An adhesive for sodium-ion batteries and its preparation method

Abstract

The present invention discloses an adhesive for sodium ion batteries and a preparation method thereof. The adhesive is prepared by polymerizing methyl methacrylate, butyl acrylate, acrylic acid and a modified prepolymer, then grafting with reinforced cellulose and dispersing in water. The modified prepolymer has a resinous structure, and the single-branch molecular weight contains a silicone segment, so that the prepared adhesive has a good heat resistance effect, and the adhesive will not decompose in a high-temperature environment. At the same time, the molecule contains a large number of carboxyl groups, which greatly improves the bonding strength of the adhesive. When compounded with reinforced cellulose, the prepared adhesive will not crack after multiple cycles, thereby ensuring the normal use of the electrode.

Description

Technical Field

[0001] The present invention relates to the technical field of battery adhesive preparation, and particularly relates to an adhesive for sodium-ion batteries and a preparation method thereof. Background Art

[0002] Due to the continuous construction and improvement of various facilities in human society, resources have been consumed in large quantities, causing serious environmental pollution. The development of new materials and clean energy is imperative. Lithium-ion batteries have played an increasingly important role in new energy due to their advantages such as high energy output and environmental friendliness. With the widespread use of electronic products such as mobile phones and electric vehicles, there is a strong market demand for new, efficient, energy-saving, and environmentally friendly batteries, and the market demand is also constantly expanding. The statistical results of Internet big data show that in the past half century, the energy consumption brought by transportation has accounted for the highest proportion of the global total resource consumption. Therefore, as one of the future development directions of batteries, sodium batteries have broad application prospects. Summary of the Invention

[0003] The purpose of the present invention is to provide an adhesive for sodium-ion batteries and a preparation method thereof, which solves the problems that the adhesive for sodium-ion batteries at the present stage has a general bonding effect and the electrode cannot work normally after being used multiple times.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A preparation method of an adhesive for sodium-ion batteries specifically includes the following steps:

[0006] Mix methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol evenly, introduce nitrogen protection, and react at a rotation speed of 150 - 200 r / min and a temperature of 85 - 90 °C for 3 - 5 h. Then distill off isopropanol, mix the substrate, reinforced cellulose and deionized water, and stir at a rotation speed of 200 - 300 r / min and a temperature of 50 - 60 °C for 6 - 8 h to obtain the adhesive for sodium-ion batteries.

[0007] Further, the dosage ratio of methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol is 5 g:8 g:3 g:15 g:1 g:100 mL, and the dosage ratio of the substrate, reinforced cellulose and deionized water is 10 g:1 g:22 - 25 mL.

[0008] Further, the modified prepolymer is prepared by the following steps:

[0009] Step A1: Add perfluorohexylethylmethyldiethoxysilane and dimethyldichlorosilane into deionized water. Under the conditions of a rotation speed of 200 - 300 r / min and a temperature of 25 - 30 °C, stir for 20 - 30 min, then add tetrahydrofuran and concentrated sulfuric acid, raise the temperature to 55 - 65 °C, keep warm for 5 - 10 min, add 1,1,3,3 - tetramethyldisiloxane, and react for 3 - 5 h to obtain Intermediate 1;

[0010] Step A2: Mix Intermediate 1, trimethylolpropane triacrylate, and xylene evenly. Under the conditions of a rotation speed of 200 - 300 r / min and a temperature of 50 - 60 °C, stir and add chloroplatinic acid, raise the temperature to 60 - 65 °C, react for 6 - 8 h, then add allyl alcohol to obtain Intermediate 2. Mix diethanolamine, acrylic acid, and toluene evenly. Under the conditions of a rotation speed of 150 - 200 r / min and a temperature of 30 - 40 °C, stir and add 1 - hydroxybenzotriazole, and react for 6 - 8 h to obtain Intermediate 3;

[0011] Step A3: Mix Intermediate 2, Intermediate 3, and 2,2 - dimethylolpropionic acid evenly. Under the conditions of a rotation speed of 200 - 300 r / min and a temperature of 80 - 85 °C, stir and add isophorone diisocyanate and dibutyltin dilaurate, and react for 2 - 3 h to obtain the modified prepolymer.

