Preparation method of pre-lithiated positive electrode of solid-state lithium-sulfur battery
By combining fluconazole and lithium coordination with functionalized carbon nanotubes in solid-state lithium-sulfur batteries, the prelithiated positive electrode is prepared, which solves the problem of limited carrier transmission path in solid-state lithium-sulfur batteries, and efficient electron and ion transmission is achieved, improving the discharge specific capacity and stability of the battery.
Patent Information
- Application Number
- CN202510414066.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2025-07-04
AI Technical Summary
The conversion reaction of sulfur in solid lithium-sulfur batteries is limited by inefficient carrier transmission paths and insufficient solid contact, resulting in slow charge transfer rates and large volume changes, which affect the actual capacity and life of the battery.
Fluconazole and lithium coordination are combined with functionalized carbon nanotubes, and a prelithiated positive electrode is prepared by melting sublimation of sulfur and binder, providing high conductivity and good ion transport paths, enhancing the contact between the positive electrode and the solid electrolyte.
It improves the utilization rate of active substances, achieves a solid lithium-sulfur battery with long life and stable circulation, and improves the discharge specific capacity and electrochemical stability of the battery.
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Figure CN120261490A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of the manufacture of the positive electrode of a solid-state lithium-sulfur battery, and particularly relates to a method for preparing a prelithiated positive electrode of a solid-state lithium-sulfur battery. Background Art
[0002] Lithium-sulfur batteries have a high energy density (up to 2600 Wh kg -1 ) and low-cost sources, making them one of the most promising energy storage systems. However, their practical applications are limited by several factors, including uncontrolled lithium dendrites, the flammability of liquid electrolytes, and the notorious shuttle effect of polysulfides. Assembling a solid-state lithium-sulfur battery with a solid electrolyte to replace the traditional liquid electrolyte is a promising strategy to solve the various problems existing in liquid batteries mentioned above. Extensive investigations have shown that solid-state lithium-sulfur batteries based on solid polymer electrolytes have good interfacial compatibility with electrodes, excellent electrochemical stability, and are easy to process.
[0003] However, the inefficient carrier transport path in the composite channel of sulfur and the polymer electrolyte results in slow sulfur conversion reaction kinetics, hindering the actual capacity of solid polymer lithium-sulfur batteries. Specifically, the inherently poor Li+ conduction ability of solid polymer electrolytes limits the charge transfer rate in the sulfur / polymer solid electrolyte. In addition, due to insufficient solid / solid contact, the curvature of the electron transport path is amplified, resulting in insufficient charge carrier transport in the conductive network. Moreover, the lithiation / desulfurization of sulfur causes volume changes, further deteriorating the solid-solid contact. In liquid lithium-sulfur batteries, the liquid electrolyte easily penetrates into the positive electrode material and generates an overlapping conduction network between ions and electrons. In contrast, solid electrolytes lack fluidity, resulting in different pathways for ion and electron conduction. This makes the sulfur conversion reaction occur only at the interface where lithium ions and electrons meet. To avoid the above problems, the positive electrode can be prelithiated to provide a smooth ion transport path, and a material with a large specific surface area, high conductivity, and good contact with the solid electrolyte can be selected as the sulfur host.
