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-2021408523-A1
Application number	US-202117471268-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 . A method of charging an all solid-state secondary battery, the method comprising:
providing an all solid-state battery comprising
a cathode layer,
a solid electrolyte layer on the cathode layer, and
an anode layer on the solid electrolyte layer and opposite the cathode 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,
wherein the anode collector comprises a different material than that of the lithium distribution layer,
wherein an electric capacity of the lithium distribution layer is less than an electric capacity of the all solid-state secondary battery, and
wherein a diffusion coefficient of lithium in the lithium distribution layer during charging the all solid-state secondary battery is greater than a diffusion coefficient of lithium in lithium metal;
applying a voltage between the cathode layer and the anode layer to form a lithium metal layer on the lithium distribution layer and charge the all solid-state secondary battery, wherein a thickness of the lithium metal layer is greater than a thickness of the lithium distribution layer.

2 . The method of claim 1 , wherein before the applying a voltage between the cathode layer and the anode layer, the lithium metal layer is not present in the anode layer.

3 . The method of claim 1 , wherein the applying a voltage between the cathode layer and the anode layer comprises charging the all solid-state secondary battery, and
wherein the charging comprises precipitating the lithium metal layer on a surface of the lithium distribution layer facing the solid electrolyte layer.

4 . The method of claim 1 , wherein the lithium metal layer is formed on a surface of the lithium distribution layer.

5 . The method of claim 1 , wherein the lithium distribution layer has a thickness which is greater than or equal to 1 nanometer and less than 100 nanometers.

6 . The method of claim 1 , wherein the solid electrolyte layer is a porous sulfide solid electrolyte layer and the porous sulfide solid electrolyte layer comprises 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 , Li2 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 method of claim 1 , wherein the lithium distribution layer comprises zinc, germanium, tin, antimony, platinum, gold, bismuth, an alloy thereof, or a combination thereof.

8 . The method of claim 1 , wherein the lithium distribution layer comprises zinc or bismuth.

9 . The method of claim 8 , wherein the lithium distribution layer does not comprise tin.

10 . The method of claim 1 , wherein a ratio of an electric capacity of the lithium distribution layer to an electric capacity of the all solid-state secondary battery is less than or equal to 0.07%.

11 . The method of claim 1 , wherein the lithium metal layer is a continuous layer on an entire surface of the lithium distribution layer.

12 . A method of manufacturing an all solid-state secondary battery, the method comprising:
providing a cathode layer, disposing a solid electrolyte layer on the cathode layer, and disposing an anode layer on the solid electrolyte layer and opposite the cathode layer to manufacture the all solid-state battery, wherein the anode layer comprises
an anode collector, and
a lithium distribution layer comprising a metal on a surface of the anode collector, the metal comprising zinc, germanium, tin, antimony, platinum, gold, bismuth, an alloy thereof, or a combination thereof, wherein the lithium distribution layer is disposed directly on the anode collector, and wherein the anode collector comprises a different material than that of the lithium distribution layer,
wherein a diffusion coefficient of lithium in the lithium distribution layer is greater than a diffusion coefficient of lithium in lithium metal during charge of the all solid-state secondary battery,
wherein the lithium distribution layer has a thickness which is greater than or equal to 1 nanometer and less than 100 nanometers, and
wherein an electric capacity of the lithium distribution layer is less than an electric capacity of the all solid-state secondary battery.

13 . The method of claim 12 , wherein the lithium distribution layer comprises zinc, tin, or bismuth.

14 . The method of claim 12 , wherein the lithium distribution layer is disposed between the solid electrolyte layer and the anode collector.

15 . The method of claim 12 , wherein the lithium distribution layer has a thickness which is about 2 nanometers to about 90 nanometers.

16 . The method of claim 12 , further comprising charging the all solid-state secondary battery to form a lithium metal layer on the lithium distribution layer.

17 . The method of claim 16 , wherein the lithium metal layer is a continuous layer on an entire surface of the lithium distribution layer.

18 . The method of claim 17 , wherein the entire surface of the lithium distribution layer faces the solid electrolyte layer.

Assignees

• Samsung Electronics Co Ltd

Inventors

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

Classifications

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/44

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

• H01M4/38

  of elements or alloys · CPC title

• H01M4/42

  Alloys based on zinc · CPC title

• H01M10/0525

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