Electrode for secondary battery and secondary battery including the same

Patent metadata

Field	Value
Publication number	US-2017005323-A1
Application number	US-201615266428-A
Country	US
Kind code	A1
Filing date	Sep 15, 2016
Priority date	Apr 18, 2012
Publication date	Jan 5, 2017
Grant date	—

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

1 . (canceled)

2 . 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 5 to 10% 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.

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

4 . A secondary battery comprising the cathode according to claim 2 .

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

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

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

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

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

10 . The secondary battery according to claim 4 , 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.

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

12 . 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), 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.

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

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

15 . The cathode according to claim 12 , wherein the oxide is LiNi 0.5 Mn 1.5 O 4 or LiNi 0.4 Mn 1.6 O 4 .

16 . A secondary battery comprising the cathode according to claim 12 .

17 . A battery module comprising the secondary battery according to claim 16 as a unit battery.

18 . A battery pack comprising the battery module according to claim 17 .

19 . A device comprising the battery pack according to claim 18 , wherein the device is an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a system for storing power.

20 . The secondary battery according to claim 16 , 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.

21 . The secondary battery according to claim 20 , wherein the oxide of Formula 4 is Li 1.33 Ti 1.67 O 4 or LiTi 2 O 4 .

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/131 Primary

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/623

  fluorinated polymers · CPC title

• H01M4/625

  Carbon or graphite · CPC title