[0004] In the present invention, fluconazole and lithium are coordinated, and a surfactant is used to combine with functionalized carbon nanotubes. Subsequently, sulfur is melted and sublimated, and a slurry is prepared with a binder to prepare a prelithiated lithium-sulfur cathode. Among them, the amino group in fluconazole can confine the long-chain polysulfide lithium that is easily soluble in the electrolyte to the cathode. The electronegativity of fluorine, strong charge delocalization and ion dissociation ability endow the cathode with higher ionic conductivity and electronic conductivity. Lithiated fluconazole can provide a path for the transport of lithium ions in the solid electrolyte. In addition to the conductivity and pore structure that prevent volume expansion inherent in carbon nanotubes themselves, functionalized carbon nanotubes can not only bind more uniformly and tightly with lithiated fluconazole, but also have better affinity with the electrolyte. The electrode sheet is assembled into a solid-state lithium-sulfur battery, which can enable the persistent and efficient transport of electrons / ions in the battery, thereby improving the utilization rate of active substances and realizing a long-life, stable cycling solid-state lithium-sulfur battery. Summary of the Invention
[0005] The object of the present invention is specifically achieved through the following technical solutions:
[0006] A method for preparing a prelithiated cathode of a solid-state lithium-sulfur battery, comprising the following steps:
[0007] S1: Mix fluconazole and an inorganic compound of lithium and dissolve them in a solvent. After adding a buffer solution to adjust the mixed solution to a certain pH, place it in a high-temperature reaction kettle, heat it to coordinate, and centrifuge to collect solid A; Mix the obtained solid A, a surfactant and functionalized carbon nanotubes and dissolve them in water, sonicate for one day, and centrifuge to collect solid B; Vacuum melt and mix the obtained solid B with sulfur to obtain solid C;
[0008] S2: Mix and grind the solid C prepared in S1 with a binder to make a slurry, and evenly coat the slurry on an aluminum foil with a spatula, and dry it in a vacuum oven to obtain a positive electrode sheet. In a glove box filled with argon, a fluorinated lithium salt and a polymer containing strong polar groups are stirred and dissolved in an organic solvent to obtain a slurry D, and it is coated on a glass plate and dried to obtain a PEO-based solid electrolyte.
[0009] Cut the positive electrode sheet prepared above into a circular sheet with a diameter of 12 mm as the positive electrode of the battery, cut the solid electrolyte prepared above into a circular sheet with a diameter of 16 mm as the separator and electrolyte of the battery, and cut the lithium sheet into a 16-mm circular sheet as the negative electrode of the battery. In a glove box with a water content and an oxygen content both lower than 0.01 ppm and filled with an argon atmosphere, assemble and seal it into a CR2032-type button battery in the order of the positive electrode case, the positive electrode sheet, the solid electrolyte, the lithium sheet, the steel sheet, the gasket, and the negative electrode case.
[0010] Preferably, the inorganic compound of lithium in step S1 is at least one of lithium chloride, lithium hydroxide, lithium bromide, lithium iodide, lithium oxide, lithium hydride, lithium nitride, lithium fluoride, lithium carbonate, and lithium sulfate; the molar ratio of the inorganic compound of lithium to fluconazole is 1:0.5 - 2.
[0011] Preferably, the buffer solution in step S1 is at least one of sodium dihydrogen phosphate / disodium hydrogen phosphate, acetic acid / sodium acetate, citric acid / sodium citrate, sodium barbital / hydrochloric acid; the mixed solution is adjusted to a pH value of 4 - 7.
[0012] Preferably, the solvent in step S1 is at least one of methanol, water, dimethyl sulfoxide, N,N - dimethylformamide, ethanol, ether, chloroform, acetone; the concentration of fluconazole in the solvent is 0.01 - 0.09 mol / L.
[0013] Preferably, the heating temperature in step S1 is 100 - 200 °C, and the heating time is 24 - 96 h.
[0014] Preferably, the surfactant in step S1 is at least one of cetyltrimethylammonium bromide, sodium dodecyl sulfate, sodium dodecyl sulfonate, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, cetyltrimethylammonium bromide, cetyltrimethylammonium chloride, dodecyltrimethylammonium bromide, polyvinylpyrrolidone, carboxymethyl cellulose, carbopol, sodium alginate.
[0015] Preferably, the functionalized carbon nanotubes in step S1 are at least one of hydroxylated carbon nanotubes, carboxylated carbon nanotubes, and amino - functionalized carbon nanotubes.
[0016] Preferably, the mass ratio of solid A, surfactant, and functionalized carbon nanotubes in step S1 is 1:0.1 - 0.3:0.2 - 1.2.
