Method for producing solid electrolyte

Patent metadata

Field	Value
Publication number	US-2016104916-A1
Application number	US-201414786808-A
Country	US
Kind code	A1
Filing date	Apr 21, 2014
Priority date	Apr 24, 2013
Publication date	Apr 14, 2016
Grant date	—

Abstract

A method for producing a solid electrolyte including step of bringing the following into contact with each other in a solvent having a solubility parameter of 9.0 or more: an alkali metal sulfide; one or two or more sulfur compounds selected from phosphorus sulfide, germanium sulfide, silicon sulfide and boron sulfide; and a halogen compound.

First claim

1 . A method for producing a solid electrolyte, comprising contacting the following (i), (ii) and (iii) with each other in a solvent having a solubility parameter of 9.0 or more:
(i) an alkali metal sulfide; (ii) one or more sulfur compounds selected from the group consisting of phosphorus sulfide, germanium sulfide, silicon sulfide and boron sulfide; and (iii) a halogen compound.

2 . The method of claim 1 , wherein the solvent is an ether.

3 . (canceled)

4 . The method of claim 1 , wherein a boiling point of the solvent is 65 to 200° C.

5 . (canceled)

6 . A method for producing a solid electrolyte, comprising contacting the following (i), (ii) and (iii) with each other in tetrahydrofuran:
(i) an alkali metal sulfide; (ii) one or more sulfur compounds selected from the group consisting of phosphorus sulfide, germanium sulfide, silicon sulfide and boron sulfide; and (iii) a halogen compound.

7 . The method of claim 1 , wherein the alkali metal sulfide has a particle size of 100 μm or less.

8 - 10 . (canceled)

11 . The method of claim 1 , wherein the alkali metal sulfide is lithium sulfide (Li 2 S) and the sulfur compound is phosphorus pentasulfide (P 2 S 5 ), and a mixing ratio of Li 2 S and P 2 S 5 (Li 2 S:P 2 S 5 ) is in a range of 68:32 to 80:20 in terms of molar ratio.

12 . The method of claim 11 , wherein the mixing ratio of Li 2 S and P 2 5 5 is in a range of 74:26 to 76:24 in terms of molar ratio.

13 - 19 . (canceled)

20 . The method of claim 1 , wherein the alkali metal sulfide is lithium sulfide (Li 2 S) and the sulfur compound comprises phosphorus sulfide.

21 . The method of claim 20 , wherein the halogen compound is a bromine compound.

22 . The method of claim 20 , wherein the halogen compound is LiBr or PBr 3 .

23 . The method of claim 2 , wherein a boiling point of the solvent is 65 to 200° C.

24 . The method of claim 2 , wherein the alkali metal sulfide has a particle size of 100 μm or less.

25 . The method of claim 21 , wherein the solvent is an ether.

26 . The method of claim 2 , wherein the alkali metal sulfide is lithium sulfide (Li 2 S) and the sulfur compound is phosphorus pentasulfide (P 2 5 5 ), and a mixing ratio of Li 2 S and P 2 5 5 (Li 2 S:P 2 S 5 ) is in a range of 74:26 to 76:24 in terms of molar ratio.

27 . The method of claim 26 , wherein the halogen compound is a bromine compound.

28 . The method of claim 2 , wherein the contacting is performed at a temperature of 20 to 200° C. and the contacting is performed for a time of 1 to 40 hours.

29 . The method of claim 25 , wherein the contacting is performed at a temperature of 20 to 200° C. and the contacting is performed for a time of 1 to 40 hours.

30 . A method for producing a solid electrolyte, comprising contacting the following (i), (ii) and (iii) with each other in an ether of the formula R 1 —O—R 2 where R 1 and R 2 are independently C 1 -C 6 alkyl groups:
(i) an alkali metal sulfide;
(ii) one or more sulfur compounds selected from the group consisting of phosphorus sulfide, germanium sulfide, silicon sulfide and boron sulfide; and
(iii) a halogen compound.

31 . The method of claim 30 , wherein the alkali metal sulfide has a particle size of 100 μm or less.

32 . The method of claim 30 , wherein the alkali metal sulfide is lithium sulfide (Li 2 S), the sulfur compound is phosphorus pentasulfide (P 2 S 5 ), and a mixing ratio of Li 2 S and P 2 5 5 (Li 2 S:P 2 S 5 ) is in a range of 74:26 to 76:24 in terms of molar ratio, and the halogen compound is a bromine compound.

Assignees

• Idemitsu Kosan Co

Inventors

• Seino Yoshikatsu
• Kambara Takayoshi
• Senga Minoru
• Aburatani Ryo
• Junke Tadanori
• Kimura Masakatsu

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M2300/0068

  inorganic · CPC title