Preparation method of LMPSC sulfide solid electrolyte, LMPSC sulfide solid electrolyte and application thereof
By introducing metal elements into the sulfide solid electrolyte for doping and calcination, the problem of uneven distribution of Fe3+ and Fe2+ was solved, and a high-capacity and high-ionic-conductivity LMPSC sulfide solid electrolyte was prepared, which is suitable for electric vehicles.
Patent Information
- Application Number
- CN202511413412.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2025-12-23
Smart Images
Figure CN121192240A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of all-solid-state battery technology, specifically relating to the preparation method of LMPSC sulfide solid electrolyte, LMPSC sulfide solid electrolyte and its applications. Background Technology
[0002] In the field of solid-state batteries, an electrolyte material that provides both capacity and ionic conductivity, similar to a cathode, is just beginning to be researched in academia. This material can provide both capacity and Li₂ (Li₂) transport. + Currently, the only publicly disclosed integrated electrolyte materials are LFC halogen materials; there are no reports on sulfide materials. For example, Fu et al., in their article "A cost-effective all-in-one halide material for all-solid-state batteries" published in *Nature*, reported the development of another Li-based integrated electrolyte material. 1.3 Fe 1.2 The electrolyte material of Cl4 can provide both capacity and Li-transfer capacity. + Li 1.3 Fe 1.2 Cl4 materials have advantages such as low cost and simple processing, but their disadvantages still exist, such as in the preparation of Li. 1.3 Fe 1.2 When Cl4 is an electrolyte, Fe 3+ and Fe 2+ The polarization phenomenon caused by the non-uniform distribution in the LFC unit cell can deteriorate electrochemical behavior to some extent, resulting in a plateau in the charge-discharge curve. Furthermore, its low cycling performance under low current cycling conditions (0.1C) still restricts its commercial application. Meanwhile, in the synthesis of Li... 1.3 Fe 1.2 Cl4 material contains Fe 3+ and Fe 2+ The uneven distribution of Li is unavoidable. Currently, in the field of sulfide solid electrolytes, no solution has been disclosed that can provide both capacity and Li transport. + Preparation of special electrolytes. Summary of the Invention
[0003] The first objective of this invention is to provide a method for preparing an LMPSC sulfide solid electrolyte that is simple and easy to operate, and can yield an electrolyte that provides both capacity and Li-transfer capability. + LMPSC sulfide solid electrolyte.
[0004] A second objective of the present invention is to provide an LMPSC sulfide solid electrolyte prepared according to the aforementioned method.
[0005] A third object of the present application is to provide an application of the aforementioned LMPSC sulfide solid electrolyte in a power automobile.
[0006] To achieve the first object of the present application, the following technical solution is adopted: A method for preparing an LMPSC sulfide solid electrolyte, comprising: adding an additive to a main raw material and performing calcination treatment to dope metal elements, to obtain the LMPSC sulfide solid electrolyte; wherein, the main raw material comprises diphosphorus pentasulfide, lithium sulfide and lithium chloride; the additive is a metal chloride.
[0007] Preferably, in the method for preparing the LMPSC sulfide solid electrolyte, the amount ratio of diphosphorus pentasulfide, lithium sulfide and lithium chloride in the main raw material is 1: (3-5.5): (1.5-4) in terms of molar ratio.
[0008] Preferably, in the method for preparing the LMPSC sulfide solid electrolyte, the amount ratio of the main raw material to the additive is 1: (3-7) in terms of molar ratio of diphosphorus pentasulfide to metal chloride.
[0009] Preferably, in the method for preparing the LMPSC sulfide solid electrolyte, the metal chloride comprises any one or a combination of multiple items of ferrous chloride, cobalt chloride and nickel chloride.
[0010] Preferably, in the method for preparing the LMPSC sulfide solid electrolyte, the calcination temperature is (400-500) ℃, and / or the heating rate is (1.5-3) ℃ / min, and / or the calcination time is (2-6) h.