[0017] Preferably, the mass ratio of the conductive material and elemental sulfur in step S2 is 1:1 - 5.
[0018] Preferably, the temperature of molten sulfur in step S2 is 130 - 170 °C; the time for melting sulfur is 8 - 16 h.
[0019] Preferably, the binder in step S2 is at least one of sodium carboxymethyl cellulose, polyvinylidene fluoride, polyethylene oxide, sodium alginate, polyvinyl alcohol, polymethyl methacrylate, polytetrafluoroethylene, polyacrylic acid, polyacrylonitrile, polyacrylate; the mass ratio of the binder to solid C is 1:7 - 11.
[0020] Preferably, the fluorinated lithium salt in step S2 is at least one of LiTFSI, LiFSI, LiPF6, LiBF4, LiTF; in slurry D, the concentration of the lithium salt is 0.01 - 0.05 g / mL.
[0021] Preferably, the polymer containing strong polar groups in step S2 is at least one of polyethylene oxide (PEO), polyacrylonitrile (PAN), polyvinylidene fluoride (PVDF), polymethyl methacrylate (PMMA), polycarbonate (PC), and polyethylene (PE); in slurry D, the concentration of the polymer containing strong polar groups is 0.05-0.1 g / mL.
[0022] Preferably, the organic solvent in step S2 is at least one of acetonitrile, ethanol, methanol, N,N-dimethylformamide, acetonitrile, acetone and propionitrile. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a cycle performance diagram of Examples 1-4 of the present invention and Comparative Examples 1-3. Figure 2 The impedance diagrams of Examples 1-4 and Comparative Examples 1-3 of the present invention are shown. DETAILED DESCRIPTION
[0024] Example 1
[0025] S1: Fluconazole (3.06 g, 10 mM) and lithium chloride (0.425 g, 10 mM) were mixed and dissolved in 200 mL of water, and the buffer solution was adjusted to pH = 5 and placed in a high-temperature reactor at 140°C for 60 h, heated to make it coordinated, and solid A was collected by centrifugation; 2 g of solid A, 0.4 g of polyvinyl pyrrolidone and 1.6 g of hydroxylated carbon nanotubes were weighed and mixed and dissolved in water, ultrasonicated for one day, and solid B was collected by centrifugation; 1 g of solid B was uniformly mixed with 3 g of sulfur, and heated at 155°C in vacuum for 12 h to obtain solid C;
[0026] S2: 1.8g solid C and 0.2g PEO were fully ground into slurry, and the slurry was evenly coated on aluminum foil with a scraper, and dried in a vacuum oven to obtain a positive electrode. In an argon-filled glove box, 0.3g LiTFSI and 0.75g PEO were stirred and dissolved in 10mL anhydrous acetonitrile, coated on a glass plate and dried to obtain a solid electrolyte.
[0027] The prepared positive electrode sheet was cut into a circular sheet with a diameter of 12 mm as the positive electrode of the battery, the prepared solid electrolyte was cut into a circular sheet with a diameter of 16 mm as the separator and electrolyte of the battery, and the lithium sheet was cut into a circular sheet with a diameter of 16 mm as the negative electrode of the battery. In a glove box filled with argon atmosphere with a water content and an oxygen content of less than 0.01 ppm, the positive electrode shell, the positive electrode sheet, the solid electrolyte, the lithium sheet, the steel sheet, the gasket, and the negative electrode shell were sealed and assembled into a CR2032 button battery.
[0028] After the battery was assembled, it was placed at 60°C for 12 hours and then subjected to charge and discharge tests. The discharge capacity after 150 cycles at a voltage of 1.7-2.8V and a current density of 0.2C was 978.5mAh g-1 Meanwhile, through electrochemical impedance testing, the battery resistance R was obtained to be approximately 79.3 Ω.
