Polymer solid electrolyte, method for preparing the same, and battery

Abstract

The application provides a polymer solid electrolyte, a preparation method thereof and a battery, and relates to the technical field of batteries.The polymer solid electrolyte comprises the following steps: (1) adding a solvent into an oxidized graphene aqueous solution, and performing ultrasonic treatment on the oxidized graphene aqueous solution after the solvent is added; (2) adding a polymer matrix into the solution obtained in the step (1) under stirring, and performing heating and stirring; (3) dissolving an inorganic salt in a solvent, and performing ultrasonic treatment; (4) adding the solution obtained in the step (3) into the solution obtained in the step (2), and performing heating and stirring; and (5) placing the solution obtained in the step (4) in a static mold, and performing air blowing drying after static placement is completed, so that the polymer solid electrolyte is obtained. The preparation process of the solid electrolyte can be reduced, water molecules in the electrolyte membrane are fixed by the interaction between the oxidized graphene and the water molecules, the side reaction between the electrolyte membrane and electrode materials is avoided, and the cycle performance of the battery is improved.

Description

Technical Field

[0001] This application relates to the field of polymer solid electrolytes and lithium-ion battery technology, and more specifically, to a polymer solid electrolyte, its preparation method, and a battery. Background Technology

[0002] Lithium-ion batteries, as highly efficient energy storage and conversion devices, have attracted widespread attention due to their high energy density, good cycle performance, and high reliability. However, currently commercially available lithium batteries typically use organic liquid electrolytes containing lithium salts. In practical applications, organic electrolytes have inherent drawbacks such as poor chemical stability, easy leakage, flammability, and explosiveness. Therefore, organic electrolytes pose significant safety hazards. The use of solid electrolytes ensures the safety of lithium-ion batteries while offering advantages such as high energy density, wide operating temperature range, good cycle performance, long service life, and simple battery structure design.

[0003] Solid electrolytes mainly include inorganic solid electrolytes and organic polymer solid electrolytes. Inorganic solid electrolytes typically possess good mechanical strength and high room-temperature ionic conductivity. However, they are brittle, have poor toughness, and high interfacial impedance. Compared to inorganic solid electrolytes, polymer solid electrolytes exhibit good interfacial contact and compatibility with electrodes, are easily deformable, resistant to vibration, impact, and mechanical deformation, are non-flammable, easy to design and process, and have low cost, making them more suitable for large-scale production and offering better prospects for the development of safe lithium batteries. Among many polymer systems, poly(ethylene oxide) (PEO) is considered the most ideal polymer matrix. Therefore, how to obtain PEO-based polymer solid electrolytes has become a challenging problem of concern to those skilled in the art. Summary of the Invention

[0004] One of the objectives of this application is to provide a method for preparing a polymer solid electrolyte to solve the above-mentioned technical problems.

[0005] The second objective of this application is to provide a polymer solid electrolyte prepared by the above-described method for preparing polymer solid electrolytes.

[0006] The third objective of this application is to provide a battery in which the electrolyte membrane is a polymer solid electrolyte prepared by the above-described method for preparing polymer solid electrolyte.

[0007] This application can be implemented as follows:

[0008] In a first aspect, embodiments of this application provide a method for preparing a polymer solid electrolyte, comprising the following steps: (1) adding a solvent to an aqueous solution of graphene oxide and ultrasonically treating the aqueous solution of graphene oxide after adding the solvent; (2) adding a polymer matrix to the solution obtained in step (1) under stirring conditions and stirring the solution after adding the polymer matrix under heating conditions; (3) dissolving an inorganic salt in a solvent and ultrasonically treating the inorganic salt solution after adding the solvent; (4) adding the solution obtained in step (3) to the solution obtained in step (2) and stirring under heating conditions; (5) placing the solution obtained in step (4) in a settling mold, and after settling, placing the settling mold in a forced-air drying oven for forced-air drying to obtain a polymer solid electrolyte;

[0009] The solvent is deionized water or a mixture of deionized water and an organic solvent.

[0010] In an optional embodiment, the polymer matrix is ​​any one or more of polyethylene oxide and polyacrylonitrile, polyvinylidene fluoride, and polymethyl ethylene carbonate.

