Electrochemical device

Patent metadata

Field	Value
Publication number	US-10930977-B2
Application number	US-201816049888-A
Country	US
Kind code	B2
Filing date	Jul 31, 2018
Priority date	Jan 11, 2018
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

An electrochemical device including: a positive electrode current collector; a plurality of positive electrodes disposed on the positive electrode current collector; an electrolyte layer disposed on the plurality of positive electrodes; a negative electrode disposed on the electrolyte layer; and a negative electrode current collector disposed on the negative electrode, wherein the electrolyte layer includes a first electrolyte layer and a second electrolyte layer, and wherein the second electrolyte layer is between the first electrolyte layer and the negative electrode.

First claim

What is claimed is:

1. An electrochemical device, comprising:
a positive electrode current collector;
a plurality of positive electrodes disposed on the positive electrode current collector;
an electrolyte layer disposed on the plurality of positive electrodes;
a negative electrode disposed on the electrolyte layer;
a negative electrode current collector disposed on the negative electrode; and
a first protruding portion comprising a positive electrode of the plurality of positive electrodes, wherein adjacent positive electrodes define a first indented portion between the adjacent positive electrodes of the plurality of positive electrodes,
wherein the electrolyte layer comprises a second protruding portion and a second indented portion, wherein the second protruding portion is disposed on the first protruding portion and wherein the second indented portion is on the first indented portion,
wherein the electrolyte layer comprises a first electrolyte layer and a second electrolyte layer, and wherein the second electrolyte layer is between the first electrolyte layer and the negative electrode,
wherein the first electrolyte layer comprises a third protruding portion and a third indented portion, the third protruding portion being disposed on the first protruding portion and the third indented portion disposed on the first indented portion,
wherein the second electrolyte layer comprises a fourth protruding portion and a fourth indented portion, the fourth protruding portion disposed on the third protruding portion and the fourth indented portion disposed on the third indented portion, and
wherein
the third indented portion of the first electrolyte layer comprises a side surface, and a thickness of the first electrolyte layer at a location proximate to the positive electrode current collector is greater than a thickness of the first electrolyte layer at a location distal to the positive electrode current collector, or
a surface of the third protruding portion of the first electrolyte layer that is distal to the positive electrode current collector is a curved surface, or
each of the third indented portion and the fourth indented portion comprises a side surface, and a surface of the second electrolyte layer constituting the side surface of the fourth indented portion is not parallel to a surface of the first electrolyte layer constituting the side surface of the third indented portion, or
the fourth indented portion of the second electrolyte layer comprises a side surface, and wherein a thickness of the second electrolyte layer constituting the side surface of the fourth indented portion is thinnest at a location of the fourth indented portion that is proximate to the positive electrode current collector.

2. The electrochemical device of claim 1 ,
wherein the third indented portion of the first electrolyte layer comprises a side surface, and
wherein a thickness of the first electrolyte layer at a location proximate to the positive electrode current collector is greater than a thickness of the first electrolyte layer at a location distal to the positive electrode current collector.

3. The electrochemical device of claim 2 ,
wherein the first electrolyte layer constituting a side surface of the third indented portion comprises a portion having a thickness of about 2 micrometers or greater.

4. The electrochemical device of claim 2 ,
wherein the thickness of the first electrolyte layer constituting the side surface of the third indented portion is thinnest at a location between about 10% to about 90% of a total depth of the third indented portion.

5. The electrochemical device of claim 2 ,
wherein a surface of the third indented portion proximate to the positive electrode current collector is a curved surface.

6. The electrochemical device of claim 5 ,
wherein the curved surface is convexly disposed in a direction of the positive electrode current collector, and wherein the curved surface has a radius of curvature of about 10 micrometers or greater.

7. The electrochemical device of claim 2 ,
wherein at least a part of a surface of the third indented portion proximate to the positive electrode current collector is a flat surface, and
wherein a connected portion between the surface of the third indented portion proximate to the positive electrode current collector and the side surface of the third indented portion is a curved surface.

8. The electrochemical device of claim 1 ,
wherein a surface of the third protruding portion of the first electrolyte layer that is distal to the positive electrode current collector is a curved surface.

9. The electrochemical device of claim 8 ,
wherein the curved surface is convexly disposed in a direction opposite to the positive electrode current collector, and
wherein the curved surface has a radius of curvature of 10 micrometers or greater.

10. The electrochemical device of claim 1 ,
wherein the fourth indented portion of the second electrolyte layer comprises a side surface, and wherein a thickness of the second electrolyte layer constituting the side surface of the fourth indented portion is thinnest at a location of the fourth indented portion that is proximate to the positive electrode current collector.

11. The electrochemical device of claim 10 ,
wherein the thickness of the second electrolyte layer constituting the side surface of the fourth indented portion decreases in a direction towards the portion of the fourth indented portion that is proximate to the positive electrode current collector.

12. A electrochemical device, comprising:
a positive electrode current collector;
a plurality of positive electrodes disposed on the positive electrode current collector;
an electrolyte layer disposed on the plurality of positive electrodes;
a negative electrode disposed on the electrolyte layer; and
a negative electrode current collector disposed on the negative electrode,
wherein the electrolyte layer comprises a first electrolyte layer and a second electrolyte layer, and wherein the second electrolyte layer is between the first electrolyte layer and the negative electrode, and
wherein a surface of the first electrolyte layer is not parallel to a surface of the second electrolyte layer.

13. The electrochemical device of claim 1 ,
wherein each of the third indented portion and the fourth indented portion comprises a side surface, and
wherein a surface of the second electrolyte layer constituting the side surface of the fourth indented portion is not parallel to a surface of the first electrolyte layer constituting the side surface of the third indented portion.

14. The electrochemical device of claim 1 , further comprising:
a module comprising the plurality of positive electrodes.

15. The electrochemical device of claim 1 , further comprising:
a plurality of modules spaced apart from each other.

16. The electrochemical device of claim 14 ,
wherein the module comprises a barrier rib contacting the plurality of positive electrodes.

17. The electrochemical device of claim 1 ,
wherein the first electrolyte layer and the second electrolyte layer have different compositions than each other.

18. The electrochemical device of claim 1 , wherein the first electrolyte layer comprises Li x PO y N z wherein x=2y+3z−5, Li x La y M z O 12 wherein M is Te, Nb, Zr, or a combination thereof, 0<x<3, 0<y<3 and 0<z<3, Li x Ti y (PO 4 ) 3 wherein 0<x<2 and 0<y<3, Li x Al y Ti z (PO 4 ) 3 wherein 0<x<2, 0<y<1, and 0<z<3, Li 1+x+y (Al a Ga 1-a ) x (Ti b Ge 1-b ) 2−x Si y P 3-y O 12

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lim Sungjin
• Jeong Huisu
• Kim Kyounghwan
• Park Hwiyeol
• Shon Jeongkuk
• Yang Wooyoung
• Lee Jaemyung
• Lee Junhyeong
• Heo Jin S

Classifications

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0472 Primary

  Vertically superposed cells with vertically disposed plates · CPC title

• H01M10/0562

  Solid materials · CPC title