Hyperbranched organic silicon resin and preparation method thereof, ink-jet ink and lithium battery

Abstract

The invention provides hyperbranched organic silicon resin and a preparation method thereof, ink-jet ink and a lithium battery. Wherein the resin has a structure as shown in a formula I in the specification; wherein R1 is selected from any one of alkyl and halogenated alkyl; r2 is selected from any one of H, alkyl and halogenated alkyl; r3 and R4 are respectively and independently selected from any one of H, halogen, alkyl, cycloalkyl and aryl; r5 is selected from any one of H and alkyl; x is a group selected from the following general formula; wherein L1 and L2 are respectively and independently selected from a single bond, an alkylene group and an alkoxyalkylene group; q1 is an ethylenically unsaturated group; and Q2 is an oxygen-containing heterocyclic group. The prepared resin has the characteristics of low viscosity, high light curing reaction activity, excellent electrolyte resistance and good high-temperature and high-humidity resistance, and the technical problem that the traditional insulating material cannot meet the requirements of high-voltage insulation and electrolyte corrosion resistance at the same time is effectively solved.

Description

Technical Field

[0001] This application relates to the field of polymer materials technology, specifically to hyperbranched organosilicon resins and their preparation methods, inkjet inks, and lithium batteries. Background Technology

[0002] With the rapid development of the new energy vehicle industry, improving charging efficiency has become a key industry requirement. To meet the requirements of fast charging, the voltage platform of on-board charging piles has gradually increased from the traditional 200V-400V range to 800V or even higher. This trend towards higher voltage has placed more stringent requirements on the insulation and safety performance of power battery systems. As a key insulating material inside the battery module, the battery wrapping tape needs to have higher electrical strength, and its withstand voltage level needs to be increased from the traditional approximately 2700V DC to above 5400V DC. The breakdown voltage also needs to be increased from the conventional 2.5kV to 3kV-4kV to ensure the long-term safe and stable operation of the battery system under high-voltage conditions.

[0003] Currently, the traditional blue wrapping tape widely used inside battery packs is no longer adequate for the requirements of high-voltage platforms. On one hand, its insulation strength is insufficient, posing a risk of high-voltage breakdown; on the other hand, the tape is mostly a semi-solid structure with poor resistance to chemical corrosion. When electrolyte leakage occurs, the tape cannot effectively protect the battery's aluminum casing, creating safety hazards due to casing corrosion.

[0004] UV-curable silicone resins are considered potential high-performance insulating materials due to their excellent hydrophobicity, heat resistance, and weather resistance. However, existing commercially available UV silicone resins still have significant shortcomings: their electrolyte resistance is generally poor, and they are prone to swelling, softening, or interface peeling after contact with battery electrolytes. They are difficult to maintain reliable insulation and protection functions under leakage conditions, and therefore are not suitable for insulating and wrapping applications of high-voltage lithium batteries.

[0005] Therefore, developing a novel UV-cured silicone resin that combines high insulation strength with excellent electrolyte resistance is of great significance for ensuring the safety of high-voltage power battery systems and has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a hyperbranched silicone resin, its preparation method, inkjet ink, and lithium batteries. This invention organically combines a specific "umbrella-like" molecular structure with a hyperbranched silicone resin, resulting in a resin that possesses low viscosity, high photocuring reactivity, excellent electrolyte resistance, and good high-temperature and high-humidity resistance. This effectively overcomes the technical challenge of traditional insulating materials failing to simultaneously meet the requirements of high-voltage insulation and electrolyte corrosion resistance.

[0007] To achieve the above objectives, in a first aspect, the present invention provides a hyperbranched organosilicon resin having the structure shown in Formula I: ; Wherein, R1 is selected from any one of alkyl and haloalkyl; R2 is selected from any one of H, alkyl, and haloalkyl; R3 and R4 are each independently selected from any one of H, halogen, alkyl, cycloalkyl, and aryl; R5 is selected from any one of H and alkyl. X is a group selected from the following general formulas: , ; Among them, L1 and L2 are independently selected from single bonds, alkylene groups, and alkoxyalkylene groups, respectively; Q1 is an olefinic unsaturated group; Q2 is an oxygen-containing heterocyclic group.