[0029] Example 2
[0030] S1: Mix fluconazole (3.06 g, 10 mM) and lithium hydroxide (0.12 g, 5 mM), dissolve them in 50 mL of water, adjust the buffer solution to pH = 4, place them in a high-temperature reaction kettle at 120 °C for 72 h, heat to make them coordinate, and centrifuge to collect solid A; Weigh 2 g of solid A, mix 0.2 g of cetyltrimethylammonium bromide and 0.4 g of carboxylated carbon nanotubes and dissolve them in water, sonicate for one day, and centrifuge to collect solid B; Uniformly mix 1 g of solid B with 3 g of sulfur, and vacuum heat at 155 °C for 12 h to obtain solid C;
[0031] S2: Take 1.4 g of solid C and grind it thoroughly with 0.2 g of polyacrylic acid to make a slurry, use a spatula to evenly coat the slurry on the aluminum foil, and dry it in a vacuum oven to obtain the positive electrode plate. In a glove box filled with argon, 0.3 g of LiTFSI and 0.75 g of PEO are stirred and dissolved in 10 mL of anhydrous acetonitrile, coated on a glass plate and dried to obtain the solid electrolyte.
[0032] Cut the above-prepared positive electrode plate into a circular piece with a diameter of 12 mm as the positive electrode of the battery, cut the above-prepared solid electrolyte into a circular piece with a diameter of 16 mm as the separator and electrolyte of the battery, and cut the lithium sheet into a 16 mm circular piece as the negative electrode of the battery. In a glove box with a water content and oxygen content both lower than 0.01 ppm and filled with an argon atmosphere, assemble and seal it into a CR2032 type button battery in the order of the positive electrode case, positive electrode plate, solid electrolyte, lithium sheet, steel sheet, gasket, and negative electrode case.
[0033] After the battery assembly is completed, let it stand at 60 °C for 12 h and then perform charge-discharge testing. At a voltage of 1.7 - 2.8 V, the discharge specific capacity after cycling 150 times at a current density of 0.2C is 910.0 mAh g -1 Meanwhile, through electrochemical impedance testing, the battery resistance R was obtained to be approximately 90.8 Ω.
[0034] Example 3
[0035] S1: Mix fluconazole (3.06 g, 10 mM) and lithium sulfate (2.2 g, 20 mM), dissolve them in 100 mL of water, adjust the buffer solution to pH = 7, place them in a high-temperature reaction kettle at 180 °C for 24 h, heat to make them coordinate, and centrifuge to collect solid A; Weigh 2 g of solid A, mix 0.6 g of sodium dodecylbenzenesulfonate and 2.4 g of hydroxylated carbon nanotubes and dissolve them in water, sonicate for one day, and centrifuge to collect solid B; Uniformly mix 1 g of solid B with 3 g of sulfur, and vacuum heat at 155 °C for 12 h to obtain solid C;
[0036] S2: Take 2.2 g of solid C and 0.2 g of polyvinylidene fluoride and grind them thoroughly to form a slurry. Use a spatula to evenly coat the slurry on the aluminum foil and dry it in a vacuum oven. In a glove box filled with argon, 0.3 g of LiTFSI and 0.75 g of PEO are stirred and dissolved in 10 mL of anhydrous acetonitrile, and then coated on a glass plate and dried to obtain a solid electrolyte.
[0037] Cut the above-prepared positive electrode sheet into circular sheets with a diameter of 12 mm as the positive electrode of the battery, cut the above-prepared solid electrolyte into circular sheets with a diameter of 16 mm as the separator and electrolyte of the battery, and cut the lithium sheet into a circular sheet with a diameter of 16 mm as the negative electrode of the battery. In a glove box with a water content and oxygen content both lower than 0.01 ppm and filled with an argon atmosphere, assemble and seal it into a CR2032 type button battery in the order of positive electrode case, positive electrode sheet, solid electrolyte, lithium sheet, steel sheet, gasket, and negative electrode case.