[0011] Preferably, in the method for preparing the LMPSC sulfide solid electrolyte, the method specifically comprises: a. proportionally performing liquid-phase star milling on the main raw material and the additive; b. sequentially performing washing, filtering and drying treatment on the material obtained in step a; c. performing calcination treatment on the material obtained in step b. Preferably, in the method for preparing the LMPSC sulfide solid electrolyte, the method further comprises grinding the material obtained in step c; preferably, the method comprises: d. performing liquid-phase primary grinding on the material obtained in step c; e. performing liquid-phase secondary grinding on the material obtained in step d, and sequentially performing filtering and drying on the obtained material to obtain the LMPSC sulfide solid electrolyte.
[0012] The method for preparing the LMPSC sulfide solid electrolyte of the present application, preferably, in step a, the liquid phase comprises a combination of any one or more of isopropyl ether, tetrahydrofuran, dimethyl carbonate, diethyl carbonate, propylene carbonate, dibutyl carbonate, dipropyl carbonate, butyl acetate, diphenyl carbonate, propyl propionate, ethyl propionate, isopropyl alcohol, ethyl acetate and octamethylcyclotetrasiloxane.
[0013] The method for preparing the LMPSC sulfide solid electrolyte of the present application, preferably, in step d, the grinding is terminated when D50≤4 μm.
[0014] The method for preparing the LMPSC sulfide solid electrolyte of the present application, preferably, in step e, the grinding is terminated when D50≤2 μm.
[0015] To achieve the second object, the present application further provides the LMPSC sulfide solid electrolyte prepared according to the aforementioned method.
[0016] To achieve the third object, the present application further provides the aforementioned LMPSC sulfide solid electrolyte for use in a power automobile.
[0017] The present application has the following beneficial effects: The method for preparing the LMPSC sulfide solid electrolyte of the present application introduces metal elements, guarantees the redox properties of electron gain and loss, regulates the electron cloud distribution in the LPSC, increases the steady state of the LMPSC sulfide solid electrolyte, and avoids serious side reactions. At the same time, the particularity of the LPSC sulfide cell size still makes the obtained LMPSC sulfide solid electrolyte have high ionic conductivity. That is, the obtained LMPSC sulfide solid electrolyte can not only provide capacity but also transmit Li + . BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is the SEM image of the LMPSC sulfide solid electrolyte A1 obtained in Example 1 of the present application.
[0019] Figure 2 is the SEM image of the LMPSC sulfide solid electrolyte A9 obtained in Example 9 of the present application. DETAILED DESCRIPTION
[0020] The technical solutions of the present application and their effects will be further described below in combination with specific embodiments / examples. The following embodiments / examples are only used to illustrate the content of the present application, and the present application is not limited to the following embodiments or examples. Simple changes made by applying the concept of the present application to the present application are within the scope of the present application.
[0021] The present application provides a method for preparing a LMPSC sulfide solid electrolyte, comprising: The main raw material is added with an additive and calcination treatment is performed for metal element doping to obtain the LMPSC sulfide solid electrolyte. The main raw material includes diphosphorus pentasulfide, lithium sulfide and lithium chloride. The additive is a metal chloride (abbreviated as MCl).
[0022] The preparation method of the LMPSC sulfide solid electrolyte of the present application introduces metal elements, guarantees the oxidation-reduction properties of electron gain and loss, controls the electron cloud distribution in the LPSC, increases the steady state of the obtained LMPSC sulfide solid electrolyte, and avoids serious side reactions. At the same time, the particularity of the LPSC sulfide cell size still makes the obtained LMPSC sulfide solid electrolyte have high ionic conductivity. That is, the obtained LMPSC sulfide solid electrolyte can provide capacity and transmit Li + .
