Application of in-situ grown silver nanowires modified carbon monofluoride and lithium primary battery
By growing a silver nanowire conductive network in situ on the surface of fluorinated carbon, the problem of insufficient electronic conductivity of fluorinated carbon was solved, the discharge performance and voltage plateau of lithium fluorinated carbon batteries were improved, and a balance between high energy density and high rate performance was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNIV OF ELECTRONICS SCI & TECH OF CHINA
- Filing Date
- 2023-02-09
- Publication Date
- 2026-05-29
AI Technical Summary
The electronic conductivity of fluorinated carbon is affected by the degree of fluorination, resulting in lower conductivity and battery reaction kinetics, which hinders the balance between power density and energy density.
A hydrothermal method was used to grow a silver nanowire conductive network in situ on the surface of fluorinated carbon, which improved the electronic conductivity of the fluorinated carbon cathode material and the rate performance of the battery, and reduced discharge polarization and voltage delay.
In-situ growth of silver nanowire conductive networks significantly improved the conductivity of fluorinated carbon materials, enhanced battery discharge performance, reduced temperature rise during discharge, and improved voltage plateau and rate performance.
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Figure CN115966693B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of fluorinated carbon cathode material modification technology, and in particular to a method for preparing fluorinated carbon cathode materials modified by in-situ growth of silver nanowire conductive networks and their application in lithium primary batteries. Background Technology
[0002] Lithium / carbon fluoride (CFx) batteries are primary batteries composed of CFx as the positive electrode active material and lithium metal as the negative electrode material. Currently, common lithium primary batteries include lithium / manganese dioxide batteries, lithium / sulfur dioxide batteries, lithium / thionyl chloride batteries, and lithium / CFx batteries. Among them, lithium / CFx batteries have the highest theoretical energy density, reaching 2180 Wh / kg, and their practical specific energy can reach 250–800 Wh / kg. In addition, lithium / CFx batteries also feature a wide operating temperature range, stable discharge platform, low self-discharge, and no pollution. Lithium / CFx batteries are widely used in power supply systems for individual soldiers and active implantable medical devices, and are expected to serve as power sources for missiles and launch vehicles in the future, showing broad development prospects.
[0003] CN201811406243.X discloses a method for preparing Ag@C modified fluorinated carbon electrode material. The preparation process of this positive electrode material is as follows: Ag compound and solvent are mixed, and then fluorinated carbon and NaOH or KOH aqueous solution with a mass fraction of 15-25% are added sequentially. After heating, a reducing agent is added to react. After filtration, washing, drying, grinding, and passing through a 100-200 mesh sieve, the Ag@C modified fluorinated carbon electrode material is obtained. In this method, while the Ag compound is reduced to Ag by chemical reduction, part of the fluorinated carbon material is reduced to C. This application uses Ag@C to modify the fluorinated carbon material. The Ag@C is uniformly coated on the surface of the fluorinated carbon material, which increases the conductivity of the fluorinated carbon material, effectively improves the voltage hysteresis and low-temperature performance of the fluorinated carbon material, and improves the rate performance of lithium fluorinated carbon batteries.
[0004] CN202111231404.8 This invention discloses a lithium / carbon fluoride battery cathode sheet modified with ZnNi / C composite material and its preparation method, including the following steps: First, zinc source, nickel source and carbon source are mixed according to the molar ratio of zinc, nickel and carbon atoms 1:(5-20):(20-50), and ground to obtain mixture A. Mixture A is placed in a high-temperature tube furnace, inert gas is introduced, and the temperature is raised from room temperature to 150-250℃ at 10-30℃ / min, and held for 0.5-2h to obtain product B; Product B was ground and sealed in a glove box in a test tube filled with inert gas. The tube was then heated to 400-700℃ in an electromagnetic induction heater and cooled to obtain a ZnNi / C composite material. Fluorocarbon, the ZnNi / C composite material, and a binder were mixed in a mass ratio of (7-9):(0.5-2):(0.5-1). A solvent was added dropwise and the mixture was stirred to obtain a flowable positive electrode slurry. This slurry was then coated onto aluminum foil and dried to obtain a ZnNi / C composite material-modified lithium / fluorocarbon battery positive electrode. This improved the conductivity of the positive electrode, thereby increasing the battery's specific capacity, storage performance, and rate performance.
