2results about How to "No purification required" patented technology

The application belongs to the technical field of lithium-sulfur battery manufacturing, and particularly relates to a preparation device and a preparation method of high-purity ultrafine lithium sulfide electrolyte. The preparation device of high-purity ultrafine lithium sulfide electrolyte comprises a reaction furnace, a lithium microflow mechanism and a sulfur gasification mechanism are throughly arranged on the reaction furnace, and an ultrasonic generator is further arranged on the reaction furnace, and a tray is slidably arranged in the reaction furnace. The lithium microflow mechanism comprises a glove box and a smelting furnace which are throughly connected, a first mechanical valve is arranged at the communication part of the glove box and the smelting furnace, and a feeding pipe is further throughly arranged between the glove box and the smelting furnace. The smelting furnace is throughly connected with the reaction furnace through a microflow pipeline, and a microflow meter is arranged on the microflow pipeline. The sulfur gasification mechanism comprises a sulfur raw material bin and a tubular furnace which are throughly connected through a raw material pipeline, and the tubular furnace is throughly connected with the reaction furnace through an airflow pipeline. The application can continuously prepare lithium-sulfur electrolyte with high purity and low particle size without interruption, has the advantages of low cost and no other sulfide production, and is suitable for industrial production.

The invention relates to the technical field of electrode materials, in particular to a sulfide solid electrolyte and a preparation method thereof, and the preparation method is characterized by comprising the following steps: (1) selecting a lithium source and at least three of a sulfur source, a phosphorus source, elemental sulfur and a halogen source as raw materials, and mixing; the lithium source comprises at least one of lithium carbonate, lithium sulfate, lithium oxide, lithium hydroxide, lithium thiosulfate and lithium sulfite; and (2) putting the mixture prepared in the step (1) into a sintering furnace under the protection of inert gas, and introducing reducing gas for sintering treatment to obtain the sulfide electrolyte. The sulfide solid electrolyte provided by the invention adopts the lithium salt of non-lithium sulfide as the lithium source, the sulfide electrolyte is prepared by a one-step method, an intermediate lithium sulfide preparation link is omitted, and the sulfide solid electrolyte has the characteristics of low cost, simple process, batch industrial production and the like.