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

Patent metadata

Field	Value
Publication number	US-11417908-B2
Application number	US-201916520483-A
Country	US
Kind code	B2
Filing date	Jul 24, 2019
Priority date	Feb 13, 2017
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

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 constituent component, 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 constituent component, a non-aqueous solvent dispersion thereof, and a diol compound.

First claim

What is claimed is:

1. A 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 constituent component represented by Formula (1),

in Formula (1), R 1 represents a hydrogen atom, an alkyl group, or an aryl group, L a1 and L b1 each independently represent a single bond or an alkylene group, L 11 represents a divalent organic group, and A represents a group selected from a group of functional groups below,
<group of functional groups>
a carboxylic acid group, a sulfonic acid group, a phosphoric acid group, a cyano group, and a hydrocarbon ring group in which three or more rings are fused.

2. The solid electrolyte composition according to claim 1 ,
wherein one of L a1 and L b1 is a single bond, a methylene group, or an ethylene group, and the other of L a1 and L b1 is a methylene group or an ethylene group.

3. The solid electrolyte composition according to claim 1 ,
wherein a partial structure -L 11 -A in Formula (1) is represented by any of Formulae (3) to (7),

in Formulae (3) to (7), R 21 to R 26 each independently represent a hydrogen atom, an alkyl group, or an aryl group, L 2 represents an alkylene group having 1 to 18 carbon atoms, an alkenylene group having 2 to 20 carbon atoms or an arylene group having 6 to 16 carbon atoms, or a combination thereof, A 2 represents a carboxylic acid group, n, m, and l each independently represent an integer of 0 to 2, X represents —O—, —S—, or —N(R 2 )—, and R 2 represents a hydrogen atom, an alkyl group, or an aryl 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 hard segment having at least one bond selected from a urethane bond, a urea bond, an amide bond, and an imide bond and 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, and a silicone chain.

5. The solid electrolyte composition according to claim 1 ,
wherein the binder (B) has a hydrocarbon polymer segment.

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 constituent component represented by Formula (1),

in Formula (1), R 1 represents a hydrogen atom, an alkyl group, or an aryl group, L a1 and L b1 each independently represent a single bond or an alkylene group, L 11 represents a divalent organic group, and A represents a group selected from a group of functional groups below,
<group of functional groups>
a carboxylic acid group, a sulfonic acid group, a phosphoric acid group, a cyano group, and a hydrocarbon ring group in which three or more rings are fused.

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. An all-solid state secondary battery comprising:
a positive electrode active material layer;
a negative electrode active material layer; and
a solid electrolyte layer,
wherein at least one of the positive electrode active material layer, the negative electrode active material layer, and the solid electrolyte layer contains 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), and the binder (B) has a constituent component represented by Formula (1),

in Formula (1), R 1 represents a hydrogen atom, an alkyl group, or an aryl group, L a1 and L b1 each independently represent a single bond or an alkylene group, L 11 represents a divalent organic group, and A represents a group selected from a group of functional groups below,
<group of functional groups>
a carboxylic acid group, a sulfonic acid group, a phosphoric acid group, a cyano group, and a hydrocarbon ring group in which three or more rings are fused.

14. A method for manufacturing an all-solid state secondary battery, the method comprising preparing at least one of a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer by using the solid electrolyte-containing sheet obtained by the method according to claim 12 .

Assignees

• Fujifilm Corp

Inventors

• Makino Masaomi
• Mimura Tomonori
• Kushida Yo

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• C08G18/34

  Carboxylic acids; Esters thereof with monohydroxyl compounds · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title