[0005] Since the electronic conductivity of fluorinated carbon is affected by the degree of fluorination, the introduction of excess fluorine atoms leads to relatively low conductivity of CFx and low battery reaction kinetics, thus hindering the balance between power density and energy density. Therefore, providing a method to improve the specific energy of lithium fluorinated carbon batteries, enhance cathode conductivity and rate performance, and its preparation method is of significant practical importance. Summary of the Invention
[0006] The purpose of this invention is to utilize a hydrothermal method to grow a conductive network of silver nanowires in situ on the surface of fluorinated carbon, thereby improving the electronic conductivity of the fluorinated carbon cathode material and the rate performance of the battery, while reducing discharge polarization and voltage delay. Experiments have shown that in-situ grown silver nanowires can also improve the voltage plateau of Li / CFx primary batteries. The hydrothermal method is simple to operate and can produce fluorinated carbon cathode materials with good conductivity in large quantities.
[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:
[0008] An application of in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries is characterized by the following steps:
[0009] Step 1: Weigh the specified amount of fluorinated carbon powder, add it to the ethylene glycol (EG) solution and mix it evenly using ultrasonic / magnetic stirring. Then add a small amount of silver nitrate to the solution system and continue stirring for 0.6 to 1.5 hours until homogeneous to obtain a mixed reaction solution.
[0010] Step 2: Place the mixed reaction solution in a hydrothermal reactor, grow it at a constant temperature in an oven, and then dry the mixed reaction solution by rotary evaporation to obtain fluorinated carbon (CFx@Ag-seed) with in-situ grown silver nanowire seeds.
[0011] Step 3: Disperse NaCl in ethylene glycol (EG) solution and stir for 12 hours until homogeneous to obtain NaCl-EG solution;
[0012] Step 4: Disperse polyvinylpyrrolidone (PVP) in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain PVP-EG mixture;
[0013] Step 5: Disperse silver nitrate in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain AgNO3-EG solution;
[0014] Step 6: Take a specified amount of CFx@Ag-seed powder, add it to ethylene glycol (EG) solution and mix it evenly using ultrasonic / magnetic stirring. At the same time, slowly add NaCl-EG solution and PVP-EG mixture. After the addition is complete, a mixed reaction solution is obtained.
[0015] Step 7: Add the prepared AgNO3-EG solution to the above mixed reaction solution and continue stirring to obtain the CFx reaction solution;
[0016] Step 8: Place the CFx reaction solution in a hydrothermal reactor and grow it at a constant temperature in an oven. Then, obtain the in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material by centrifugation, rotary evaporation and water washing.
[0017] Further, in step 1, the mass ratio of carbon fluoride to silver nitrate in the carbon fluoride dispersion is 1:(0.005~0.01).
[0018] Furthermore, in step 2, the oven is kept at a constant temperature of 100-130℃ for 1 hour.
[0019] Further, in step 2, the rotary evaporation is carried out at a temperature of 50°C for 0.5-1 h. The purpose of rotary evaporation is to remove the organic solvent ethylene glycol (EG) solution and obtain dry fluorinated carbon (CFx@Ag-seed) with in-situ grown silver nanowire seeds.
[0020] Further, in step 3, the NaCl-EG solution has a mass concentration of 0.06-0.1%. Further, in step 4, the PVP-EG mixture has a concentration of 0.06-0.1%, wherein the polyvinylpyrrolidone (PVP) has a molecular weight MW of 30,000-130,000.
[0021] Furthermore, in step 5, the concentration of the AgNO3-EG solution is 0.6% to 1.0%.
[0022] Further, in step 7, the mass ratio of CFx@Ag-seed powder to silver nitrate in the fluorinated carbon dispersion is 1:(0.05~0.1).
[0023] Furthermore, in step 8, the isothermal growth is carried out at a temperature of 100-160℃ for 3-9 hours.
[0024] Furthermore, in step 8, the centrifugation, rotary evaporation, and water washing are intended to remove impurities and obtain a dry and pure in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material.
