Preparation method and application of PAM-F127 synergistic enhanced hydrogel electrolyte

Abstract

The invention discloses a preparation method and application of a PAM-F127 synergistically enhanced hydrogel electrolyte, and the electrolyte is prepared by taking a hydrogel network (a polymeric monomer, an initiator and a cross-linking agent), F127 and an electrolyte zinc salt solution as raw materials through thermal initiation polymerization. An interpenetrating network is constructed through PAM and F127 to form a rigid-flexible cooperative mechanism, a continuous hydrophilic channel is constructed through a PEO chain segment of F127, and a zinc ion solvation sheath is reconstructed to realize leap-type improvement of ionic conductivity; the gel is endowed with high tensile strength and toughness superior to those of a conventional material through a toughening mechanism that a PAM rigid framework and an F127 flexible chain are entangled to dissipate energy; and a dynamic self-adaptive interface layer is formed through in-situ induction so as to synergistically inhibit dendritic crystal growth and side reaction, and finally, the long cycle life of the battery is realized. The hydrogel electrolyte prepared by the invention has the characteristics of high ionic conductivity, excellent mechanical property, long cycle life and the like.

Description

Technical Field

[0001] This invention relates to a method for preparing and applying an electrolyte for energy storage devices, and more particularly to a method for preparing and applying a PAM-F127 synergistic-enhanced hydrogel electrolyte. Background Technology

[0002] Zinc-ion batteries, with their advantages of low cost and intrinsic safety, have become a highly promising energy storage solution for portable and wearable electronic devices. Hydrogel electrolytes, due to their combination of ion transport capabilities and flexibility, have become one of the core directions in the research and development of flexible zinc-ion batteries. However, traditional hydrogel-based electrolytes often face problems such as insufficient ionic conductivity and poor stability of the zinc anode interface: on the one hand, the swelling characteristics of the hydrogel molecular network easily lead to uneven contact with the electrode, causing an increase in local ion transport impedance; on the other hand, side reactions such as hydrogen evolution and passivation caused by high water content accelerate the corrosion of the zinc anode, severely limiting the battery's cycle life. Therefore, developing hydrogel electrolytes that combine high ionic conductivity with long-term stability of the zinc anode is a key breakthrough for promoting the practical application of flexible zinc-ion batteries.

[0003] Polyacrylamide (PAM), as a classic hydrogel matrix, possesses good hydrophilicity and chemical stability. However, due to the limitations of its dense covalent network, its mechanical strength is limited and its ion transport efficiency is relatively low. Under bending or external stress in flexible devices, it is prone to plastic deformation or even cracking, leading to debonding at the electrode / electrolyte interface. Furthermore, its network provides weak directional guidance for zinc ion conduction, making it difficult to meet the rate requirements of high power density scenarios, and it cannot effectively suppress dendrite growth and side reactions. Pluronic F127, as a thermoresponsive block copolymer, can self-assemble into micelles and adjust its structural order with temperature. However, when used alone or in simple blends, it lacks stable covalent network support, is prone to structural dissociation, and suffers from discontinuous ion transport paths, resulting in limited improvement in conductivity. While its hydrophilic segments can adsorb water, they cannot confine water activity. High water content can actually exacerbate hydrogen evolution and zinc anode corrosion, leading to insufficient stability and failing to meet the long-term reliability requirements of flexible zinc batteries.

[0004] Therefore, there is an urgent need to develop a hydrogel electrolyte and zinc-ion battery that combines high ionic conductivity, long-term stability of the zinc anode, and tensile flexibility. Summary of the Invention

[0005] Purpose of the invention: The purpose of this invention is to provide a method for preparing a PAM-F127 synergistically reinforced hydrogel electrolyte that combines high ionic conductivity, long-term stability of the zinc anode, and tensile flexibility.

[0006] A second objective of this invention is to provide the application of the PAM-F127 synergistically enhanced hydrogel electrolyte obtained by the above method in batteries.

[0007] Technical solution: The preparation method of the PAM-F127 synergistic reinforced hydrogel electrolyte of the present invention includes the following steps:

[0008] (1) After dissolving the weakly coordinated electrolyte zinc salt, it is stirred and mixed with triblock copolymer F127, polymer monomer, crosslinking agent and initiator to obtain electrolyte precursor solution;

[0009] (2) The electrolyte precursor solution was sealed and allowed to stand for thermally initiated polymerization to obtain PAM-F127 synergistically enhanced hydrogel electrolyte.

