1781 results about "Sulfide compound" patented technology

The invention belongs to the technical field of petroleum processing, and particularly relates to a catalyst and a preparation method and application thereof. The raw materials of the catalyst comprise a metal active component, a carrier and an auxiliary agent, the metal active component is sulfides of Mo and Ni elements, the carrier is spherical gamma-Al2O3 of 0.5-1 mm, and the auxiliary agent is P; the carrier is modified by using the metal active component and the auxiliary agent to serve as the catalyst. The high-activity catalyst is synthesized by adopting the strategy of changing the roasting temperature, adding the additive for doping modification and changing the molar ratio of metal active components, the additive is combined with surface aluminum atoms, the framework strength is enhanced, pore channel collapse caused by acid / water erosion is reduced, the water resistance and acid resistance of the catalyst are improved, and the catalytic reaction activity is further improved. The catalyst disclosed by the invention is accurate and controllable in structure, can be synthesized in batches, and can be applied to the co-catalytic hydrogenation process of biomass pyrolytic oil and / or a model compound thereof and petroleum distillate oil and / or VR.

The invention discloses a composite sulfide solid-state electrolyte and a preparation method and application thereof, and relates to the technical field of solid-state batteries. The composite sulfide solid electrolyte comprises sulfide solid electrolyte particles and nano ion conductor particles which are stable to water vapor, wherein the nano ion conductor particles are uniformly distributed on the surfaces and gaps of the sulfide solid electrolyte particles to form a composite structure. Therefore, through the composite structure that the nano ion conductor particles are uniformly distributed on the surfaces of the sulfide particles and in the gaps, the surface coverage of the sulfide solid electrolyte can be increased, the hydrolysis reaction rate can be reduced, and the sulfide solid electrolyte is well protected while the reduction amplitude of the lithium ion conductivity is reduced; the stability to air is improved; and the electrochemical stability is also improved. In addition, the method is simple in process, has good mass production capacity, and has high application value for actual production.

The invention discloses a composite positive electrode, a preparation method thereof and an all-solid-state battery. The composite positive electrode comprises a composite solid electrolyte and a positive electrode active material. The composite solid electrolyte comprises a first solid electrolyte and a second solid electrolyte, wherein the molecular structural formula of the first solid electrolyte is Li < 2 + > (4-a) < x > Zr < 1-x > A < x > Cl < 6-by > By; the second solid electrolyte is selected from one or more of sulfide solid electrolytes; the selection of the metal element A and the non-metal element B meets the condition that XIC * x + (1-x) * 1.687 is less than 1.6; and [(6-by) * 3.16 + y * Xp] / [(6-by + y) * (XIC * x + (1-x) * 1.687)] > = 1.9; wherein the valence state of the metal element A is + a, and the valence state of the non-metal element B is-b; xIC represents the electronegativity of the metal element A, and Xp represents the electronegativity of the non-metal element B. According to the invention, the material forming the composite positive electrode is selected based on the electronegativity of the contained elements, so that the stability and the electrical performance are improved.

The invention discloses a preparation method of a solid-state electrolyte based on chemical bonding of a silane coupling agent and a sulfide solid-state electrolyte and a preparation method of a solid-state lithium battery. A halogen ion competitive adsorption effect of a first electrolyte is cooperated with a compact siloxane network formed by the silane coupling agent; the sulfide solid electrolyte is effectively inhibited from reacting with moisture in air, electrochemical performance attenuation is delayed, the first electrolyte reacts with lithium metal to generate a stable SEI layer to inhibit dendritic crystal growth, and a wide electrochemical stable window of the second electrolyte can reduce oxygenolysis reaction with a high-voltage positive electrode, so that the electrochemical performance is improved. Chemical bonding is formed between amino groups of the silane coupling agent and lithium metal, interface contact is optimized, meanwhile, the interface ion transfer efficiency is improved through the high ionic conductivity of the second electrolyte, and the interface impedance is reduced; the defects of poor ionic conductivity and poor service life caused by poor air stability and electrochemical stability of the electrolyte in the prior art are overcome.