[0012] Furthermore, the dosage ratio of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water, and 1,1,3,3 - tetramethyldisiloxane described in Step A1 is 2 mmol: 3 mmol: 5 mL: 3 mmol, and the dosage of concentrated sulfuric acid is 5 - 8% of the sum of the masses of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water, and 1,1,3,3 - tetramethyldisiloxane.

[0013] Furthermore, the dosage ratio of Intermediate 1, trimethylolpropane triacrylate, and allyl alcohol described in Step A2 is n: 2n + 1: n + 2, where n is a natural number greater than 0, and the molar ratio of diethanolamine, acrylic acid, and 1 - hydroxybenzotriazole is 1: 1: 1.1.

[0014] Furthermore, the mass ratio of Intermediate 2, Intermediate 3, 2,2 - dimethylolpropionic acid, and isophorone diisocyanate described in Step A3 is 10: 3: 0.7: 6, and the dosage of dibutyltin dilaurate is 1‰.

[0015] Furthermore, the reinforced cellulose is prepared by the following steps:

[0016] Dissolve cellulose in dimethylacetamide, stir for 2 - 3 h under the conditions of a rotation speed of 150 - 200 r / min and a temperature of 115 - 125 °C, then cool down to 95 - 105 °C, add lithium chloride, stir until transparent, cool down to 5 - 10 °C, add triethylamine and p-toluenesulfonyl chloride, stir for 20 - 25 h, precipitate by adding to ice water and filter, dry the filter cake, dissolve it in dimethyl sulfoxide, add ethylenediamine, stir and process for 5 - 7 h under the conditions of a rotation speed of 300 - 500 r / min and a temperature of 100 - 110 °C, and then precipitate and dry the reactant in acetone to obtain the strengthened cellulose.

[0017] Furthermore, the dosage ratio of the cellulose, lithium chloride, triethylamine, p-toluenesulfonyl chloride and ethylenediamine is 1 g:2 g:3 mL:0.8 g:1 g.

[0018] The beneficial effects of the present invention: An adhesive for a sodium-ion battery prepared by the present invention is obtained by polymerizing methyl methacrylate, butyl acrylate, acrylic acid and a modified prepolymer, then grafting with strengthened cellulose and dispersing in water. The modified prepolymer uses perfluorohexylethylmethyldiethoxysilane and dimethyldichlorosilane as raw materials, first hydrolyzes and then polymerizes with 1,1,3,3-tetramethyldisiloxane to form a Si-H terminated polysiloxane, obtaining intermediate 1. React intermediate 1 with trimethylolpropane triacrylate. Through dosage control, the Si-H bond on one side of intermediate 1 reacts with the double bond on trimethylolpropane triacrylate, and then add allyl alcohol so that the double bond on allyl alcohol reacts with the Si-H bond on the other side to obtain intermediate 2. React diethanolamine and acrylic acid so that the carboxyl group on acrylic acid dehydrates and condenses with the imine on diethanolamine to obtain intermediate 3. React intermediate 2, intermediate 3, 2,2-dimethylolpropionic acid and isophorone diisocyanate to obtain the modified prepolymer. The strengthened cellulose uses cellulose as the raw material, first swells and dissolves the cellulose, then treats it with p-toluenesulfonyl chloride to obtain p-toluenesulfonylated cellulose, and then replaces the p-toluenesulfonyl group with diethylamine to introduce an amino group on the cellulose molecule to obtain the strengthened cellulose. The modified prepolymer has a resinous structure and contains an organosilicon segment in the single-branch molecular weight, so that the prepared adhesive has a good heat resistance effect, and the adhesive will not decompose in a high-temperature environment. At the same time, the molecule contains a large number of carboxyl groups, which greatly improves the bonding strength of the adhesive. When compounded with the strengthened cellulose, the prepared adhesive will not crack after multiple cycles, thus ensuring the normal use of the electrode. Specific embodiments

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1

[0021] A preparation method of an adhesive for sodium-ion batteries specifically includes the following steps:

[0022] Mix methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol evenly, introduce nitrogen protection, and react for 3 h under the conditions of a rotation speed of 150 r / min and a temperature of 85 °C. Then, distill off isopropanol. Mix the substrate, reinforced cellulose and deionized water, and stir for 6 h under the conditions of a rotation speed of 200 r / min and a temperature of 50 °C to obtain the adhesive for sodium-ion batteries.