[0038] After the battery assembly is completed, let it stand at 60 °C for 12 h and then conduct charge-discharge tests. At a voltage of 1.7 - 2.8 V and a current density of 0.2 C, the discharge specific capacity after 150 cycles is 867.4 mAh g -1 . At the same time, through electrochemical impedance testing, the battery resistance R is about 113.8 Ω.
[0039] Example 4
[0040] S1: Mix fluconazole (3.06 g, 10 mM) and lithium chloride (1.305 g, 15 mM) and dissolve them in 150 mL of water. Adjust the buffer solution to pH = 6 and place it in a high-temperature reaction kettle at 200 °C for 48 h, heat it to make it coordinate, and centrifuge to collect solid A; Weigh 2 g of solid A, 0.4 g of dodecyltrimethylammonium bromide, and 1.2 g of hydroxylated carbon nanotubes, mix them and dissolve them in water, sonicate for one day, and centrifuge to collect solid B; Uniformly mix 1 g of solid B with 3 g of sulfur, and vacuum heat it at 155 °C for 12 h to obtain solid C;
[0041] S2: Take 2.0 g of solid C and 0.2 g of sodium carboxymethyl cellulose, dissolve them in water, grind them thoroughly to form a slurry, use a spatula to evenly coat the slurry on the aluminum foil, and dry it in a vacuum oven to obtain a positive electrode sheet. In a glove box filled with argon, 0.3 g of LiTFSI and 0.75 g of PEO are stirred and dissolved in 10 mL of anhydrous acetonitrile, and then coated on a glass plate and dried to obtain a solid electrolyte.
[0042] The positive electrode plate prepared above was cut into a circular sheet with a diameter of 12 mm as the positive electrode of the battery, and the solid electrolyte prepared above was cut into a circular sheet with a diameter of 16 mm as the separator and electrolyte of the battery. The lithium sheet was cut into a 16-mm circular sheet as the negative electrode of the battery. In a glove box with a water content and an oxygen content both lower than 0.01 ppm and filled with an argon atmosphere, a CR2032 coin cell was hermetically assembled in the order of the positive electrode case, the positive electrode plate, the solid electrolyte, the lithium sheet, the steel sheet, the gasket, and the negative electrode case.
[0043] After the battery assembly was completed, it was left standing at 60 °C for 12 h and then charge-discharge tests were carried out. At a voltage of 1.7 - 2.8 V and a current density of 0.2 C, the discharge specific capacity after 150 cycles was 832.1 mAh g -1 . At the same time, through electrochemical impedance testing, the battery resistance R was obtained to be approximately 112.0 Ω.
[0044] Comparative Example 1
[0045] S1: Weigh 2 g of fluconazole, 0.4 g of polyvinylpyrrolidone, and 1.6 g of hydroxylated carbon nanotubes, mix and dissolve them in water, and ultrasonicate for one day. Centrifuge to collect solid A; uniformly mix 1 g of solid B with 3 g of sulfur, and vacuum heat at 155 °C for 12 h to obtain solid B;
[0046] S2: Take 1.8 g of solid B and 0.2 g of PEO, dissolve them in water and grind them thoroughly to make a slurry. Use a spatula to evenly coat the slurry on the aluminum foil, and dry it in a vacuum oven to obtain the positive electrode plate. In a glove box filled with argon, 0.3 g of LiTFSI and 0.75 g of PEO are stirred and dissolved in 10 mL of anhydrous acetonitrile, coated on a glass plate and dried to obtain the solid electrolyte.
[0047] The positive electrode plate prepared above was cut into a circular sheet with a diameter of 12 mm as the positive electrode of the battery, and the solid electrolyte prepared above was cut into a circular sheet with a diameter of 16 mm as the separator and electrolyte of the battery. The lithium sheet was cut into a 16-mm circular sheet as the negative electrode of the battery. In a glove box with a water content and an oxygen content both lower than 0.01 ppm and filled with an argon atmosphere, a CR2032 coin cell was hermetically assembled in the order of the positive electrode case, the positive electrode plate, the solid electrolyte, the lithium sheet, the steel sheet, the gasket, and the negative electrode case.
