine.

[0038] In a preferred embodiment, the soft monomer is a mixture of isooctyl acrylate and ethyl acrylate, the hard monomer is methyl methacrylate, the crosslinking monomer is methacrylic acid, and the other functional monomers are vinyltris(2-methoxyethoxy)silane.

[0039] In a preferred embodiment, the organic solvent is a mixture of toluene and ethyl acetate.

[0040] This invention also provides a method for preparing the electrolytically resistant hydraulic sensitive adhesive for new energy battery cells as described above, comprising the following steps:

[0041] S1. Under an inert gas atmosphere, the soft monomer, hard monomer, crosslinking monomer, other functional monomers and organic solvent are mixed and stirred evenly. The initiator from the first part is added first, and the mixture is reacted at 67℃-70℃ for 1-2 hours to obtain the first reaction solution.

[0042] S2. Add the second part of the initiator to the first reaction solution and stir at 70℃-72℃ for 1.5h-3h to obtain the second reaction solution;

[0043] S3. Add 4-tert-butylcalix[6] aromatic hydrocarbon and the remaining initiator of the third part to the second reaction solution, stir and react at 75℃-80℃ for 3h-6h to obtain electrolytically resistant hydraulic sensitive adhesive with a solid content of 35-40%, a weight average molecular weight of 60w-80w, and a glass transition temperature of -25~-40℃.

[0044] 4-tert-butylcalix[6]arene, as a macrocyclic compound, consists of six benzene rings linked together by shared carbon atoms, and also connected to six tert-butyl substituents. Its excellent cyclic structure gives it high thermal stability, meaning it can maintain stability at high temperatures, which makes it more durable in high-temperature applications. In addition, it also exhibits good chemical stability and is not easily reacted with acids, alkalis, etc., which increases its safety and reliability. Therefore, the electrolytically resistant hydraulic adhesive prepared in this invention not only has excellent bonding performance in high-temperature environments, but also good stability in chemical environments.

[0045] The present invention also provides an electrolytically resistant hydraulic sensitive adhesive tape for new energy battery cells, which is prepared by the following method: the electrolytically resistant hydraulic sensitive adhesive for new energy battery cells is mixed with a curing agent and pigment, stirred evenly, and then evenly coated on a substrate. A release film is then attached to the adhesive surface and cured to obtain the electrolytically resistant hydraulic sensitive adhesive tape for new energy battery cells.

[0046] In a preferred embodiment, the electrolytic-resistant hydraulic sensitive adhesive tape for new energy battery cells is prepared by the following method: GA530 curing agent and inorganic blue pigment are added to the electrolytic-resistant hydraulic sensitive adhesive for new energy battery cells, stirred evenly, the resulting mixed adhesive is evenly coated on aluminum foil, a release film is attached to the adhesive surface, and cured at 50-60℃ for 12-48h to obtain the electrolytic-resistant hydraulic sensitive adhesive tape for new energy battery cells.

[0047] The amounts of GA530 curing agent and inorganic blue pigment added are 0.5-2% and 2.5-10% of the total mass of the mixed adhesive, respectively.

[0048] This invention also provides a test method for the electrolytically resistant hydraulic sensitive tape used in new energy battery cells, comprising the following steps:

[0049] Electrolysis-resistant hydraulic sensitive tape, used in new energy battery cells, was used as the positive electrode material, and lithium metal was used as the negative electrode material to assemble a button half-cell. The redox curve of the button half-cell was then tested, and the electrochemical stability was determined based on the test results of the redox curve, thereby evaluating the performance of the electrolysis-resistant hydraulic sensitive tape.

[0050] The above is the general concept of the present invention. Based on this, detailed embodiments and comparative examples are provided below to further illustrate the present invention.

[0051] Raw material source description:

[0052] Isooctyl acrylate, ethyl acrylate, methyl methacrylate, and methacrylic acid were purchased from Shanghai Hechuang Chemical Co., Ltd.; 4-tert-butylcalix[6] aromatic hydrocarbon was purchased from Shanghai Yuanye Biotechnology Co., Ltd.; vinyltris(2-methoxyethoxy)silane was purchased from Nanjing Youpu Chemical Co., Ltd.; toluene and ethyl acetate were purchased from Qingdao Hefeng Chemical Co., Ltd., industrial grade; azobisisoheptanenitrile (ABVN) was purchased from Guoyao Reagent, analytical grade.