The invention discloses a preparation method of a polymer-sulfide solid electrolyte based on multi-scale interface design and application of the polymer-sulfide solid electrolyte in an all-solid-state lithium battery, sulfide electrolyte particles with three complementary functions of Li10SiP2S12, Li7P2S8I and Li3PS4 are utilized, and a compact and ion transmission path optimized structure is formed in a polymer matrix through a gradient distribution technology; the micron-sized particles construct a high-speed ion conduction trunk, the nano and submicron particles are tightly filled to greatly reduce the interface impedance, meanwhile, the introduction of Li7P2S8I widens an electrochemical window from the source of the material, the self-repairing functional component on the outermost layer endows the interface with dynamic intelligent response capability, and when the interface generates microcracks, the self-repairing functional component on the outermost layer can repair the surface of the material. Dynamic bonds contained in the material can be reversibly broken and reconstructed, self-repairing of damage is achieved, the endurance capacity of an interface to mechanical and chemical strain caused by temperature change and long-term circulation is enhanced, and finally high ionic conductance, excellent interface stability and wide temperature range adaptive capacity are successfully and cooperatively achieved.

The invention discloses a sodium ion sulfide solid electrolyte with enhanced stability, the chemical composition formula of the solid electrolyte is Na3Sb1-xAsxS4-ySey, x and y are respectively molar ratios of As and Se, x is more than or equal to 0.1 and less than or equal to 0.5, y is more than or equal to 0.1 and less than or equal to 0.4, the solid electrolyte has a cubic phase crystal structure similar to Na3SbS4 and belongs to a space group, the side length of a cell is a = b = c = 7.19309, and the volume of the cell is V = 374.9457336; in the crystal structure, Sb and As are mixed to occupy the peak and center equivalent position 2a of a cubic unit cell; s and Se are mixed to occupy a 24g position, Na ions are filled in gaps of unit cells, Na1 occupies a 6b position, Na2 occupies a 2b position, and a covalent bond network is formed by the position occupied by the mixture of S and Se and the position occupied by the mixture of Sb and As. The solid electrolyte is low in cost, the ionic conductivity of the solid electrolyte is 10 <-3 > S / cm magnitude, and the solid electrolyte has excellent cycle performance and air stability.

The invention discloses a preparation method and application of a bimetallic sulfide / three-dimensional porous carbon catalyst, and relates to the technical field of electrolyzed water catalysts.The preparation method comprises the following steps that melamine sponge is cleaned, and the clean melamine sponge is obtained; the preparation method comprises the following steps: dissolving metal salt 1 and metal salt 2 in an ethanol aqueous solution, and adding alkali and an aniline monomer to obtain a precursor solution; completely soaking the clean melamine sponge in a precursor solution, carrying out constant-temperature hydrothermal reaction, and sequentially washing and drying to obtain the melamine sponge anchored with bimetal ions; introducing inert gas for protection, and performing high-temperature vulcanization treatment to obtain the three-dimensional porous carbon catalyst embedded with the bimetallic sulfide heterostructure. The catalyst comprises uniformly dispersed bimetallic sulfide nanoparticles and a spongy three-dimensional porous carbon carrier, shows excellent bifunctional catalytic activity and stability when being applied to an electro-catalytic water decomposition reaction, and has a wide application prospect.

The invention provides a solid-state electrolyte membrane, a solid-state battery and a preparation method of the solid-state electrolyte membrane, and belongs to the technical field of secondary batteries, the preparation method of the solid-state electrolyte membrane comprises the following steps: preparing a mixed solvent including a first solvent, a second solvent and a third solvent; mixing a sulfide electrolyte raw material and a binder into a mixed solvent according to a preset mass ratio to prepare precursor slurry; coating a base material with the precursor slurry to prepare a precursor membrane; heating and drying the precursor membrane at a first temperature, a second temperature and a third temperature in sequence to prepare a solid electrolyte membrane; the first temperature is 100-150 DEG C, the second temperature is 150-250 DEG C, and the third temperature is 200-350 DEG C. According to the preparation method, a gradient heating mode is adopted, synchronous proceeding of precursor slurry solvent segmented volatilization and sulfide electrolyte synthesis is achieved, synthesis of sulfide electrolyte and compact film forming of a solid electrolyte film body are completed under the low-temperature condition, and therefore the situation that sulfur in the film body volatilizes and the porosity of the film layer is reduced is avoided.

