Solid electrolyte composition, solid electrolyte-containing sheet, all-solid state secondary battery, and methods for manufacturing solid electrolyte-containing sheet and all-solid state secondary battery

Patent metadata

Field	Value
Publication number	US-2019319303-A1
Application number	US-201916452815-A
Country	US
Kind code	A1
Filing date	Jun 26, 2019
Priority date	Feb 16, 2017
Publication date	Oct 17, 2019
Grant date	—

Abstract

Provided are a solid electrolyte composition containing 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), in which the binder (B) includes a polymer satisfying the following condition 1 or 2, a solid electrolyte-containing sheet, an all-solid state secondary battery, and methods for manufacturing a solid electrolyte-containing sheet and an all-solid state secondary battery.
(Condition 1) A Young's modulus is 0.003 GPa or more and less than 0.2 GPa and a breaking elongation is 300% to 700% (Condition 2) A Young's modulus is 0.2 to 2 GPa and a breaking elongation is 10% to 1,000%

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) includes a polymer satisfying the following condition 1 or 2, (condition 1) A Young's modulus is 0.003 GPa or more and less than 0.2 GPa and a breaking elongation is 300% to 700%, and (condition 2) A Young's modulus is 0.2 to 2 GPa and a breaking elongation is 10% to 1,000%.

2 . The solid electrolyte composition according to claim 1 ,
wherein the polymer satisfies the following condition 3, (condition 3) A Young's modulus is 0.2 to 2 GPa and a breaking elongation is 300% to 700%.

3 . The solid electrolyte composition according to claim 1 ,
wherein a yield elongation of the polymer is 10% or more.

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

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

6 . 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) includes a polymer satisfying the following condition 1 or 2, (condition 1) A Young's modulus is 0.003 GPa or more and less than 0.2 GPa and a breaking elongation is 300% to 700%, and (condition 2) A Young's modulus is 0.2 to 2 GPa and a breaking elongation is 10%/o to 1,000%.

7 . The solid electrolyte-containing sheet according to claim 6 , further comprising:
an active material (C).

8 . 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 layer of the positive electrode active material layer, the negative electrode active material layer, or the solid electrolyte layer is the solid electrolyte-containing sheet according to claim 6 .

9 . A method for manufacturing a solid electrolyte-containing sheet, the method comprising:
a step of applying the solid electrolyte composition according to claim 1 on a base material.

10 . A method for manufacturing an all-solid state secondary battery, the method comprising:
manufacturing an all-solid state secondary battery using the manufacturing method according to claim 9 .

Assignees

• Fujifilm Corp

Inventors

• Kushida Yo
• Makino Masaomi
• Mimura Tomonori
• Mochizuki Hiroaki

Classifications

• H01M2300/0065

  Solid electrolytes · CPC title

• H01M2300/0091

  in the form of mixtures · CPC title

• H01M10/0525

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

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title