[0011] In an optional embodiment, the polymer matrix is ​​characterized by being polyethylene oxide, the heating method in step (2) is water bath heating at a temperature of 50-70°C, and the stirring time under heating conditions is 4 hours.

[0012] In an optional embodiment, the graphene oxide has a mass percentage of 1%-20% relative to the polymer matrix.

[0013] In an optional embodiment, the solid-liquid ratio of the polymer matrix added in step (2) is 1%-10%.

[0014] In an optional embodiment, the inorganic salt is a lithium salt or a sodium salt, wherein the lithium salt is any one or more of LiTFSI, LiClO4, LiAsF4, LiPF6, LiBF4, and LiFSI, and the sodium salt is any one or more of NaTFSI, NaClO4, NaPF6, and NaFSI.

[0015] In an optional embodiment, the inorganic salt is LiTFSI, the heating method in step (4) is water bath heating, the temperature is 50-70℃, and the stirring time under heating conditions is 20h.

[0016] In an optional embodiment, the organic solvent is any one or more of acetonitrile, anisole, chloroform, dichloroethane, and N,N-dimethylformamide, and the mixing ratio of the deionized water bath organic solvent in the mixed solution is 1:1 to 9:1.

[0017] Secondly, embodiments of this application provide a polymer solid electrolyte, which is an electrolyte obtained by the above-described preparation method of polymer solid electrolyte.

[0018] Thirdly, embodiments of this application provide a battery comprising the aforementioned polymer solid electrolyte.

[0019] Compared with the prior art, the preparation method of a polymer solid electrolyte provided in this application includes the following steps: (1) adding a solvent to an aqueous solution of graphene oxide and ultrasonically treating the aqueous solution of graphene oxide after adding the solvent; (2) adding a polymer matrix to the solution obtained in step (1) under stirring and stirring the solution after adding the polymer matrix under heating; (3) dissolving an inorganic salt in a solvent and ultrasonically treating the inorganic salt solution after adding the solvent; (4) adding the solution obtained in step (3) to the solution obtained in step (2) and stirring under heating; (5) placing the solution obtained in step (4) in a settling mold, and after settling, placing the settling mold in a forced-air drying oven for forced-air drying to obtain a polymer solid electrolyte. This method can reduce the hazards in the solid electrolyte manufacturing process, use the interaction between graphene oxide and water molecules to fix the residual water in the electrolyte membrane, avoid side reactions between the electrolyte membrane and the electrode material, and improve the battery cycle performance.

[0020] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 Charge-discharge curves of lithium iron phosphate batteries assembled using pure PEO electrolyte membranes.

[0023] Figure 2 The charge-discharge curves of the lithium iron phosphate battery assembled using the polymer solid electrolyte membrane obtained in Example 1 are shown.

[0024] Figure 3 The impedance diagrams of the polymer solid electrolyte membrane obtained in Example 1 at different temperatures are shown. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0026] The following provides a detailed description of the polymer solid electrolyte, its preparation method, and the battery provided in this application.

[0027] In the preparation of PEO-based polymer solid electrolytes, existing technologies often use organic solvents such as acetonitrile and N,N-dimethylformamide (DMF). These solvents have drawbacks such as flammability, explosiveness, volatility, toxicity, long-term inhalation harming the human body, and high production costs. This application uses water to replace organic solvents, avoiding these drawbacks, achieving a green and safe process, and reducing production costs. However, PEO electrolyte membranes prepared using water as a solvent cannot completely dry out the water. Residual water in the electrolyte membrane can react with the battery's positive and lithium metal negative electrodes, resulting in extremely poor battery cycle performance. To solve this problem, this application adds a substance that can interact with water to fix the residual water. This application chooses to add graphene oxide (GO) to achieve this purpose. GO has a large number of oxygen-containing functional groups on its surface, which can form hydrogen bonds with water molecules, thereby binding the water and hindering the occurrence of side reactions. Simultaneously, it can also reduce the crystallinity of the PEO solid electrolyte, increase ionic conductivity, enhance mechanical properties, and improve its inherent defects. For details, please refer to the following text.

