337 results about "Lithium sulfide" patented technology

The invention belongs to the technical field of solid-state batteries, and provides a lithium-sulfur-phosphorus-chlorine-bromine solid-state electrolyte, a preparation method thereof and an all-solid-state battery. The preparation method comprises the following steps: mixing lithium sulfide and phosphorus sulfide, and carrying out ball milling to obtain a lithium-sulfur-phosphorus ternary mixture; in protective gas, the lithium-sulfur-phosphorus ternary mixture, lithium chloride and lithium bromide are mixed and then subjected to ball milling, and a lithium-sulfur-phosphorus-chlorine-bromine mixture is obtained; and carrying out heat treatment on the lithium-sulfur-phosphorus-chlorine-bromine mixture in protective gas to obtain the lithium-sulfur-phosphorus-chlorine-bromine solid electrolyte. The lithium-sulfur-phosphorus-chlorine-bromine solid electrolyte provided by the invention not only improves the electrochemical stability, but also maintains the high ionic conductivity characteristic.

The invention relates to the technical field of preparation of lithium sulfide, in particular to a method for preparing lithium sulfide through hydrogen reduction of lithium sulfate. According to the specific technical scheme, the method for preparing the lithium sulfide by reducing the lithium sulfate through the hydrogen comprises the steps that the lithium sulfate is smashed to be micron-sized and then fed into a fluidized bed reactor, then high-purity hydrogen preheated to 850 DEG C is introduced into the fluidized bed reactor from the bottom of the fluidized bed reactor, the reaction temperature is controlled to be 850 + / -20 DEG C, and the reaction time is controlled to be 5-10 min. The hydrogen reduction method is relatively low in reaction temperature (700-900 DEG C), hydrogen is used as a clean reducing agent, a reaction byproduct is only water, and the problems of insufficient purity, high energy consumption, serious environmental pollution and the like in a traditional lithium sulfide preparation method can be avoided. The introduction of the fluidized bed technology can greatly enhance the gas-solid phase heat and mass transfer efficiency, realizes the continuity and automation of the process, and is an important path for realizing the industrialization of the reaction.

The invention relates to a solid-phase preparation method and application of battery-grade lithium sulfide, and the preparation method comprises the following steps: (1) firstly, adopting industrial-grade lithium carbonate as a raw material, and carrying out pretreatment purification to remove sodium-calcium-magnesium metal ion impurities; (2) carrying out ball-milling mixing on the purified lithium carbonate raw material and sulfur powder, and carrying out low-temperature melting pre-sintering; (3) performing primary high-temperature calcination on the lithium carbonate and sulfur powder mixture under a protective atmosphere to synthesize a lithium sulfide crude product; (4) carrying out secondary high-temperature calcination on the lithium sulfide crude product in a protective atmosphere to remove excessive sulfur impurities and lithium polysulfide impurities so as to obtain purified lithium sulfide; and (5) carrying out ball milling and crushing on the obtained lithium sulfide, and screening to obtain the battery-grade lithium sulfide with different particle sizes. According to the preparation method, a high-temperature solid-phase synthesis method is adopted, and low-temperature melting pre-sintering and high-temperature two-step calcining methods are adopted, so that reaction byproducts are gas and are easy to remove, production and preparation of high-purity battery-grade lithium sulfide can be realized, and the product has excellent electrochemical performance.

A method for synergistically preparing lithium sulfide by vacuum molten salt based on hydrogen sulfide-lithium salt reaction belongs to the technical field of battery materials, and comprises the following steps: placing a lithium salt solid in a reactor, introducing a molten salt medium on the surface of the lithium salt or in a reaction system, introducing purified hydrogen sulfide gas under a vacuum auxiliary condition, controlling the reaction temperature to be 200-500 DEG C, and reacting for 1-2 hours; and adjusting the flow rate of hydrogen sulfide to be 50-1000mL / min and the retention time to be 5-180min, continuously exhausting gas to discharge water vapor in the reaction process, stopping introducing hydrogen sulfide gas after the reaction is finished, cooling the system to room temperature under the protection of inert gas, taking out the product, washing to remove residual fused salt, and carrying out vacuum drying to obtain the high-purity lithium sulfide. The prepared lithium sulfide has high purity (greater than or equal to 99.90%), low defect density and an excellent crystal structure, and can be widely applied to lithium-sulfur batteries, all-solid-state batteries and novel energy storage technologies, so that the energy density is improved, the cycle life is prolonged, and the energy consumption is reduced.