The invention discloses a preparation method and application of a metal sulfide adsorbent for adsorbing iodine and methyl iodide. The preparation method comprises the following steps: uniformly mixing an antimony source, a sulfur source, a deep eutectic solvent, polyamine and water to obtain a mixed solution; and transferring the mixed solution into a high-pressure reaction kettle, sealing, carrying out hydrothermal reaction at 110-220 DEG C for 2-9 days, cooling to room temperature to separate out crystals, and filtering, washing and drying to obtain the metal sulfide adsorbent. The invention also discloses application of the metal sulfide adsorbent in adsorption of iodine and methyl iodide. The metal sulfide adsorbent disclosed by the invention has a good adsorption effect on iodine and methyl iodide, and compared with an ethylenediamine-oriented metal sulfide adsorbent, the diethylenetriamine-oriented metal sulfide adsorbent has higher adsorption capacity on iodine and methyl iodide.

The invention discloses a preparation method of a manganese-doped iron-based sulfide / nitrogen-doped reduced graphene oxide composite electrode material for a sodium-ion battery, a simple solvothermal method is combined with annealing treatment, and iron atoms in a hexagonal system are replaced by part of manganese atoms in a hydrothermal process to form multivalent iron-based sulfide, so that the composite electrode material is prepared. The manganese-doped iron-based sulfide / nitrogen-doped reduced graphene oxide composite electrode material for the sodium-ion battery is successfully prepared by uniformly compounding the manganese-doped iron-based sulfide and the nitrogen-doped reduced graphene oxide, and the manganese-doped iron-based sulfide / nitrogen-doped reduced graphene oxide composite electrode material can effectively regulate and control the electronic state density, reduce the sodium ion migration energy barrier and promote the electron / ion transmission; meanwhile, continuous growth of iron-based sulfide particles is limited, so that the iron-based sulfide particles are uniformly dispersed on the surface of the graphene, more active sites are exposed, the electrochemical reaction activity is improved, and the structural stability is enhanced. The composite electrode material disclosed by the invention can be widely applied to a negative plate for a sodium-ion battery, and has excellent adaptability and application prospect in a wide temperature range and under a high-current working condition.

The invention belongs to the technical field of new energy materials and bioelectrochemistry, and particularly relates to an iron-based multi-metal sulfide composite carbon anode material and a preparation method of the iron-based multi-metal sulfide composite carbon anode material. The preparation method is simple in process flow, convenient to operate, easy for large-scale production, wide in raw material source, low in cost and environment-friendly, and can be used for preparing the three-dimensional porous carbon matrix which is formed by foaming and carbonizing polyvinylpyrrolidone and is provided with interconnected carbon nanosheets. Through reasonable composition design and structural regulation, and optimization of metal ratio and vulcanization conditions, accurate regulation of material performance can be realized, electrochemical performance and biocompatibility are significantly improved, electricity generation performance and operation stability of a microbial fuel cell are improved, and good industrial application prospects are achieved.

The invention relates to a method for recovering platinum in nickel-platinum waste. The method comprises the steps of hot nitric acid dissolution, filtration, pH adjustment, selective precipitation and drying. The characteristic that hot nitric acid can completely dissolve Ni and partially dissolve Pt is utilized to achieve preliminary separation of NiPt, sodium sulfide is used as a precipitator, selective precipitation of platinum is achieved through the Ksp difference of platinum sulfide and base metal sulfide within the pH range of 1-2, the recovery rate of platinum is greatly increased, and energy consumption of the platinum recovery process is reduced. Emission of a large amount of volatile acid is avoided while economic benefits are improved, and the method is more suitable for actual production.