[0028] This application proposes a method for preparing a polymer solid electrolyte, comprising the following steps:

[0029] (1) Add a solvent to the aqueous solution of graphene oxide and then subject the aqueous solution of graphene oxide after adding the solvent to ultrasonic treatment.

[0030] (2) Under stirring conditions, add polymer matrix to the solution obtained in step (1), and stir the solution after adding polymer matrix under heating conditions.

[0031] (3) Dissolve the inorganic salt in a solvent and then sonicate the inorganic salt solution after adding the solvent.

[0032] (4) Add the solution obtained in step (3) to the solution obtained in step (2) and stir under heating conditions;

[0033] (5) Place the solution obtained in step (4) into a settling mold. After settling, place the settling mold into a forced-air drying oven to dry it, so as to obtain a polymer solid electrolyte.

[0034] The solvent is deionized water or a mixture of deionized water and organic solvent, and the settling mold can be a polytetrafluoroethylene mold or a glass mold.

[0035] The organic solvent is any one or more of acetonitrile, anisole, chloroform, dichloroethane, and N,N-dimethylformamide. It is important to emphasize that using deionized water or a mixture of deionized water and an organic solvent as the solvent can reduce the percentage of organic solvent or eliminate its use altogether. This can improve or overcome the disadvantages of organic solvents, such as flammability, explosiveness, volatility, toxicity, long-term inhalation harm to the human body, and high production costs.

[0036] It should be noted that in step (1), the solvent is first added to the aqueous solution of graphene oxide to mix the aqueous solution of graphene oxide and the solvent evenly. This is to reduce or avoid the problem of agglomeration of the PEO polymer in subsequent steps. If the polymer matrix (e.g., polyethylene oxide) in step (2) is dissolved in the solvent first, and then the graphene oxide solution in step (1) is added, agglomeration may occur.

[0037] It should be noted that the ultrasonic treatment in step (1) refers to placing the graphene oxide aqueous solution with added solvent into an ultrasonic cleaner for ultrasonic treatment for up to 30 minutes. Ultrasonic treatment is performed to evenly disperse the partially aggregated graphene oxide sheets, thereby ensuring uniform mixing with the deionized water solvent.

[0038] It should be noted that the polymer matrix added in step (2) can be polyethylene oxide powder.

[0039] It should be noted that the ultrasonic treatment of the inorganic salt solution after adding solvent in step (3) refers to placing the inorganic salt solution after adding solvent in an ultrasonic cleaner for ultrasonic treatment for up to 10 minutes. The purpose of ultrasonic treatment is to allow the inorganic salt solution to mix better with the solvent.

[0040] It should be noted that in step (4), the solution obtained in step (3) is added to the solution obtained in step (2) by adding it drop by drop or in stages, so as to make the mixed solution more evenly dispersed and reduce the stirring time.

[0041] It should be noted that the settling time in step (5) can be 20 minutes. The purpose of settling is to allow the viscous solution to flow during the settling time, so as to make the surface more uniform. The polymer solid electrolyte obtained in step (5) can be a polymer solid electrolyte membrane, such as a GO-PEO polymer solid electrolyte membrane.

[0042] In a preferred embodiment, when the solvent is a mixture of deionized water and an organic solvent, the polymer matrix is ​​any one or a mixture of polyethylene oxide (PEO), polyacrylonitrile (PAN), polyvinylidene fluoride (PVDF), and polymethyl ethylene carbonate (PPC).

[0043] Optionally, the polymer matrix is ​​polyethylene oxide (PEO) or a mixture of PEO and other polymer matrices, and the other polymer matrices can be any one or more of polyacrylonitrile (PAN), polyvinylidene fluoride (PVDF), and polymethyl ethylene carbonate (PPC).

[0044] In a preferred real-time method, when the solvent is deionized water or a mixture of deionized water and organic solvent, the polymer matrix is ​​polyethylene oxide, the heating method in step (2) is water bath heating, the temperature is 50-70℃, and the stirring time under heating conditions is 4h.

