Electrode structure, secondary battery including the same, and method of fabricating the electrode structure

Patent metadata

Field	Value
Publication number	US-2022293963-A1
Application number	US-202217685547-A
Country	US
Kind code	A1
Filing date	Mar 3, 2022
Priority date	Mar 9, 2021
Publication date	Sep 15, 2022
Grant date	—

Abstract

An electrode structure including an active material structure, the active material structure including a first active material plate having a plurality of first penetration holes extending in a thickness direction of the first active material plate; and a second active material plate stacked on a side of the first active material plate in a first direction, wherein the electrode structure is configured for use in a secondary battery.

First claim

1 . An electrode structure comprising:
a first active material structure comprising: a first active material plate having a plurality of first penetration holes extending in a thickness direction of the first active material plate; and a second active material plate stacked on a side of the first active material plate in a first direction.

2 . The electrode structure of claim 1 ,
wherein the second active material plate has a plurality of second penetration holes extending in a thickness direction of the second active material plate, and wherein at least a portion of the plurality of first penetration holes and at least a portion of the plurality of second penetration holes are aligned in the first direction, and a ratio of a sum of volumes of the plurality of first penetration holes to a sum of volumes of pores in the second active material plate is about 0.2:1 to about 7:1.

3 . The electrode structure of claim 1 , further comprising a second active material structure stacked on the first active material structure in the first direction,
wherein the second active material structure comprises: a third active material plate having a plurality of third penetration holes extending in a thickness direction of the third active material plate, and a fourth active material plate on a side of the third active material plate, and wherein at least a portion of the plurality of first penetration holes of the first active material plate and at least a portion of the plurality of third penetration holes of the third active material plate are aligned in the first direction.

4 . The electrode structure of claim 3 ,
wherein the second active material plate has a plurality of second penetration holes extending in a thickness direction of the second active material plate, the fourth active material plate has a plurality of fourth penetration holes extending in a thickness direction of the fourth active material plate, at least a portion of the plurality of first penetration holes of the first active material plate and at least a portion of the plurality of second penetration holes of the second active material plate are not aligned in the first direction, and at least a portion of the plurality of third penetration holes of the third active material plate and at least a portion of the plurality of fourth penetration holes of the fourth active material plate are not aligned in the first direction.

5 . The electrode structure of claim 1 , further comprising a second active material structure stacked on the first active material structure in the first direction,
wherein the second active material structure comprises: a third active material plate having a plurality of third penetration holes extending in a thickness direction of the third active material plate, and a fourth active material plate on a side of the third active material plate, and wherein at least a portion of the plurality of first penetration holes of the first active material plate and at least a portion of the plurality of third penetration holes of the third active material plate are not aligned in the first direction.

6 . The electrode structure of claim 5 ,
wherein the second active material plate has a plurality of second penetration holes extending in a thickness direction of the second active material plate, the fourth active material plate has a plurality of fourth penetration holes extending in a thickness direction of the fourth active material plate, at least a portion of the plurality of first penetration holes of the first active material plate and at least a portion of the plurality of second penetration holes of the second active material plate are aligned in the first direction, and at least a portion of the plurality of third penetration holes of the third active material plate and at least a portion of the plurality of fourth penetration holes of the fourth active material plate are aligned in the first direction.

7 . The electrode structure of claim 1 , further comprising an additional active material plate having a plurality of additional penetration holes extending in a thickness direction of the additional active material plate,
wherein the additional active material plate is on one or more of an uppermost surface or a lowermost surface of the first active material structure.

8 . The electrode structure of claim 1 ,
wherein the first active material plate and the second active material plate are binder-free.

9 . The electrode structure of claim 1 ,
wherein the second active material plate comprises an upper active material plate and a lower active material plate, and the first active material plate, the lower active material plate, and the upper active material plate are stacked in the first direction.

10 . The electrode structure of claim 9 ,
wherein the first active material plate has a first porosity, the lower active material plate has a second porosity, the upper active material plate has a third porosity, the first porosity is less than the second porosity, and the first porosity is less than the third porosity.

11 . The electrode structure of claim 10 ,
wherein the second porosity is equal to the third porosity, or the second porosity is less than the third porosity.

12 . The electrode structure of claim 9 ,
wherein the first active material plate, the lower active material plate, and the upper active material plate comprise a same positive electrode active material.

13 . The electrode structure of claim 9 ,
wherein at least two of the first active material plate, the lower active material plate, and the upper active material plate comprise different positive electrode active materials.

14 . The electrode structure of claim 12 ,
wherein one or more of the first active material plate, the lower active material plate, and the upper active material plate comprise a conductive material.

15 . The electrode structure of claim 14 ,
wherein the conductive material comprises one or more of Al, Cu, Ni, Co, Cr, W, Mo, Ag, Au, Pt, or Pb.

16 . The electrode structure of claim 1 ,
wherein a tortuosity of the plurality of first penetration holes is about 1 to about 1.5.

17 . The electrode structure of claim 1 ,
wherein a sum of each area of the plurality of first penetration holes on the side of the first active material plate on which the second active material plate is stacked is about 1% to about 5% of a total area of the side of the first active material plate on which the second active material plate is stacked.

18 . The electrode structure of claim 1 , further comprising a positive electrode current collecting layer on a side of the first active material structure.

19 . A method of fabricating an electrode structure, the method comprising:
stacking a first active material plate and a second active material plate in a first direction; drilling a plurality of first penetration holes extending in a thickness direction of the first active material plate and a plurality of second penetration holes extending in a thickness direction of the second active material plate to form an active material structure; and sintering the first active material plate and the second active material plate to fabricate the electrode structure, wherein the plurality of first penetration holes and the plurality of second penetration holes extend in the first direction.

20 . The method of fabricating an electrode structure of claim 19 ,
wherein a ratio of a sum of volumes of the plurality of first penetrat

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jeong Huisu
• Shon Jeongkuk
• Kim Kyounghwan
• Park Joungwon
• Park Hwiyeol
• Heo Jinsuck

Classifications

• H01M4/02

  Electrodes composed of, or comprising, active material · CPC title

• H01M10/04

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title

• H01M4/626 Primary

  Metals · CPC title

• H01M4/04

  Processes of manufacture in general · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title