[0048] After the battery assembly was completed, it was left standing at 60 °C for 12 h and then charge-discharge tests were carried out. At a voltage of 1.7 - 2.8 V and a current density of 0.2 C, the discharge specific capacity after 150 cycles was 227.7 mAh g -1 . At the same time, through electrochemical impedance testing, the battery resistance R was obtained to be approximately 347.3 Ω.
[0049] Comparative Example 2
[0050] S1: Weigh 2 g of lithium chloride, 0.4 g of polyvinylpyrrolidone and 1.6 g of hydroxylated carbon nanotubes, mix them and dissolve in water, sonicate for one day, and centrifuge to collect solid A; uniformly mix 1 g of solid A with 3 g of sulfur, and vacuum heat at 155 °C for 12 h to obtain solid B;
[0051] S2: Take 1.8 g of solid B and 0.2 g of PEO, dissolve them in water and grind well to make a slurry, use a spatula to evenly coat the slurry on the aluminum foil, and dry in a vacuum oven to obtain the positive electrode plate. In a glove box filled with argon, stir and dissolve 0.3 g of LiTFSI and 0.75 g of PEO in 10 mL of anhydrous acetonitrile, coat it on a glass plate and dry it to obtain the solid electrolyte.
[0052] Cut the above-prepared positive electrode plate into a circular piece with a diameter of 12 mm as the positive electrode of the battery, cut the above-prepared solid electrolyte into a circular piece with a diameter of 16 mm as the separator and electrolyte of the battery, and cut the lithium sheet into a 16-mm circular piece as the negative electrode of the battery. In a glove box with a water content and oxygen content both lower than 0.01 ppm and filled with an argon atmosphere, assemble and seal into a CR2032 coin cell in the order of positive electrode case, positive electrode plate, solid electrolyte, lithium sheet, steel sheet, gasket, negative electrode case.
[0053] After the battery assembly is completed, let it stand at 60 °C for 12 h and then perform charge-discharge tests. At a voltage of 1.7 - 2.8 V and a current density of 0.2 C, the discharge specific capacity after 150 cycles is 149.0 mAh g -1 . At the same time, through electrochemical impedance testing, the battery resistance R is about 376 Ω.
[0054] Comparative Example 3
[0055] Uniformly mix 1 g of hydroxylated carbon nanotubes with 3 g of sulfur, and vacuum heat at 155 °C for 12 h to obtain A; take 1.8 g of solid A and 0.2 g of PEO, dissolve them in water and grind well to make a slurry, use a spatula to evenly coat the slurry on the aluminum foil, and dry in a vacuum oven to obtain the positive electrode plate. In a glove box filled with argon, stir and dissolve 0.3 g of LiTFSI and 0.75 g of PEO in 10 mL of anhydrous acetonitrile, coat it on a glass plate and dry it to obtain the solid electrolyte.
[0056] Cut the above-prepared positive electrode plate into a circular piece with a diameter of 12 mm as the positive electrode of the battery, cut the above-prepared solid electrolyte into a circular piece with a diameter of 16 mm as the separator and electrolyte of the battery, and cut the lithium sheet into a 16-mm circular piece as the negative electrode of the battery. In a glove box with a water content and oxygen content both lower than 0.01 ppm and filled with an argon atmosphere, assemble and seal into a CR2032 coin cell in the order of positive electrode case, positive electrode plate, solid electrolyte, lithium sheet, steel sheet, gasket, negative electrode case.
[0057] After the battery is assembled, it is left standing at 60 °C for 12 h and then charge-discharge tests are carried out. At a voltage of 1.7 - 2.8 V, the discharge specific capacity after 150 cycles at a current density of 0.2C is 135.2 mAh g -1 . At the same time, through electrochemical impedance testing, the battery resistance R is obtained to be approximately 450.3 Ω.