[0010] In step (1), the weakly coordinated electrolyte zinc salt is at least one of zinc trifluoromethanesulfonate, zinc bis(fluoromethanesulfonyl)imide, zinc bis(fluorosulfonyl)imide, zinc perfluorotert-butoxy zinc salt, zinc tetrafluoroborate, or zinc hexafluorophosphate.

[0011] In step (1), the solubility of the zinc salt solution is 0.8-1.2 mol / L.

[0012] In step (1), the mass ratio of zinc salt solution to polymer monomer is 10:3-10:1; the mass ratio of polymer monomer to crosslinking agent is 200:1-500:1; and the mass ratio of polymer monomer to initiator is 100:1-200:1.

[0013] In step (1), the weakly coordinated electrolyte zinc salt is mixed with water and stirred under sealed conditions to dissolve it, thereby obtaining a uniform zinc salt solution.

[0014] In step (2), the polymer monomer is at least one of acrylamide, isopropylacrylamide, dimethylacrylamide, or acrylic acid.

[0015] In step (2), the crosslinking agent is at least one of N,N'-methylenebisacrylamide, N,N,N',N'-tetramethylethylenediamine or ethylene glycol dimethacrylate; and the initiator is at least one of peroxyacyl, hydrogen peroxide, sodium persulfate, perthioamide, ethylenediamine, five-membered cyclic amine, sodium bisulfite or ammonium bisulfite.

[0016] In step (2), the temperature of the thermally initiated polymerization reaction is 60-80℃, and the time of the thermally initiated polymerization reaction is 2-4 h.

[0017] Application of the PAM-F127 synergistic-enhanced hydrogel electrolyte prepared by the above method in batteries.

[0018] Specifically, its application in flexible zinc-ion batteries; the flexible zinc-ion battery includes a positive electrode, a negative electrode, and a PAM-F127 synergistic-enhanced hydrogel electrolyte layer obtained by the above method located between the positive electrode and the negative electrode, the positive electrode, the negative electrode and the PAM-F127 synergistic-enhanced hydrogel electrolyte layer constituting a sandwich structure flexible zinc-ion battery.

[0019] Furthermore, the method for preparing the flexible zinc-ion battery includes the following steps:

[0020] (1) Preparation of positive electrode sheet; ammonium vanadate is preferably used as the positive electrode material to prepare ammonium vanadate positive electrode sheet;

[0021] (2) PAM-F127 synergistically enhanced hydrogel electrolyte was prepared using the above method;

[0022] (3) Zinc sheet is used as the negative electrode;

[0023] (4) Assemble the positive electrode, gel electrolyte and zinc sheet into a sandwich structure flexible zinc-ion battery.

[0024] Invention Principle: PAM and F127 form an interpenetrating network structure, achieving a triple enhancement effect in zinc-ion batteries through a precise cross-scale synergistic mechanism. In terms of ion conduction, the rigid PAM network acts as a topological support, providing a confined space for the physical entanglement of the flexible F127 segments; while the PEO blocks of F127, with their strong coordination ability with zinc ions, reconstruct the solvation sheath layer of zinc ions, forming continuous hydrophilic high-speed transport channels and significantly reducing the desolvation energy barrier. This synergistic effect effectively improves ionic conductivity. In terms of mechanical properties, this interpenetrating structure achieves synergistic toughening through a combination of rigidity and flexibility: the PAM network imparts high strength and structural stability to the material, while the flexible segments of F127 dissipate external energy through reversible extension and entanglement, effectively passivating crack tips and inhibiting their propagation, thereby endowing the gel with excellent toughness and puncture resistance. Regarding interfacial stability, this network can induce the formation of a dynamic, adaptive organic-inorganic composite interfacial layer in situ. This interface layer not only homogenizes zinc ion flux and guides uniform deposition to suppress dendrites, but also reduces water activity through confinement effects, synergistically suppressing side reactions such as hydrogen evolution and corrosion, significantly improving the cycle life of zinc-ion batteries. In summary, the PAM-F127 interpenetrating network successfully achieves synergistic optimization of ion transport, mechanical properties, and interface engineering.

