Method for manufacturing sulfide-based solid electrolyte

• US 9,231,275 B2
• Filed: 07/17/2014
• Issued: 01/05/2016
• Est. Priority Date: 07/22/2013
• Status: Active Grant

• Current Assignee: SK On Company Limited (SK Innovation Company Limited)
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Young-Gi, Kim, Kwang Man, Kang, Kunyoung, Shin, Dong Ok, S, Amaresh, Lee, Yun Sung, Kim, Kwang Jin
• Primary Examiner(s): SIDDIQUEE, MUHAMMAD S
• Application Number:
  US14/334,251
• Publication Number:
  US 20150024281A1
• Time in Patent Office: 537 Days
• US Class Current: 1/1
• CPC Class Codes: C01B 17/22 Alkali metal sulfides or polysulfides
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

Provided is a method for manufacturing a sulfide-based solid electrolyte including preparing a precursor comprising lithium sulfide, germanium sulfide, aluminum sulfide, phosphorus sulfide, and sulfur, conducting a mixing process of the precursor to prepare a mixture, and crystallizing the mixture to form a compound represented by Li_9.7Al_0.3Ge_0.7P₂S₁₂. The sulfide-based solid electrolyte may have high ionic conductivity.

Claims

1. A method for manufacturing a sulfide-based solid electrolyte, the method comprising:

preparing a precursor comprising lithium sulfide, germanium sulfide, aluminum sulfide, phosphorus sulfide, and sulfur;

conducting a mixing process of the precursor to prepare a mixture; and

crystallizing the mixture to form a compound represented by Li_9.7Al_0.3Ge_0.7P₂S₁₂.

2. The method for manufacturing a sulfide-based solid electrolyte of claim 1, wherein the mixing process is conducted by a ball milling process using an inert gas.

3. The method for manufacturing a sulfide-based solid electrolyte of claim 1, wherein the crystallizing of the mixture is conducted at about 500°

C. to about 600°

C. for about 6 hours to about 8 hours.