[0045] It should be noted that the dissolution rate and efficiency of polyethylene oxide are both excellent at 60℃. This is because polyethylene oxide dissolves more efficiently at higher temperatures, but its melting point is around 65℃. To prevent polyethylene oxide from melting, the heating temperature can be set at 60℃.

[0046] In a preferred real-time configuration, the mass percentage of graphene oxide relative to the polymer matrix (e.g., polyethylene oxide) is 1%–20%.

[0047] In a preferred real-time manner, the solid-liquid ratio of the polymer matrix added in step (2) is 1%-10%. The solid-liquid ratio refers to the ratio of the mass of the polymer matrix to the mass of the solvent.

[0048] In a preferred real-time configuration, the inorganic salt is a lithium salt or a sodium salt, wherein the lithium salt is any one or more of LiTFSI, LiClO4, LiAsF4, LiPF6, LiBF4, and LiFSI, and the sodium salt is any one or more of NaTFSI, NaClO4, NaPF6, and NaFSI.

[0049] In the preferred real-time method, the inorganic salt is LiTFSI, the heating method in step (4) is water bath heating, the temperature is 60℃, and the stirring time under heating conditions is 20h.

[0050] In a preferred real-time method, the organic solvent is any one or more of acetonitrile, anisole, chloroform, dichloroethane, and N,N-dimethylformamide, and the mixing ratio of the organic solvent in the deionized water bath in the mixed solution is 1:1 to 9:1.

[0051] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0052] Example 1

[0053] Take 5 mL of a 2.0 mg / mL graphene oxide aqueous solution, add 35 mL of deionized water, and treat in an ultrasonic cleaner for 30 min to obtain a yellowish-brown transparent solution. Under stirring, slowly add 1 g of polyethylene oxide powder with an average molecular weight of approximately 600,000 to the above solution, then heat in a 60°C water bath and stir for 4 h until the polyethylene oxide is completely dissolved, obtaining a brown viscous solution. Take 0.4078 g of LiTFSI, dissolve in 2 mL of deionized water, treat in an ultrasonic cleaner for 10 min, and add dropwise to the completely dissolved GO-PEO aqueous solution above. Continue heating and stirring in a 60°C water bath for 20 h to obtain a black, semi-transparent viscous solution. Transfer the solution to a polytetrafluoroethylene mold, let it stand, and then dry it in a forced-air oven at 45°C to obtain the GO-PEO polymer solid electrolyte membrane.

[0054] During the process, the numerous oxygen-containing functional groups on the GO surface form hydrogen bonds with water molecules, which break during heating to form water. This water may be evaporated, and the remaining graphene oxide will form new hydrogen bonds with the remaining water, thus fixing the water.

[0055] Please refer to Figure 1 , Figure 2 as well as Figure 3 , Figure 1 The figure shows the charge-discharge curves of a lithium iron phosphate battery assembled using a pure PEO electrolyte membrane. It can be seen from the figure that the battery assembled using a pure PEO electrolyte membrane has extremely poor cycle performance. During the cycle, the battery is accompanied by polarization. After 14 cycles, the polarization phenomenon is severe and it cannot work normally afterward. The reason for this phenomenon is that the residual water in the electrolyte membrane reacts with the electrode material. Figure 2 The figure shows the charge-discharge curves of the lithium iron phosphate battery assembled using the polymer solid electrolyte membrane obtained in Example 1. It can be seen from the figure that the polarization phenomenon of the battery assembled with the PEO-GO electrolyte membrane is weakened during the cycling process. After 46 stable cycles, a small amount of polarization is generated. This is because the graphene oxide in the electrolyte membrane fixes the residual water and prevents it from reacting with the electrode material. Figure 3 The impedance diagrams of the polymer solid electrolyte membrane obtained in Example 1 at different temperatures are shown.