[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0026] 1. This application uses silver nanowires with good conductivity to modify fluorinated carbon materials. The silver nanowires grow uniformly on the surface of the fluorinated carbon materials to form a conductive network, which increases the conductivity of the fluorinated carbon materials, makes up for the voltage lag problem in the early stage of discharge of fluorinated carbon materials, effectively improves the high current discharge capability of fluorinated carbon materials, improves the rate performance of lithium fluorinated carbon batteries, and reduces the temperature rise during the discharge process of lithium fluorinated carbon batteries.
[0027] 2. This application utilizes silver nanowires with good conductivity to modify fluorinated carbon materials. In-situ growth of a three-dimensional conductive network of silver nanowires on the surface of fluorinated carbon can improve the electronic conductivity of the fluorinated carbon cathode material while maintaining the energy density of the high F / C ratio fluorinated carbon material. This improves the battery's voltage plateau and rate performance, and reduces discharge polarization and voltage delay. The hydrothermal method is simple to operate and can produce fluorinated carbon cathode materials with good conductivity in large quantities.
[0028] 3. The difference between the in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material and the common manganese dioxide and silver metavanadate modified fluorinated carbon cathode material is that the conductivity improvement of the manganese dioxide and silver metavanadate modified fluorinated carbon electrode is equivalent to the synergistic reaction of the composite electrode. Manganese dioxide and silver metavanadate can react chemically with fluorinated carbon to achieve energy superposition. However, the present invention uses silver nanowires with better conductivity to modify the fluorinated carbon material, increase the conductivity of the fluorinated carbon material, and the voltage hysteresis improvement effect of the fluorinated carbon material is more obvious. At the same time, it can also improve the voltage plateau and reduce the temperature rise during the discharge process.
[0029] 4. The difference between the in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material and the Ag@C modified fluorinated carbon material is that the silver nanowires are used directly and dried in an oven, making the preparation process simple. In addition, an alkaline solution is used in the preparation of Ag@C modified fluorinated carbon material to remove a certain amount of fluorine content, thereby reducing the fluorinated carbon content and decreasing the capacity of the cathode material.
[0030] 5. Applying the in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material to lithium fluorinated carbon batteries effectively improves the voltage hysteresis of the fluorinated carbon electrode and increases the plateau voltage, with significant results. Compared with existing fluorinated carbon electrodes, the voltage hysteresis and plateau voltage are greatly improved, significantly enhancing the electrode's discharge performance.
[0031] 6. Compared with existing methods of coating modified fluorocarbon materials with conductive polymers such as polyaniline and polythiophene, the technical solution of the present invention can not only effectively improve the voltage hysteresis problem of fluorocarbon electrodes, but also does not use toxic and harmful substances, will not pollute the environment, and is environmentally friendly.
[0032] 7. The silver nanowire conductive network modified fluorinated carbon cathode material grown in situ in this application is different from simple mechanical ball milling, grinding, and compounding. The silver nanowires are not simply adsorbed on the surface of fluorinated carbon, but are embedded and grown inside the fluorinated carbon to form a conductive network.
[0033] 8. This invention uses a hydrothermal method, which has simple operation steps, low risk factor and is suitable for mass production. A small amount of composite silver nanowires can improve the rate performance while ensuring the high energy density of fluorinated carbon batteries. Attached Figure Description
[0034] Figure 1 This is a scanning electron microscope (SEM) image of the in-situ grown silver nanowire conductive network fluorinated carbon cathode material from Example 1.
[0035] Figure 2 The discharge curves of the original fluorinated carbon sample-lithium primary battery before modification in Comparative Example 1 at different rates at 25°C are shown.
[0036] Figure 3 This is a graph showing the discharge curves of a fluorinated carbon-lithium primary battery with an in-situ grown silver nanowire conductive network in Example 1 at different rates at 25°C.
[0037] Figure 4 The above are EIS impedance comparison diagrams of the performance of fluorinated carbon-lithium primary batteries in Example 1 and Comparative Example 1, showing the original fluorinated carbon sample and the in-situ grown silver nanowire conductive network. Detailed Implementation
[0038] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific examples.