The invention relates to a method for preparing lithium sulfide at low temperature by microwave molten salt assisted carbon disulfide-lithium salt reaction, and belongs to the technical field of key materials of lithium-sulfur batteries and solid-state batteries. The technical problems of high energy consumption, difficulty in inhibiting by-products, insufficient purity and crystal phase stability, difficulty in continuous amplification and the like in the existing lithium sulfide preparation process are solved. Comprising the following steps: step 1, performing crushing, screening and grading treatment on lithium source powder; step 2, placing the treated lithium source powder and molten salt in a closed reactor, and introducing CS2 in a gas or liquid form; 3, applying microwave radiation, and reacting at a gas-solid-liquid multiphase interface to generate lithium sulfide; and 4, cooling the material after the reaction to room temperature, separating and recovering the fused salt to obtain the lithium sulfide powder. The method is low in reaction temperature, low in energy consumption, high in reaction rate, high in product purity and suitable for continuous and industrial production.

The invention provides a process for preparing high-purity lithium sulfide based on industrial waste salt recycling, which comprises the following steps: S1, mixing sulfur-containing waste salt and a waste carbon material, granulating, reducing, calcining, separating and purifying to obtain solid sodium sulfide; s2, mixing and ball-milling the obtained solid sodium sulfide and lithium chloride, adding a mixture of a catalyst and ethanol, and performing catalytic reaction to obtain a lithium sulfide crude product; and S3, purifying and drying the obtained lithium sulfide crude product to obtain the lithium sulfide. The method not only can break through the bottleneck of the existing production route, but also can realize the strategic direction of high-value utilization of bulk solid wastes, and has far-reaching significance for promoting sustainable development and green transformation of the battery industry.

The present invention relates to a method for preparing lithium sulfide, according to the present invention, when preparing lithium sulfide by a reaction between a lithium raw material and hydrogen sulfide, the reaction is carried out under relatively mild conditions compared to the prior art, so that frequent maintenance or replacement due to corrosion and failure of a reactor and various pipes is not required, thereby improving the economical efficiency of the process. Further, by reusing the unreacted hydrogen sulfide from which moisture has been removed and the solvent, process costs can be reduced, and economical efficiency can be ensured during mass production. Furthermore, moisture and water vapor generated in the lithium sulfide generation reaction are effectively removed, thereby preventing a reverse reaction for generating lithium hydroxide, promoting a positive reaction, and producing high-quality lithium sulfide with high purity and high yield. In addition, the particle size can be adjusted in units, and a separate pulverizing space or pulverizing table is not required, so that convenience and mass productivity are excellent.

The invention discloses lithium sulfide, a two-step double decomposition preparation method and application of the lithium sulfide in an all-solid-state battery, and belongs to the technical field of solid-state batteries. According to the preparation method, a two-step decomposition synthesis technology is adopted, lithium carbonate and ammonium thiocyanate are used as raw materials, the raw materials are uniformly mixed and then placed in a high-temperature reactor, a step heating sintering procedure is completed in an inert gas atmosphere, and the purpose of fully decomposing and converting the raw materials is achieved by accurately controlling the temperature and the time; after a product is obtained through reaction, the high-purity lithium sulfide material is obtained after the product is cooled to the room temperature. The method for preparing the lithium sulfide is low in raw material cost, simple in reactant formula and free of side reaction in the reaction process, and the finally generated product is few in impurity, high in purity and good in crystallinity.

The invention relates to the technical field of lithium-sulfur battery diaphragm materials and preparation thereof, and discloses a preparation method of a lithium-sulfur battery diaphragm modified material, which comprises the following steps: (1) preparing two MOF materials, namely Co-MOF and Mn-MOF, by a solvothermal method; (2) taking the Co-MOF and the Mn-MOF as raw materials, and preparing a CoSe / MnSe-N-C composite material derived from the Co-MOF and the Mn-MOF by utilizing a high-temperature sintering method; and (3) taking a CoSe / MnSe-N-C composite material derived from Co-MOF and Mn-MOF as a modifier, and adopting a coating method to obtain the modified PP diaphragm of the lithium-sulfur battery. According to the lithium-sulfur battery modified PP diaphragm provided by the invention, sulfur-loving sites, lithium-loving sites and catalytic electrode reaction active sites in the modifier CoSe / MnSe-N-C composite material can be utilized to effectively inhibit the shuttle effect of lithium polysulfide and the growth of lithium dendrites, the electrode reaction kinetics of the lithium polysulfide can be accelerated, and the overall electrochemical performance of the lithium-sulfur battery is greatly improved.