[0023] The dosage ratios of methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol are 5 g: 8 g: 3 g: 15 g: 1 g: 100 mL, and the dosage ratios of the substrate, reinforced cellulose and deionized water are 10 g: 1 g: 22 mL.

[0024] The modified prepolymer is prepared by the following steps:

[0025] Step A1: Add perfluorohexylethylmethyldiethoxysilane and dimethyldichlorosilane to deionized water, stir for 20 min under the conditions of a rotation speed of 200 r / min and a temperature of 25 °C, then add tetrahydrofuran and concentrated sulfuric acid, raise the temperature to 55 °C, keep warm for 5 min, add 1,1,3,3-tetramethyldisiloxane, and react for 3 h to obtain Intermediate 1;

[0026] Step A2: Mix Intermediate 1, trimethylolpropane triacrylate and xylene evenly, stir and add chloroplatinic acid under the conditions of a rotation speed of 200 r / min and a temperature of 50 °C, raise the temperature to 60 °C, and react for 6 h. Then add allyl alcohol to obtain Intermediate 2. Mix diethanolamine, acrylic acid and toluene evenly, stir and add 1-hydroxybenzotriazole under the conditions of a rotation speed of 150 r / min and a temperature of 30 °C, and react for 6 h to obtain Intermediate 3;

[0027] Step A3: Mix Intermediate 2, Intermediate 3 and 2,2-dimethylolpropionic acid evenly, stir and add isophorone diisocyanate and dibutyltin dilaurate under the conditions of a rotation speed of 200 r / min and a temperature of 80 °C, and react for 2 h to obtain the modified prepolymer.

[0028] The dosage ratio of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water and 1,1,3,3-tetramethyldisiloxane described in step A1 is 2 mmol: 3 mmol: 5 mL: 3 mmol, and the dosage of concentrated sulfuric acid is 5% of the total mass of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water and 1,1,3,3-tetramethyldisiloxane.

[0029] The dosage ratio of intermediate 1, trimethylolpropane triacrylate and allyl alcohol described in step A2 is 1:3:3, and the molar ratio of diethanolamine, acrylic acid and 1-hydroxybenzotriazole is 1:1:1.1.

[0030] The mass ratio of intermediate 2, intermediate 3, 2,2-dimethylolpropionic acid and isophorone diisocyanate described in step A3 is 10:3:0.7:6, and the dosage of dibutyltin dilaurate is 1‰.

[0031] The reinforced cellulose is prepared by the following steps:

[0032] Dissolve cellulose in dimethylacetamide, stir for 2 h at a rotation speed of 150 r / min and a temperature of 115 °C, then cool down to 95 °C, add lithium chloride, stir until transparent, cool down to 5 °C, add triethylamine and p-toluenesulfonyl chloride, stir for 20 h, precipitate and filter in ice water, dry the filter cake, dissolve it in dimethyl sulfoxide, add ethylenediamine, stir and process for 5 h at a rotation speed of 300 r / min and a temperature of 100 °C, and then precipitate and dry the reactant in acetone to obtain the reinforced cellulose.

[0033] The dosage ratio of the cellulose, lithium chloride, triethylamine, p-toluenesulfonyl chloride and ethylenediamine is 1 g: 2 g: 3 mL: 0.8 g: 1 g.

[0034] Example 2

[0035] A preparation method of an adhesive for sodium-ion batteries specifically includes the following steps:

[0036] Mix methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol evenly, introduce nitrogen protection, react for 4 h at a rotation speed of 180 r / min and a temperature of 90 °C, then distill and remove isopropanol, mix the substrate, reinforced cellulose and deionized water, and stir for 7 h at a rotation speed of 200 r / min and a temperature of 55 °C to obtain the adhesive for sodium-ion batteries.

