Electrolyte compact production method and electrolyte compact

Patent metadata

Field	Value
Publication number	US-2024079643-A1
Application number	US-202218280172-A
Country	US
Kind code	A1
Filing date	Feb 28, 2022
Priority date	Mar 1, 2021
Publication date	Mar 7, 2024
Grant date	—

Abstract

A method for producing a compact of an electrolyte containing a sulfonyl imide compound represented by the general formula (1) includes compressing of performing compression-granulating of the electrolyte in a powder form to obtain a sheet-shaped or strip-shaped electrolyte, and pulverizing the sheet-shaped or strip-shaped electrolyte to obtain a granular electrolyte compact, or tableting the electrolyte in a powder form to obtain a tablet-shaped electrolyte compact. LiN(R1SO2)(R2SO2) (wherein R1 and R2 are identical or different from each other and each represent a fluorine atom, an alkyl group with 1 to 6 carbon atoms, or a fluoroalkyl group with 1 to 6 carbon atoms) (1).

First claim

1 . A method for producing a compact of an electrolyte containing a sulfonyl imide compound represented by the general formula (1), the method comprising:
compressing of performing compression-granulating of the electrolyte in a powder form to obtain a sheet-shaped or strip-shaped electrolyte; and pulverizing the sheet-shaped or strip-shaped electrolyte to obtain a granular electrolyte compact, LiN(R 1 SO 2 )(R 2 SO 2 ) (wherein R 1 and R 2 are identical or different from each other and each represent a fluorine atom, an alkyl group with 1 to 6 carbon atoms, or a fluoroalkyl group with 1 to 6 carbon atoms) (1).

2 . The method of claim 1 , wherein
in the compressing, the electrolyte in a powder form is compression-granulated by passing the electrolyte between press rollers in pair to obtain the sheet-shaped or strip-shaped electrolyte having a length in a longitudinal direction of from 10 mm to 100 mm inclusive.

3 . The method of claim 1 , wherein
in the compressing, a roller compactor is used.

4 . The method of claim 1 , wherein
in the pulverizing, a roll granulator is used.

5 . The method of claim 1 , wherein
the granular electrolyte compact has a particle diameter of from 1 mm to 10 mm inclusive.

6 . A method for producing a compact of an electrolyte containing a sulfonyl imide compound represented by the general formula (1), the method comprising:
tableting the electrolyte in a powder form to obtain a tablet-shaped electrolyte compact, LiN(R 1 SO 2 )(R 2 SO 2 ) (wherein R 1 and R 2 are identical or different from each other and each represent a fluorine atom, an alkyl group with 1 to 6 carbon atoms, or a fluoroalkyl group with 1 to 6 carbon atoms) (1).

7 . The method of claim 6 , further comprising:
drying the tablet-shaped electrolyte compact.

8 . The method of claim 6 , further comprising:
wetting the electrolyte in a powder form or the tablet-shaped electrolyte compact.

9 . The method of claim 6 , wherein
in the tableting, a rotary tablet press is used.

10 . The method of claim 6 , wherein
the tablet-shaped electrolyte compact has a particle diameter of from 5 mm to 25 mm inclusive.

11 . The method of claim 1 , wherein
the sulfonyl imide compound represented by the general formula (1) contains at least one of LiN(FSO 2 ) 2 or LiN(CF 3 SO 2 ) 2 .

12 . The method of claim 1 , wherein
the electrolyte further contains at least one selected from the group consisting of a compound represented by the general formula (2), a compound represented by the general formula (3), and LiAsF 6 ,
LiPF a (C m F 2m+1 ) 6-a   (2)

(where 0≤a≤6 and 1≤m≤4),
LiBF b (C n F 2n+1 ) 4-b   (3)

(where 0≤b≤4 and 1≤n≤4).

13 . A compact of an electrolyte containing a sulfonyl imide compound represented by the general formula (1),
a proportion of the electrolyte in a powder form having an average particle diameter of 1300 μm being 10 parts by mass or less relative to 100 parts by mass of the compact, the compact having a hardness of from 10 N to 50 N inclusive, LiN(R 1 SO 2 )(R 2 SO 2 ) (wherein R 1 and R 2 are identical or different from each other and each represent a fluorine atom, an alkyl group with 1 to 6 carbon atoms, or a fluoroalkyl group with 1 to 6 carbon atoms) (1).

14 . The compact of claim 13 , wherein
the compact has a particle diameter of from 5 mm to 25 mm inclusive.

15 . The method of claim 6 , wherein
the electrolyte in a powder form containing only the sulfonyl imide compound represented by the general formula (1) in a powder form is a starting material.

16 . The method of claim 6 , wherein
the sulfonyl imide compound represented by the general formula (1) contains at least one of LiN(FSO 2 ) 2 or LiN(CF 3 SO 2 ) 2 .

17 . The compact of claim 13 , wherein
the electrolyte contains only the sulfonyl imide compound represented by the general formula (1).

18 . The compact of claim 13 , wherein
the sulfonyl imide compound represented by the general formula (1) contains at least one of LiN(FSO 2 ) 2 or LiN(CF 3 SO 2 ) 2 .

Assignees

• Nippon Catalytic Chem Ind

Inventors

• Morita Tomohiro
• Okumura Yasunori
• Sakamoto Katsuhiko

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M2300/0085

  Immobilising or gelification of electrolyte · CPC title

• C01B21/086 Primary

  containing one or more sulfur atoms · CPC title

• H01M10/0568 Primary

  characterised by the solutes · CPC title