[0023] In an embodiment, the amount ratio of diphosphorus pentasulfide, lithium sulfide and lithium chloride in the main raw material is 1: (3-5.5, such as 3, 3.8, 4.5, 5.0 and 5.5 and any value and value range within the range) : (1.5-4, such as 1.5, 2.2, 3.2 and 4 and any value and value range within the range) in terms of molar ratio, so as to adjust the proportion of P element in the obtained LMPSC sulfide solid electrolyte, and further improve the capacity and conductivity of the obtained LMPSC sulfide solid electrolyte.
[0024] In an embodiment, the amount ratio of the main raw material to the additive is 1: (3-7) in terms of the molar ratio of diphosphorus pentasulfide to metal chloride, such as 1:3, 1:4, 1:5, 1:6 and 1:7 and any value and value range within the range, so as to adjust the proportion of P element and metal element in the obtained LMPSC sulfide solid electrolyte, and further improve the capacity and conductivity of the obtained LMPSC sulfide solid electrolyte.
[0025] In an embodiment, the metal chloride includes any one or a combination of ferrous chloride, cobalt chloride and nickel chloride.
[0026] In an embodiment, the calcination temperature is (400-500) ℃, such as 400 ℃, 450 ℃ and 500 ℃ and any value and value range within the range; and / or the heating rate is (1.5-3) ℃ / min, such as 1.5 ℃ / min, 2 ℃ / min, 2.5 ℃ / min and 3 ℃ / min and any value and value range within the range; and / or the calcination time is (2-6) h, such as 2 h, 4 h and 6 h and any value and value range within the range.
[0027] The application helps to improve the capacity and conductivity of the obtained LMPSC sulfide solid electrolyte by further setting the calcination conditions.
[0028] In an embodiment, the calcination treatment is carried out under an inert protective atmosphere, such as nitrogen.
[0029] In an embodiment, the preparation method specifically comprises: a. liquid-phase star milling the main raw material and the additive according to a proportion; b. sequentially washing, filtering and drying the material obtained in step a; c. calcining the material obtained in step b.
[0030] In an embodiment, preferably, the preparation method further comprises grinding the material obtained in step c; preferably, comprising: d. primary liquid-phase grinding the material obtained in step c; e. secondary liquid-phase grinding the material obtained in step d, and sequentially filtering and drying the obtained material to obtain the LMPSC sulfide solid electrolyte.
[0031] In an embodiment, in step a, the liquid phase comprises a combination of any one or more of isopropyl ether, tetrahydrofuran, dimethyl carbonate, diethyl carbonate, propylene carbonate, dibutyl carbonate, dipropyl carbonate, butyl acetate, diphenyl carbonate, propyl propionate, ethyl propionate, isopropyl alcohol, ethyl acetate and octamethylcyclotetrasiloxane.
[0032] In an embodiment, in step d, the grinding is terminated when D50≤4 μm; preferably, the grinding time is (1-2) h, such as 1 h, 1.5 h and 2 h and any value and value range within the range.
[0033] In an embodiment, in step e, the grinding is terminated when D50≤2 μm; preferably, the grinding time is (2-3) h, such as 2 h, 2.5 h and 3 h and any value and value range within the range.
[0034] In the application, washing, filtering and drying are common means in the art, which will not be described here.
[0035] The preparation method of the LMPSC sulfide solid electrolyte in the application introduces metal elements, guarantees the oxidation-reduction properties of electron gain and loss, regulates the electron cloud distribution in the LPSC, increases the steady state of the LMPSC sulfide solid electrolyte and avoids serious side reactions. At the same time, the particularity of the LPSC sulfide cell size still makes the obtained LMPSC sulfide solid electrolyte have high ionic conductivity. That is, the obtained LMPSC sulfide solid electrolyte can provide capacity and transmit Li+ .