[0039] Example 1
[0040] An application of in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries is characterized by the following steps:
[0041] Step 1: Weigh carbon fluoride and silver nitrate according to a mass ratio of 1:0.005, add them to ethylene glycol (EG) solution, and mix them evenly using ultrasonic / magnetic stirring. Then add a small amount of silver nitrate to the solution system and continue stirring for 0.6 to 1.5 hours until homogeneous to obtain a mixed reaction solution.
[0042] Step 2: Place the mixed reaction solution in a hydrothermal reactor, place it in an oven and grow it at a constant temperature of 130℃ for 1 hour, and then dry it at 50℃ for 0.5 hours by rotary evaporation to obtain fluorinated carbon (CFx@Ag-seed) with in-situ grown silver nanowire seeds.
[0043] Step 3: Disperse NaCl in ethylene glycol (EG) solution and stir for 12 hours until homogeneous to obtain a 0.06% NaCl-EG solution;
[0044] Step 4: Disperse polyvinylpyrrolidone (PVP) in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain a 0.06% PVP-EG mixture;
[0045] Step 5: Disperse silver nitrate in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain 0.6% AgNO3-EG solution.
[0046] Step 6: Take the specified amount of CFx@Ag-seed powder, add it to ethylene glycol (EG) solution and mix it evenly using ultrasonic / magnetic stirring. At the same time, slowly add NaCl-EG solution and PVP-EG mixture. After the addition is complete, a mixed reaction solution is obtained.
[0047] Step 7: Add the prepared AgNO3-EG solution to the above mixed reaction solution according to the mass ratio of CFx@Ag-seed powder to silver nitrate = 1:0.05, and continue stirring to obtain the CFx reaction solution.
[0048] Step 8: Place the CFx reaction solution in a hydrothermal reactor and place it in an oven at 160°C for 3 hours for constant temperature growth. Then, obtain the in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material by centrifugation, rotary evaporation and water washing.
[0049] The SEM image of the cathode material modified with in-situ grown silver nanowire three-dimensional conductive network in this embodiment is shown below. Figure 1 As shown.
[0050] Example 2
[0051] An application of in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries is characterized by the following steps:
[0052] Step 1: Weigh carbon fluoride and silver nitrate according to a mass ratio of 1:0.007, add them to ethylene glycol (EG) solution, and mix them evenly using ultrasonic / magnetic stirring. Then add a small amount of silver nitrate to the solution system and continue stirring for 0.6 to 1.5 hours until homogeneous to obtain a mixed reaction solution.
[0053] Step 2: Place the mixed reaction solution in a hydrothermal reactor, place it in an oven and grow it at a constant temperature of 110℃ for 1 hour, and then dry it at 50℃ for 0.5 hours by rotary evaporation to obtain fluorinated carbon (CFx@Ag-seed) with in-situ grown silver nanowire seeds.
[0054] Step 3: Disperse NaCl in ethylene glycol (EG) solution and stir for 12 hours until homogeneous to obtain 0.08% NaCl-EG solution;
[0055] Step 4: Disperse polyvinylpyrrolidone (PVP) in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain a 0.08% PVP-EG mixture;
[0056] Step 5: Disperse silver nitrate in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain 0.8% AgNO3-EG solution.
[0057] Step 6: Take the specified amount of CFx@Ag-seed powder, add it to ethylene glycol (EG) solution and mix it evenly using ultrasonic / magnetic stirring. At the same time, slowly add NaCl-EG solution and PVP-EG mixture. After the addition is complete, a mixed reaction solution is obtained.
[0058] Step 7: Add the prepared AgNO3-EG solution to the above mixed reaction solution according to the mass ratio of CFx@Ag-seed powder to silver nitrate = 1:0.07, and continue stirring to obtain the CFx reaction solution.
[0059] Step 8: Place the CFx reaction solution in a hydrothermal reactor and place it in an oven at 130°C for 5 hours for constant growth. Then, obtain the in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material by centrifugation, rotary evaporation and water washing.
[0060] Example 3
[0061] An application of in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries is characterized by the following steps:
[0062] Step 1: Weigh carbon fluoride and silver nitrate according to a mass ratio of 1:0.01, add them to ethylene glycol (EG) solution, and mix them evenly using ultrasonic / magnetic stirring. Then add a small amount of silver nitrate to the solution system and continue stirring for 0.6 to 1.5 hours until homogeneous to obtain a mixed reaction solution.