[0037] The dosage ratio of methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol is 5 g: 8 g: 3 g: 15 g: 1 g: 100 mL, and the dosage ratio of substrate, reinforced cellulose and deionized water is 10 g: 1 g: 23 mL.

[0038] The modified prepolymer is prepared by the following steps:

[0039] Step A1: Add perfluorohexylethylmethyldiethoxysilane and dimethyldichlorosilane into deionized water. Under the conditions of a rotation speed of 200 r / min and a temperature of 30 °C, after stirring for 25 min, add tetrahydrofuran and concentrated sulfuric acid, raise the temperature to 60 °C, keep warm for 8 min, add 1,1,3,3-tetramethyldisiloxane, and carry out the reaction for 4 h to obtain Intermediate 1;

[0040] Step A2: Mix Intermediate 1, trimethylolpropane triacrylate and xylene evenly. Under the conditions of a rotation speed of 200 r / min and a temperature of 55 °C, stir and add chloroplatinic acid, raise the temperature to 63 °C, after reacting for 7 h, add allyl alcohol to obtain Intermediate 2. Mix diethanolamine, acrylic acid and toluene evenly. Under the conditions of a rotation speed of 180 r / min and a temperature of 35 °C, stir and add 1-hydroxybenzotriazole, and carry out the reaction for 7 h to obtain Intermediate 3;

[0041] Step A3: Mix Intermediate 2, Intermediate 3 and 2,2-dimethylolpropionic acid evenly. Under the conditions of a rotation speed of 200 r / min and a temperature of 83 °C, stir and add isophorone diisocyanate and dibutyltin dilaurate, and carry out the reaction for 3 h to obtain the modified prepolymer.

[0042] The dosage ratio of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water and 1,1,3,3-tetramethyldisiloxane described in Step A1 is 2 mmol: 3 mmol: 5 mL: 3 mmol, and the dosage of concentrated sulfuric acid is 6% of the sum of the masses of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water and 1,1,3,3-tetramethyldisiloxane.

[0043] The dosage ratio of Intermediate 1, trimethylolpropane triacrylate and allyl alcohol described in Step A2 is 2:5:4, n is a natural number greater than 0, and the molar ratio of diethanolamine, acrylic acid and 1-hydroxybenzotriazole is 1:1:1.1.

[0044] The mass ratio of Intermediate 2, Intermediate 3, 2,2-dimethylolpropionic acid and isophorone diisocyanate described in Step A3 is 10:3:0.7:6, and the dosage of dibutyltin dilaurate is 1‰.

[0045] The enhanced cellulose described above is prepared by the following steps:

[0046] Dissolve cellulose in dimethylacetamide. Under the conditions of a rotation speed of 150 r / min and a temperature of 120 °C, stir for 3 h, then cool down to 100 °C, add lithium chloride, stir until transparent, cool down to 8 °C, add triethylamine and p-toluenesulfonyl chloride, stir for 23 h, precipitate by adding to ice water and filter. Dry the filter cake, dissolve it in dimethyl sulfoxide, add ethylenediamine, under the conditions of a rotation speed of 300 r / min and a temperature of 105 °C, stir and process for 6 h, then precipitate the reactant in acetone and dry to obtain the enhanced cellulose.

[0047] The dosage ratio of the cellulose, lithium chloride, triethylamine, p-toluenesulfonyl chloride and ethylenediamine is 1 g: 2 g: 3 mL: 0.8 g: 1 g.

[0048] Example 3

[0049] A preparation method of an adhesive for a sodium-ion battery specifically includes the following steps:

[0050] Mix methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol evenly, introduce nitrogen protection, under the conditions of a rotation speed of 200 r / min and a temperature of 90 °C, react for 5 h, then distill to remove isopropanol. Mix the substrate, enhanced cellulose and deionized water, under the conditions of a rotation speed of 300 r / min and a temperature of 60 °C, stir for 8 h to obtain the adhesive for a sodium-ion battery.

[0051] The dosage ratio of the methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol is 5 g: 8 g: 3 g: 15 g: 1 g: 100 mL, and the dosage ratio of the substrate, enhanced cellulose and deionized water is 10 g: 1 g: 25 mL.

