A method of preparing a solid-state battery electrode slurry

Abstract

The application discloses a preparation method of a solid-state battery pole piece slurry, and comprises the following steps: mixing an electrolyte, a first binder and a solvent, adding a fat-soluble acid or a fat-soluble base to adjust the pH, so that the absolute value of the Zeta potential of the electrolyte slurry is greater than or equal to 10 mV; mixing an active material, a conductive agent, a second binder and a solvent, adding a fat-soluble acid or a fat-soluble base to adjust the pH, so that the active material slurry obtains the opposite charge of the charge of the electrolyte slurry, and the absolute values of the Zeta potentials of the two slurries are equal; and adding the electrolyte slurry into the active material slurry to obtain the solid-state battery pole piece slurry. The electrolyte and the active material are uniformly grinded separately, the pH of the slurry is adjusted to promote the ionization of the partial groups of the binder, so that one kind of slurry is positively charged and the other kind of slurry is negatively charged; the electrolyte slurry is positively charged, and the agglomeration is inhibited by using the electrostatic repulsion; and finally, the two kinds of slurries are mixed, the positive and negative charges are attracted to each other, the electrolyte can be uniformly coated on the surface of the active material, and the electrical performance of the pole piece is improved.

Description

Technical Field

[0001] This invention belongs to the field of solid-state battery technology, and more specifically, this invention relates to a method for preparing solid-state battery electrode slurry. Background Technology

[0002] Sulfide solid electrolytes are considered core materials for next-generation all-solid-state batteries due to their ultra-high ionic conductivity, good mechanical ductility, and interfacial compatibility with electrode materials. To maximize ion transport efficiency and reduce interfacial impedance, sulfide electrolytes typically need to be processed into nanoscale particles to increase specific surface area and shorten ion diffusion paths. However, nanoscale sulfide electrolytes suffer from severe particle agglomeration during electrode slurry preparation. These agglomerates hinder close contact between the electrolyte and active materials, leading to a significant increase in interfacial impedance. Agglomerates also act as "insulating islands," disrupting the conductive network, causing local current density distortion, and accelerating lithium dendrite growth. Furthermore, agglomerated slurries complicate coating and other manufacturing processes, reducing production efficiency and yield.

[0003] Currently, the main methods for suppressing agglomeration include ball milling, ultrasonication, and the addition of dispersants. Ball milling and ultrasonication can disrupt soft agglomerates to some extent, but the effects are often temporary, and the particles are very easy to re-agglomerate during resting or subsequent processing (secondary agglomeration). High-energy ball milling may also introduce impurities, damage the crystal structure, or cause excessive particle refinement, thereby exacerbating agglomeration. Adding traditional dispersants may have adverse reactions with the electrolyte or other components of the battery system (such as binders and conductive agents), affecting performance.

[0004] In summary, existing techniques for inhibiting electrolyte aggregation generally have significant drawbacks, such as short-lasting effects, complex processes, and the potential introduction of side effects. Summary of the Invention

[0005] One object of the present invention is to solve at least the above-mentioned problems and / or defects, and to provide at least the advantages described below.

[0006] To achieve these objectives and other advantages of the present invention, a method for preparing a solid-state battery electrode slurry is provided, comprising the following steps: Step 1: Preparation of electrolyte slurry: Mix electrolyte, first binder and solvent, stir and disperse, add fat-soluble acid or fat-soluble base to adjust pH so that the absolute value of the zeta potential of electrolyte slurry is ≥10mV; Step 2, Preparation of active material slurry: Mix the active material, conductive agent, second binder and solvent, stir and disperse, add fat-soluble acid or fat-soluble base to adjust the pH, so that the active material slurry has the opposite charge of the electrolyte slurry, and the absolute value of the Zeta potential of the active material slurry and the electrolyte slurry are equal. Step 3: Electrode slurry preparation: Add the electrolyte slurry to the stirred active material slurry, mix and continue stirring to obtain the solid-state battery electrode slurry.

[0007] Preferably, in step one, the electrolyte is Li7P3S. 11 , Li4GeS4, Li2GeS5, Li6GeS5, Li6PS5Cl, Li 5.5 PS 4.5 C l1.5 Li6PS5Br, Li6PS5I, Li 11 Si2PS 12 Li 10 SnP2S 12 Li 10 GeP2S 12 Li 3.25 Ge 0.25 P 0.75 S4, Li 10 Ge(P 1-x Sb x )2S 12 Li 6.6 Ge 0.6 P 0.4 S5I, Li 1.3 Al 0.3 Ti 1.7 (PO4)3, Li 1.5 Al 0.5 Ge 1.5 One or more of (PO4)3.