[0056] Example 2

[0057] Take 10 mL of a 2.0 mg / mL graphene oxide aqueous solution, add 35 mL of deionized water, and treat in an ultrasonic cleaner for 30 min to obtain a yellowish-brown transparent solution. Under stirring, slowly add 1 g of polyethylene oxide powder with an average molecular weight of approximately 600,000 to the above solution, then heat in a 60°C water bath and stir for 4 h until the polyethylene oxide is completely dissolved, obtaining a brown viscous solution. Take 0.4078 g of LiTFSI, dissolve in 2 mL of deionized water, treat in an ultrasonic cleaner for 10 min, and add dropwise to the completely dissolved GO-PEO aqueous solution. Continue heating and stirring in a 60°C water bath for 20 h to obtain a black, semi-transparent, viscous solution. Transfer the solution to a polytetrafluoroethylene mold, let it stand, and then dry it in a forced-air oven at 45°C to obtain the GO-PEO polymer solid electrolyte membrane.

[0058] Example 3

[0059] Take 25 mL of a 2.0 mg / mL graphene oxide aqueous solution, add 35 mL of deionized water, and treat in an ultrasonic cleaner for 30 min to obtain a yellowish-brown transparent solution. Under stirring, slowly add 1 g of polyethylene oxide powder with an average molecular weight of approximately 600,000 to the above solution, then heat in a 60°C water bath and stir for 4 h until the polyethylene oxide is completely dissolved, obtaining a brown viscous solution. Take 0.4078 g of LiTFSI, dissolve in 2 mL of deionized water, treat in an ultrasonic cleaner for 10 min, and add dropwise to the completely dissolved GO-PEO aqueous solution. Continue heating and stirring in a 60°C water bath for 20 h to obtain a black, semi-transparent viscous solution. Transfer the solution to a polytetrafluoroethylene mold, let it stand, and then dry it in a forced-air oven at 45°C to obtain the GO-PEO polymer solid electrolyte membrane.

[0060] Example 4

[0061] Take 5 mL of a 2.0 mg / mL graphene oxide aqueous solution, add 35 mL of deionized water, and treat in an ultrasonic cleaner for 30 min to obtain a yellowish-brown transparent solution. Under stirring, slowly add 1 g of polyethylene oxide powder with an average molecular weight of approximately 600,000 to the above solution, then heat in a 60°C water bath and stir for 4 h until the polyethylene oxide is completely dissolved, obtaining a brown viscous solution. Take 0.5019 g of LiTFSI, dissolve in 2 mL of deionized water, treat in an ultrasonic cleaner for 10 min, and add dropwise to the completely dissolved GO-PEO aqueous solution. Continue heating and stirring in a 60°C water bath for 20 h to obtain a black, semi-transparent viscous solution. Transfer the solution to a polytetrafluoroethylene mold, let it stand, and then dry it in a forced-air oven at 45°C to obtain the GO-PEO polymer solid electrolyte membrane.

[0062] The method for preparing polymer solid electrolytes provided in this application uses water as a solvent in the preparation of PEO solid electrolytes. This method is safe, non-toxic, harmless, green, pollution-free, and low-cost, avoiding the high costs and harm to human health and the environment associated with using organic solvents such as acetonitrile and N,N-dimethylformamide (DMF). Furthermore, the lithium salts used in the preparation process are highly hygroscopic, requiring strict environmental conditions; using water as a solvent eliminates concerns about the water absorption of lithium salts.

[0063] By utilizing the interaction between graphene oxide (GO) and water molecules, residual water in the electrolyte membrane is immobilized, preventing side reactions between the electrolyte membrane and electrode materials and improving battery cycle performance. Simultaneously, it can also enhance the electrochemical performance, thermal stability, and mechanical strength of PEO-based electrolytes. Graphene oxide can inhibit the formation of PEO crystal nuclei, increase amorphous regions, and improve the mobility of PEO segments, thereby increasing the ionic conductivity of the electrolyte membrane.

[0064] Correspondingly, this application also provides an electrolyte obtained by the above-described method for preparing polymer solid electrolytes, namely, a polymer solid electrolyte. This polymer solid electrolyte uses PEO as the polymer matrix, LiTFSI as the lithium salt, and graphene oxide as an additive to form a uniformly composed electrolyte membrane.

[0065] In addition, this application also provides a battery in which the polymer electrolyte membrane for preparing the battery is an electrolyte membrane obtained by the above-described method for preparing polymer solid electrolyte.

