Method of manufacturing electrode for lithium secondary battery and electrode manufactured using the same

Patent metadata

Field	Value
Publication number	US-10026952-B2
Application number	US-201414457197-A
Country	US
Kind code	B2
Filing date	Aug 12, 2014
Priority date	Apr 16, 2012
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

Disclosed are a method of manufacturing an electrode for secondary batteries that includes surface-treating a current collector so as to have a morphology wherein a surface roughness Ra of 0.001 μm to 10 μm is formed over the entire surface thereof, wherein the surface-treating is performed by chemical or electrical etching using a wet method or by reactive gas or ion etching using a dry method to enhance adhesion between an electrode active material and the current collector and an electrode for secondary batteries that is manufactured using the method.

First claim

The invention claimed is:

1. A method of manufacturing an electrode for secondary batteries, the method comprising preparing an electrode mixture in the form of a slurry by mixing an electrode active material comprising a lithium metal oxide represented by Formula 1 below:
Li x Ni y Mn 2−y O 4   (1)

wherein 0.9≤x≤1.2, 0.4<y<0.5,
a conductive material, a binder and an organic solvent, surface-treating a current collector so as to have a morphology wherein a surface roughness R a of 0.1 μm to 1 μm is formed over an entire surface thereof, wherein the surface-treating is performed by chemical etching using a mixture of FeCl3/HCl/H2O as an etchant to enhance adhesion between the electrode active material and the current collector, and coating the slurry onto the surface-treated surface of the current collector.

2. An electrode for a secondary battery, manufactured using the method according to claim 1 .

3. The method according to claim 1 , wherein the lithium metal oxide for the electrode active material is LiNi 0.5 Mn 1.5 O 4 or LiNi 0.4 Mn 1.6 O 4 .

4. The method according to claim 1 , wherein the lithium metal oxide for the electrode active material is Li 1.33 Ti 1.67 O 4 or LiTi 2 O 4 .

5. A secondary battery comprising the electrode according to claim 2 .

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

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

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

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

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

Assignees

• Lg Chemical Ltd

Inventors

• Kim Daehong
• Lee Seong Min
• Lee Min Hee

Classifications

• H01M4/505

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

• H01M4/0404 Primary

  by coating on electrode collectors · CPC title

• H01M4/139 Primary

  Processes of manufacture · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M4/70

  characterised by shape or form · CPC title