Solid electrolyte composition, solid electrolyte-containing sheet and manufacturing method therefor, all-solid state secondary battery and manufacturing method therefor, and polymer and non-aqueous solvent dispersion thereof

Patent metadata

Field	Value
Publication number	US-11631885-B2
Application number	US-201916452696-A
Country	US
Kind code	B2
Filing date	Jun 26, 2019
Priority date	Feb 16, 2017
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

Provided are a solid electrolyte composition containing an inorganic solid electrolyte having a conductivity of an ion of a metal belonging to Group I or II of the periodic table and a binder having a specific hydrocarbon polymer segment and a specific segment, a solid electrolyte-containing sheet in which the same solid electrolyte composition is used and a manufacturing method therefor, an all-solid state secondary battery and a manufacturing method therefor, a polymer having a specific hydrocarbon polymer segment and a specific segment, and a non-aqueous solvent dispersion thereof.

First claim

What is claimed is:

1. An solid electrolyte composition comprising:
an inorganic solid electrolyte (A) having a conductivity of an ion of a metal belonging to Group I or II of the periodic table; and
a binder (B),
wherein the binder (B) has a segment a having at least one bond selected from a urethane bond, a urea bond, an amide bond, an imide bond, or an ester bond in a main chain and a functional group-containing hydrocarbon polymer segment having at least one selected from the following group of functional groups,
<group of functional groups>
a carboxylic acid group, a sulfonic acid group, a phosphoric acid group, a hydroxy group, an amino group, a cyano group, an alkoxysilyl group, an aromatic hydrocarbon ring group, an aromatic heterocyclic group, and an aliphatic hydrocarbon ring group in which three or more rings are fused, and
wherein the functional group-containing hydrocarbon polymer segment has at least one repeating unit selected from a repeating unit represented by Formula (1) or a repeating unit represented by Formula (2),

in Formula (1), R 11 to R 17 each independently represent a hydrogen atom, an alkyl group, or an aryl group, L 11 represents a divalent organic group that may have a substituent, and A represents a functional group selected from the group of functional groups,
in Formula (2), R 21 to R 27 each independently represent a hydrogen atom, an alkyl group, or an aryl group, and a partial structure -L 12 -A is represented by Formula (3a) or Formula (4a),

in Formula (3a) and Formula (4a), X represents —S—, L 21 represents a single bond or an alkylene group having 1 to 20 carbon atoms, L 22 represents a single bond, an alkylene group having 1 to 20 carbon atoms, or an arylene group having 6 to 20 carbon atoms, Y 2 represents a trivalent group made of hydrocarbon, L 23 and L 24 each independently represent a single bond or an alkylene group having 1 to 20 carbon atoms, A represents a functional group selected from the group of functional groups, and * represents a bonding portion with a C atom in Formula (2).

2. The solid electrolyte composition according to claim 1 ,
wherein the segment a is a hard segment having at least one bond selected from a urethane bond, a urea bond, an amide bond, or an imide bond in a main chain.

3. The solid electrolyte composition according to claim 1 ,
wherein a partial structure -L 11 -A in Formula (1) is represented by Formula (3) or Formula (4),

in Formula (3) and Formula (4), X represents —O—, —S—, or —N(R 3 )—, R 3 represents a hydrogen atom, an alkyl group, or an aryl group, L 21 represents a single bond or an alkylene group having 1 to 20 carbon atoms, L 22 represents a single bond, an alkylene group having 1 to 20 carbon atoms, or an arylene group having 6 to 20 carbon atoms, Y 2 represents a trivalent group made of hydrocarbon, L 23 and L 24 each independently represent a single bond or an alkylene group having 1 to 20 carbon atoms, A 2 represents a carboxylic acid group, and * represents a bonding portion with a C atom in Formula (1).

4. The solid electrolyte composition according to claim 1 ,
wherein the binder (B) has a soft segment which has a number-average molecular weight of 300 or more and has at least one chain selected from a polyalkylene ether chain, a polyester chain, a polycarbonate chain, or a silicone chain.

5. The solid electrolyte composition according to claim 1 ,
wherein the binder (B) has a non-functional group-containing hydrocarbon polymer segment that does not include any functional group selected from the group of functional groups.

6. The solid electrolyte composition according to claim 1 ,
wherein the binder (B) is a particulate polymer having an average particle diameter of 10 to 1,000 nm.

7. The solid electrolyte composition according to claim 1 , further comprising:
a dispersion medium (C).

8. The solid electrolyte composition according to claim 1 , further comprising:
an active material (D).

9. The solid electrolyte composition according to claim 1 , further comprising:
a conductive auxiliary agent (E).

10. The solid electrolyte composition according to claim 1 ,
wherein the inorganic solid electrolyte (A) is a sulfide-based inorganic solid electrolyte.

11. A solid electrolyte-containing sheet comprising:
an inorganic solid electrolyte (A) having a conductivity of an ion of a metal belonging to Group I or II of the periodic table; and a binder (B),
wherein the binder (B) has a segment a having at least one bond selected from a urethane bond, a urea bond, an amide bond, an imide bond, or an ester bond in a main chain and a functional group-containing hydrocarbon polymer segment having at least one selected from the following group of functional groups,
<group of functional groups>
a carboxylic acid group, a sulfonic acid group, a phosphoric acid group, a hydroxy group, an amino group, a cyano group, an alkoxysilyl group, an aromatic hydrocarbon ring group, an aromatic heterocyclic group, and an aliphatic hydrocarbon ring group in which three or more rings are fused, and
wherein the functional group-containing hydrocarbon polymer segment has at least one repeating unit selected from a repeating unit represented by Formula (1) or a repeating unit represented by Formula (2),

in Formula (1), R 11 to R 17 each independently represent a hydrogen atom, an alkyl group, or an aryl group, L 11 represents a divalent organic group that may have a substituent, and A represents a functional group selected from the group of functional groups,
in Formula (2), R 21 to R 27 each independently represent a hydrogen atom, an alkyl group, or an aryl group, and a partial structure -L 12 -A is represented by Formula (3a) or Formula (4a),

in Formula (3a) and Formula (4a), X represents —S—, L 21 represents a single bond or an alkylene group having 1 to 20 carbon atoms, L 22 represents a single bond, an alkylene group having 1 to 20 carbon atoms, or an arylene group having 6 to 20 carbon atoms, Y 2 represents a trivalent group made of hydrocarbon, L 23 and L 24 each independently represent a single bond or an alkylene group having 1 to 20 carbon atoms, A represents a functional group selected from the group of functional groups, and * represents a bonding portion with a C atom in Formula (2).

12. A method for manufacturing the solid electrolyte-containing sheet according to claim 11 , the method comprising:
a step of applying a solid electrolyte composition containing the inorganic solid electrolyte (A), the binder (B), and a dispersion medium (C) onto a base material; and
a step of drying the applied solid electrolyte composition.

13. A method for manufacturing an all-solid state secondary battery,
wherein an all-solid state secondary battery is manufactured using the method for manufacturing a solid electrolyte-containing sheet according to claim 12 .

Assignees

• Fujifilm Corp

Inventors

• Makino Masaomi
• Mimura Tomonori
• Kushida Yo

Classifications

• C08C19/00

  Chemical modification of rubber · CPC title

• H01M2300/0091

  in the form of mixtures · CPC title

• C08G18/3206

  aliphatic · CPC title

• C08J5/2231

  based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds · CPC title

• C08G18/7621

  being toluene diisocyanate including isomer mixtures · CPC title