[0008] Preferably, in step two, the active material is one or more of NCM811, NCM523, NCM622, LiFePO4, graphite, silicon, silicon carbide, and lithium titanate.

[0009] Preferably, in step two, the conductive agent is one or more of Super P, carbon nanotubes (CNTs), and carbon fiber (VGCF).

[0010] Preferably, the first adhesive and the second adhesive are adhesives containing ionizable groups, including but not limited to carboxyl groups (-COOH), amino groups (-NH2), and sulfonic acid groups (-SO3H).

[0011] Preferably, the first adhesive and the second adhesive are one or more of PVBST block copolymer, polyacrylic acid-glycerol crosslinked network (PAA-GLY), and dopamine modified polyfluorene (PFPQDA).

[0012] Preferably, the solvent is one of cyclopentyl methyl ether, anisole, dibutyl ether, ethyl acetate, n-decane, butyl butyrate, toluene, xylene, and isobutyl isobutyrate.

[0013] Preferably, the fat-soluble acid is one or more of p-toluenesulfonic acid (p-TsOH), trifluoroacetic acid (TFA), camphorsulfonic acid (CSA), and boron trifluoride (BF3) complexes.

[0014] Preferably, the fat-soluble base is one or more of triethylamine (TEA), diisopropylethylamine (DIPEA), 1,8-diazabicycloundec-7-ene (DBU), and potassium tert-butoxide.

[0015] Preferably, in step one, the solid content of the electrolyte slurry is 40%~80%; the mass ratio of electrolyte to first binder is (80~99):(1~10); the stirring and dispersing speed is 10~4000 rpm, and the time is 0.5~2 hours.

[0016] Preferably, in step two, the solid content of the active material slurry is 30%~70%; the mass ratio of the active material, conductive agent, and second binder is (80~99):(0.5~10):(0.5~10); the stirring and dispersing speed is 10~4000 rpm, and the time is 1~3 hours.

[0017] Preferably, in step three, the mass ratio of electrolyte in the electrolyte slurry to active material in the active material slurry is 1:(1.5~7.5); the electrolyte slurry is added at a rate of 30~100mL / min; the stirring speed is 10~150rpm; and stirring continues for 0.5~12 hours after mixing.

[0018] The present invention includes at least the following beneficial effects: The present invention provides a method for preparing solid-state battery electrode slurry, wherein the electrolyte and active material are slurried separately, and the pH of the electrolyte slurry and the active material slurry is adjusted to induce partial ionization of the binder groups, so that one slurry carries a positive charge and the other slurry carries a negative charge; the electrolyte slurry carries the same charge, and the electrostatic repulsion is used to inhibit the formation of agglomeration; when the two slurries are finally mixed, the stirring speed and the feeding speed are controlled to attract the electrolyte to the surface of the active material by the attraction of opposite charges, so that the electrolyte can be uniformly coated on the surface of the active material, forming a dense composite particle or network structure, thereby improving the electrical performance of the electrode.

