Secondary battery

Patent metadata

Field	Value
Publication number	US-12160016-B2
Application number	US-202117523072-A
Country	US
Kind code	B2
Filing date	Nov 10, 2021
Priority date	Nov 20, 2020
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

A secondary battery includes a negative electrode; a positive electrode including a plurality of positive electrode plates spaced apart from each other in a width direction, wherein a positive electrode plate of the plurality of positive electrode plates has a planar shape, and a channel between the plurality of positive electrode plates; an electrolyte material disposed in the channel between the plurality of positive electrode plates; a separation membrane between the negative electrode and the positive electrode; and a first metal layer disposed on a surface of the separation membrane facing the positive electrode.

First claim

What is claimed is:

1. A secondary battery comprising:
a negative electrode;
a positive electrode comprising
a plurality of positive electrode plates spaced apart from each other in a width direction, wherein a positive electrode plate of the plurality of positive electrode plates has a planar shape, and
a channel between the plurality of positive electrode plates;

an electrolyte material disposed in the channel between the plurality of positive electrode plates;
a separation membrane between the negative electrode and the positive electrode;
a first metal layer on a surface of the separation membrane facing the positive electrode; and
a protective layer between the separation membrane and the first metal layer, wherein the protective layer comprises a metallic Al, Si, Ti, Zr, Sn, Mg, Ca, or a combination thereof.

2. The secondary battery of claim 1 , wherein the first metal layer comprises aluminum, nickel, copper, silver, zinc, tin, gold, poly (3,4-ethylenedioxythiophene):poly (styrene sulfonate), polyaniline, polypyrrole, polythiophene functionalized with a carboxylate-containing polymer, or a combination thereof.

3. The secondary battery of claim 1 , wherein the first metal layer has a thickness of about 5 nanometers to about 500 nanometers.

4. The secondary battery of claim 1 , wherein the positive electrode further comprises
a base layer to which a first end of each positive electrode plate of the plurality of positive electrode plates is attached, and
wherein the plurality of positive electrode plates are spaced apart from each other at a predetermined interval on an upper surface of the base layer.

5. The secondary battery of claim 4 , wherein the base layer comprises a first positive active material, and the plurality of positive electrode plates comprises a second positive active material.

6. The secondary battery of claim 5 , wherein the first active positive material and the second positive active material are the same or different.

7. The secondary battery of claim 4 , further comprising:
a positive electrode current collecting layer disposed to face a surface of the base layer; and
a negative electrode current collecting layer facing a surface of the negative electrode and facing the positive electrode current collecting layer.

8. The secondary battery of claim 7 , wherein the second end of each positive electrode plate of the plurality of positive electrode plates is not attached to the base plate.

9. The secondary battery of claim 1 , wherein the plurality of positive electrode plates comprises a porous structure having a plurality of pores.

10. The secondary battery of claim 1 , wherein the plurality of positive electrode plates comprises LiCoO 2 , Li(Ni,Co,Mn)O 2 , Li(Ni,Co,Al)O 2 , LiMn 2 O 4 , LiFePO 4 , or a combination thereof.

11. A secondary battery, comprising:
a negative electrode;
a positive electrode comprising
a plurality of positive electrode plates spaced apart from each other in a width direction, wherein a positive electrode plate of the plurality of positive electrode plates has a planar shape, and
a channel between the plurality of positive electrode plates;

an electrolyte material disposed in the channel between the plurality of positive electrode plates;
a separation membrane between the negative electrode and the positive electrode;
a first metal layer on a surface of the separation membrane facing the positive electrode;
a second metal layer between the negative electrode and the separation membrane; and
a protective layer between the separation membrane and the first metal layer, wherein the protective layer comprises a metallic Al, Si, Ti, Zr, Sn, Mg, Ca, or a combination thereof.

12. The secondary battery of claim 11 , wherein the second metal layer comprises a lithium metal and has a film shape.

13. The secondary battery of claim 11 , wherein the second metal layer has a thickness of about 50 nanometers to about 10 micrometers.

14. The secondary battery of claim 11 , wherein the first metal layer comprises one or more of aluminum, nickel, copper, silver, zinc, tin, gold, poly (3,4-ethylenedioxythiophene):poly (styrene sulfonate), polyaniline, polypyrrole, polythiophene functionalized with a carboxylate-containing polymer, or a combination thereof.

15. The secondary battery of claim 11 , wherein the first metal layer has a thickness of about 5 nanometers to about 500 nanometers.

16. The secondary battery of claim 11 , wherein the positive electrode further comprises
a base layer to which a first end of each positive electrode plate of the plurality of positive electrode plates is attached,
wherein the plurality of positive electrode plates are spaced apart from each other at a predetermined interval on an upper surface of the base layer.

17. The secondary battery of claim 16 , wherein the base layer comprises a first positive active material, and the plurality of positive electrode plates comprises a second positive active material.

18. The secondary battery of claim 17 , wherein the first positive active material and the second positive active material are the same or different.

19. The secondary battery of claim 16 , further comprising:
a positive electrode current collecting layer disposed to face a surface of the based layer; and
a negative electrode current collecting layer facing a surface of the negative electrode and facing the positive electrode current collecting layer.

20. The secondary battery of claim 11 , wherein the plurality of positive electrode plates comprises a porous structure having a plurality of pores therein.

21. The secondary battery of claim 11 , wherein the plurality of positive electrode plates comprises LiCoO 2 , Li[Ni,Co,Mn]O 2 , Li [Ni,Co,Al]O 2 , LiMn 2 O 4 , LiFePO 4 , or a combination thereof.

22. A secondary battery comprising:
a negative electrode;
a positive electrode comprising
a plurality of positive electrode plates spaced apart from each other in a width direction, wherein a positive electrode plate of the plurality of positive electrode plates has a planar shape;

an electrolyte material between the plurality of positive electrode plates;
a separation membrane between the negative electrode and the plurality of positive electrode plates; and
a metal layer between the negative electrode and the separation membrane, wherein the metal layer is a metallic lithium having a film shape.

23. The secondary battery of claim 22 , wherein the metal layer has a thickness of about 50 nanometers to about 10 micrometers or less.

24. The secondary battery of claim 22 , wherein the positive electrode further comprises
a base layer to which a first end of each positive electrode plate of the plurality of positive electrode plates is attached, and
wherein the plurality of positive electrode plates are spaced apart from each other at a predetermined interval on an upper surface of the base layer.

25. The secondary battery of claim 24 , wherein the base layer comprises a first positive active material, and the plurality of positive electrode plates comprises a second positive active material.

26. The secondary battery of claim 25 , wherein the first positive active material and the second positive active material are the same or different.

27. The secondary battery of claim 24 , further comprising
a positive electrode current collecting layer disposed to face a su

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Kyounghwan
• Park Hwiyeol
• Park Joungwon
• Shon Jeongkuk
• Lee Junhyeong
• Jeong Huisu

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/5825

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

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title