Positive electrode active material for rechargeable lithium battery, manufacturing method of same, and rechargeable lithium battery including same

Patent metadata

Field	Value
Publication number	US-9548491-B2
Application number	US-201514597998-A
Country	US
Kind code	B2
Filing date	Jan 15, 2015
Priority date	Feb 7, 2014
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

Disclosed are a positive active material for a rechargeable lithium battery including a core including a lithium nickel-based oxide, a lithium iron phosphate-based compound, or a combination thereof; and carbon nanotube grown on the surface of the core, and a rechargeable lithium battery including the same.

First claim

What is claimed is:

1. A positive active material for a rechargeable lithium battery, comprising:
a core including a lithium nickel-based oxide, a lithium iron phosphate-based compound, or a combination thereof; and
a carbon nanotube grown on the surface of the core,
wherein the grown carbon nanotube is included in an amount of about 0.1 parts by weight to about 3 parts by weight based on 100 parts by weight of the core, the grown carbon nanotube has a length of about 1 μm to about 10 μm, the grown carbon nanotube has a thickness of about 20 nm to about 50 nm, and the core has an average particle diameter of about 1 μm to about 25 μm.

2. The positive active material for a rechargeable lithium battery of claim 1 , wherein the positive active material has a shape where the grown carbon nanotube surrounds the core.

3. A rechargeable lithium battery, comprising a positive electrode including the positive active material for rechargeable lithium battery according claim 1 ;
a negative electrode; and
an electrolyte.

4. The rechargeable lithium battery of claim 3 , wherein the positive active material has a shape where the grown carbon nanotube surrounds the core.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Cho Chae-Woong
• Han Seung-Hun

Classifications

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · 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

• H01M4/366 Primary

  as layered products · CPC title

• H01M4/1397

  of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• Y02E60/122

  Cross-Sectional Technologies · mapped topic