[0053] Example 1

[0054] An electrolytically resistant hydraulic sensitive adhesive for use in new energy battery cells, the preparation method of which includes the following steps:

[0055] The raw materials and their proportions are as follows:

[0056] Soft monomers: 10 parts isooctyl acrylate, 5 parts ethyl acrylate; Hard monomers: 10 parts methyl methacrylate; Crosslinking monomers: 5 parts methacrylic acid; Modified functional monomers: 5 parts 4-tert-butylcalix[6] aromatics; Other functional monomers: 4 parts vinyltris(2-methoxyethoxy)silane; Organic solvents: 11 parts toluene and 50 parts ethyl acetate; Initiator: 0.2 parts azobisisobutyronitrile.

[0057] S1. Under an inert gas atmosphere, mix the soft monomer, hard monomer, crosslinking monomer, other functional monomers and organic solvent according to the following ratio, stir evenly, add the initiator of the first part (specifically 1 / 4 of the total mass of azobisisoheptanenitrile), and react at 68℃ for 2 hours to obtain the first reaction solution.

[0058] S2. Add the second part of the initiator (specifically 1 / 4 of the total mass of azobisisoheptanenitrile) to the first reaction solution, stir at 72°C for 3 hours to obtain the second reaction solution;

[0059] S3. Add 4-tert-butylcalix[6] aromatic hydrocarbon and the remaining third part of the initiator (specifically, 1 / 2 of the total mass of azobisisoheptanenitrile) to the second reaction solution, stir and react at 80°C for 5 hours to obtain an electrolytically resistant hydraulic adhesive with a solid content of 38%, a weight-average molecular weight of 70w, and a glass transition temperature of -32°C.

[0060] An electrolytically resistant hydraulic sensitive adhesive tape for new energy battery cells is prepared by the following method: GA530 curing agent and inorganic blue pigment are added to the electrolytically resistant hydraulic sensitive adhesive for new energy battery cells, stirred evenly, and the resulting mixed adhesive is evenly coated on a 20μm aluminum foil. A release film is then attached to the adhesive surface, and the tape is cured at 55℃ for 24h to obtain the electrolytically resistant hydraulic sensitive adhesive tape for new energy battery cells.

[0061] The amounts of GA530 curing agent and inorganic blue pigment added are 1% and 5% of the total mass of the mixed adhesive, respectively.

[0062] Comparative Example 1

[0063] This example is basically the same as Example 1, except that in the preparation of the electrolytic hydraulic sensitive adhesive in this example, 4-tert-butylcalix[8] aromatic hydrocarbon is used instead of 4-tert-butylcalix[6] aromatic hydrocarbon in Example 1. The electrolytic hydraulic sensitive adhesive prepared in this example has a solid content of 36%, a weight-average molecular weight of 72w, and a glass transition temperature of -38℃.

[0064] Comparative Example 2

[0065] This example is basically the same as Example 1, except that in the preparation of the electrolytic hydraulic sensitive adhesive in this example, 4-tert-butylcalix[4] aromatic hydrocarbon is used instead of 4-tert-butylcalix[6] aromatic hydrocarbon in Example 1. The electrolytic hydraulic sensitive adhesive prepared in this example has a solid content of 35%, a weight-average molecular weight of 68w, and a glass transition temperature of -30℃.

[0066] Comparative Example 3

[0067] This example is basically the same as Example 1, except that 7 parts by weight of 4-tert-butylcalix[6] aromatic hydrocarbon were added in the preparation of the electrolytic hydraulic sensitive adhesive in this example. The solid content of the electrolytic hydraulic sensitive adhesive prepared in this example is 37%, the weight average molecular weight is 70w, and the glass transition temperature is -40℃.

[0068] Comparative Example 4

[0069] This example is basically the same as Example 1, except that 3 parts by weight of 4-tert-butylcalix[6] aromatic hydrocarbon were added in the preparation of the electrolytic hydraulic sensitive adhesive in this example. The solid content of the electrolytic hydraulic sensitive adhesive prepared in this example is 37%, the weight average molecular weight is 68w, and the glass transition temperature is -28℃.

[0070] Comparative Example 5

[0071] This example is basically the same as Example 1, except that 4-tert-butylcalix[6] aromatics were not added in the preparation of the electrolytic hydraulic sensitive adhesive in this example. The electrolytic hydraulic sensitive adhesive prepared in this example has a solid content of 36.5%, a weight-average molecular weight of 65w, and a glass transition temperature of -25℃.

[0072] The following performance tests were conducted on the electrolytically resistant hydraulic sensitive tapes prepared in Example 1 and Comparative Example 5:

[0073] 1. The standard for the 180° peel strength test is: Test standard: GB / T 2792-2014 Test for peel strength of adhesive tape;

[0074] 2. High temperature resistance is determined by the displacement change under holding force for 72 hours at high temperature. Holding force test standard: GB / T 4851-2014 Test method for holding force of adhesive tape.