[0019] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0020] Figure 1This is a scanning electron microscope image of the solid-state battery electrode slurry prepared in Example 1 of the present invention; Figure 2 This is a scanning electron microscope image of the solid-state battery electrode slurry prepared in Comparative Example 1 of the present invention. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0022] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0023] Example 1 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh 970g of electrolyte Li6PS5Cl, 30g of PAA-GLY, and 818.18g of ethyl acetate (solid content 55%). Stir at 50rpm for 20min and disperse at 3000rpm for 40min. Then, add p-toluenesulfonic acid under stirring at 30rpm to adjust the zeta potential to 35mV to complete the slurry preparation. Step 2, Preparation of active material slurry: Weigh 2850g of graphite, 90g of PAA-GLY, 60g of conductive agent VGCF, and 1615.38g of ethyl acetate (solid content 65%). Stir at 50rpm for 0.5h and disperse at 2000rpm for 1.5h. Then, add triethylamine under stirring at 30rpm to adjust the zeta potential to -35mV to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 40 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a rate of 50 mL / min, and then stir at 60 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0024] Example 2 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh 970g of electrolyte Li6PS5Cl, 30g of PVBST block copolymer, and 818.18g of butyl butyrate (solid content 55%). Stir at 50rpm for 20min and disperse at 3000rpm for 40min. Add camphor sulfonic acid under stirring at 40rpm to adjust the zeta potential to 25mV to complete the slurry preparation. Step 2, Preparation of active material slurry: Weigh 2910g of graphite, 60g of PAA-GLY, 30g of conductive agent CNTs, and 1615.38g of butyl butyrate (solid content 65%). Stir at 50rpm for 0.5h and disperse at 2000rpm for 1.5h. Then, add diisopropylethylamine under stirring at 50rpm to adjust the zeta potential to -25mV to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 40 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a speed of 80 mL / min, and then stir at 50 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0025] Example 3 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh 970g of electrolyte Li6PS5Cl, 30g of PAA-GLY, and 818.18g of ethyl acetate (solid content 55%). Stir at 30rpm for 20min and disperse at 4000rpm for 40min. Then, add trifluoroacetic acid under stirring at 30rpm to adjust the zeta potential to 10mV to complete the slurry preparation. Step 2, Preparation of active material slurry: Weigh 2850g of graphite, 90g of PAA-GLY, 60g of conductive agent VGCF, and 1615.38g of ethyl acetate (solid content 65%). Stir at 60rpm for 0.5h and disperse at 2500rpm for 1.5h. Then, add triethylamine under stirring at 30rpm to adjust the zeta potential to -10mV to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 40 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a speed of 60 mL / min, and then stir at 60 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0026] Example 4 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh 423.53g of electrolyte Li6PS5Cl, 35.29g of PAA-GLY, and 332.25g of ethyl acetate (solid content 58%). Stir at 50rpm for 20min and disperse at 3000rpm for 40min. Then, add p-toluenesulfonic acid under stirring at 30rpm to adjust the zeta potential to 30mV to complete the slurry preparation. Step 2, Preparation of active material slurry: Weigh 3000g of NCM811, 35.29g of PAA-GLY, 35.29g of conductive agent VGCF, and 1653.39g of ethyl acetate (solid content 65%). Stir at 50rpm for 0.5h and disperse at 2000rpm for 1.5h. Then, add triethylamine under stirring at 30rpm to adjust the zeta potential to -30mV to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 30 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a rate of 100 mL / min, and then stir at 60 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0027] Example 5 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh the electrolyte Li 1.3 Al 0.3 Ti 1.7 (PO4) 3800g, PAA-GLY 40g, ethyl acetate 608.27g (solid content 58%), stirred at 70rpm for 60min, dispersed at 3500rpm for 60min, and then p-toluenesulfonic acid was added under stirring at 30rpm to adjust the zeta potential to 25mV to complete the slurry preparation; Step 2, Preparation of active material slurry: Weigh 3000g of NCM811, 40g of PAA-GLY, 120g of conductive agent VGCF, and 1701.53g of ethyl acetate (solid content 65%). Stir at 50rpm for 0.5h and disperse at 3000rpm for 1.5h. Then, add triethylamine under stirring at 30rpm to adjust the zeta potential to -25mV to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 30 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a speed of 80 mL / min, and then stir at 60 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0028] Comparative Example 1 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh 970g of electrolyte Li6PS5Cl, 30g of PAA-GLY, and 818.18g of ethyl acetate (solid content 55%). Stir at 50rpm for 20min and disperse at 3000rpm for 40min to complete the preparation of the slurry. Step 2, Preparation of active material slurry: Weigh 2850g of graphite, 90g of PAA-GLY, 60g of conductive agent VGCF, and 1615.38g of ethyl acetate (solid content 65%). Stir at 50rpm for 0.5h and disperse at 2000rpm for 1.5h to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 40 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a rate of 50 mL / min, and then stir at 60 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0029] Comparative Example 2 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh 970g of electrolyte Li6PS5Cl, 30g of polyimide, and 818.18g of ethyl acetate (solid content 55%). Stir at 50rpm for 20min and disperse at 3000rpm for 40min. Then, add the same amount of p-toluenesulfonic acid as in Example 1 under stirring at 30rpm to complete the preparation of the slurry. Step 2, Preparation of active material slurry: Weigh 2850g of graphite, 90g of polyimide, 60g of conductive agent VGCF, and 1615.38g of ethyl acetate (solid content 65%). Stir at 50rpm for 0.5h and disperse at 2000rpm for 1.5h. Then, add the same amount of triethylamine as in Example 1 under stirring at 30rpm to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 40 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a rate of 50 mL / min, and then stir at 60 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0030] Comparative Example 3 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh 970g of electrolyte Li6PS5Cl, 30g of PAA-GLY, and 818.18g of ethyl acetate (solid content 55%). Stir at 50rpm for 20min and disperse at 3000rpm for 40min. Then, add p-toluenesulfonic acid under stirring at 30rpm to adjust the zeta potential to 5mV to complete the slurry preparation. Step 2, Preparation of active material slurry: Weigh 2850g of graphite, 90g of PAA-GLY, 60g of conductive agent VGCF, and 1615.38g of ethyl acetate (solid content 65%). Stir at 50rpm for 0.5h and disperse at 2000rpm for 1.5h. Then, add triethylamine under stirring at 30rpm to adjust the zeta potential to -5mV to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 40 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a rate of 50 mL / min, and then stir at 60 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0031] Comparative Example 4 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh 423.53g of electrolyte Li6PS5Cl, 35.29g of PAA-GLY, and 332.25g of ethyl acetate (solid content 58%). Stir at 50rpm for 20min and disperse at 3000rpm for 40min to complete the preparation of the slurry. Step 2, Preparation of active material slurry: Weigh 3000g of NCM811, 35.29g of PAA-GLY, 35.29g of conductive agent VGCF, and 1653.39g of ethyl acetate (solid content 65%). Stir at 50rpm for 0.5h and disperse at 2000rpm for 1.5h to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 30 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a rate of 100 mL / min, and then stir at 60 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0032] Comparative Example 5 A method for preparing a solid-state battery electrode slurry includes the following steps: Step 1: Preparation of electrolyte slurry: Weigh the electrolyte Li 1.3 Al 0.3 Ti 1.7 (PO4) 3800g, PAA-GLY 40g, ethyl acetate 608.27g (solid content 58%), stirred at 70rpm for 60min, dispersed at 3500rpm for 60min, and then p-toluenesulfonic acid was added under stirring at 30rpm to adjust the zeta potential to 25mV to complete the slurry preparation; Step 2, Preparation of active material slurry: Weigh 3000g of NCM811, 40g of PAA-GLY, 120g of conductive agent VGCF, and 1701.53g of ethyl acetate (solid content 65%). Stir at 50rpm for 0.5h and disperse at 3000rpm for 1.5h. Then, add triethylamine under stirring at 30rpm to adjust the zeta potential to -10mV to complete the slurry preparation. Step 3: Preparation of electrode slurry: While stirring the active material slurry at 30 rpm, add the well-dispersed electrolyte slurry to the active material slurry at a speed of 80 mL / min, and then stir at 60 rpm for 1 hour to obtain the solid-state battery electrode slurry.