[0036] The application ingeniously introduces the metal M (M is taken from one or more of Ni 2+ , Fe 2+ , Co 2+ elements) which can provide redox into the interior of the LPSC crystal to prepare the LMPSC sulfide solid electrolyte. When the LMPSC sulfide solid electrolyte is prepared into a battery for testing its performance, the incorporation of the conductive agent VGCF can make the preparation product LMPSC (LMPSC sulfide solid electrolyte) have a certain capacity release in the voltage window of 1.9-3.7 V and have the positive electrode property. Based on the LPSC crystal structure, the preparation product LMPSC (LMPSC sulfide solid electrolyte) has a certain ionic conductivity, reaching 3-5 mS / cm. Meanwhile, the introduction of the metal M adjusts the arrangement of the electron cloud in the LPSC cell, so that the electron cloud of the LPSC is transformed from the original "concentrated" distribution to the uniform distribution in the LMPSC (LMPSC sulfide solid electrolyte). The rearrangement of the electron cloud increases the stability of the synthesis product LMPSC (LMPSC sulfide solid electrolyte), that is, the increase of the air stability and the reduction of the side reaction. In summary, the design of the integrated product LMPSC endows the sulfide electrolyte with certain unique properties, which increases the reserves for the design of new electrolyte materials.
[0037] The application also provides the LMPSC sulfide solid electrolyte prepared according to the aforementioned preparation method.
[0038] The application also provides the application of the aforementioned LMPSC sulfide solid electrolyte in a power automobile.
[0039] The LMPSC sulfide solid electrolyte obtained by the application can not only provide capacity but also transmit Li + , has high capacity and ionic conductivity.
[0040] The application is further illustrated below through specific examples and comparative examples.
[0041] The raw materials used in the following examples and comparative examples are as follows: The raw materials used are all analytical pure, and the manufacturer is Macklin, unless otherwise specified.
[0042] The test method is as follows.
[0043] 1. Ion conductivity characterization A sample of 0.2 g of the LMPSC sulfide solid electrolyte obtained in the application was placed in a battery die for cold pressing to obtain an electrolyte sheet, wherein the pressure applied during the cold pressing process was maintained at 350 MPa; an ion blocking battery was assembled in the order of a stainless steel sheet, the electrolyte sheet, and a stainless steel sheet; the ion conductivity of the LMPSC sulfide solid electrolyte sample used was evaluated by testing the electrochemical impedance spectrum of the ion blocking battery obtained. The calculation formula of the ion conductivity is as follows: ; wherein, σ represents the ion conductivity of the LMPSC sulfide solid electrolyte sample used, L is the thickness of the electrolyte sheet, S is the surface area of the electrolyte sheet, and R is the resistance of the electrolyte sheet.
[0044] 2. Electrochemical performance test A solid-state mold battery was assembled using the LMPSC sulfide solid electrolyte sample obtained in the application according to the following contents; the details are as follows: 100 mg of Li3YCl6 was weighed and placed in the mold for 150 MPa pressure treatment (electrolyte film); then, 100 mg of the LMPSC sulfide solid electrolyte sample and 10 mg of the conductive agent VGCF were mixed and then placed in the mold for 150 MPa pressure treatment (positive electrode); the negative electrode was a lithium-indium alloy; the positive electrode, the electrolyte film, and the negative electrode were assembled and then placed under an operating pressure of 200 MPa for electrochemical testing.
[0045] Example 1 (S1) LMPSC sulfide solid electrolyte A1 was prepared according to the preparation method of the LMPSC sulfide solid electrolyte in the application; the preparation method comprises: a. Liquid phase star milling of the main raw materials and the additives in a proportion; wherein, The main raw materials include phosphorus pentasulfide, lithium sulfide, and lithium chloride; The amount ratio of phosphorus pentasulfide, lithium sulfide, and lithium chloride in the main raw materials is 1:5:2 according to the molar ratio; The additive is a metal chloride; the metal chloride is ferrous chloride; The amount ratio of the main raw materials and the additive is 1:3 according to the molar ratio of phosphorus pentasulfide and the metal chloride; The liquid phase is ethyl acetate; b. The material obtained in step a is sequentially washed, filtered, and dried; c. The material obtained in step b is calcined under an inert protective atmosphere; wherein, The inert protective gas is nitrogen; The calcination temperature is 400 ℃, the heating rate is 2 ℃ / min, and the calcination time is 4 h; d. The material obtained in step c is subjected to liquid phase primary grinding, and the grinding is terminated when D50≤4 μm; wherein, The size of Zr balls used for grinding is 3 mm; e. The material obtained in step d is subjected to liquid phase secondary grinding, and the grinding is terminated when D50≤2 μm; wherein, the size of Zr balls used for grinding is 2 mm; the obtained material is subjected to filtration and drying in sequence to obtain LMPSC sulfide solid-state electrolyte A1.
