ELECTRODE FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME

• US 20150064556A1
• Filed: 01/17/2014
• Published: 03/05/2015
• Est. Priority Date: 09/03/2013
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: LEE, Jin-Hyon, SOHN, Ju-Hee, LEE, Jong-Ki, PARK, Sang-In, WON, Jung-Yeon, GOH, Eun-Young
• Granted Patent: US 9,905,854 B2
• Time in Patent Office: Days
• US Class Current: 429/219
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/139 Processes of manufacture
• CPC Class Codes: H01M 4/366 as layered products
• CPC Class Codes: H01M 4/62 Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• CPC Class Codes: H01M 4/625 Carbon or graphite
• CPC Class Codes: H01M 50/609 Arrangements or processes for filling with liquid, e.g. electrolytes
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An electrode for a rechargeable battery and a rechargeable battery, the electrode including a current collector; an electrode active material layer; and an electrolyte solution impregnation layer, wherein the electrolyte solution impregnation layer includes a metal oxide and a conductive material.

Claims

1. An electrode for a rechargeable battery, the electrode comprising:

a current collector;

an electrode active material layer; and

an electrolyte solution impregnation layer, wherein the electrolyte solution impregnation layer includes a metal oxide and a conductive material.

2. The electrode as claimed in claim 1, wherein the electrolyte solution impregnation layer is closer to the current collector than an external surface of the electrode.

3. The electrode as claimed in claim 1, wherein the electrode active material layer includes a first electrode active material layer and a second electrode active material layer, the electrolyte solution impregnation layer being between the first electrode active material layer and the second electrode active material layer.

4. The electrode as claimed in claim 3, wherein the first electrode active material layer is between the current collector and the electrolyte solution impregnation layer.

5. The electrode as claimed in claim 3, wherein the first electrode active material layer has a thickness that is smaller than a thickness of the second electrode active material layer.

6. The electrode as claimed in claim 1, wherein the conductive material is on a surface of the metal oxide.

7. The electrode as claimed in claim 6, wherein the conductive material surrounds at least a part of the surface of the metal oxide.

8. The electrode as claimed in claim 1, wherein the metal oxide includes Al₂O₃, TiO₂, CeO₂, ZnO₂, ZrO₂, V₂O₅, HfO₂, MnO₂, MgO, WO₂, or a combination thereof.

9. The electrode as claimed in claim 1, wherein the conductive material includes a carbon-based material, a metal, or a combination thereof.

10. The electrode as claimed in claim 9, wherein the conductive material includes the carbon-based material, the carbon based material including a carbon nanotube, a carbon nanofiber, carbon black, acetylene black, ketjen black, graphene, or a combination thereof.

11. The electrode as claimed in claim 9, wherein the conductive material includes the metal, the metal including copper, aluminum, nickel, silver, gold, or a combination thereof.

12. The electrode as claimed in claim 1, wherein the conductive material is included in the electrolyte solution impregnation layer in an amount of about 5 parts by weight to about 30 parts by weight, based on 100 parts by weight of the metal oxide.

13. The electrode as claimed in claim 1, wherein a thickness of the electrolyte solution impregnation layer is about 0.2% to about 20% of a total thickness of the electrode.

14. The electrode as claimed in claim 1, wherein a total thickness of the active material layer and the electrolyte solution impregnation layer is about 50 μ

m to about 300 μ

m.

15. The electrode as claimed in claim 1, wherein the electrolyte solution impregnation layer is different from the active material layer.

16. The electrode as claimed in claim 1, wherein the metal oxide is different from the conductive material.

17. The electrode as claimed in claim 1, wherein:

the metal oxide provides a pathway for movement of lithium ions, and

the conductive material provides a pathway for movement of electrons.

18. A rechargeable battery, comprising an electrode assembly, the electrode assembly including:

a first electrode,

a second electrode, and

a separator between the first electrode and the second electrode,

wherein;

at least one of the first electrode or second electrode includes a current collector, an electrode active material layer, and an electrolyte solution impregnation layer, and

the electrolyte solution impregnation layer includes a metal oxide and a conductive material.

19. The rechargeable battery as claimed in claim 18, wherein the electrolyte solution impregnation layer is closer to the current collector than an external surface of the at least one of the first electrode or the second electrode.

20. The rechargeable battery as claimed in claim 18, wherein the electrode active material layer includes a first electrode active material layer and a second electrode active material layer, the electrolyte solution impregnation layer being between the first electrode active material layer and the second electrode active material layer.