[0033] Performance testing, mold assembly, and electrical performance testing methods were performed on the electrode slurries prepared in the examples and comparative examples: Solid-state battery electrode slurries prepared in the examples and comparative examples were coated onto copper foil to prepare solid-state battery electrode sheets, which were then cut into small circular pieces with a diameter of 10 mm. 85 mg of LPSC651 was weighed and poured into a mold inside a glove box, and pressed twice under a pressure of 300 MPa to obtain an LPSC651 layer. An electrode sheet was then added to one side of the LPSC651 layer, and the pressing was repeated twice under the same conditions. A 10 mm diameter In sheet and an 8 mm diameter lithium sheet were then added to the other side of the LPSC651 layer, sealed, and the mold frame was tightened using a torque wrench to obtain a mold battery. The assembled mold battery was placed in a 45°C constant temperature chamber and allowed to stand for 12 hours. Then, the negative electrode underwent 0.05C and 1C charge-discharge tests within a voltage range of -0.59V to 0.9V.

[0034] The results are shown in Table 1. Figure 1 , Figure 2 As shown, by adding an ionizable binder during the homogenization process and adjusting the pH to ensure that the electrolyte and active material carry the same charge, the principle of electrostatic repulsion can effectively prevent agglomeration. Furthermore, when the two slurries are mixed, the attraction between opposite charges allows the electrolyte to be uniformly coated onto the surface of the active material, significantly improving the rate performance of the electrode. The specific capacity and rate performance of the example are superior to those of the comparative example. The electrode slurry of Example 1 is uniformly dispersed and free of agglomeration. Figure 1 Comparative Example 1, although it contained an ionizable binder, did not adjust the pH of the slurry, and the slurry still contained a large number of agglomerates after mixing. Figure 2 Comparative Example 2 used a binder without ionizable groups. Although lipid-soluble acids and bases were added to adjust the pH, no charge was generated, and it did not inhibit slurry agglomeration. Comparative Example 3 had a |Zeta potential| of 5mV, which had a certain effect on inhibiting slurry agglomeration. Its electrochemical performance was better than that of Comparative Examples 1 and 2, but lower than that of Example 4. Although Comparative Example 4 added an ionizable binder, it did not adjust the pH of the slurry, and its electrochemical performance was not as good as that of Example 4. The comparison between Comparative Example 5 and Example 5 shows that the absolute values ​​of the Zeta potentials of the active material slurry and the electrolyte slurry must be equal to achieve the effect of uniformly coating the electrolyte on the material. If they are not equal, the two materials will not be able to mix uniformly, affecting the electrochemical performance.