[0075] 3. The test method for electrolyte resistance is as follows:

[0076] The adhesive layer of the tape was adhered to the aluminum sheet to prepare the test sample. The sample was then completely immersed in the electrolyte, which contained 1 mol of LiPF6 as the solute and ethylene carbonate: diethyl carbonate: methyl ethyl carbonate = 3:5:2 (volume ratio) as the solvent. The sample was soaked at 85°C for 8 hours and then cooled to room temperature. The 180° peel strength was then tested according to the national standard GB / T2792-2014.

[0077] The test results are shown in Table 1 below:

[0078] Table 1

[0079]

[0080]

[0081] According to the test results in Table 1, the tape of Example 1 has high peel strength, does not fall off or dissolve after being immersed in lithium-ion electrolyte at 85°C for 8 hours, and can maintain 40%-50% of its stickiness, indicating that it has excellent electrolyte resistance.

[0082] By comparing the results of Example 1 and Comparative Example 5, it can be seen that the modified polyacrylate prepared by adding 4-tert-butylcalix[6] aromatics has better peel performance and appearance before and after soaking in electrolyte, good high temperature resistance, and will not affect the use of the tape or the appearance of the electrolyte.

[0083] A comparison of the performance data between Example 1 and Comparative Examples 1 and 2 shows that the size of the added calixarene affects the product performance. Among them, 4-tert-butylcalix[6]arene has the best adhesive performance, high temperature resistance, and electrolyte resistance. For acrylic tape, the macrocyclic structure of 4-tert-butylcalix[8]arene in Comparative Example 1 is too large, which is not conducive to the cohesion of the tape. The macrocyclic structure of 4-tert-butylcalix[4]arene in Comparative Example 2 still has room for improvement. Therefore, 4-tert-butylcalix[6]arene is selected as the optimal choice. A comparison of the data between Example 1 and Comparative Examples 3 and 4 shows that the amount of 4-tert-butylcalix[6]arene added in Comparative Example 3 is too large, which will also affect the adhesive performance of the tape. The amount of additive in Comparative Example 4 is too small, and the electrolyte resistance decreases. The above results show that the structure and content of the macrocyclic substances added to the electrolytic hydraulic sensitive adhesive have a significant impact on the adhesive strength and electrolyte resistance of the adhesive layer.

[0084] The following tests were conducted on the redox curves of the electrolytically resistant hydraulic sensitive tapes from Examples 1, 1, and 5 after they were assembled into button cells to further evaluate their performance.

[0085] The redox curve was tested using the Shanghai Chenhua electrochemical workstation, cyclic voltammetry (CV) was selected, and the starting potential (2V) and ending potential (5V) were set, with a scan rate of 0.001V / s.

[0086] Test Example 1

[0087] The electrolytically resistant hydraulic sensitive tape prepared in Example 1 was used as the positive electrode material, lithium metal as the negative electrode material, and 1 mol of LiPF6 as the electrolyte. The solvent used in the electrolyte included ethylene carbonate: diethyl carbonate: methyl ethyl carbonate = 3:5:2 (volume ratio). The C2025 model button cell was assembled in a glove box, and then the redox curve (CV) of the C2025 model button cell was tested. The electrochemical stability was determined based on the test results of the redox curve, thereby evaluating the performance of the electrolytically resistant hydraulic sensitive tape.

[0088] Test Example 2

[0089] The electrolytically resistant hydraulic sensitive tape prepared in Comparative Example 1 was used as the positive electrode material, lithium metal as the negative electrode material, and 1 mol of LiPF6 as the electrolyte. The solvent used in the electrolyte included ethylene carbonate: diethyl carbonate: methyl ethyl carbonate = 3:5:2 (volume ratio). The C2025 model button cell was assembled in a glove box, and the redox curve (CV) of the C2025 model button cell was then tested. The electrochemical stability was determined based on the test results of the redox curve, thereby evaluating the performance of the electrolytically resistant hydraulic sensitive tape.

[0090] Test Example 3

[0091] The electrolytically resistant hydraulic sensitive tape prepared in Comparative Example 5 was used as the positive electrode material, lithium metal as the negative electrode material, and 1 mol of LiPF6 as the electrolyte. The solvent used in the electrolyte included ethylene carbonate: diethyl carbonate: methyl ethyl carbonate = 3:5:2 (volume ratio). The C2025 model button cell was assembled in a glove box, and the redox curve (CV) of the C2025 model button cell was then tested. The electrochemical stability was determined based on the test results of the redox curve, thereby evaluating the performance of the electrolytically resistant hydraulic sensitive tape.