[0063] Step 2: Place the mixed reaction solution in a hydrothermal reactor, place it in an oven and grow it at a constant temperature of 100℃ for 1 hour, and then dry it at 50℃ for 0.5 hours by rotary evaporation to obtain fluorinated carbon (CFx@Ag-seed) with in-situ grown silver nanowire seeds.
[0064] Step 3: Disperse NaCl in ethylene glycol (EG) solution and stir for 12 hours until homogeneous to obtain 0.1% NaCl-EG solution;
[0065] Step 4: Disperse polyvinylpyrrolidone (PVP) in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain a 0.1% PVP-EG mixture;
[0066] Step 5: Disperse silver nitrate in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain a 1.0% AgNO3-EG solution.
[0067] Step 6: Take the specified amount of CFx@Ag-seed powder, add it to ethylene glycol (EG) solution and mix it evenly using ultrasonic / magnetic stirring. At the same time, slowly add NaCl-EG solution and PVP-EG mixture. After the addition is complete, a mixed reaction solution is obtained.
[0068] Step 7: Add the prepared AgNO3-EG solution to the above mixed reaction solution according to the mass ratio of CFx@Ag-seed powder to silver nitrate = 1:0.1, and continue stirring to obtain the CFx reaction solution. Step 2: Place the mixed reaction solution in a hydrothermal reactor and then place it in an oven at 100℃ for constant temperature.
[0069] Step 8: Place the CFx reaction solution in a hydrothermal reactor and place it in an oven to grow at a constant temperature of 110°C for 7 hours. Then, obtain the in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material by centrifugation, rotary evaporation and water washing.
[0070] Comparative Example 1
[0071] The difference from Embodiment 1 of this application is that the fluorinated carbon electrode material does not contain the fluorinated carbon electrode material modified by in-situ grown silver nanowires. Instead, the fluorinated carbon electrode material modified by in-situ grown silver nanowires is replaced by ordinary fluorinated carbon electrode material, while other conditions remain unchanged.
[0072] Experimental Example 1
[0073] The fluorinated carbon electrode prepared by the method of Example 1 and Comparative Example 1 was used as the positive electrode of the battery, and lithium metal was used as the negative electrode. The lithium battery was assembled in a dry room with a relative humidity of 1%. Electrolysis experiments were carried out using an electrolyte of LiPF6 / EC:DMC:EMC = 1:1:1 with a concentration of 1 mol / L.
[0074] The lithium batteries from Example 1 and Comparative Example 1 were simultaneously subjected to discharge tests at 0.01C, 0.1C, 1C, 2C, and 3C rates at 25°C, with a cutoff voltage of 1.5V. The experimental results are as follows. Figure 2 and Figure 3 As shown in Table 1, the discharge specific capacity and specific energy of the two groups of lithium batteries with different cathode materials in Example 1 and Comparative Example 1 are as follows.
[0075] Table 1
[0076]
[0077] Table 1 shows that both the battery's specific capacity and specific energy increased under both high-rate and low-rate testing, contributing to improved practical battery performance. Figure 2 and Figure 3 It was clearly observed that, compared with the original sample, the discharge platform of the fluorinated carbon cathode material modified by the in-situ grown silver nanowire three-dimensional conductive network was improved. The working voltage platform was significantly improved, greatly enhancing the discharge performance of the electrode.
[0078] The kinetics of the lithium batteries in Example 1 and Comparative Example 1 were further revealed by electrochemical impedance spectroscopy (EIS) to examine the original fluorinated carbon and in-situ grown silver nanowire conductive networks in the fluorinated carbon-lithium primary battery. The experimental results are as follows: Figure 3 As shown, the Rct value of the fluorinated carbon-lithium primary battery with in-situ grown silver nanowire conductive network is significantly smaller than that of the original fluorinated carbon-lithium primary battery, indicating a greatly enhanced lithium-ion diffusion rate in the in-situ grown silver nanowire conductive network fluorinated carbon-lithium primary battery.