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 invention discloses micro-powder-grade lithium sulfide as well as a preparation method and application thereof. The preparation method comprises the following steps: heating lithium hydroxide to an impurity removal temperature under a vacuum condition, and preserving heat to obtain molten lithium hydroxide; the method comprises the following steps: transferring molten lithium hydroxide into reaction equipment, continuously introducing mixed gas containing hydrogen sulfide into the molten lithium hydroxide from a gas inlet at the bottom of the reaction equipment, carrying out stirring reaction at the temperature of 470-650 DEG C, discharging a reaction product into a high-temperature centrifugal machine after the reaction is finished, and centrifuging at the temperature of 500-600 DEG C, so as to obtain the hydrogen sulfide-containing lithium hydroxide. The lithium hydroxide melt obtained through centrifugation is returned to the reaction equipment, and the precipitate obtained through centrifugation is micro-powder-grade lithium sulfide. According to the method, molten lithium hydroxide and hydrogen sulfide gas are subjected to a reaction, lithium sulfide generated through the reaction is high in melting point and can be separated out in the form of small particles, and then the lithium sulfide can be separated from unreacted lithium hydroxide melt through high-temperature centrifugation.

The invention discloses a method for preparing high-purity lithium sulfide based on a solution double decomposition method, and belongs to the technical field of battery materials, and the method comprises the following steps: adding lithium chloride and sodium sulfide into ethanol, mixing, and reacting in the mixing process to generate lithium sulfide; performing solid-liquid separation on the reaction system to obtain a solid product; washing the solid product with tetrahydrofuran and drying; and continuously introducing inert gas into the heat treatment chamber to purge a solid product in the heat treatment chamber, carrying out heat treatment on the solid product under the conditions of 200-300 DEG C and 10-1000 Pa, and removing complex impurities in the solid product to obtain the high-purity lithium sulfide. Compared with the prior art, the method has the advantages that the Li2S.EtOH impurity in the lithium sulfide is removed, the lithium carbonate impurity generated by the reaction of the impurity at high temperature is reduced, and the risk of electrolyte and battery performance is further reduced.

The invention discloses a preparation method of high-purity lithium sulfide based on a carbon reduction method, and belongs to the technical field of material preparation. Comprising the following steps: S1, mixing anhydrous lithium sulfate with a reducing agent, and adding absolute ethyl alcohol as a solvent, S2, drying a material subjected to wet grinding, removing the absolute ethyl alcohol solvent and water, and transferring the material into a tubular furnace or an atmosphere sintering furnace to obtain a dried material; s3, the environment temperature in the furnace is increased to 600-800 DEG C at the heating rate of 5-12 DEG C / min, heat preservation is conducted for 30-60 min, and a reduction reaction is conducted; s4, after a reduction reaction product is cooled to the room temperature, adding absolute ethyl alcohol, stirring until the absolute ethyl alcohol is fully dissolved, completing solid-liquid separation through a suction filtration device, collecting filtrate and distilling; and S5, drying the distilled product to obtain the high-purity lithium sulfide. By accurately controlling the raw material purity, the reaction parameters and the purification process, the product purity is greater than or equal to 99.5%, the yield is greater than or equal to 89%, and the high-performance application requirements of solid-state batteries and the like are completely met; the method is simple in process steps, moderate in equipment requirements and suitable for large-scale industrial production.

The invention relates to the technical field of lithium sulfide preparation, in particular to a lithium sulfide preparation method, a battery and lithium sulfide.The lithium sulfide preparation method comprises the steps that a lithium source, sulfur and a reducing substance are mixed to obtain a mixture raw material, the mixture raw material is heated to 200-1200 DEG C, and lithium sulfide is obtained. The preparation process provided by the invention is simple, and lithium sulfide can be obtained by mixing the lithium source, the sulfur and the reducing substance as raw materials and carrying out one-step reaction.