[0008] Preferably, the alkyl groups in R1, R2, R3, R4, and R5 are each independently selected from C1-C5 alkyl groups; the haloalkyl groups in R1 and R2 are each independently selected from C1-C5 haloalkyl groups; the cycloalkyl groups in R3 and R4 are each independently selected from C3-C6 cycloalkyl groups; and the aryl groups in R3 and R4 are each independently selected from substituted or unsubstituted C6-C40 phenyl groups.

[0009] Preferably, when X is In this case, L1 is selected from hydrogen-bonded, C1-C5 alkylene groups; When X is In this case, L2 is selected from C2-C10 alkylene groups and C2-C10 alkoxyalkylene groups.

[0010] Preferably, X is selected from the following groups: .

[0011] Preferably, the hyperbranched silicone resin is selected from the following compounds: ,

[0012] , .

[0013] Secondly, the present invention provides a method for preparing the above-mentioned hyperbranched organosilicon resin, which includes the following steps: The hyperbranched organosilicon resin is obtained by polycondensation reaction of diol and silane coupling agent under heating conditions. The hyperbranched silicone resin has the structure shown in Formula I: ; Wherein, R1 is selected from any one of alkyl and haloalkyl; R2 is selected from any one of H, alkyl, and haloalkyl; R3 and R4 are each independently selected from any one of H, halogen, alkyl, cycloalkyl, and aryl; R5 is selected from any one of H and alkyl. X is a group selected from the following general formulas: , ; Among them, L1 and L2 are independently selected from single bonds, alkylene groups, and alkoxyalkylene groups, respectively; Q1 is an olefinic unsaturated group; Q2 is an oxygen-containing heterocyclic group.

[0014] Preferably, the diol comprises one of 2,4-pentanediol, 2-methyl-2,4-pentanediol, 2,4-dimethyl-2,4-pentanediol, (2S,4S)-2,4-pentanediol, (R,R)-(-)-2,4-pentanediol, (R)-(-)-2-methyl-2,4-pentanediol, and 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol; The silane coupling agent includes one of KH560 and KH570.

[0015] Preferably, the molar ratio of the silane coupling agent to the diol is 1-1.36.

[0016] Thirdly, the present invention also provides the application of the above-mentioned hyperbranched silicone resin or the hyperbranched silicone resin prepared by the above method in inkjet inks.

[0017] Furthermore, the present invention also provides the application of the thin film formed by the above-described inkjet ink in lithium batteries.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) Excellent resistance to electrolyte: The photocurable hyperbranched silicone resin designed by solvent-free synthesis introduces "umbrella-shaped" alkyl chains into the molecular structure, which can effectively cover and seal the pores formed during the polymer film formation process after photocuring, significantly improving the coating's resistance to electrolyte immersion and avoiding performance degradation caused by electrolyte penetration.

[0019] (2) High processing adaptability and stability: This hyperbranched silicone resin has a low viscosity, which makes it easy to add in a high proportion in ink systems, enhancing the adjustability and applicability of the formulation. At the same time, the siloxane structure in the resin endows the material with good high temperature and high humidity resistance, flame retardancy and certain hydrophobic and oleophobic properties, which helps to improve the durability and safety of the coating in harsh environments.

[0020] (3) Comprehensive performance synergistic improvement: By organically combining the "umbrella-shaped" alkyl chain with hyperbranched organosilicon resin, the electrolyte resistance is further enhanced while maintaining the high mechanical strength and environmental resistance of the photocurable coating. This expands the application potential of the material in the new energy field (such as lithium battery packaging, electrode protection, etc.), and has important practical value and promotion prospects. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 Image of a sample printed with a blue film resistant to electrolyte. Detailed Implementation

[0023] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0024] This invention provides a hyperbranched organosilicon resin having the structure shown in Formula I: ; Wherein, R1 is selected from any one of alkyl and haloalkyl; R2 is selected from any one of H, alkyl, and haloalkyl; R3 and R4 are each independently selected from any one of H, halogen, alkyl, cycloalkyl, and aryl; R5 is selected from any one of H and alkyl. X is a group selected from the following general formulas: , ; Among them, L1 and L2 are independently selected from single bonds, alkylene groups, and alkoxyalkylene groups, respectively; Q1 is an olefinic unsaturated group; Q2 is an oxygen-containing heterocyclic group.

