All-solid-state secondary battery

Patent metadata

Field	Value
Publication number	US-11069898-B2
Application number	US-201816464706-A
Country	US
Kind code	B2
Filing date	Mar 27, 2018
Priority date	Mar 28, 2017
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

An all-solid-state secondary battery has a positive electrode collector, a positive electrode active material layer, a negative electrode active material layer, a negative electrode collector, and a solid electrolyte. The solid electrolyte has an interlayer solid electrolyte located between the positive electrode active material layer and the negative electrode active material layer, and the all-solid-state secondary battery further includes a trapping layer that traps a metal of which at least one of the positive electrode collector and the negative electrode collector is formed.

First claim

What is claimed is:

1. An all-solid-state secondary battery comprising a positive electrode collector, a positive electrode active material layer, a negative electrode active material layer, a negative electrode collector, and a solid electrolyte,
wherein the solid electrolyte has an interlayer solid electrolyte located between the positive electrode active material layer and the negative electrode active material layer,
the all-solid-state secondary battery further includes a trapping layer configured to trap a metal of which at least one of the positive electrode collector and the negative electrode collector is formed,
and the trapping layer is in the solid electrolyte.

2. The all-solid-state secondary battery according to claim 1 , wherein the trapping layer contains one or more metal elements selected from the group consisting of Cr, Mn, Fe, Co, Ni, and Zn.

3. The all-solid-state secondary battery according to claim 1 , wherein the trapping layer contains one or more of the group consisting of a metal, an alloy, an oxide, and a phosphorus oxide.

4. The all-solid-state secondary battery according to claim 1 , wherein a thickness of the trapping layer is within a ratio range between 0.003 and 6.67 with respect to a thickness of at least one of the positive electrode collector and the negative electrode collector.

5. The all-solid-state secondary battery according to claim 1 , wherein:
the solid electrolyte further has an outermost solid electrolyte located outside at least one of the positive electrode collector and the negative electrode collector; and
the trapping layer is located inside the outermost solid electrolyte.

6. The all-solid-state secondary battery according to claim 1 , wherein the positive electrode collector, the positive electrode active material layer, the negative electrode active material layer, the negative electrode collector, and the solid electrolyte have a relative density of 80% or more.

7. The all-solid-state secondary battery according to claim 2 , wherein the trapping layer contains one or more of the group consisting of a metal, an alloy, an oxide, and a phosphorus oxide.

8. The all-solid-state secondary battery according to claim 2 , wherein a thickness of the trapping layer is within a ratio range between 0.003 and 6.67 with respect to a thickness of at least one of the positive electrode collector and the negative electrode collector.

9. The all-solid-state secondary battery according to claim 3 , wherein a thickness of the trapping layer is within a ratio range between 0.003 and 6.67 with respect to a thickness of at least one of the positive electrode collector and the negative electrode collector.

10. The all-solid-state secondary battery according to claim 7 , wherein a thickness of the trapping layer is within a ratio range between 0.003 and 6.67 with respect to a thickness of at least one of the positive electrode collector and the negative electrode collector.

11. The all-solid-state secondary battery according to claim 2 , wherein:
the solid electrolyte further has an outermost solid electrolyte located outside at least one of the positive electrode collector and the negative electrode collector; and
the trapping layer is located inside the outermost solid electrolyte.

12. The all-solid-state secondary battery according to claim 3 , wherein:
the solid electrolyte further has an outermost solid electrolyte located outside at least one of the positive electrode collector and the negative electrode collector; and
the trapping layer is located inside the outermost solid electrolyte.

13. The all-solid-state secondary battery according to claim 4 , wherein:
the solid electrolyte further has an outermost solid electrolyte located outside at least one of the positive electrode collector and the negative electrode collector; and
the trapping layer is located inside the outermost solid electrolyte.

14. The all-solid-state secondary battery according to claim 7 , wherein:
the solid electrolyte further has an outermost solid electrolyte located outside at least one of the positive electrode collector and the negative electrode collector; and
the trapping layer is located inside the outermost solid electrolyte.

15. The all-solid-state secondary battery according to claim 2 , wherein the positive electrode collector, the positive electrode active material layer, the negative electrode active material layer, the negative electrode collector, and the solid electrolyte have a relative density of 80% or more.

16. The all-solid-state secondary battery according to claim 3 , wherein the positive electrode collector, the positive electrode active material layer, the negative electrode active material layer, the negative electrode collector, and the solid electrolyte have a relative density of 80% or more.

17. The all-solid-state secondary battery according to claim 4 , wherein the positive electrode collector, the positive electrode active material layer, the negative electrode active material layer, the negative electrode collector, and the solid electrolyte have a relative density of 80% or more.

18. The all-solid-state secondary battery according to claim 5 , wherein the positive electrode collector, the positive electrode active material layer, the negative electrode active material layer, the negative electrode collector, and the solid electrolyte have a relative density of 80% or more.

19. The all-solid-state secondary battery according to claim 7 , wherein the positive electrode collector, the positive electrode active material layer, the negative electrode active material layer, the negative electrode collector, and the solid electrolyte have a relative density of 80% or more.

Assignees

• Tdk Corp

Inventors

• Masuko Taisuke
• Yano Tomohiro
• Sato Hiroshi
• Oishi Masahiro

Classifications

• H01M6/185

  with oxides, hydroxides or oxysalts as solid electrolytes · CPC title

• H01M2300/0065

  Solid electrolytes · CPC title

• H01M10/056

  characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M6/181

  with polymeric electrolytes · CPC title