The invention provides a process for preparing high-purity lithium sulfide through layer interface induction strengthening, which comprises the following steps: dissolving lithium chloride and sodium sulfide in N-methyl pyrrolidone, and stirring to form uniform slurry; pumping the obtained slurry into a fixed bed reactor filled with a molybdenum disulfide catalyst layered module, and reacting to obtain turbid liquid; performing temperature-controlled crystallization on the turbid liquid, filtering and separating to obtain sodium chloride crystals; performing reduced pressure distillation on the filtrate to obtain a lithium sulfide crude product; and dissolving the lithium sulfide crude product in absolute ethyl alcohol for washing, and carrying out suction filtration and drying to obtain lithium sulfide. According to the method disclosed by the invention, fixed bed catalytic reaction and programmed cooling crystallization separation are integrated, and process parameters are optimized, so that the core pain points of high energy consumption, poor safety, difficulty in separation, easiness in catalyst deactivation and the like in a traditional method are successfully solved; a green closed loop of the whole process flow is realized, and a reliable technical path is provided for industrial production of the high-performance lithium sulfide material.

The invention discloses an integrated sulfide solid electrolyte production system and method. The integrated sulfide solid electrolyte production system comprises a raw material pretreatment and feeding unit, a first-stage ball milling reactor, an online treatment device, a second-stage synthesis reactor and a whole-course inert gas protection and control system which are connected in sequence, the raw material pretreatment and feeding unit is used for drying and accurately metering sulfur powder and lithium hydride; the first-stage ball-milling reactor is used for receiving raw materials conveyed by the feeding unit and carrying out high-energy ball-milling reaction to generate a primary product containing lithium sulfide; the online treatment device is used for carrying out reaction promotion and impurity removal treatment on the primary product; the second-stage synthesis reactor receives the treated lithium sulfide product and mixes the treated lithium sulfide product with other sulfide raw materials to synthesize a target electrolyte; according to the whole-course inert gas protection and control system, the raw material pretreatment and feeding unit, the first-stage ball milling reactor, the online treatment device and the second-stage synthesis reactor are integrated in a closed inert atmosphere environment, so that continuous or semi-continuous transmission of materials is realized.

The present invention relates to a process for preparing lithium sulfide (LiS) from lithium hydroxide (LiOH) and hydrogen sulfide (HS), characterized in that the lithium hydroxide is sulfided in a reaction zone (9) comprising at least one moving-bed tubular reactor (9a) with an ascending oscillating spiral configuration, in which the lithium hydroxide (4) circulates countercurrently to an anhydrous gas mixture (10) containing hydrogen sulfide and at least one inert gas.

The application provides a phosphorus-aluminum inorganic adhesive for a lithium-sulfur battery and a preparation method thereof. The phosphorus-aluminum inorganic adhesive with a viscosity of 10-500 mPa.s and a solid content of 30-80% is prepared through a hydrothermal reaction of a phosphoric acid or hydrogen phosphate solution and an aluminum compound. The product has the characteristics of good strength, high-temperature resistance, and flame resistance. Compared with a traditional organic adhesive, the phosphorus-aluminum inorganic adhesive significantly reduces the use amount of the lithium-sulfur battery, increases the adhesion of the electrode material and the current collector, limits the diffusion of lithium polysulfide, enhances the transport capacity of lithium ions, and prolongs the cycle life of the battery. More importantly, the phosphorus-aluminum adhesive has excellent flame resistance, and when applied to the lithium-sulfur battery, the flame resistance of the battery can be improved, the use safety of the battery is improved, and the phosphorus-aluminum adhesive is expected to become a new type of environmentally-friendly flame-resistant lithium-sulfur battery adhesive.

