Method of manufacturing sulfide-based solid electrolyte through wet process

Abstract

The invention provides a method of manufacturing a sulfide-based solid electrolyte through a wet process. The method includes preparing a slurry by adding a solvent to a mixture including lithium sulfide and a sulfide of a group 14 or group 15 element and amorphizing the mixture by milling the slurry. The slurry is dried in order to remove the solvent. The dried mixture is crystallized by heat-treating to form the sulfide-based solid electrolyte.

Description

technical field [0001] The present disclosure relates to a method of manufacturing a sulfide-based solid electrolyte through a wet process. Background technique [0002] Currently, secondary batteries have been widely used in large equipment (such as vehicles, power storage systems) to small equipment (such as mobile phones, video cameras, laptop computers). [0003] As application fields of secondary batteries have become wider, demands for improved safety and high performance of batteries have increased. [0004] Lithium secondary batteries, which are one type of secondary batteries, have the benefit of higher energy density and larger capacity per unit area than nickel manganese or nickel cadmium batteries. [0005] However, most electrolytes used in related art lithium secondary batteries are liquid electrolytes such as organic solvents. Therefore, there have always been safety concerns such as electrolyte leakage and the resulting fire risk [0006] Therefore, recent...

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Problems solved by technology

[0011] Because the material easily sticks to the wall surface of the container used in mechanical grinding, physical energy is not uniformly applied to the material, thus producing a difference in amorphization between sulfide-based solid electrolyte particles (powders), and further, sulfide-based The physical properties of solid electrolytes become inhomogeneous during crystallization by heat treatment

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