[0025] Beneficial effects: Compared with the prior art, the present invention achieves the following significant effects: (1) The present invention uses a synergistic enhancement strategy of forming an interpenetrating network with PAM and F127, which combines excellent electrochemical performance, high ionic conductivity and tensile flexibility. (2) The battery system prepared by the present invention exhibits significantly enhanced electrochemical performance. Compared with pure PAM hydrogel electrolyte, the introduction of F127 to form an interpenetrating network structure increases the ionic conductivity from 14.5 mS / cm. -1 Increased to 19.8 mS cm -1 The stable voltage window is extended to 2.5 V. (3) The battery system prepared by the present invention also achieves significant improvement in mechanical properties; the introduction of F127 promotes the formation of a multi-level porous structure inside the PAM matrix and enhances the hydrogen bonding between polymer chains, increasing the tensile strength from 52 KPa to 252 KPa; the elongation at break increases from 150% to 550%, and both strength and toughness are significantly improved. (4) The preparation method of the present invention is simple and practical, and it is not only applicable to traditional battery technology, but also to new flexible batteries and wearable devices. Attached Figure Description

[0026] Figure 1 The morphology of the PAM-F127 synergistic reinforced hydrogel electrolyte obtained in Example 1 and the PAM hydrogel electrolyte obtained in Comparative Example 1 are characterized, where a is the SEM image of the PAM hydrogel electrolyte and b is the SEM image of the PAM-F127 synergistic reinforced hydrogel electrolyte.

[0027] Figure 2 The infrared characterization spectra of the PAM-F127 synergistic reinforced hydrogel electrolyte obtained in Example 1 and the PAM hydrogel electrolyte obtained in Comparative Example 2 are shown.

[0028] Figure 3 Cyclic voltammetry curves of the PAM-F127 synergistic-enhanced hydrogel electrolyte obtained in Example 2 and the PAM hydrogel electrolyte obtained in Comparative Example 1 are shown.

[0029] Figure 4 The AC impedance spectra of the PAM-F127 synergistic reinforced hydrogel electrolyte obtained in Example 2 and the PAM hydrogel electrolyte obtained in Comparative Example 1 are shown.

[0030] Figure 5 Linear sweep voltammetric curves of the PAM-F127 synergistic-enhanced hydrogel electrolyte obtained in Example 2 and the PAM hydrogel electrolyte obtained in Comparative Example 1 are shown.

[0031] Figure 6 The water content of the PAM-F127 synergistic reinforced hydrogel electrolyte obtained in Example 2 and the PAM hydrogel electrolyte obtained in Comparative Example 1 is compared.

[0032] Figure 7 The stress-strain curves of the tensile deformation test of the PAM-F127 synergistic reinforced hydrogel electrolyte obtained in Example 2 and the PAM hydrogel electrolyte obtained in Comparative Example 1 are shown.

[0033] Figure 8 This is a physical illustration of the PAM-F127 synergistic-enhanced hydrogel electrolyte's resistance to puncture, obtained in Example 2.

[0034] Figure 9 This is a physical illustration of the irregularly shaped open zinc-ion battery assembled with PAM-F127 electrolyte obtained in Example 3;

[0035] Figure 10 This is a physical demonstration of the flexible zinc-ion battery assembled with PAM-F127 electrolyte obtained in Example 3 in a specific application scenario. Detailed Implementation

[0036] The present invention will now be described in further detail.

[0037] Example 1

[0038] A 1 mol / L zinc trifluoromethanesulfonate solution was prepared by dissolving zinc trifluoromethanesulfonate in deionized water and magnetically stirred at room temperature until fully dissolved. 0.8 g of F127 was added to 10 mL of this zinc trifluoromethanesulfonate solution and magnetically stirred at an ice bath until fully dissolved. 2 g of acrylamide was added, and the mixture was stirred at room temperature for 30 min, followed by ultrasonic aeration to dissolve air bubbles. Then, 0.004 g of N,N'-methylenebisacrylamide and 0.01 g of ammonium persulfate were added sequentially, and the mixture was magnetically stirred at room temperature until fully dissolved, yielding the precursor solution for preparing the hydrogel electrode. 10 mL of this precursor solution was transferred to an ultraflat culture dish and placed in a 60℃ drying oven for static thermal initiation polymerization for 2 h. After cooling to room temperature, the PAM-F127 synergistic-enhanced hydrogel electrolyte was obtained. The morphology of the PAM-F127 synergistic-enhanced hydrogel electrolyte is shown below. Figure 1 Infrared characterization spectra of the components, such as Figure 2 .

[0039] Comparative Example 1

[0040] Based on Example 1, the difference from Example 1 is that F127 was not added.