The invention discloses a hydrogenation device scale inhibitor for heavy high-sulfur raw oil and a preparation method of the hydrogenation device scale inhibitor, and relates to the technical field of scale inhibitors. The scale inhibitor is prepared from a polyisobutylene succinimide dispersing agent, a high-temperature-resistant scale inhibition dispersing agent, an anti-rust agent, an imidazoline corrosion inhibitor, an antioxidant, a sulfide chelating agent, a clearing agent, cup carbazole alkylbenzene sulfonate and a solvent in specific parts by weight. The preparation method comprises the following steps: heating the solvent to 80-100 DEG C, sequentially adding the other components, and stirring for 30-40 minutes. Aiming at the characteristics of heavy high-sulfur raw oil, the scale inhibitor realizes high scale inhibition rate, excellent high-temperature stability and strong sulfur corrosion resistance through a multi-component synergistic effect, effectively solves the problems of scaling and corrosion of a hydrogenation device, prolongs the operation cycle of the device, and is suitable for a hydrogenation process of high-sulfur and high-asphaltene raw oil.

The invention discloses a powder metallurgy brake shoe for a locomotive and a preparation method, and relates to the technical field of metallurgy brake shoes, the powder metallurgy brake shoe comprises the following raw materials by mass percentage: 50%-70% of a matrix component, 10%-18% of a reinforcing component, 10%-16% of a lubricating component and 10%-16% of a friction component; the matrix component comprises electrolytic copper powder; the reinforcing components comprise reduced iron powder, superfine iron powder, atomized nickel powder, molybdenum powder and zinc powder; the lubricating component comprises artificial graphite and sulfide. According to the invention, the performance reduction of the brake shoe and the decline of a matrix at high temperature are effectively inhibited, the stability of a friction coefficient is kept, the abrasion is reduced, and the service life is prolonged.

The invention discloses a preparation method of a sulfide solid electrolyte, and relates to the field of solid-state batteries, the preparation method comprises the following steps: preparing Li2S-coated LiCl core-shell nanoparticles, and carrying out airflow collision grinding on the Li2S-coated LiCl core-shell nanoparticles and P2S5 nanopowder to obtain composite powder; the composite powder is placed in a reaction furnace for heating deposition, then heating crystallization is carried out, and Li6PS5Cl nanoparticles are obtained; the Li6PS5Cl nanoparticles are placed in a ball milling tank to be treated, then annealing treatment is conducted, and the sulfide solid electrolyte is obtained after treatment is completed. Through combination of the core-shell structure precursor and the vapor deposition technology, the core contradiction that nanocrystallization and high ionic conductivity are difficult to consider at the same time in the sulfide solid electrolyte field is effectively solved, and the problems of interface contact defects caused by micron-sized particles and crystal defects caused by mechanical refinement in a traditional process are effectively solved; the problem is solved through construction of Li2S-coated LiCl core-shell nanoparticles and activation treatment of airflow on collision and grinding.

The invention relates to the technical field of solid-state batteries, and particularly discloses an all-solid-state sulfide negative-electrode-free lithium metal battery and an assembling method thereof. The battery adopts a combination of an electrolyte membrane and electrolyte powder as an electrolyte layer, the electrolyte membrane is close to a positive electrode side, and the electrolyte powder is close to a negative electrode side. According to the structure, the compaction density and density of the electrolyte layer are remarkably improved, the growth of lithium dendrites is effectively inhibited, the interface impedance is reduced, and the volume change of the positive electrode is buffered. The assembly method comprises the following steps: compounding the positive electrode and the current collector, sequentially placing the electrolyte membrane, the electrolyte powder and the negative electrode plate, and carrying out pressure-maintaining molding under a specific pressure. Experiments show that the battery has high initial specific discharge capacity, long cycle life and high capacity retention rate, and is suitable for large-scale solid-state battery manufacturing.