[0052] The modified prepolymer is prepared by the following steps:

[0053] Step A1: Add perfluorohexylethylmethyldiethoxysilane and dimethyldichlorosilane to deionized water. Under the conditions of a rotation speed of 300 r / min and a temperature of 30 °C, stir for 30 min, then add tetrahydrofuran and concentrated sulfuric acid, heat up to 65 °C, keep warm for 10 min, add 1,1,3,3-tetramethyldisiloxane, and react for 5 h to obtain Intermediate 1;

[0054] Step A2: Mix intermediate 1, trimethylolpropane triacrylate, and xylene evenly. Under the conditions of a rotation speed of 300 r / min and a temperature of 60 °C, stir and add chloroplatinic acid. Then raise the temperature to 65 °C and react for 8 h. After that, add allyl alcohol to obtain intermediate 2. Mix diethanolamine, acrylic acid, and toluene evenly. Under the conditions of a rotation speed of 200 r / min and a temperature of 40 °C, stir and add 1-hydroxybenzotriazole and react for 8 h to obtain intermediate 3;

[0055] Step A3: Mix intermediate 2, intermediate 3, and 2,2-dimethylolpropionic acid evenly. Under the conditions of a rotation speed of 300 r / min and a temperature of 85 °C, stir and add isophorone diisocyanate and dibutyltin dilaurate, and react for 3 h to obtain a modified prepolymer.

[0056] The dosage ratio of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water, and 1,1,3,3-tetramethyldisiloxane described in Step A1 is 2 mmol: 3 mmol: 5 mL: 3 mmol, and the dosage of concentrated sulfuric acid is 8% of the total mass of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water, and 1,1,3,3-tetramethyldisiloxane.

[0057] The dosage ratio of intermediate 1, trimethylolpropane triacrylate, and allyl alcohol described in Step A2 is 3:7:5, and the molar ratio of diethanolamine, acrylic acid, and 1-hydroxybenzotriazole is 1:1:1.1.

[0058] The mass ratio of intermediate 2, intermediate 3, 2,2-dimethylolpropionic acid, and isophorone diisocyanate described in Step A3 is 10:3:0.7:6, and the dosage of dibutyltin dilaurate is 1‰.

[0059] The reinforced cellulose described above is prepared by the following steps:

[0060] Dissolve cellulose in dimethylacetamide. Under the conditions of a rotation speed of 200 r / min and a temperature of 125 °C, stir for 3 h, then cool down to 105 °C, add lithium chloride, stir until transparent, cool down to 10 °C, add triethylamine and p-toluenesulfonyl chloride, stir for 25 h, precipitate in ice water and filter. Dry the filter cake, dissolve it in dimethyl sulfoxide, add ethylenediamine, and under the conditions of a rotation speed of 500 r / min and a temperature of 110 °C, stir and process for 7 h. Then precipitate the reactant in acetone and dry to obtain reinforced cellulose.

[0061] The dosage ratio of the cellulose, lithium chloride, triethylamine, p-toluenesulfonyl chloride, and ethylenediamine described above is 1 g: 2 g: 3 mL: 0.8 g: 1 g.

[0062] Comparative Example 1

[0063] In this comparative example, no reinforcing cellulose was added compared with Example 1, and the remaining steps were the same.

[0064] Comparative Example 2

[0065] In this comparative example, compared with Example 1, a modified prepolymer, reinforcing cellulose and deionized water were directly mixed to prepare an adhesive, and the remaining steps were the same.

[0066] The adhesives prepared in Examples 1-3 and Comparative Examples 1-2 were respectively used for bonding aluminum foil and PET, and the layers were press-bonded through the adhesive. Under the condition that the peeling speed was 30 cm / min, the peeling strength was tested. 0.2 g of conductive agent Super-P and 9.5 g of artificial graphite with a specific capacity of 360 mAh / g were added to 10 mL of the adhesives prepared in Examples 1-3 and Comparative Examples 1-2 respectively. After mixing, it was coated on a copper foil to obtain an electrode sheet, and then transferred to a glove box to assemble a button battery. The electrolyte was 1M NaPF 6 EC / DMC mixed solution (volume ratio 1:1). An electrochemical performance test was carried out on the obtained button battery using a battery test system model CT2001A produced by Wuhan Blue Electronic Co., Ltd. The discharge cut-off voltage of the test conditions was 0.005V, the charge cut-off voltage was 1V, and the charge-discharge rate was 0.5C. The results are shown in the following table.