[0041] Morphological characterization of PAM hydrogel electrolytes as follows: Figure 1 (a) Infrared characterization spectra of component (a) are as follows: Figure 2 ; Cyclic voltammetry curve as shown Figure 3 AC impedance spectrum as shown Figure 4 Linear scanning voltammetry curves, such as... Figure 5 Moisture content comparison curves are as follows: Figure 6 The stress-strain curves from the tensile deformation test are as follows: Figure 7 .

[0042] The dual-network structure was verified using SEM and FTIR in Example 1 and Comparative Example 1, and the synergistic enhancement mechanism was analyzed.

[0043] Depend on Figure 1 As can be seen, the introduction of F127 transforms the microstructure from a relatively simple pore structure into a hierarchical porous structure. Macropores provide ion transport channels, while mesopores increase the electrode-electrolyte contact area, effectively reducing ion migration resistance and enhancing ion diffusion rates, thereby improving battery charge-discharge performance and reducing polarization. Simultaneously, the hierarchical porous structure alleviates volume changes during zinc deposition, inhibits dendrite growth, and enhances battery cycle stability, enabling zinc-ion batteries to maintain good electrochemical performance during long-term cycling.

[0044] Depend on Figure 2 The increased COC peak intensity demonstrates the successful introduction of F127, while the red shift of the -OH peak indicates enhanced hydrogen bonding, suggesting that the hydrogen bond network can stabilize Zn. 2+ The solvation structure lowers the desolvation energy barrier, improves ionic conductivity and inhibits water decomposition, and widens the voltage window; at the same time, it forms a dual-network structure in synergy with the PAM covalent network, enhancing mechanical strength and toughness, so that the electrolyte has both high electrochemical performance and good mechanical stability.

[0045] Example 2

[0046] Based on Example 1, the difference from Example 1 is that the amount of F127 added was adjusted to 0.8 g, 1.0 g, and 1.2 g, corresponding to concentrations of 0.08 g / mL, 0.1 g / mL, and 0.12 g / mL, respectively. The gelation effect was compared, and relevant tests on electrochemical and mechanical properties were performed.

[0047] The cyclic voltammetry curve of the PAM-F127 synergistically enhanced hydrogel electrolyte with an F127 addition of 0.1 g / mL is shown in the figure below. Figure 3 AC impedance spectrum as shown Figure 4 Linear scanning voltammetry curves, such as... Figure 5 Moisture content comparison curves are as follows: Figure 6 The stress-strain curves from the tensile deformation test are as follows: Figure 7 The actual image of the electrolyte resistance puncture performance test is shown below. Figure 8 .

[0048] like Figure 3As shown, within the same potential range, PAM-F127 has a higher absolute current density at multiple oxidation / reduction peaks than PAM. Higher peak current means more active sites participate in the reaction, which is beneficial to improving the charge and discharge capacity and rate performance of the battery.

[0049] like Figure 4 As shown, the ionic conductivity of PAM-F127 increased from 14.5 mScm⁻¹ to 19.8 mScm⁻¹, an increase of 36.5%. High ionic conductivity can reduce battery internal resistance, improve power density and rate performance, and enable the battery to maintain low polarization and high coulombic efficiency under high current charge and discharge conditions.

[0050] like Figure 5 As shown, the introduction of F127 broadens the stable voltage window of the PAM-F127 system from 2.4 V to 2.5 V, an increase of 0.1 V, and enhances its oxidation / reduction resistance. The mechanism involves the formation of an interpenetrating network between F127 and PAM, which strengthens hydrogen bonding and constructs a hierarchical porous structure, effectively suppressing water decomposition and side reactions.

[0051] like Figure 6 As shown, the water content of PAM-F127 is significantly increased from 24.8% to 50.6%, retaining more free water while maintaining stability. The interpenetrating network of F127 and PAM effectively regulates water activity through hydrogen bonding and spatial confinement, preventing excessive free water from causing hydrogen evolution or corrosion. The appropriately increased confined aqueous phase can improve ion transport efficiency and electrode / electrolyte interface wettability, while suppressing side reactions. This improves ionic conductivity and interfacial stability while maintaining a wide voltage window and long cycle life, providing an ideal electrolyte environment for high-rate, flexible zinc-ion batteries.

[0052] like Figure 7 As shown, the introduction of F127 promotes the formation of a multi-level porous structure inside the PAM matrix and enhances the hydrogen bonding between polymer chains, increasing the tensile strength from 52 kPa to 252 kPa; the elongation at break increases from 150% to 550%, and both strength and toughness are significantly improved.