[0025] In some embodiments, the alkyl group in R1, the alkyl group in R2, the alkyl group in R3, the alkyl group in R4, and the alkyl group in R5 are each independently selected from C1-C5 alkyl groups; the haloalkyl group in R1 and the haloalkyl group in R2 are each independently selected from C1-C5 haloalkyl groups; the cycloalkyl group in R3 and the cycloalkyl group in R4 are each independently selected from C3-C6 cycloalkyl groups; and the aryl group in R3 and the aryl group in R4 are each independently selected from substituted or unsubstituted C6-C40 phenyl groups.

[0026] In some embodiments, when X is In this case, L1 is selected from hydrogen-bonded, C1-C5 alkylene groups; When X is In this case, L2 is selected from C2-C10 alkylene groups and C2-C10 alkoxyalkylene groups.

[0027] In some embodiments, the C2-C10 alkylene groups in L2 are selected from methylene, ethylene, n-propylene, isopropylene, n-butylene, sec-butylene, isobutylene, tert-butylene, pentylene, and isopentylene; the alkylene groups in L2 are selected from... , .

[0028] It should be noted that in this invention, the expression Ca-Cb represents that the group has ab carbon atoms. Unless otherwise specified, this number of carbon atoms generally includes the number of carbon atoms of the substituents. Examples of C1-C5 alkyl groups in this specification include: methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, pentyl, and isopentyl. Examples of C1-C5 alkylene groups include: methylene, ethylene, propylene, butylene, and pentylene.

[0029] In some embodiments, X is selected from the following groups: .

[0030] In some embodiments, the hyperbranched silicone resin is selected from the following compounds: ,

[0031] , .

[0032] This application further provides a method for preparing the above-mentioned hyperbranched organosilicon resin, which includes the following steps: The hyperbranched organosilicon resin is obtained by polycondensation reaction of diol and silane coupling agent under heating conditions. The hyperbranched silicone resin has the structure shown in Formula I: ; Wherein, R1 is selected from any one of alkyl and haloalkyl; R2 is selected from any one of H, alkyl, and haloalkyl; R3 and R4 are each independently selected from any one of H, halogen, alkyl, cycloalkyl, and aryl; R5 is selected from any one of H and alkyl. X is a group selected from the following general formulas: , ; Among them, L1 and L2 are independently selected from single bonds, alkylene groups, and alkoxyalkylene groups, respectively; Q1 is an olefinic unsaturated group; Q2 is an oxygen-containing heterocyclic group.

[0033] The preparation method of the present invention is carried out under solvent-free and catalyst-free conditions, which simplifies the post-processing of the reaction. Furthermore, since the use of conventional catalysts such as alkaline catalysts is avoided, the occurrence of side reactions such as hydrolysis of silane coupling agents can be reduced.

[0034] It is worth mentioning that, in this embodiment of the invention, an "umbrella-like" alkyl chain was constructed in the resin molecule by using a diol. This structure can effectively shield the film-forming pores after photocuring, which significantly improves the coating's resistance to electrolyte immersion and thus avoids performance degradation.

[0035] In some embodiments, the diol includes one of 2,4-pentanediol, 2-methyl-2,4-pentanediol, 2,4-dimethyl-2,4-pentanediol, (2S,4S)-2,4-pentanediol, (R,R)-(-)-2,4-pentanediol, (R)-(-)-2-methyl-2,4-pentanediol, and 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol; The silane coupling agent includes one of KH560 and KH570.

[0036] In some embodiments, the molar ratio of the silane coupling agent to the diol is 1-1.36, for example, it can be 1, 1.1, 1.2, 1.3, or 1.36.

[0037] This application also provides the application of the above-described hyperbranched silicone resin or the hyperbranched silicone resin prepared by the above method in inkjet inks.

[0038] In some embodiments, the product comprises the following components, by weight: 45-60 parts hyperbranched silicone resin, 33-52 parts acrylic acid diluent monomer, 3-7 parts photoinitiator, 2-5 parts blue pigment.

[0039] Furthermore, embodiments of this application also provide the application of the thin film formed by the above-described inkjet ink in lithium batteries.

[0040] To further illustrate the technical effects of the present invention, the following specific embodiments are also provided.

