All solid-state battery

Patent metadata

Field	Value
Publication number	US-2024283007-A1
Application number	US-202218021953-A
Country	US
Kind code	A1
Filing date	Nov 14, 2022
Priority date	Dec 6, 2021
Publication date	Aug 22, 2024
Grant date	—

Abstract

The present disclosure relates to an all-solid-state battery. Specifically, an embodiment provides a sintered all-solid-state battery including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer; wherein the positive electrode layer and the negative electrode layer include the same or different electrode active material particles; the solid electrolyte layer includes solid electrolyte particles; and an average diameter (a) of the electrode active material particles and an average diameter (b) of the solid electrolyte particles satisfy a relationship of an Equation 1:

0.5
≤

(

b
/
a

)

≤
2.5

[

Equation
⁢

1

]

First claim

1 . An all-solid-state battery, being a sintered all-solid-state battery, comprising:
a positive electrode layer, a solid electrolyte layer, and a negative electrode layer; wherein the positive electrode layer and the negative electrode layer include the same or different electrode active material particles, the solid electrolyte layer includes solid electrolyte particles; and an average diameter (a) of the electrode active material particles and an average diameter (b) of the solid electrolyte particles satisfy a relationship of an Equation 1:

0.5
≤

(

b
/
a

)

≤

2.5
.

[

Equation
⁢

1

]

2 . The all-solid-state battery of claim 1 , wherein the average diameter (a) of the electrode active material particles and the average diameter (b) of the solid electrolyte particles satisfy a relationship of an Equation 1-1:

1.1
≤

(

b
/
a

)

≤
1.4

[

Equation
⁢

1
-
1

]

3 . The all-solid-state battery of claim 1 , wherein the electrode active material particles include particles represented by a Chemical Formula 1:

wherein, in the Chemical Formula 1,
M is at least one selected from the group consisting of Fe, Co, Mn, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca, Sr, and Zr;

1
≤
x
≤
3

;

⁢

0
≤
y
<
2

;
and

⁢

2
≤
z
<
3.

4 . The all-solid-state battery of claim 1 , wherein the average diameter (a) of the electrode active material particles is about 2 μm to about 10 μm.

5 . The all-solid-state battery of claim 1 , wherein the solid electrolyte particles include particles represented by a Chemical Formula 2:

wherein,

0
<
y
≤

0.6
.

6 . The all-solid-state battery of claim 1 , wherein the average diameter (b) of the solid electrolyte particles is about 2 μm to about 10 μm.

7 . The all-solid-state battery of claim 1 , wherein the positive electrode layer and the negative electrode layer each independently include
a current collector; and an electrode active material layer disposed on one or both surfaces of the current collector and including the electrode active material particles.

8 . The all-solid-state battery of claim 7 , wherein the electrode active material layer further includes solid electrolyte particles that are the same as or different from those of the solid electrolyte layer.

9 . The all-solid-state battery of claim 7 , wherein the electrode active material layer includes the electrode active material particles and the solid electrolyte particles in a weight ratio of about 1:9 to about 9:1.

10 . The all-solid-state battery of claim 9 , wherein the electrode active material layer further includes a conductive material.

11 . The all-solid-state battery of claim 10 , wherein the solid electrolyte particles are included in an amount of about 15 wt % to about 60 wt %, the conductive material is included in an amount of about 1 wt % to about 5 wt %, and the electrode active material particles is included in a balance based on a total weight of the electrode active material layer.

12 . The all-solid-state battery of claim 7 , wherein the electrode active material layer has a thickness of about 1.0 μm to about 20 μm.

13 . The all-solid-state battery of claim 7 , wherein the current collector includes copper particles.

14 . The all-solid-state battery of claim 13 , wherein an average diameter of the copper particles is about 0.5 μm to about 5 μm.

15 . The all-solid-state battery of claim 1 , wherein a thickness of the solid electrolyte layer is about 1.0 μm to about 30 μm.

16 . The all-solid-state battery of claim 1 , wherein the sintered all-solid-state battery includes a body including the positive electrode layer and the negative electrode layer alternately stacked with the solid electrolyte layer interposed therebetween.

17 . The all-solid-state battery of claim 16 , wherein the sintered all-solid-state battery further includes a first external electrode and a second external electrode respectively disposed on both sides of the body.

18 . An all-solid-state battery, comprising:
a positive electrode layer, a solid electrolyte layer, and a negative electrode layer; wherein the positive electrode layer and the negative electrode layer include electrode active material particles represented by a Chemical Formula 1 that are the same as or different from each other; the solid electrolyte layer includes solid electrolyte particles represented by a Chemical Formula 2; and an average diameter (a) of the electrode active material particles and an average diameter (b) of the solid electrolyte particles satisfy a relationship of an Equation 1:

wherein, in the Chemical Formula 1,
M is at least one selected from the group consisting of Fe, Co, Mn, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca, Sr, and Zr;

Assignees

• Samsung Electro Mech

Inventors

• Kim Taehoon
• Park Seungjin
• Kim Minsoo
• Min Kyongbok
• Kim Kyunglock
• Kim Eunhyuk
• Lee Won-Seh
• Kim Jeongwook

Classifications

• H01M2300/0071

  Oxides · CPC title

• H01M4/5825 Primary

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M10/052

  Li-accumulators · CPC title