[0046] The SEM image of the obtained LMPSC sulfide solid-state electrolyte A1 is shown in Figure 1 .
[0047] Example 2 (S2) LMPSC sulfide solid-state electrolyte A2 is prepared according to the preparation method of Example 1; the only difference between A2 and Example 1 is that: In step a, the additive is a metal chloride; the metal chloride is cobalt chloride; In step a, the ratio of the amount of use of the main raw material to the additive is 1:4 according to the molar ratio of diphosphorus pentasulfide to the metal chloride; In step c, the calcination temperature is 440 ℃.
[0048] Example 3 (S3) LMPSC sulfide solid-state electrolyte A3 is prepared according to the preparation method of Example 1; the only difference between A3 and Example 1 is that: In step a, the additive is a metal chloride; the metal chloride is nickel chloride; In step a, the ratio of the amount of use of the main raw material to the additive is 1:5 according to the molar ratio of diphosphorus pentasulfide to the metal chloride; In step c, the calcination temperature is 470 ℃.
[0049] Example 4 (S4) LMPSC sulfide solid-state electrolyte A4 is prepared according to the preparation method of Example 1; the only difference between A4 and Example 1 is that: In step a, the additive is a metal chloride; the metal chloride includes ferrous chloride and cobalt chloride, and the mass ratio of ferrous chloride to cobalt chloride is 1:1; In step a, the ratio of the amount of use of the main raw material to the additive is 1:6 according to the molar ratio of diphosphorus pentasulfide to the metal chloride; In step c, the calcination temperature is 500 ℃.
[0050] Example 5 (S5) LMPSC sulfide solid-state electrolyte A5 is prepared according to the preparation method of Example 1; the only difference between A5 and Example 1 is that: In step a, the additive is a metal chloride; the metal chloride includes cobalt chloride and nickel chloride, and the mass ratio of cobalt chloride to nickel chloride is 1:1; In step a, the dosage ratio of the main raw material to the additive is 1:7 in terms of the molar ratio of phosphorus pentasulfide to metal chloride; In step c, the calcination temperature is 450°C.
[0051] Example 6 (S6) LMPSC sulfide solid electrolyte A6 was prepared according to the preparation method of Example 1; the only difference between A6 and Example 1 is that: In step a, the additive is a metal chloride; the metal chloride includes ferrous chloride, cobalt chloride and nickel chloride, and the mass ratio of ferrous chloride, cobalt chloride and nickel chloride is 1:1:1; In step a, the dosage ratio of the main raw material to the additive is 1:5 in terms of the molar ratio of phosphorus pentasulfide to metal chloride; In step c, the calcination temperature is 500°C.
[0052] Example 7 (S7) LMPSC sulfide solid electrolyte A7 was prepared according to the preparation method of Example 1; the only difference between A7 and Example 1 is that: In step a, the dosage ratio of the main raw material to the additive is 1:5 in terms of the molar ratio of phosphorus pentasulfide to metal chloride.
[0053] Example 8 (S8) LMPSC sulfide solid electrolyte A8 was prepared according to the preparation method of Example 1; the only difference between A8 and Example 1 is that: The additive is a metal chloride; the metal chloride is cobalt chloride; The dosage ratio of the main raw material to the additive is 1:4 in terms of the molar ratio of phosphorus pentasulfide to metal chloride; In step c, the calcination temperature is 500°C.
