Electrode for secondary battery and secondary battery including the same

Patent metadata

Field	Value
Publication number	US-10153480-B2
Application number	US-201615266428-A
Country	US
Kind code	B2
Filing date	Sep 15, 2016
Priority date	Apr 18, 2012
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

Disclosed is an electrode for secondary batteries including an electrode mixture including an electrode active material, binder and conductive material coated on a current collector. The present invention provides an electrode for secondary batteries wherein an electrode active material is a cathode active material and/or anode active material, and the conductive material is included in an amount of 0.1 to 15% based on total weight of the electrode mixture, and a secondary battery including the same.

First claim

The invention claimed is:

1. A cathode for a secondary battery comprising a cathode mixture comprising a cathode active material, a binder and a conductive material coated on a current collector,
wherein the cathode active material includes an oxide represented by Formula 3 below, and
the conductive material is a carbon nanotube (CNT) having an average diameter of 5 to 50 nm and a length of 0.5 to 10 μm and the conductive material is included in an amount of 0.1 to 15% based on total weight of the cathode mixture,
Li x Ni y Mn 2−y O 4   (3)

wherein 0.9<x<1.2 and 0.4<y<0.5.

2. The cathode according to claim 1 , wherein the oxide is LiNi 0.5 Mn 1.5 O 4 or LiNi 0.4 Mn 1.6 O 4 .

3. A secondary battery comprising the cathode according to claim 1 .

4. The secondary battery according to claim 3 , wherein the secondary battery is a lithium secondary battery.

5. A battery module comprising the secondary battery according to claim 4 as a unit battery.

6. A battery pack comprising the battery module according to claim 5 .

7. A device comprising the battery pack according to claim 6 .

8. The device according to claim 7 , wherein the device is an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a system for storing power.

9. The secondary battery according to claim 3 , further comprising an anode comprising an anode mixture comprising an anode active material, a binder and a conductive material coated on a current collector, wherein the anode active material includes an oxide represented by Formula 4 below:
Li a Ti b O 4   (4)

wherein 0.1<a<4 and 0.2<b<4.

10. The secondary battery according to claim 9 , wherein the oxide of Formula 4 is Li 1.33 Ti 1.67 O 4 or LiTi 2 O 4 .

11. The cathode according to claim 1 , wherein the conductive material is included in an amount of 1 to 10% based on total weight of the cathode mixture.

12. The cathode according to claim 1 , wherein the conductive material is included in an amount of 5 to 10% based on total weight of the cathode mixture.

Assignees

• Lg Chemical Ltd

Inventors

• Lim Soo Hyun
• Lee Min Hee
• Lee Youn Kyoung
• Kim Daehong
• Lee Jae Hyun
• Park Tae Jin

Classifications

• H01M4/505

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

• Y02E60/122

  Cross-Sectional Technologies · mapped topic

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H01M4/624

  Electric conductive fillers · CPC title

• H01M4/625

  Carbon or graphite · CPC title