Abstract

A method of preparing a sulfide-based solid electrolyte according to embodiments comprises mixing a solvent and a precursor in a reactor. An open vacuum atmosphere may be formed within the reactor. The mixture inside the reactor may be caused to react by stirring or under conditions of applying ultrasonic waves while maintaining the open vacuum atmosphere within the reactor. Accordingly, a high-purity sulfide-based solid electrolyte may be prepared with high efficiency.

IPC Classes  ?

• H01M 10/0562 - Solid materials

Abstract

Provided are a method for preparing a sulfide-based solid electrolyte, a sulfide-based solid electrolyte prepared by the method, and an all-solid-state lithium secondary battery including the sulfide-based solid electrolyte. The method includes a) mixing Li2S with P2S5 to prepare a mixed powder, b) placing the mixed powder, an ether, and stirring balls in a container, sealing the container, followed by stirring to prepare a suspension, and c) stirring the suspension under high-temperature and high-pressure conditions to prepare sulfide-based solid particles.

IPC Classes  ?

• H01M 10/0562 - Solid materials

Abstract

In a method for preparing a sulfide-based solid electrolyte according to embodiments, a solvent and a precursor are mixed in a reactor. An open vacuum atmosphere is formed in the reactor. While the open vacuum atmosphere in the reactor is maintained, the mixture in the reactor is subjected to a reaction under stirring or ultrasonic application conditions. A high-purity sulfide-based solid electrolyte can be prepared with high efficiency.

IPC Classes  ?

• C01B 25/14 - Sulfur, selenium, or tellurium compounds of phosphorus
• H01B 1/06 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of other non-metallic substances
• H01B 1/10 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of other non-metallic substances sulfides
• H01M 10/0562 - Solid materials

Abstract

An embodiment of the present invention discloses a method for producing a high-purity alkali metal sulfide, the method comprising the steps of: mixing an alkali metal sulfide salt precursor and a reducing agent to form a mixture; reducing the mixture to obtain an alkali metal sulfide; and purifying the obtained alkali metal sulfide.

IPC Classes  ?

• C01B 17/26 - Preparation by reduction with carbon
• C01B 17/28 - Preparation by reduction with reducing gases
• C01B 17/36 - Purification
• C01B 17/38 - Dehydration
• C01B 17/40 - Making shaped products, e.g. granules

Abstract

In a method for preparing a sulfide-based solid electrolyte according to embodiments, a solvent and a precursor are mixed in a reactor. An open vacuum atmosphere is formed in the reactor. While maintaining the open vacuum atmosphere in the reactor, the mixture inside the reactor is reacted under conditions of stirring or of application of ultrasonic waves. A high-purity sulfide-based solid electrolyte can be prepared with high efficiency.

IPC Classes  ?

• C01B 25/455 - Phosphates containing halogen
• H01M 10/0562 - Solid materials
• H01B 1/06 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of other non-metallic substances

Abstract

2S [Formula 2] AX wherein A represents an alkali metal, and X represents an element of the halogen group.

IPC Classes  ?

• H01M 10/0562 - Solid materials
• H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
• H01M 10/0585 - Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• C01B 25/14 - Sulfur, selenium, or tellurium compounds of phosphorus

Abstract

5 to prepare a mixed powder, b) placing the mixed powder, an ether, and stirring balls in a container, sealing the container, followed by stirring to prepare a suspension, and c) stirring the suspension under high-temperature and high-pressure conditions to prepare sulfide-based solid particles.

IPC Classes  ?

• H01M 10/00 - Secondary cellsManufacture thereof
• H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
• H01M 10/0562 - Solid materials