The invention provides a preparation method of an alpha-difluoroselenomethyl ketone derivative, which is a method for preparing the alpha-difluoroselenomethyl ketone derivative by using 2, 2-difluoroolefin and dialkyl diselenide in the presence of iodosobenzene diacetate. The preparation method specifically comprises the following steps: dissolving 2, 2-difluoroolefin and a dialkyl diselenide compound in an organic solvent, uniformly mixing, adding iodobenzene diacetate, and stirring and reacting at a certain temperature in an air atmosphere to obtain the product alpha-difluoro (seleno) methyl ketone derivative. The alpha-difluoroselenomethyl ketone derivative can be mildly and efficiently obtained by only adopting iodobenzene diacetate without necessary catalysts, alkali, persulfide and persulfate compounds in the prior art. Wherein R1 and R2 are aliphatic hydrocarbon, substituted and unsubstituted benzene, substituted and unsubstituted naphthalene or other aromatic groups.

A solid electrolyte composition including (A) a sulfide solid electrolyte including lithium, phosphorus and sulfur, and (B) one or more compounds selected from the compounds represented by the following formulas (1) to (17).R11R12R13P  (1)(NR21R22)(NR23R24)(NR25R26)P  (2)R31R32R33PS  (3)(NR41R42)(NR43R44)(NR45R46)PS  (4)R51SH  (5)R61COOR62  (6)R71NH2  (7)R81R32R33N  (8)R91(OA)nOH  (9)(R101O)(R102O)(R103O)P  (10)R111R112R113R114M1  (11)R121R122R123M2  (12)R131R132R133M3  (13)R141—C(═O)NH—R142  (14)R151R152R153C—OH  (15)R161—O—R162  (16)(SR171)(SR172)(SR173)P  (17)

The invention discloses a coated sulfide-containing solid electrolyte material, a solid electrolyte thereof, and a solid-state battery containing the solid electrolyte. According to one aspect of the present invention, a coating is formed on the surface of a sulfide-containing solid electrolyte material and includes a compound having a thiol with a long hydrophobic tail, such as 1-undecanethiol. The coating may provide protection against air and moisture, for example, under ambient conditions.

The invention provides a sulfide electrolyte material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing lithium sulfide, phosphorus pentasulfide, rare earth sulfide and a solvent, and reacting to obtain a sulfide electrolyte precursor; and carrying out pressing treatment on the sulfide electrolyte precursor, and carrying out low-temperature sintering on the material obtained by pressing at 250-500 DEG C to obtain the sulfide electrolyte material. According to the method disclosed by the invention, the synthesis of the rare earth element doped sulfide precursor is realized by adopting a pure liquid phase method, particles are dispersed in a liquid phase solvent, and the particle uniformity and dispersity of the obtained finished product are obviously superior to those of a solid phase method. After the precursor obtained by the liquid phase method is pressed and sintered at low temperature, the crystal boundary between crystals of the electrolyte material is relatively small, the energy barrier of ion transmission is remarkably enhanced, the conductivity of the electrolyte is optimized, and the long-cycle stability of the all-solid-state battery is improved.

The application provides a continuous hydrogenation-isomerization method capable of meeting the treatment requirements of biological oils, especially waste oils, using a homogeneous hydrogenation process with strong adaptability to raw materials as a raw material pretreatment process, and matching a high-activity nanometer transition metal sulfide catalyst. On this basis, a catalytic distillation process is used for selective cracking of long-chain alkanes to improve the yield of medium and long-chain alkanes; an ultramicro flow hydrogen gas mixer and a reduced non-noble metal hydrogenation-isomerization catalyst are used to reduce the hydrogen / oil ratio and the energy consumption of the circulating hydrogen system, and to reduce the production cost of the catalyst, so as to finally realize efficient and low-carbon conversion of waste oils, and low-cost and high-selectivity preparation of biological aviation kerosene.

