Method for producing sulfide glass or sulfide glass ceramic capable of conducing lithium ion, and whole solid type cell using said glass ceramic

• US 20050107239A1
• Filed: 01/14/2003
• Published: 05/19/2005
• Est. Priority Date: 01/15/2002
• Status: Abandoned Application

• Current Assignee: Idemitsu Kosan Company Limited, Masahiro Tatsumisago
• Original Assignee: Idemitsu Petrochemical Co., Ltd. (Idemitsu Kosan Company Limited)
• Inventors: Akiba, Iwao, Tatsumisago, Masahiro
• Application Number:
  US10/500,456
• Publication Number:
  US 20050107239A1
• Time in Patent Office: Days
• US Class Current: 501/40
• CPC Class Codes: C03B 19/1005 Forming solid beads chemical aspects C03C12/00
• CPC Class Codes: C03B 2201/86 Chalcogenide glasses, i.e. S, Se or Te glasses
• CPC Class Codes: C03C 3/321 Chalcogenide glasses, e.g. containing S, Se, Te
• CPC Class Codes: C03C 4/14 for electro-conductive glass
• CPC Class Codes: H01B 1/10 sulfides
• CPC Class Codes: H01B 1/122 Ionic conductors
• 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

Abstract

The present invention relates to a process for producing sulfide glass or sulfide glass ceramic each capable of conducting a lithium ion, comprising subjecting metallic lithium, sulfur as a simple substance and phosphorus as a simple substance as starting raw materials, which constitute the sulfide glass and sulfide glass ceramic, to mechanical milling to thereby convert them into sulfide glass or sulfide glass ceramic; and a whole solid type cell using the above-mentioned sulfide glass ceramic as a solid electrolyte. According to the present invention, it is made possible to produce sulfide glass and sulfide glass ceramic which are each capable of conducting a lithium ion and which have high electroconductivity at room temperature by a simple and advantageous process from starting raw materials being easily available and inexpensive.

Claims

1. A process for producing sulfide glass or sulfide glass ceramic each capable of conducting a lithium ion, comprising subjecting metallic lithium, sulfur as a simple substance and phosphorus as a simple substance as starting raw materials, which constitute said sulfide glass and sulfide glass ceramic, to mechanical milling to thereby convert them into sulfide glass or sulfide glass ceramic.

2. The process for producing sulfide glass or sulfide glass ceramic each capable of conducting a lithium ion according to claim 1, wherein the simple element further comprises at least one element selected from the group consisting of metallic germanium, metallic aluminum, metallic iron, metallic zinc, silicon as a simple substance and boron as a simple substance.

3. The process for producing sulfide glass or sulfide glass ceramic each capable of conducting a lithium ion according to claim 1, wherein the metallic lithium is replaced in part or in whole with lithium sulfide.

4. The process for producing sulfide glass ceramic capable of conducting a lithium ion according to claim 1, wherein the sulfide glass which has been vitrified by the above-stated mechanical milling is calcined at the glass transition temperature thereof or higher.

5. The process for producing sulfide glass ceramic capable of conducting a lithium ion according to claim 4, wherein the above-stated sulfide glass is calcined at 150°

C. or higher.

6. The process for producing sulfide glass ceramic capable of conducting a lithium ion according to claim 4, wherein the above-stated sulfide glass is calcined under vacuum or in the presence of an inert gas.

7. The process for producing sulfide glass or sulfide glass ceramic each capable of conducting a lithium ion according to claim 1, wherein the decomposition voltage of any of the above-stated sulfide glass and sulfide glass ceramic is at least 3 V.

8. A whole solid type cell which comprises using, as a solid electrolyte, the sulfide glass or sulfide glass ceramic each being produced by the process as set forth in claim 1.