Claims
1. A method for preparing a prelithiated cathode of a solid-state lithium-sulfur battery, characterized in that, It includes the following steps: S1: Mix fluconazole and an inorganic compound of lithium and dissolve them in a solvent. After adding a buffer solution to adjust the mixed solution to a certain pH, place it in a high-temperature reaction kettle, heat it to make it coordinate, and centrifuge to collect solid A; S2: Ultrasonically mix and dissolve solid A obtained in S1, a surfactant, and functionalized carbon nanotubes, and centrifuge to collect solid B; Vacuum melt and mix solid B obtained in S2 with sulfur to obtain solid C; S3: Mix and grind solid C prepared in S2 with a binder to make a slurry, and evenly coat the slurry on aluminum foil with a scraper, and dry it in a vacuum oven to obtain a lithium-sulfur positive electrode.
2. The preparation method of a pre-lithiated cathode for a solid-state lithium-sulfur battery according to claim 1, characterized in that, The inorganic compound of lithium described in step S1 is at least one of lithium chloride, lithium hydroxide, lithium bromide, lithium iodide, lithium oxide, lithium hydride, lithium nitride, lithium fluoride, lithium carbonate, and lithium sulfate; The molar ratio of the inorganic compound of lithium to fluconazole is 1:0.5 - 2.
3. The preparation method of a pre-lithiated cathode for a solid-state lithium-sulfur battery according to claim 1, wherein, The buffer solution described in step S1 is at least one of sodium dihydrogen phosphate / disodium hydrogen phosphate, acetic acid / sodium acetate, citric acid / sodium citrate, and sodium barbital / hydrochloric acid; Adjust the mixed solution to a pH value of 4 - 7.
4. The preparation method of a pre-lithiated cathode for a solid-state lithium-sulfur battery according to claim 1, wherein, The solvent described in step S1 is at least one of methanol, water, dimethyl sulfoxide, N,N-dimethylformamide, ethanol, ether, chloroform, and acetone; The concentration of fluconazole in the solvent is 0.01 - 0.09 mol / L.
5. The preparation method of a pre-lithiated cathode for a solid-state lithium-sulfur battery according to claim 1, wherein, The heating temperature described in step S1 is 100 - 200 °C, and the heating time is 24 - 96 h.
6. The preparation method of a pre-lithiated cathode for a solid-state lithium-sulfur battery according to claim 1, characterized in that, The surfactant described in step S2 is at least one of cetyltrimethylammonium bromide, sodium dodecyl sulfate, sodium dodecyl sulfonate, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, cetyltrimethylammonium bromide, cetyltrimethylammonium chloride, dodecyltrimethylammonium bromide, polyvinylpyrrolidone, carboxymethyl cellulose, carbopol, and sodium alginate.
7. The preparation method of a prelithiated cathode for a solid-state lithium-sulfur battery according to claim 1, wherein The functionalized carbon nanotubes described in step S2 are at least one of hydroxylated carbon nanotubes, carboxylated carbon nanotubes, and aminated carbon nanotubes.
8. The preparation method of a pre-lithiated cathode for a solid-state lithium-sulfur battery according to claim 1, wherein, The mass ratio of solid A, the surfactant, and the functionalized carbon nanotubes is 1:0.1 - 0.3:0.2 - 1.
2.
9. The preparation method of a pre-lithiated cathode for a solid-state lithium-sulfur battery according to claim 1, wherein, The binder described in step S3 is at least one of sodium carboxymethylcellulose, polyvinylidene fluoride, polyethylene oxide, sodium alginate, polyvinyl alcohol, polymethyl methacrylate, polytetrafluoroethylene, polyacrylic acid, polyacrylonitrile, and polyacrylate; The mass ratio of the binder to solid C is 1:7 - 11.
10. A pre-lithiated cathode for a solid-state lithium-sulfur battery, characterized in that, It is prepared by using the preparation method described in any one of claims 1 to 9.