The present invention relates to a precursor for the production of an alloy used as a catalyst. The precursor comprises a metallic substrate, a layered structure comprising binders, metallic particles, and at least one metal oxide, metal phosphide, and / or metal sulfide, wherein the layered structure is arranged on the metallic substrate.

The invention discloses a preparation method of an ultrathin sulfide solid electrolyte dry-method membrane, relates to the technical field of solid electrolyte dry-method membranes, and solves the problems that a traditional solid electrolyte dry-method membrane needs to be subjected to transfer printing after being rolled, holes and cracks exist in an electrolyte membrane during transfer printing, and the thickness of the electrolyte membrane is difficult to reach 30 microns or below. Comprising the following steps: S1, preparing a positive thick film; s2, preparing an electrolyte thick film; s3, sequentially stacking the release film, the positive electrode thick film and the electrolyte thick film to form a laminated structure; s4, carrying out multi-stage rolling on the laminated structure by using a roller press and adopting a differential temperature multi-stage composite rolling method, and carrying out synchronous thinning and compounding on the positive electrode thick film and the electrolyte thick film to form a composite film; and S5, stripping the release film from the composite film to obtain the ultrathin sulfide solid electrolyte dry film. The problem that holes and cracks are generated in the transfer printing link after rolling of a traditional electrolyte thick film is solved.

The invention relates to the technical field of environmental analytical chemistry, and discloses a thymol phenolphthalein-TBPE double indicator-based cyanide titration detection method and system, and the method comprises the following steps: adjusting a water sample to be detected to an alkaline pH interval to construct a detection matrix; the method comprises the following steps: introducing a double-indicator system composed of thymol phenolphthalein and tetrabromo phenolphthalein ethyl ester according to a specific ratio into a detection matrix, and constructing a spectrum background for masking yellow interference of sulfide by utilizing the blue color development characteristic of thymol phenolphthalein; dropwise adding a silver nitrate standard solution into the mixed system to execute a complex reaction; according to the method, a spectrum background shielding field is constructed, chromaticity response of a system in a specific wave band is monitored in real time, and when a chromaticity mutation signal from green to bluish violet is captured, a titration end point is judged, and the cyanide concentration is calculated. High-precision anti-interference detection on cyanide in a complex high-turbidity matrix is realized, and the sensitivity and accuracy of end point recognition are improved.

The invention provides a sulfide all-solid-state battery positive electrode membrane as well as a preparation method and application thereof, and relates to the technical field of solid-state batteries. Specifically, the method comprises the following steps: carrying out dry-process mixing on positive electrode component raw materials, and then carrying out hot rolling to obtain a positive electrode film; wherein the positive electrode component raw materials comprise a positive electrode active material, sulfide solid electrolyte, a conductive agent and polytetrafluoroethylene. According to the preparation method, the positive electrode film is prepared by taking polytetrafluoroethylene as a unique bonding component through the technological processes of dry mixing and hot rolling, so that the stress change caused by volume expansion of the positive electrode is effectively inhibited, and the positive electrode capacity is exerted under the load of a high electrode active material; and the preparation process is simple and easy to implement and low in cost, and has good generalizability and application prospects.

The application belongs to the technical field of materials, and provides a preparation method of transition metal selenide / metallic phase molybdenum disulfide in-plane heterostructure and application thereof. The method is to take metallic phase molybdenum disulfide nanosheet as a main body, embed 2-5 nm transition metal selenide nanoclusters into the interior of the metallic phase molybdenum disulfide nanosheet, and make the two be in the same plane. The specific steps are as follows: a transition metal sulfide in-plane heterostructure prepared by a two-step hydrothermal method is used as a precursor, a gas phase selenization method is used to convert the in-plane transition metal sulfide into its selenide under the premise of retaining the metallic phase molybdenum disulfide, and a transition metal selenide / metallic phase molybdenum disulfide in-plane heterostructure is obtained. The prepared transition metal selenide / metallic phase molybdenum disulfide in-plane heterostructure powder and self-supporting electrode are used as a water electrolysis hydrogen evolution catalyst. The preparation process is simple, the price is low, and the method is green and environment-friendly. The material has super-high catalytic activity as the water electrolysis hydrogen evolution catalyst.