[0035] Table 1 Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A method for preparing a solid-state battery electrode slurry, characterized in that, Includes the following steps: Step 1: Preparation of electrolyte slurry: Mix electrolyte, first binder and solvent, stir and disperse, add fat-soluble acid or fat-soluble base to adjust pH so that the absolute value of the zeta potential of electrolyte slurry is ≥10mV; Step 2, Preparation of active material slurry: Mix the active material, conductive agent, second binder and solvent, stir and disperse, add fat-soluble acid or fat-soluble base to adjust the pH, so that the active material slurry has the opposite charge of the electrolyte slurry, and the absolute value of the Zeta potential of the active material slurry and the electrolyte slurry are equal. Step 3: Electrode slurry preparation: Add the electrolyte slurry to the stirred active material slurry, mix and continue stirring to obtain the solid-state battery electrode slurry.

2. The method for preparing a solid-state battery electrode slurry as described in claim 1, characterized in that, In step one, the electrolyte is Li7P3S. 11 , Li4GeS4, Li2GeS5, Li6GeS5, Li6PS5Cl, Li 5.5 PS 4.5 C l1.5 Li6PS5Br, Li6PS5I, Li 11 Si2PS 12 Li 10 SnP2S 12 Li 10 GeP2S 12 Li 3.25 Ge 0.25 P 0.75 S4, Li 10 Ge(P 1-x Sb x )2S 12 Li 6.6 Ge 0.6 P 0.4 S5I, Li 1.3 Al 0.3 Ti 1.7 (PO4)3, Li 1.5 Al 0.5 Ge 1.5 One or more of (PO4)3.

3. The method for preparing a solid-state battery electrode slurry as described in claim 1, characterized in that, In step two, the active material is one or more of NCM811, NCM523, NCM622, LiFePO4, graphite, silicon, silicon carbide, and lithium titanate.

4. The method for preparing a solid-state battery electrode slurry as described in claim 1, characterized in that, In step two, the conductive agent is one or more of Super P, carbon nanotubes, and carbon fibers.

5. The method for preparing a solid-state battery electrode slurry as described in claim 1, characterized in that, The first adhesive and the second adhesive are one or more of the following: PVBST block copolymer, polyacrylic acid-glycerol crosslinked network, and dopamine-modified polyfluorene.

6. The method for preparing a solid-state battery electrode slurry as described in claim 1, characterized in that, The solvent is one of cyclopentyl methyl ether, anisole, dibutyl ether, ethyl acetate, n-decane, butyl butyrate, toluene, xylene, and isobutyl isobutyrate.

7. The method for preparing a solid-state battery electrode slurry as described in claim 1, characterized in that, The lipid-soluble acid is one or more of p-toluenesulfonic acid, trifluoroacetic acid, camphorsulfonic acid, and boron trifluoride complex; the lipid-soluble base is one or more of triethylamine, diisopropylethylamine, 1,8-diazabicycloundec-7-ene, and potassium tert-butoxide.

8. The method for preparing a solid-state battery electrode slurry as described in claim 1, characterized in that, In step one, the solid content of the electrolyte slurry is 40%~80%; the mass ratio of electrolyte to first binder is (80~99):(1~10); the stirring and dispersing speed is 10~4000 rpm, and the time is 0.5~2 hours.

9. The method for preparing a solid-state battery electrode slurry as described in claim 1, characterized in that, In step two, the solid content of the active material slurry is 30%~70%; the mass ratio of the active material, conductive agent and second binder is (80~99):(0.5~10):(0.5~10); the stirring and dispersing speed is 10~4000 rpm and the time is 1~3 hours.

10. The method for preparing a solid-state battery electrode slurry as described in claim 1, characterized in that, In step three, the mass ratio of electrolyte in the electrolyte slurry to active material in the active material slurry is 1:(1.5~7.5); the electrolyte slurry is added at a rate of 30~100mL / min; the stirring speed is 10~150rpm; and stirring continues for 0.5~12 hours after mixing.

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