This invention relates to the field of chemical equipment technology, and discloses a lithium sulfide preparation device and method, comprising: an insulated shell; a reactor rotatably disposed inside the insulated shell, with a heating chamber formed between the reactor and the insulated shell; a rotating shaft fixed to one end of the reactor, passing through one end of the insulated shell and rotatably engaging with a support assembly; a rotating assembly connected to the rotating shaft to drive its rotation; and a heat source inlet pipe fixed to one end face of the insulated shell to communicate with the interior of the heating chamber. This invention utilizes a dynamic reactor, causing the solid material to continuously tumble and shift during the reaction process, greatly increasing the contact area between the solid phase and the gaseous hydrogen sulfide, enhancing mass transfer efficiency, significantly improving product purity and reaction efficiency, shortening the production cycle, reducing equipment investment and energy consumption, and facilitating large-scale industrial production of high-purity lithium sulfide.

The invention provides lithium sulfide, a preparation method thereof and a solid-state battery, and belongs to the technical field of batteries, and the preparation method of the lithium sulfide comprises the following steps: performing hydrosulfide reaction on water-containing hydrosulfide and lithium salt dissolved in a first solvent under the protection of inert gas to obtain a first lithium hydrosulfide suspension, and performing solid-liquid separation to obtain a first lithium hydrosulfide solution, the first solvent comprises an aprotic polar organic solvent; decompressing and dewatering the first lithium hydrosulfide solution to obtain a second lithium hydrosulfide suspension, and performing solid-liquid separation to obtain a second lithium hydrosulfide solution in which the water content is 0.05-2%; and desulfurizing the second lithium hydrosulfide solution to obtain a lithium sulfide suspension, and carrying out solid-liquid separation to obtain lithium sulfide. According to the present invention, the low-cost water-containing hydrosulfide is selected as the raw material, the pressure reducing water removal process is added to remove the impurities, and then the desulfurization is performed to obtain the high-purity lithium sulfide;

The present invention relates to lithium sulfide and a method for preparing same, and provides lithium sulfide comprising peak A at 2.2 ppm to 2.5 ppm, peak B at 1.2 ppm to 2.1 ppm, peak C at -0.7 ppm to -0.5 ppm , peak D at 2.9 ppm to 3.1 ppm, and peak E at -0.2 ppm to 1.15 ppm, wherein, with respect to the integral ratio of the peaks, 5 ≤ A / B and 1 ≤ B / C.

A method for producing lithium sulfide according to the present invention is characterized by having a raw material mixing step (S1) in which lithium sulfate and a carbon material are mixed to form a mixed raw material, and a thermal reduction step (S2) in which the mixed raw material is heat-treated in a non-oxidizing atmosphere and the lithium sulfate is thermally reduced to generate lithium sulfide, the method also being characterized in that a carbon powder having a specific surface area measured by the BET method of 55 m2 / g or greater is used as the carbon material. A method for producing a sulfide-based solid electrolyte according to the present invention is characterized in that lithium sulfide produced through the method for producing lithium sulfide according to the present invention is used as a raw material.

The application relates to a preparation method of a lithium battery positive electrode and a lithium battery and relates to the new energy field.The preparation method of the lithium battery positive electrode comprises the following steps: taking a carbonizable polymer as a material, preparing a fiber film through electrostatic spinning; performing heat treatment on the fiber film to obtain a carbon fiber film; providing a nano sulfur particle suspension and a binder solution; performing suction filtration treatment on the nano sulfur particle suspension and the binder solution by taking the carbon fiber film as a filter membrane to obtain a prefabricated positive electrode; and drying the prefabricated positive electrode to obtain the lithium battery positive electrode.The application provides a large buffer space for volume changes in the mutual conversion process of sulfur and lithium sulfide, and can effectively improve the problem of low positive electrode conductivity of a lithium-sulfur system.In addition, the suction filtration treatment has the advantages of simple operation and easy control of the morphology of sulfur.

This invention discloses a modified separator for lithium-sulfur batteries, its preparation method, and its application. The modified separator comprises a base film and a modified layer disposed on one side of the base film. The modified layer comprises a dual rare-earth metal selenide-boron-nitrogen co-doped functionalized carbon nanotube hybrid material. The preparation method is as follows: S1, functionalized carbon nanotubes, a boron source, a nitrogen source, and a solvent are mixed, and then ultrasonically dispersed and stirred until the boron and nitrogen sources are completely dissolved to obtain a carbon nanotube solution; a selenium source, a reducing agent, and a nucleating agent are mixed to obtain a mixed solution; S2, the carbon nanotube solution is mixed with the mixed solution, cerium salt, and lanthanum salt, and a solvothermal reaction is performed. The solid is then separated to obtain the hybrid material. This invention, by modifying the separator towards the sulfur cathode with a specific hybrid material, provides a large number of adsorption sites and effectively anchors and catalyzes the conversion of lithium polysulfides, effectively improving the deposition kinetics of Li2S and increasing sulfur utilization, thereby enhancing the long-cycle stability of lithium-sulfur batteries.