[0053] like Figure 8 As shown, the electrolyte exhibits remarkable toughness under puncture by a sharp object, without brittle fracture. Its structure effectively buffers and disperses stress when subjected to force, maintaining its integrity even after puncture, demonstrating excellent puncture resistance. This characteristic allows it to withstand complex working conditions in relevant applications, ensuring system stability and safety.

[0054] Example 3

[0055] Zinc trifluoromethanesulfonate was dissolved in deionized water to prepare a 1 mol / L zinc trifluoromethanesulfonate solution, and the solution was magnetically stirred at room temperature until fully dissolved. 1.0 g of F127 was added to 10 mL of this zinc trifluoromethanesulfonate solution, and the solution was magnetically stirred at an ice bath until fully dissolved. 2 g of acrylamide was added, and the mixture was stirred at room temperature for 30 min, followed by ultrasonic aeration to dissolve air bubbles. Then, 0.004 g of N,N'-methylenebisacrylamide and 0.01 g of ammonium persulfate were added sequentially, and the mixture was magnetically stirred at room temperature until fully dissolved to obtain the precursor solution for preparing the hydrogel electrode. 10 mL of each precursor solution was transferred to an ultraflat culture dish and placed in drying ovens at 30℃, 40℃, 50℃, 60℃, 70℃, and 80℃, respectively, for static thermally initiated polymerization. After cooling to room temperature, the PAM-F127 synergistically enhanced hydrogel electrolyte was obtained. The thermally initiated polymerization temperature and gelation effect in this example are shown in Table 1.

[0056] Among them, "gel time" characterizes the reaction efficiency of the system; "gel effect" characterizes whether the system can promote the construction of basic interpenetrating network by components such as F127 to achieve gelation; "whether there is oil film precipitation on the surface" characterizes the integrity and stability of the interpenetrating network structure. High temperature affects F127, the key component that constitutes the interpenetrating network in the system, causing a small amount of precipitation.

[0057] A comprehensive comparison of gelation time, gelation effect, and surface oil film precipitation at various temperatures revealed the following: While successful gelation was achieved at 30℃, 40℃, and 50℃, the gelation time was excessively long; although gelation times were shorter at 70℃ and 80℃, the performance degradation caused by significant surface precipitation was not negligible. At 60℃, successful gelation and the optimal gel state were observed; the gelation time was 2 hours, significantly reduced compared to 30℃, 40℃, and 50℃, indicating improved reaction efficiency; and the degree of surface precipitation was only slightly higher than the "slight precipitation" at 50℃, remaining within a relatively controllable range. This suggests that F127 precipitation was suppressed to some extent at this temperature, preserving the integrity of the interpenetrating network structure and approaching the ideal state overall. A good balance was achieved across these three key dimensions. Therefore, considering the efficiency of gel formation, the stability of the gel structure, and the impact of surface precipitation on performance, 60℃ yielded the best gelation effect.

[0058] Table 1. Thermally initiated polymerization temperature and gelation effect in Example 3

[0059]

[0060] Application Example 1

[0061] Ammonium vanadate was selected as the positive electrode electrochemical active filler; zinc sheet was selected as the negative electrode; and PAM-F127 synergistic enhanced hydrogel electrolyte with an optimal addition amount of 0.1 g / mL of F127 was selected as the electrolyte in Example 2. The preparation process was the same as in Example 2.

[0062] First, 0.07 g ammonium vanadate, 0.02 g Ketjen black, 0.01 g polyvinylidene fluoride, and 800 µL N-methylpyrrolidone were added to a ball mill jar and shaken thoroughly for 30 min. The resulting mixture was coated onto a stainless steel mesh and cured at 60 °C for 12 h to obtain the positive electrode (NVO). Then, 10 mL of PAM-F127 electrolyte precursor solution was placed in an ultraflat petri dish and cured at 60 °C for 2 h to form a PAM-F127 synergistic-enhanced hydrogel electrolyte. The negative electrode was a zinc sheet (Zn). Different shapes of positive and negative electrode sheets and electrolytes can be cut according to requirements. A flexible zinc-ion battery with a sandwich structure can be prepared by combining the positive electrode sheet, electrolyte, and negative electrode sheet.