[0054] Example 9 (S9) LMPSC sulfide solid electrolyte A9 was prepared according to the preparation method of Example 1; the only difference between A9 and Example 1 is that: In step a, the additive is a metal chloride; the metal chloride includes ferrous chloride and nickel chloride, and the mass ratio of ferrous chloride to nickel chloride is 1:1; In step a, the dosage ratio of the main raw material to the additive is 1:5 in terms of the molar ratio of phosphorus pentasulfide to metal chloride; In step c, the calcination temperature is 470°C.
[0055] Example 10 (S10) LMPSC sulfide solid electrolyte A10 was prepared according to the preparation method of Example 1; the only difference between Example 1 and Example 10 is that: In step a, the additive is a metal chloride; the metal chloride includes ferrous chloride, cobalt chloride and nickel chloride, and the mass ratio of ferrous chloride, cobalt chloride and nickel chloride is 1:2:5; In step a, the amount ratio of the main raw material to the additive is 1:5 according to the molar ratio of phosphorus pentasulfide to metal chloride; In step c, the calcination temperature is 500 ℃.
[0056] Example 11 (S11) LMPSC sulfide solid electrolyte A11 was prepared according to the preparation method of Example 1; the only difference between Example 1 and Example 11 is that: In step a, in the main raw material, the amount ratio of phosphorus pentasulfide, lithium sulfide and lithium chloride is 1:3:4 according to the molar ratio; In step a, the additive is a metal chloride; the metal chloride includes ferrous chloride, cobalt chloride and nickel chloride, and the mass ratio of ferrous chloride, cobalt chloride and nickel chloride is 1:2:1.
[0057] Example 12 (S12) LMPSC sulfide solid electrolyte A12 was prepared according to the preparation method of Example 1; the only difference between Example 1 and Example 12 is that: In step a, in the main raw material, the amount ratio of phosphorus pentasulfide, lithium sulfide and lithium chloride is 1:5.5:1.5 according to the molar ratio; In step a, the additive is a metal chloride; the metal chloride includes ferrous chloride and nickel chloride, and the mass ratio of ferrous chloride and nickel chloride is 3:1.
[0058] Comparative Example 1 (D1) LMPSC sulfide solid electrolyte A1' was prepared according to the preparation method of Example 1; the only difference between Example 1 and Example 1' is that: In step a, no additive is added, and only the main raw material is subjected to liquid-phase star-type ball milling.
[0059] According to the above ion conductivity characterization method and electrochemical test method, the ion conductivity and electrochemical performance of the LMPSC sulfide solid electrolytes A1-12 and A1'- obtained in Examples 1-12 and Comparative Example 1 were tested, and the results are shown in Table 1.
[0060] Table 1 Related performance test results of LMPSC sulfide solid electrolytes A1-11 and A1'-3'
[0061] According to the comparison of examples 1-12 and comparative example 1 and table 1, it can be seen that the method of the present application can obtain LMPSC sulfide solid electrolyte with high capacity, high ionic conductivity and excellent electrochemical performance by setting the doping process.
[0062] According to the data in comparative example 1 and table 1, it can be seen that no metal element is added in comparative example 1, which cannot release capacity, indicating that the metal participating in redox has a decisive effect on capacity or rate.
[0063] According to the comparison of example 1 and example 7, it can be seen that when other conditions remain unchanged, only the amount of metal element is changed, with the increase of the amount of metal element, the ionic conductivity decreases, and the ionic conductivity retention rate increases, which shows that the introduction of metal adjusts the electron cloud distribution in the LPSC unit cell, and changes from concentrated distribution to uniform distribution; at the same time, with the increase of the amount of metal element, the electrochemical charge and discharge capacity increases, which shows that the content of metal participating in redox has a decisive effect on capacity or rate.