[0041] Example 1 Example 1 provides a hyperbranched organosilicon resin N1. The preparation method of Example 1 includes: Weigh 49.67 g KH570 and 20.83 g 2,4-pentanediol into a 200 mL single-necked flask, add a magnetic stir bar, attach a reflux device, and stir for 0.5 h under nitrogen atmosphere; then, slowly heat to 100 ℃ and react for 1 h. Subsequently, the temperature was raised to 170 °C and the reaction was maintained for 3 h. After the reaction was completed, the temperature was lowered, the material was extracted and discharged, and the byproducts were washed away with water to obtain UV-resistant electrolyte-resistant hyperbranched organosilicon resin N1 (compound 1).

[0042] The hyperbranched silicone resin N1 has a number-average molecular weight of 1749, a PDI of 1.45, and a viscosity of 289 cPs at 25 ℃.

[0043] Example 1 also provides a UV inkjet ink that can be used in the lithium battery industry, the UV inkjet ink comprising the following components: 45 parts of hyperbranched silicone resin N1, 33 parts of acrylic acid diluent monomer, 3 parts of photoinitiator, and 2 parts of blue pigment were used to prepare a UV inkjet ink with a viscosity of 93 cPs @ 25 ℃. The inkjet ink was printed on an aluminum substrate using an inkjet printer, and the printed film thickness was about 110 μm. After UV curing, a blue film was obtained. The film was immersed in lithium hexafluorophosphate electrolyte at 85 ℃ and could withstand 1.5 h without any abnormalities.

[0044] Example 2 Example 2 provides a hyperbranched organosilicon resin N2 (compound 2). The preparation method of Example 2 is basically the same as that of Example 1, except that: The silane coupling agent used was 47.27 g KH560, and the diol used was 32.14 g 2-methyl-2,4-pentanediol.

[0045] The hyperbranched silicone resin N2 has a number-average molecular weight of 2044, a PDI of 1.33, and a viscosity of 314 cPs at 25 ℃.

[0046] Example 2 also provides a UV inkjet ink that can be used in the lithium battery industry, the UV inkjet ink comprising the following components: The UV inkjet ink, prepared with 50 parts of hyperbranched silicone resin N2, 35 parts of acrylic acid diluent monomer, 4 parts of photoinitiator, and 3 parts of blue pigment, has a viscosity of 98 cPs @ 25 ℃. Samples were printed on an aluminum substrate using an inkjet printer, producing a film thickness of approximately 110 μm. After UV curing, a blue film was obtained. Immersion in lithium hexafluorophosphate electrolyte at 85 ℃ showed no abnormalities after 3 hours.

[0047] Example 3 Example 3 provides a hyperbranched organosilicon resin N3 (compound 3). The preparation method of Example 3 is basically the same as that of Example 1, except that: The silane coupling agent used was 49.67 g KH570, and the diol used was 35.96 g 2,4-dimethyl-2,4-pentanediol.

[0048] The hyperbranched silicone resin N3 has a number-average molecular weight of 1594, a PDI of 1.35, and a viscosity of 271 cPs at 25 ℃.

[0049] Example 3 also provides a UV inkjet ink that can be used in the lithium battery industry, the UV inkjet ink comprising the following components: 45 parts of hyperbranched silicone resin N3, 33 parts of acrylic acid diluent monomer, 3 parts of photoinitiator, and 3 parts of blue pigment were used to prepare a UV inkjet ink with a viscosity of 82 cPs @ 25 ℃. The inkjet ink was printed on an aluminum substrate using an inkjet printer, and the printed film thickness was about 110 μm. After UV curing, a blue film was obtained. The film was immersed in lithium hexafluorophosphate electrolyte at 85 ℃ and could withstand 3.5 h without any abnormalities.

[0050] Example 4 Example 4 provides a hyperbranched organosilicon resin N4 (compound 4). The preparation method of Example 4 is basically the same as that of Example 1, except that: The silane coupling agent used was 49.67 g KH570, and the diol used was 61.50 g 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol.

[0051] The hyperbranched silicone resin N4 has a number-average molecular weight of 1948, a PDI of 1.41, and a viscosity of 354 cPs at 25 ℃.