The invention discloses a coated sulfide solid electrolyte as well as a preparation method and application thereof. The coated sulfide solid electrolyte comprises sulfide solid electrolyte particles and a surface hydrophobic layer coating the sulfide solid electrolyte particles. Thus, the hydrophobic solvent and the sulfide solid electrolyte are tightly combined through intermolecular interaction force (O-S, S-S and I-S), the surface of the sulfide solid electrolyte is wrapped with the hydrophobic solvent, a surface hydrophobic layer of the sulfide solid electrolyte is formed, high ionic conductivity and good processability of the sulfide solid electrolyte are kept, and meanwhile, the surface hydrophobic layer of the sulfide solid electrolyte is formed. The reactivity of the sulfide solid electrolyte and air is effectively inhibited, and the core bottleneck that the sulfide solid electrolyte is sensitive to air and is easier to lose efficacy after being refined is systematically solved. The synergistic improvement of stability, interface performance and process feasibility is realized, and a key material support is provided for commercialization of sulfide all-solid-state batteries.

The invention relates to the technical field of all-solid-state batteries, in particular to a sulfide solid-state electrolyte membrane and a preparation method thereof.The sulfide solid-state electrolyte membrane comprises a sulfide solid-state electrolyte, a binder, a lithium salt and an interface lubricant, and the interface lubricant can dissolve the sulfide solid-state electrolyte and the lithium salt; the mass of the interface lubricant accounts for 0.1-1.4% of the total mass of the sulfide solid electrolyte membrane, and by adding a proper amount of the interface lubricant, when a battery cell is under high pressure, the interface lubricant can promote soft displacement among electrolyte particles, so that the compressive strength of the electrolyte membrane is improved, the rate capability of an all-solid-state battery is further improved, and the service life of the all-solid-state battery is prolonged. The lithium salt exists in the electrolyte membrane in a free state, so that lithium ions in the battery are supplemented, and the first effect of the battery is improved.

The invention discloses a sulfide all-solid-state battery silicon negative electrode binder and a preparation method and application thereof, and belongs to the technical field of all-solid-state batteries. The silicon negative electrode binder for the sulfide all-solid-state battery comprises a poly (acrylic acid-co-poly (ethylene glycol) methacrylate) grafted metal nanowire compound, can be well adhered to a pure silicon negative electrode, has excellent mechanical performance and also endows interface impedance regulation and control capability; on one hand, the tolerance to the volume change of the pure silicon negative electrode can be greatly improved, and cracks and pulverization in silicon can be effectively prevented, so that the pure silicon negative electrode has excellent cycle performance; and on the other hand, the interface impedance between the pure silicon negative electrode and the sulfide electrolyte can be effectively reduced, so that the pure silicon negative electrode has excellent rate capability. In addition, the sulfide all-solid-state battery silicon negative electrode binder is obtained only through two-step reaction, the preparation process is greatly simplified, meanwhile, the characteristic of high yield is achieved, and large-scale production is easier.

The invention belongs to the technical field of all-solid-state battery materials, and discloses argyrodite type sulfide solid electrolyte as well as a preparation method and application thereof. A lithium source 1, a lithium source 2, a sulfur source, a phosphorus source and LiX (X is Cl, Br or I) which are low in cost are used as raw materials, a Li2S raw material which is high in cost is replaced, and the argyrodite type sulfide solid electrolyte is prepared through vacuum ball milling, sintering and grinding. The argyrodite-type sulfide solid electrolyte has the advantages of low raw material cost, strong reaction activity and simple preparation process, and the prepared argyrodite-type sulfide solid electrolyte has excellent ionic conductivity, strong air stability and high (electro-chemical) stability, has excellent electrochemical performance when being applied to all-solid-state lithium batteries, and can be widely applied to all-solid-state lithium batteries. And large-scale application of the all-solid-state lithium battery is promoted.