Anode for all solid-state secondary battery, all solid-state secondary battery including the anode, and method of manufacturing the anode

Patent metadata

Field	Value
Publication number	US-2021408522-A1
Application number	US-202117471250-A
Country	US
Kind code	A1
Filing date	Sep 10, 2021
Priority date	Feb 7, 2017
Publication date	Dec 30, 2021
Grant date	—

Abstract

An anode for an all solid-state secondary battery, the anode including an anode collector, and coating lithium distribution layer disposed on the anode collector, wherein the lithium distribution layer includes a metal capable of forming an alloy with lithium.

First claim

What is claimed is:

1 . An all solid-state secondary battery comprising:
a cathode layer; a solid electrolyte layer on the cathode layer; and an anode layer on the solid electrolyte layer, the anode layer comprising
an anode collector, and
a lithium distribution layer disposed on the anode collector, wherein the lithium distribution layer comprises a metal capable of forming an alloy with lithium and is disposed between the solid electrolyte layer and the anode collector, and
wherein the lithium distribution layer has a thickness which is greater than or equal to about 1 nanometer and less than 100 nanometers.

2 . The all solid-state secondary battery of claim 1 , wherein the lithium distribution layer comprises zinc, germanium, tin, antimony, platinum, gold, bismuth, an alloy thereof, or a combination thereof.

3 . The all solid-state secondary battery of claim 1 , wherein the lithium distribution layer has a thickness which is about 2 nanometers to about 90 nanometers.

4 . The all solid-state secondary battery of claim 1 , wherein the anode collector comprises a conductive material and has a planar structure.

5 . The all solid-state secondary battery of claim 1 , wherein an electric capacity of the lithium distribution layer is less than an electric capacity of the all solid-state secondary battery.

6 . The all solid-state secondary battery of claim 1 , wherein the solid electrolyte layer is a porous sulfide solid electrolyte layer comprising Li 2 S—P 2 S 5 , Li 2 S—P 2 S 5 —LiX wherein X is I or Cl, Li 2 S—P 2 S 5 —Li 2 O, Li 2 S—P 2 S 5 —Li 2 O—LiI, Li 2 S—SiS 2 , Li 2 S—SiS 2 —LiI, Li 2 S—SiS 2 —LiBr, Li 2 S—SiS 2 —LiCl, Li 2 S—SiS 2 —B 2 S 3 —LiI, Li 2 S—SiS 2 —P 2 S 5 —LiI, Li 2 S—B 2 S 3 , Li 2 S—P 2 S 5 —Z m S n wherein m and n are integers and Z is Ge, Zn, or Ga, Li 2 S—GeS 2 , Li 2 S—SiS 2 —Li 3 PO 4 , Li 2 S—SiS 2 —Li p MO q wherein p and q are integers and M is P, Si, or Ge, or a combination thereof.

7 . The all solid-state secondary battery of claim 1 , wherein the lithium distribution layer comprises zinc, germanium, antimony, platinum, gold, bismuth, an alloy thereof, or a combination thereof.

8 . The all solid-state secondary battery of claim 7 , wherein the lithium distribution layer does not comprise tin.

9 . The all solid-state secondary battery of claim 1 , further comprising a lithium metal layer on the lithium distribution layer.

10 . The all solid-state secondary battery of claim 9 , wherein the lithium metal layer is on a surface of the lithium distribution layer facing the solid electrolyte layer.

11 . The all solid-state secondary battery of claim 1 , wherein when the all solid-state secondary battery is charged, lithium metal is precipitated on the lithium distribution layer facing the solid electrolyte layer.

12 . An all solid-state secondary battery comprising:
a cathode layer; a solid electrolyte layer on the cathode layer; an anode layer on the solid electrolyte layer, the anode layer comprising
an anode collector, and
a lithium distribution layer disposed on the anode collector, wherein the lithium distribution layer comprises a metal capable of forming an alloy with lithium and is disposed between the solid electrolyte layer and the anode collector, and
wherein the lithium distribution layer has a thickness which is greater than or equal to about 1 nanometer and less than 100 nanometers; and
a lithium metal layer a surface of the lithium distribution layer facing the solid electrolyte layer.

13 . The all solid-state secondary battery of claim 12 , wherein the lithium metal layer is precipitated on the lithium distribution layer during charge of the all solid-state secondary battery.

14 . The all solid-state secondary battery of claim 12 , wherein the lithium distribution layer comprises zinc, germanium, tin, antimony, platinum, gold, bismuth, an alloy thereof, or a combination thereof.

15 . The all solid-state secondary battery of claim 12 , wherein the lithium distribution layer has a thickness which is about 2 nanometers to about 90 nanometers.

16 . The all solid-state secondary battery of claim 12 , wherein the anode collector comprises a conductive material and has a planar structure.

17 . The all solid-state secondary battery of claim 12 , wherein an electric capacity of the lithium distribution layer is less than an electric capacity of the all solid-state secondary battery.

18 . The all solid-state secondary battery of claim 12 , wherein the solid electrolyte layer is a porous sulfide solid electrolyte layer comprising Li 2 S—P 2 S 5 , Li 2 S—P 2 S 5 —LiX wherein X is I or Cl, Li 2 S—P 2 S 5 —Li 2 O, Li 2 S—P 2 S 5 —Li 2 O—LiI, Li 2 S—SiS 2 , Li 2 S—SiS 2 —LiI, Li 2 S—SiS 2 —LiBr, Li 2 S—SiS 2 —LiCl, Li 2 S—SiS 2 —B 2 S 3 —LiI, Li 2 S—SiS 2 —P 2 S 5 —LiI, Li 2 S—B 2 S 3 , Li 2 S—P 2 S 5 —Z m S n wherein m and n are integers and Z is Ge, Zn, or Ga, Li 2 S—GeS 2 , Li 2 S—SiS 2 —Li 3 PO 4 , Li 2 S—SiS 2 —Li p MO q wherein p and q are integers and M is P, Si, or Ge, or a combination thereof.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Fujiki Satoshi
• Ito Seitaro
• Watanabe Taku
• Aihara Yuichi
• Yamada Takanobu

Classifications

• H01M10/44

  Methods for charging or discharging (circuits for charging H02J7/00) · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/387

  Tin or alloys based on tin · CPC title