[0052] Example 4 also provides a UV inkjet ink that can be used in the lithium battery industry, the UV inkjet ink comprising the following components: 45 parts of hyperbranched silicone resin N4, 33 parts of acrylic acid diluent monomer, 3 parts of photoinitiator, and 2 parts of blue pigment were used to prepare a UV inkjet ink with a viscosity of 97 cPs @ 25 ℃. The inkjet ink was printed on an aluminum substrate using an inkjet printer, and the printed film thickness was about 110 μm. After UV curing, a blue film was obtained. The film was immersed in lithium hexafluorophosphate electrolyte at 85 ℃ and could withstand 4 h without any abnormalities.

[0053] Comparative Example 1 Comparative Example 1 provides an electrolyte-resistant UV inkjet ink suitable for the lithium battery industry, comprising the following components: The UV inkjet ink, prepared with 33 parts acrylic acid diluent monomer, 3 parts photoinitiator, and 2 parts blue pigment, has a viscosity of 16 cPs at 25 ℃. The inkjet ink was printed on an aluminum substrate using an inkjet printer, producing a film thickness of approximately 110 μm. After UV curing, a blue film was obtained. The film was then immersed in lithium hexafluorophosphate electrolyte at 85 ℃, where it rapidly swelled and detached.

[0054] Comparative Example 2 Comparative Example 2 provides an electrolyte-resistant UV inkjet ink suitable for the lithium battery industry, comprising the following components: The UV inkjet ink prepared by Wuhan Maikairui using 45 parts of hyperbranched polyester acrylate, 33 parts of acrylic acid diluent monomer, 3 parts of photoinitiator, and 2 parts of blue pigment had a viscosity of 76 cPs @ 25 ℃. Samples were printed on an aluminum substrate, and the printed film thickness was about 110 μm. After UV curing, a blue film was obtained. The film was then immersed in lithium hexafluorophosphate electrolyte at 85 ℃ and swelled and detached after 0.4 h.

[0055] Comparative Example 3 Comparative Example 3 provides an electrolyte-resistant UV inkjet ink suitable for the lithium battery industry, comprising the following components: The UV inkjet ink prepared by Wuhan Maidehao using 45 parts of hyperbranched alicyclic epoxy resin, 33 parts of acrylic acid diluent monomer, 3 parts of photoinitiator, and 2 parts of blue pigment had a viscosity of 334 cPs @ 25 ℃, which was not suitable for inkjet printing. A sample was prepared by scraping the ink onto an aluminum substrate, resulting in a film thickness of approximately 110 μm. After UV curing, a blue film was obtained. The film was then immersed in lithium hexafluorophosphate electrolyte at 85 ℃, and swelled and detached after 0.5 h.

[0056] Comparative Example 4 Comparative Example 4 provides an electrolyte-resistant UV inkjet ink suitable for the lithium battery industry, comprising the following components: Guangdong Wengjiang Chemical prepared a UV inkjet ink with a viscosity of 53 cPs @ 25 ℃ by using 45 parts of hyperbranched epoxy resin PB40522, 33 parts of acrylic acid diluent monomer, 3 parts of photoinitiator, and 2 parts of blue pigment. The ink was printed on an aluminum substrate, and the printed film thickness was about 110 μm. After UV curing, a blue film was obtained. The film was then immersed in lithium hexafluorophosphate electrolyte at 85 ℃ and swelled and detached after 0.2 h.

[0057] After UV curing, the blue film formed by the hyperbranched silicone resin contained in the embodiments of the present invention exhibited significantly better electrolyte immersion resistance than Comparative Example 1 (without any resin) and Comparative Examples 2 to 4 (with commercially available hyperbranched resin). This result empirically demonstrates that the special structure of the hyperbranched silicone resin containing "umbrella-like" alkyl chains involved in the present invention can substantially enhance the cured coating's resistance to electrolyte erosion while ensuring the low viscosity characteristics of the inkjet ink. This characteristic expands the application potential of such materials in new energy technologies (including but not limited to lithium battery packaging and electrode protection), possessing clear practical value and promising prospects for promotion.

[0058] Compared with the prior art, the present invention has the following beneficial effects: (1) Excellent resistance to electrolyte: The photocurable hyperbranched silicone resin designed by solvent-free synthesis introduces "umbrella-shaped" alkyl chains into the molecular structure, which can effectively cover and seal the pores formed during the polymer film formation process after photocuring, significantly improving the coating's resistance to electrolyte immersion and avoiding performance degradation caused by electrolyte penetration.