[0092] The batteries assembled in Test Examples 1-3 were subjected to redox curve (CV) testing, and their electrochemical stability was determined by analyzing the redox peaks. The test results are as follows. Figure 1 As shown: (a) is test case 1, (b) is test case 2, and (c) is test case 3. Figure 1 Analysis shows that test example 3 showed an oxidation peak at 3.45V and a reduction peak at 3.93V, indicating that conventional acrylic tape has poor electrochemical stability and is not suitable for use in lithium-ion electrolyte scenarios. The CV curves of test example 1 did not show obvious oxidation-reduction peaks, indicating that adding 4-tert-butylcalix[6] and 4-tert-butylcalix[8] aromatics to polyacrylate can achieve high electrochemical stability. According to the test results in Table 1, adding 4-tert-butylcalix[6] aromatics to the electrolytically resistant hydraulic adhesive can obtain better bonding performance, so it is chosen as the choice of this invention.

[0093] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details.

Claims

1. A hydraulically sensitive adhesive resistant to electrolysis for use in new energy battery cells, characterized in that, Includes the following raw material components by weight: 10-30 parts soft monomer, 5-15 parts hard monomer, 4-6 parts modified functional monomer, 1.5-6 parts other functional monomer, 0.15-0.6 parts initiator, 1-6 parts crosslinking monomer, and 50-80 parts organic solvent; The modified functional monomer is 4-tert-butylcalix[6] aromatic hydrocarbon; The soft monomer is selected from one or more of ethyl acrylate, butyl acrylate, and isooctyl acrylate; The hard monomer is selected from one or more of methyl methacrylate, styrene, and acrylonitrile; Other functional monomers are selected from one or more of vinyltris(2-methoxyethoxy)silane, glycidyl methacrylate, and acrylmorpholine.

2. The electrolytically resistant hydraulic sensitive adhesive for new energy battery cells according to claim 1, characterized in that, The crosslinking monomer is selected from one or more of acrylic acid and methacrylic acid.

3. The electrolytically resistant hydraulic sensitive adhesive for new energy battery cells according to claim 1, characterized in that, The soft monomer is a mixture of isooctyl acrylate and ethyl acrylate, the hard monomer is methyl methacrylate, the crosslinking monomer is methacrylic acid, and the other functional monomers are vinyltris(2-methoxyethoxy)silane. The organic solvent is a mixture of toluene and ethyl acetate.

4. A method for preparing an electrolytically resistant hydraulic sensitive adhesive for new energy battery cells as described in any one of claims 1-3, characterized in that, Includes the following steps: S1. Under an inert gas atmosphere, the soft monomer, hard monomer, crosslinking monomer, other functional monomers and organic solvent are mixed and stirred evenly. The initiator from the first part is added first, and the mixture is reacted at 67℃-70℃ for 1-2 hours to obtain the first reaction solution. S2. Add the second part of the initiator to the first reaction solution and stir at 70℃-72℃ for 1.5h-3h to obtain the second reaction solution; S3. Add 4-tert-butylcalix[6] aromatic hydrocarbon and the remaining initiator of the third part to the second reaction solution, stir and react at 75℃-80℃ for 3h-6h to obtain electrolytically resistant hydraulic sensitive adhesive with a solid content of 35-40%, a weight average molecular weight of 60w-80w, and a glass transition temperature of -25~-40℃.

5. A hydraulically sensitive tape resistant to electrolysis for use in new energy battery cells, characterized in that, The following method is used to prepare the electrolytically resistant hydraulic sensitive adhesive for new energy battery cells as described in any one of claims 1-3, which is mixed with a curing agent and pigment, stirred evenly, and then evenly coated on a substrate. A release film is then attached to the adhesive surface and cured to obtain an electrolytically resistant hydraulic sensitive adhesive tape for new energy battery cells.

6. The electrolytically resistant hydraulic sensitive tape for new energy battery cells according to claim 5, characterized in that, The following method was used to prepare the electrolytic-resistant hydraulic sensitive adhesive tape for new energy battery cells: GA530 curing agent and inorganic blue pigment were added to the electrolytic-resistant hydraulic sensitive adhesive for new energy battery cells, and the mixture was stirred evenly. The resulting mixed adhesive was evenly coated on aluminum foil, and a release film was attached to the adhesive surface. The tape was cured at 50-60℃ for 12-48 hours to obtain the electrolytic-resistant hydraulic sensitive adhesive tape for new energy battery cells. The amounts of GA530 curing agent and inorganic blue pigment added are 0.5-2% and 2.5-10% of the total mass of the mixed adhesive, respectively.

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