[0066] Optionally, the prepared polymer electrolyte membrane is used as the electrolyte, and lithium iron phosphate, acetylene black and polyvinylidene fluoride are mixed in a ratio of 8:1:1 to form a slurry. The slurry is uniformly coated on aluminum foil as the positive electrode of the battery, and lithium sheet is used as the negative electrode of the battery. After assembling into a button cell in a glove box, a constant current charge and discharge test is performed with a voltage range of 2.5-3.9V.

[0067] It should be noted that the slurry only needs to be applied to one side of the aluminum foil, and the coated side should be in contact with the electrolyte membrane.

[0068] It should be noted that the safe and environmentally friendly polymer solid electrolyte provided in this application is used in lithium-ion batteries and sodium-ion batteries.

[0069] In summary, the preparation method of the polymer solid electrolyte provided in this application includes the following steps: (1) adding a solvent to an aqueous solution of graphene oxide and ultrasonically treating the aqueous solution of graphene oxide after adding the solvent; (2) adding a polymer matrix to the solution obtained in step (1) under stirring and stirring the solution after adding the polymer matrix under heating; (3) dissolving an inorganic salt in a solvent and ultrasonically treating the inorganic salt solution after adding the solvent; (4) adding the solution obtained in step (3) to the solution obtained in step (2) and stirring under heating; (5) placing the solution obtained in step (4) in a settling mold, and after settling, placing the settling mold in a forced-air drying oven for forced-air drying to obtain the polymer solid electrolyte. This method can reduce the hazards in the solid electrolyte manufacturing process, use the interaction between graphene oxide and water molecules to fix the residual water in the electrolyte membrane, avoid side reactions between the electrolyte membrane and the electrode material, and improve the battery cycle performance.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for preparing a polymer solid electrolyte, characterized in that, The steps include: (1) adding deionized water to the graphene oxide aqueous solution and ultrasonically treating the graphene oxide aqueous solution after adding deionized water; (2) adding polymer matrix to the solution obtained in step (1) under stirring and stirring the solution after adding polymer matrix under heating; (3) dissolving inorganic salt in deionized water and ultrasonically treating the inorganic salt solution after adding deionized water; (4) adding the solution obtained in step (3) to the solution obtained in step (2) and stirring under heating; (5) placing the solution obtained in step (4) in a settling mold, and after settling, placing the settling mold in a forced-air drying oven to obtain a polymer solid electrolyte. In step (4), the solution obtained in step (3) is added to the solution obtained in step (2) in a step-by-step manner.

2. The method for preparing the polymer solid electrolyte as described in claim 1, characterized in that, The polymer matrix is ​​any one or more of polyethylene oxide and polyacrylonitrile, polyvinylidene fluoride and polymethyl ethylene carbonate.

3. The method for preparing the polymer solid electrolyte as described in claim 1, characterized in that, The polymer matrix is ​​polyethylene oxide. The heating method in step (2) is water bath heating, the temperature is 50-70℃, and the stirring time under heating conditions is 4h.

4. The method for preparing the polymer solid electrolyte as described in claim 1, characterized in that, The graphene oxide content relative to the polymer matrix is ​​1%-20% by mass.

5. The method for preparing the polymer solid electrolyte as described in claim 1, characterized in that, In step (2), the solid-liquid ratio of the polymer matrix added is 1%-10%.

6. The method for preparing the polymer solid electrolyte as described in claim 1, characterized in that, The inorganic salt is a lithium salt or a sodium salt, wherein the lithium salt is any one or more of LiTFSI, LiClO4, LiPF6, LiBF4, and LiFSI, and the sodium salt is any one or more of NaTFSI, NaClO4, NaPF6, and NaFSI.

7. The method for preparing the polymer solid electrolyte as described in claim 1, characterized in that, The inorganic salt is LiTFSI. The heating method in step (4) is water bath heating, the temperature is 50-70℃, and the stirring time under heating conditions is 20h.

8. A polymer solid electrolyte, characterized in that, The electrolyte obtained by the preparation method of the polymer solid electrolyte according to any one of claims 1-7.

9. A battery, characterized in that, The battery comprises the polymer solid electrolyte as described in claim 8.

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