[0059] (2) High processing adaptability and stability: This hyperbranched silicone resin has a low viscosity, which makes it easy to add in a high proportion in ink systems, enhancing the adjustability and applicability of the formulation. At the same time, the siloxane structure in the resin endows the material with good high temperature and high humidity resistance, flame retardancy and certain hydrophobic and oleophobic properties, which helps to improve the durability and safety of the coating in harsh environments.

[0060] (3) Comprehensive performance synergistic improvement: By organically combining the "umbrella-shaped" alkyl chain with hyperbranched organosilicon resin, the electrolyte resistance is further enhanced while maintaining the high mechanical strength and environmental resistance of the photocurable coating. This expands the application potential of the material in the new energy field (such as lithium battery packaging, electrode protection, etc.), and has important practical value and promotion prospects.

[0061] The specific embodiments of the present invention have been described above. It should be understood that the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention fall within the scope of protection and disclosure of the present invention.

Claims

1. A hyperbranched organosilicon resin, characterized in that, The resin has the structure shown in Formula I: ； Wherein, R1 is selected from any one of alkyl and haloalkyl; R2 is selected from any one of H, alkyl, and haloalkyl; R3 and R4 are each independently selected from any one of H, halogen, alkyl, cycloalkyl, and aryl; R5 is selected from any one of H and alkyl. X is a group selected from the following general formulas: 、 ； Among them, L1 and L2 are independently selected from single bonds, alkylene groups, and alkoxyalkylene groups, respectively; Q1 is an olefinic unsaturated group; Q2 is an oxygen-containing heterocyclic group.

2. The hyperbranched organosilicon resin according to claim 1, characterized in that, The alkyl groups in R1, R2, R3, R4, and R5 are each independently selected from C1-C5 alkyl groups; the haloalkyl groups in R1 and R2 are each independently selected from C1-C5 haloalkyl groups; the cycloalkyl groups in R3 and R4 are each independently selected from C3-C6 cycloalkyl groups; and the aryl groups in R3 and R4 are each independently selected from substituted or unsubstituted C6-C40 phenyl groups.

3. The hyperbranched organosilicon resin according to claim 1, characterized in that, When X is In this case, L1 is selected from hydrogen-bonded, C1-C5 alkylene groups; When X is In this case, L2 is selected from C2-C10 alkylene groups and C2-C10 alkoxyalkylene groups.

4. The hyperbranched organosilicon resin according to claim 1, characterized in that, X is selected from the following groups: 。 5. The hyperbranched organosilicon resin according to claim 1, characterized in that, The hyperbranched silicone resin is selected from the following compounds: 、 、 。 6. A method for preparing a hyperbranched organosilicon resin, characterized in that, Includes the following steps: The hyperbranched organosilicon resin is obtained by polycondensation reaction of diol and silane coupling agent under heating conditions. The hyperbranched silicone resin has the structure shown in Formula I: ； Wherein, R1 is selected from any one of alkyl and haloalkyl; R2 is selected from any one of H, alkyl, and haloalkyl; R3 and R4 are each independently selected from any one of H, halogen, alkyl, cycloalkyl, and aryl; R5 is selected from any one of H and alkyl. X is a group selected from the following general formulas: 、 ； Among them, L1 and L2 are independently selected from single bonds, alkylene groups, and alkoxyalkylene groups, respectively; Q1 is an olefinic unsaturated group; Q2 is an oxygen-containing heterocyclic group.

7. The preparation method according to claim 6, characterized in that, The diol includes one of 2,4-pentanediol, 2-methyl-2,4-pentanediol, 2,4-dimethyl-2,4-pentanediol, (2S,4S)-2,4-pentanediol, (R,R)-(-)-2,4-pentanediol, (R)-(-)-2-methyl-2,4-pentanediol, and 1,1,1-trifluoro-2-trifluoromethyl-2,4-pentanediol; The silane coupling agent includes one of KH560 and KH570.

8. The preparation method according to claim 6, characterized in that, The molar ratio of the silane coupling agent to the diol is 1-1.

36.

9. An inkjet ink, characterized in that, include: The hyperbranched organosilicon resin as described in any one of claims 1-5, or the hyperbranched organosilicon resin prepared by the preparation method as described in any one of claims 6-8.

10. A lithium battery, characterized in that, include: The thin film formed by the inkjet ink as described in claim 9.

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