[0064] According to the comparison of example 8 and example 2 and the data in table 1, it can be seen that under the condition that other conditions remain unchanged, only the calcination temperature is increased, which can increase the electrochemical charge and discharge capacity, which may be due to the improvement of material crystallinity.
[0065] According to the comparison of example 9 and example 3 and the data in table 1, it can be seen that under the condition that other conditions remain unchanged, a kind of metal element (iron) is introduced on the basis of the original metal element (nickel), and the 0.1 C discharge capacity changes from 137.7 mAh / g to 130.6 mAh / g, which shows that different metals have different contribution ability to rate, and the contribution of iron element to rate is not as good as that of nickel element.
[0066] As can be seen from the above examples and comparative examples, whether the metal M is added or not determines whether it can be discharged, the increase of the content of metal M can effectively improve the charge and discharge capacity, different metals have different contribution ability to rate or capacity, and the content of metal also affects the ionic conductivity retention rate. The present application realizes the supply of capacity by introducing Ni 2+ , Fe 2+ , Co 2+ in the LPSC unit cell, and obtains an LMPSC sulfide solid electrolyte which can provide ionic conductivity and rate.
[0067] Although the content of the present application has been described in detail, it should be recognized that the above description should not be considered as a limitation of the present application. Those skilled in the art can understand that some modifications and adjustments can be made to the present application under the teaching of the present specification. These modifications and adjustments should also be within the scope defined by the claims of the present application.
Claims
1. A method for preparing an LMPSC sulfide solid electrolyte, characterized in that, The manufacturing method includes: Additives are added to the main raw material and calcined to dope metal elements, resulting in LMPSC sulfide solid electrolyte; among which, The main raw materials include phosphorus pentasulfide, lithium sulfide, and lithium chloride; The additive is a metal chloride.
2. The manufacturing method according to claim 1, characterized in that, In the main raw materials, the molar ratio of phosphorus pentasulfide, lithium sulfide and lithium chloride is 1:(3-5.5):(1.5-4).
3. The manufacturing method according to claim 1 or 2, characterized in that, The ratio of main raw materials to additives is 1:(3-7) based on the molar ratio of phosphorus pentasulfide to metal chloride.
4. The manufacturing method according to any one of claims 1-3, characterized in that, The metal chloride includes any one or a combination of ferrous chloride, cobalt chloride, and nickel chloride.
5. The manufacturing method according to any one of claims 1-4, characterized in that, The calcination temperature is (400-500)℃, and / or the heating rate is (1.5-3)℃ / min, and / or the calcination time is (2-6)h.
6. The manufacturing method according to any one of claims 1-5, characterized in that, The manufacturing method specifically includes: a. The main raw materials and additives are subjected to liquid-phase star ball milling in proportion; b. The material obtained in step a is washed, filtered and dried in sequence; c. Calcine the material obtained in step b. Preferably, the method further includes grinding the material obtained in step c; preferably, it includes: d. Perform liquid-phase primary grinding on the material obtained in step c; e. Perform liquid-phase two-stage grinding on the material obtained in step d, and then filter and dry the material to obtain LMPSC sulfide solid electrolyte.
7. The manufacturing method according to claim 6, characterized in that, In step a, the liquid phase includes any one or more of isopropyl ether, tetrahydrofuran, dimethyl carbonate, diethyl carbonate, propylene carbonate, dibutyl carbonate, dipropyl carbonate, butyl acetate, diphenyl carbonate, propyl propionate, ethyl propionate, isopropanol, ethyl acetate, and octamethylcyclotetrasiloxane.
8. The manufacturing method according to claim 6 or 7, characterized in that, In step d, grinding is terminated when D50 ≤ 4 μm; and / or, In step e, grinding is terminated when D50 ≤ 2 μm.
9. An LMPSC sulfide solid electrolyte prepared according to any one of claims 1-8.
10. The application of the LMPSC sulfide solid electrolyte according to claim 9 in a powered vehicle.