[0067]

[0068] It can be seen from the above table that this application has good bonding strength and can extend the service life of the battery.

[0069] The above content is only an example and illustration of the concept of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the concept of the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. Preparation method of an adhesive for sodium-ion batteries, characterized in that: specifically includes the following steps: Mix methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol evenly, introduce nitrogen protection, after reaction, distill off isopropanol, mix the substrate, reinforced cellulose and deionized water, and carry out stirring treatment to obtain an adhesive for sodium-ion batteries; The modified prepolymer is prepared by the following steps: Step A1: Add perfluorohexylethylmethyldiethoxysilane and dimethyldichlorosilane into deionized water, after stirring treatment, add tetrahydrofuran and concentrated sulfuric acid, raise the temperature and keep warm, add 1,1,3,3-tetramethyldisiloxane, and carry out reaction to obtain intermediate 1; Step A2: Mix and stir intermediate 1, trimethylolpropane triacrylate and xylene and add chloroplatinic acid, after raising the temperature and reacting, add allyl alcohol to obtain intermediate 2, mix and stir diethanolamine, acrylic acid and toluene and add 1-hydroxybenzotriazole, and carry out reaction to obtain intermediate 3; Step A3: Mix and stir intermediate 2, intermediate 3, 2,2-dimethylolpropionic acid and add isophorone diisocyanate and dibutyltin dilaurate, and carry out reaction to obtain a modified prepolymer; The reinforced cellulose is prepared by the following steps: Dissolve cellulose in dimethylacetamide, after stirring treatment, lower the temperature and add lithium chloride, stir until transparent, lower the temperature again and add triethylamine and p-toluenesulfonyl chloride, carry out stirring treatment, precipitate and filter in ice water, dry the filter cake, dissolve it in dimethyl sulfoxide, add ethylenediamine, after stirring treatment, precipitate the reactant in acetone and dry it to obtain reinforced cellulose.

2. The preparation method of an adhesive for sodium-ion batteries according to claim 1, characterized in that: The dosage ratio of methyl methacrylate, butyl acrylate, acrylic acid, modified prepolymer, azobisisobutyronitrile and isopropanol is 5g:8g:3g:15g:1g:100mL, and the dosage ratio of the substrate, reinforced cellulose and deionized water is 10g:1g:22 - 25mL.

3. The preparation method of an adhesive for sodium-ion batteries according to claim 1, characterized in that: The dosage ratio of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water and 1,1,3,3-tetramethyldisiloxane in step A1 is 2mmol:3mmol:5mL:3mmol, and the dosage of concentrated sulfuric acid is 5% of the sum of the masses of perfluorohexylethylmethyldiethoxysilane, dimethyldichlorosilane, deionized water and 1,1,3,3-tetramethyldisiloxane.

4. The preparation method of an adhesive for sodium-ion batteries according to claim 1, characterized in that: The dosage ratio of intermediate 1, trimethylolpropane triacrylate and allyl alcohol in step A2 is n:(2n + 1):(n + 2), where n is a natural number greater than 0, and the molar ratio of diethanolamine, acrylic acid and 1-hydroxybenzotriazole is 1:1:1.

1.

5. The preparation method of an adhesive for sodium-ion batteries according to claim 1, characterized in that: The mass ratio of intermediate 2, intermediate 3, 2,2-dimethylolpropionic acid and isophorone diisocyanate described in step A3 is 10:3:0.7:6, and the dosage of dibutyltin dilaurate is 1‰.

6. The preparation method of an adhesive for a sodium-ion battery according to claim 1, characterized in that: The dosage ratio of the cellulose, lithium chloride, triethylamine, p-toluenesulfonyl chloride and ethylenediamine is 1 g: 2 g: 3 mL: 0.8 g: 1 g.

7. An adhesive for a sodium-ion battery, characterized in that: It is prepared according to the preparation method described in any one of claims 1-6.

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