[0079] In summary, this application modifies fluorinated carbon materials using in-situ grown silver nanowires with good conductivity. The silver nanowires are not simply adsorbed onto the surface of the fluorinated carbon, but rather embedded within it to form a conductive network, increasing the conductivity of the fluorinated carbon material and effectively improving its voltage hysteresis and rate performance. Applying this in-situ grown silver nanowire-modified fluorinated carbon electrode material to lithium-fluorinated carbon batteries effectively improves the voltage hysteresis and increases the plateau voltage, demonstrating significant results. Compared to existing fluorinated carbon electrodes, the voltage hysteresis and plateau voltage are greatly improved, significantly enhancing the electrode's discharge performance.
[0080] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within the protection scope of the present invention.
Claims
1. An application of in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries, characterized in that, Includes the following steps: Step 1: Weigh the specified amount of fluorinated carbon powder, add it to the ethylene glycol (EG) solution and mix it evenly using ultrasonic / magnetic stirring. Then add a small amount of silver nitrate to the solution system and continue stirring for 0.6 to 1.5 hours until homogeneous to obtain a mixed reaction solution. Step 2: Place the mixed reaction solution in a hydrothermal reactor, grow it at a constant temperature in an oven, and then dry the mixed reaction solution by rotary evaporation to obtain fluorinated carbon (CFx@Ag-seed) with in-situ grown silver nanowire seeds. Step 3: Disperse NaCl in ethylene glycol (EG) solution and stir for 12 hours until homogeneous to obtain NaCl-EG solution; Step 4: Disperse polyvinylpyrrolidone (PVP) in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain PVP-EG mixture; Step 5: Disperse silver nitrate in ethylene glycol (EG) solution and stir for 24 hours until homogeneous to obtain AgNO3-EG solution; Step 6: Take a specified amount of CFx@Ag-seed powder, add it to ethylene glycol (EG) solution and mix it evenly using ultrasonic / magnetic stirring. At the same time, slowly add NaCl-EG solution and PVP-EG mixture. After the addition is complete, a mixed reaction solution is obtained. Step 7: Add the prepared AgNO3-EG solution to the above mixed reaction solution and continue stirring to obtain the CFx reaction solution; Step 8: Place the CFx reaction solution in a hydrothermal reactor and grow it at a constant temperature in an oven. Then, obtain the in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material by centrifugation, rotary evaporation and water washing.
2. The application of the in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries as described in claim 1, characterized in that, In step 1, the mass ratio of carbon fluoride to silver nitrate in the carbon fluoride dispersion is 1:(0.005~0.01).
3. The application of the in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries according to claim 1, characterized in that, The oven in step 2 is kept at a constant temperature of 100-130℃ for 1 hour.
4. The application of the in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries according to claim 1, characterized in that, The rotary evaporation described in step 2 is carried out at a temperature of 50°C for 0.5-1 h. The purpose of rotary evaporation is to remove the organic solvent ethylene glycol (EG) solution and obtain dry fluorinated carbon (CFx@Ag-seed) with in-situ grown silver nanowire seeds.
5. The application of the in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries as described in claim 1, characterized in that, The NaCl-EG solution mentioned in step 3 has a mass concentration of 0.06–0.1%.
6. The application of the in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries as described in claim 1, characterized in that, In step 4, the concentration of the PVP-EG mixture is 0.06-0.1%, wherein the molecular weight of polyvinylpyrrolidone (PVP) is MW = 30000-130000.
7. The application of the in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries as described in claim 1, characterized in that, In step 5, the concentration of the AgNO3-EG solution is 0.6% to 1.0%.
8. The application of the in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries as described in claim 1, characterized in that, In step 7, the mass ratio of CFx@Ag-seed powder to silver nitrate in the CFx reaction solution is 1:(0.05~0.1).
9. The application of the in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries according to claim 1, characterized in that, In step 8, the isothermal growth is carried out at a temperature of 130-160℃ for 3-9 hours.
10. The application of the in-situ grown silver nanowires modified with fluorinated carbon and lithium primary batteries according to claim 1, characterized in that, In step 8, the centrifugation, rotary evaporation, and water washing are performed to remove impurities and obtain a dry and pure in-situ grown silver nanowire three-dimensional conductive network modified fluorinated carbon cathode material.