Solid electrolyte-containing layer

Patent metadata

Field	Value
Publication number	US-12469873-B2
Application number	US-202117796147-A
Country	US
Kind code	B2
Filing date	Jan 27, 2021
Priority date	Jan 31, 2020
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

Provided is a solid electrolyte-containing layer capable of preventing a short circuit caused by the formation of a dendrite. A solid electrolyte-containing layers ( 30 ) in accordance with an aspect of the present invention includes (i) an inorganic solid electrolyte ( 31 ), (ii) a heat-resistant resin ( 32 ), and (iii) at least one selected from the group consisting of an ionic liquid, a mixture of an ionic liquid and a lithium salt, and a polymer electrolyte.

First claim

The invention claimed is:

1 . An all-solid-state secondary battery comprising:
a positive electrode; one or more solid electrolyte-containing layers; and a negative electrode, the one or more solid electrolyte-containing layers each including the following components (i) to (iii):
(i) an inorganic solid electrolyte;
(ii) a heat-resistant resin; and
(iii) at least one selected from the group consisting of an ionic liquid, a mixture of an ionic liquid and a lithium salt, and a polymer electrolyte, wherein
in each of the one or more solid electrolyte-containing layers, the components (i) to (iii) are uniformly distributed in a film thickness direction, and when the one or more solid electrolyte-containing layers are a plurality of solid electrolyte-containing layers, two or more of the plurality of solid electrolyte-containing layers are not consecutively formed on top of each other.

2 . The all-solid-state secondary battery according to claim 1 , wherein the heat-resistant resin has a glass-transition temperature of not less than 200° C.

3 . The all-solid-state secondary battery according to claim 1 , wherein the inorganic solid electrolyte is a sulfide-based solid electrolyte or an oxide-based solid electrolyte.

4 . A method for producing an all-solid-state secondary battery, the method comprising the step of disposing, between a positive electrode and a negative electrode, one or more solid electrolyte-containing layers,
the one or more solid electrolyte-containing layers each including the following components (i) to (iii):
(i) an inorganic solid electrolyte;
(ii) a heat-resistant resin; and
(iii) at least one selected from the group consisting of an ionic liquid, a mixture of an ionic liquid and a lithium salt, and a polymer electrolyte, wherein
in each of the one or more solid electrolyte-containing layers, the components (i) to (iii) are uniformly distributed in a film thickness direction, and when the one or more solid electrolyte-containing layers are a plurality of solid electrolyte-containing layers, two or more of the plurality of solid electrolyte-containing layers are not consecutively formed on top of each other.

5 . A method for preventing a short circuit in an all-solid-state secondary battery, the method comprising disposing, between a positive electrode and a negative electrode, one or more solid electrolyte-containing layers,
the one or more solid electrolyte-containing layers each including the following components (i) to (iii):
(i) an inorganic solid electrolyte;
(ii) a heat-resistant resin; and
(iii) at least one selected from the group consisting of an ionic liquid, a mixture of an ionic liquid and a lithium salt, and a polymer electrolyte, wherein
in each of the one or more solid electrolyte-containing layers, the components (i) to (iii) are uniformly distributed in a film thickness direction, and when the one or more solid electrolyte-containing layers are a plurality of solid electrolyte-containing layers, two or more of the plurality of solid electrolyte-containing layers are not consecutively formed on top of each other.

Assignees

• Sumitomo Chemical Co

Inventors

• Suzuki Junji
• Murakami Chikara

Classifications

• H01M2300/0091

  in the form of mixtures · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M2300/0045

  Room temperature molten salts comprising at least one organic ion · CPC title

• H01M2300/0071

  Oxides · CPC title