[0063] The assembled irregularly shaped open zinc-ion battery is shown in the following image. Figure 9 As shown, this flexible zinc-ion battery can provide stable power to electronic thermometers and hygrometers in various shapes. A physical demonstration of this flexible zinc-ion battery in a specific application scenario is shown below. Figure 10 As shown, the battery wraps around the wrist and is connected to a light strip. Even when the battery deforms with hand movements, it maintains stable power delivery, and the light strip remains bright. This fully demonstrates its resistance to deformation and stable electrical performance in wearable scenarios, providing strong support for applications in the field of flexible electronics.

Claims

1. A method for preparing a PAM-F127 synergistically enhanced hydrogel electrolyte, characterized in that, The method comprises the following steps: (1) dissolving a weak coordination electrolyte zinc salt, and stirring and mixing the zinc salt with a triblock copolymer F127, a polymer monomer, a crosslinking agent and an initiator to obtain an electrolyte precursor solution; (2) sealing and standing the electrolyte precursor solution to perform a thermal initiation polymerization reaction, and obtaining a PAM-F127 synergistically enhanced hydrogel electrolyte.

2. The preparation method of the PAM-F127 synergistically reinforced hydrogel electrolyte according to claim 1, characterized in that, In step (1), the weak coordination electrolyte zinc salt is at least one of zinc trifluoromethanesulfonate, zinc bis(trifluoromethanesulfonyl)imide, zinc bis(fluorosulfonyl)imide, zinc perfluoro-t-butoxide, zinc tetrafluoroborate or zinc hexafluorophosphate.

3. The method of claim 1, wherein the PAM-F127 synergistically reinforced hydrogel electrolyte is prepared by the steps of: (a) mixing PAM-F127 and a salt to form a mixture; (b) adding a solvent to the mixture to form a solution; and (c) freezing the solution to form a gel. In step (2), the polymer monomer is at least one of acrylamide, isopropyl acrylamide, dimethyl acrylamide or acrylic acid.

4. The method of claim 1, wherein the PAM-F127 synergistically reinforced hydrogel electrolyte is prepared by the steps of: (a) mixing PAM-F127 and a salt to form a mixture; (b) adding a solvent to the mixture to form a solution; and (c) freezing the solution to form a gel. In step (2), the crosslinking agent is at least one of N,N'-methylenebisacrylamide, N,N,N',N'-tetramethylethylenediamine or ethylene glycol dimethacrylate; and the initiator is at least one of acyl peroxide, hydrogen peroxide, sodium persulfate, peroxymaleamide, ethylenediamine, a five-membered ring amine, sodium bisulfite or ammonium bisulfite.

5. The method for preparing the PAM-F127 synergistically enhanced hydrogel electrolyte according to claim 1, characterized in that, In step (1), the solubility of the zinc salt solution is 0.8-1.2 mol / L.

6. The method of claim 1, wherein the PAM-F127 synergistically reinforced hydrogel electrolyte is prepared by the steps of: In step (1), the mass ratio of the zinc salt solution to the polymer monomer is 10:3-10:1; the mass ratio of the polymer monomer to the crosslinking agent is 200:1-500:1; and the mass ratio of the polymer monomer to the initiator is 100:1-200:

1.

7. The method for preparing the PAM-F127 synergistically enhanced hydrogel electrolyte according to claim 1, characterized in that, In step (2), the temperature of the thermal initiation polymerization reaction is 60-80°C, and the time of the thermal initiation polymerization reaction is 2-4 h.

8. The method of claim 1, wherein the PAM-F127 synergistically reinforced hydrogel electrolyte is prepared by the steps of: (a) mixing PAM-F127 and a salt to form a mixture; (b) adding a solvent to the mixture to form a solution; and (c) freezing the solution to form a gel. In step (1), the weak coordination electrolyte zinc salt is mixed with water, and is stirred and dissolved under a sealed condition to obtain a uniform zinc salt solution.

9. A PAM-F127 synergistically enhanced hydrogel electrolyte prepared by the method of claim 1, and application of the PAM-F127 synergistically enhanced hydrogel electrolyte in a battery.

10. Use according to claim 9, characterized in that, In a flexible zinc ion battery, the flexible zinc ion battery comprises a positive electrode, a negative electrode and a PAM-F127 synergistically enhanced hydrogel electrolyte layer between the positive electrode and the negative electrode, and the positive electrode, the negative electrode and the PAM-F127 synergistically enhanced hydrogel electrolyte layer form a sandwich structure flexible zinc ion battery.

Images