A battery cell, a vehicle having a battery cell, and a method for forming a battery cell are provided. The battery cell includes: a cathode electrode including a cathode active material, where the cathode active material includes lithium sulfide (Li2S); an anode current collector serving as an anode electrode; solvating an ionic liquid (SIL) electrolyte; and a fluorinated ether diluent.

本发明涉及一种锂硫电极中硫化锂的品质分析方法，作为分析锂硫活性材料中残留锂化合物的方法，所述分析方法包括：准备包括正极活性材料的电极的步骤；对所述电极进行充放电，以获取关于随容量(Specific Capacity)变化的电压(Voltage)的第一数据的步骤；以及基于所述第一数据，通过对随所述电压(V)变化的电池容量(Q)对所述电压(V)的微分值(dQ / dV)进行积分，获取并分析根据计算出的面积值而得到的数据的步骤。

This invention belongs to the field of battery materials technology, specifically relating to a one-step continuous dehydration and sulfidation method for preparing lithium sulfide from lithium hydroxide monohydrate. This invention uses LiOH·H₂O as the lithium source for preparing lithium sulfide, significantly reducing costs. The dehydration and sulfidation steps are completed continuously and uninterruptedly within the same reaction vessel, using the same batch of materials, through program control. There are no intermediate material transfer, separation, or intermediate processing steps, avoiding exposure to air for moisture absorption, oxidation, and the introduction of impurities, thus ensuring high product purity.

The invention provides a preparation method for synthesizing lithium sulfide from industrial-grade lithium hydroxide and sodium sulfide, a preparation method for a solid electrolyte and a solid-state battery, and the preparation method for synthesizing lithium sulfide from industrial-grade lithium hydroxide and sodium sulfide comprises the following steps: dissolving an industrial-grade lithium hydroxide raw material, and sequentially carrying out oxidation, filtration, washing and drying to obtain lithium sulfide; sodium sulfide and a flocculating agent are added for precipitation and filtration, then sodium carbonate and barium nitrate are sequentially added for impurity removal and filtration, and a lithium hydroxide purified solution is obtained; reacting the sodium sulfide solid with dilute sulphuric acid to obtain hydrogen sulfide gas; hydrogen sulfide gas is introduced into the lithium hydroxide purification liquid for a reaction, and lithium sulfide slurry is obtained; evaporating, concentrating and crystallizing the lithium sulfide slurry, and centrifugally separating; and carrying out vacuum calcination on the crystal, and crushing to obtain lithium sulfide powder. Through oxidative conversion, chemical precipitation and crystallization purification, efficient and deep removal of impurities is realized, the problems that raw material components are complex and difficult to separate are solved, and the purity of lithium sulfide is improved.

The invention discloses a liquid-phase indirect preparation method of high-purity lithium sulfide, and belongs to the field of fine chemical engineering. The preparation method comprises the following steps: firstly, enabling metal lithium to react with high-purity naphthalene at low temperature in an ether solvent in an anhydrous oxygen-free argon atmosphere to generate naphthyl lithium; then introducing high-purity hydrogen sulfide and a naphthyl lithium carrier to react at room temperature to generate lithium hydrosulfide; then converting at 100-150 DEG C to generate lithium sulfide; and cooling, filtering in an argon atmosphere, washing with an ether solvent, and carrying out vacuum drying to obtain high-purity finely-dispersed lithium sulfide with the purity of more than 99.99%. Compared with the prior art, the lithium sulfide obtained by the preparation method disclosed by the invention is powder which is high in purity, uniform in granularity, fine in dispersion and relatively good in flowability, is stable in process and product quality, can be suitable for industrial-scale production of high-purity lithium sulfide, and has a very good popularization and application value.

A reactant generation system for a continuous production lithium sulfide fluidised bed reactor is disclosed which comprises a hydrogen generator in fluid communication with a natural gas source and a