Negative electrode for secondary lithium battery, and secondary lithium battery

Patent metadata

Field	Value
Publication number	US-9525175-B2
Application number	US-94776610-A
Country	US
Kind code	B2
Filing date	Nov 16, 2010
Priority date	May 25, 2010
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

Disclosed is a negative electrode for a secondary lithium battery and a secondary lithium battery including the same, wherein the negative electrode includes a current collector and a negative active material layer formed on the current collector, and the negative active material layer includes an additive including a core including a metal oxide and a metal coating layer formed on the core, and a negative active material.

First claim

What is claimed is:

1. A negative electrode for a secondary lithium battery, comprising:
a current collector; and
a negative active material layer formed on the current collector,
wherein the negative active material layer comprises an additive and a negative active material, and
wherein the additive comprises a metal oxide core uniformly coated with a metal coating layer;
wherein the metal coating layer is included at from about 20 wt % to about 70 wt % based on the total weight of the additive.

2. The negative electrode for a secondary lithium battery of claim 1 , wherein the metal coating layer comprises a metal selected from the group consisting of Ni, Cu, Mn, Co, Fe, and a combination thereof.

3. The negative electrode for a secondary lithium battery of claim 1 , wherein the metal coating layer has a thickness of from about 1 nm to about 100 nm.

4. The negative electrode for a secondary lithium battery of claim 1 , wherein the core has a specific surface area of from about 50 m2/g to about 1000 m2/g.

5. The negative electrode for a secondary lithium battery of claim 1 , wherein the metal oxide is selected from the group consisting of SiO 2 , Al 2 O 3 , VO 2 , SrO 2 , Y 2 O 3 , ZrO 2 , CeO 2 , MgO, Ce 2 O 3 , and a combination thereof.

6. The negative electrode for a secondary lithium battery of claim 1 , wherein the additive is included at from about 1 wt % to about 30 wt % based on the total weight of the negative active material layer.

7. The negative electrode for a secondary lithium battery of claim 1 , wherein the additive further comprises a carbon coating layer formed on the surface of the metal coating layer.

8. The negative electrode for a secondary lithium battery of claim 7 , wherein the carbon coating layer comprises a material selected from the group consisting of citric acid, sucrose, dihydroxy naphthalene, phenol resin, polyvinylchloride, and a combination thereof.

9. The negative electrode for a secondary lithium battery of claim 7 , wherein the carbon coating layer has a thickness of from about 1 nm to about 10 nm.

10. The negative electrode for a secondary lithium battery of claim 7 , wherein the carbon coating layer is included at from about 1 part by weight to about 20 parts by weight based on 100 parts by weight of the additive.

11. A secondary lithium battery comprising:
a negative electrode comprising a current collector; and a negative active material layer formed on the current collector, wherein the negative active material layer comprises an additive and a negative active material, and wherein the additive comprises a core comprising a metal oxide and a metal coating layer formed uniformly on core;
a positive electrode comprising a positive active material; and
a non-aqueous electrolyte;
wherein the metal coating layer is included at from about 20 wt % to about 70 wt % based on the total weight of the additive.

12. The secondary lithium battery of claim 11 , wherein the metal coating layer comprises a metal selected from the group consisting of Ni, Cu, Mn, Co, Fe, and a combination thereof.

13. The secondary lithium battery of claim 11 , wherein the metal coating layer has a thickness of from about 1 nm to about 100 nm.

14. The secondary lithium battery of claim 11 , wherein the core has a specific surface area of from about 50 m.sup.2/g to about 1000m.sup.2/g.

15. The secondary lithium battery of claim 11 , wherein the metal oxide is selected from the group consisting of SiO 2 , Al 2 O 3 , VO 2 , SrO 2 , Y 2 O 3 , ZrO 2 , CeO 2 , MgO, Ce 2 O 3 , and a combination thereof.

16. The secondary lithium battery of claim 11 , wherein the additive is included at from about 1 wt % to about 30 wt % based on the total weight of the negative active material layer.

17. The secondary lithium battery of claim 11 , wherein the additive further comprises a carbon coating layer formed on the surface of the metal coating layer.

18. The secondary lithium battery of claim 17 , wherein the carbon coating layer has a thickness of from about 1 nm to about 10 nm.

Assignees

• Ka Bok-Hyun
• Sheem Kyeu-Yoon
• Han Da-Woon
• Samsung Sdi Co Ltd

Inventors

• Ka Bok-Hyun
• Sheem Kyeu-Yoon
• Han Da-Woon

Classifications

• H01M4/62 Primary

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/134

  Electrodes based on metals, Si or alloys · CPC title

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M10/052

  Li-accumulators · CPC title

• Y02E60/122

  Cross-Sectional Technologies · mapped topic