Anode and lithium battery including anode

Patent metadata

Field	Value
Publication number	US-9029014-B2
Application number	US-201113067982-A
Country	US
Kind code	B2
Filing date	Jul 13, 2011
Priority date	Nov 2, 2010
Publication date	May 12, 2015
Grant date	May 12, 2015

Abstract

An anode includes an anode active material including a lithium titanium oxide, a binder, and 0 to about 2 parts by weight of a carbon-based conductive agent based on 100 parts by weight of the lithium titanium oxide.

First claim

What is claimed is:

1. An anode, comprising:
an anode active material including a lithium titanium oxide;
a binder; and
greater than 0 parts by weight to 1 parts by weight of a carbon-based conductive agent based on 100 parts by weight of the lithium titanium oxide, wherein the carbon-based conductive agent includes carbon black,
wherein the lithium titanium oxide is represented by Formula 1 below:
Li 4+x Ti 5−y M z O 12−n ,  <Formula 1>

where −0.2≦x≦0.2, −0.3≦y≦0.3, 0≦z≦0.3, −0.3≦n<0.3, and
M comprises at least one of lithium (Li), magnesium (Mg), aluminium (Al), calcium (Ca), strontium (Sr), chromium (Cr), vanadium (V), iron (Fe), cobalt (Co), nickel (Ni), zirconium (Zr), zinc (Zn), silicon (Si), yttrium (Y), niobium (Nb), gallium (Ga), tin (Sn), molybdenum (Mo), tungsten (W), barium (Ba), lanthanum (La), cerium (Ce), silver (Ag), tantalum (Ta), hafnium (Hf), ruthenium (Ru), bismuth (Bi), antimony (Sb), and arsenic (As).

2. The anode of claim 1 , wherein the carbon-based conductive agent further comprises at least one of carbon fiber or graphite.

3. The anode of claim 1 , further comprising other conductive agents, the other conductive agents being different from the carbon-based conductive agent and including at least one of a metallic fiber, a non-metallic powder, a metallic powder, a conductive whisker, a conductive metal oxide, and a polyphenylene derivative.

4. The anode of claim 1 , wherein a ratio [(I(D)+I(G))/I(F2g)] is 0 to about 0.44, where I(D) is a peak intensity of a D band on a Raman spectra of the anode at a Raman shift of 1300 to 1400 cm −1 , I(G) is a peak intensity of a G band on the Raman spectra of the anode at a Raman shift 1500 to 1700 cm −1 , and I(F2g) is a peak intensity of a F2g oscillation mode having a spinel structure on the Raman spectra at a Raman shift of 200 to 300 cm −1 .

5. A lithium battery comprising an anode of claim 1 .

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

7. The anode of claim 1 , wherein an amount of the carbon-based conductive agent is greater than 0 parts by weight to 0.5 parts by weight, based on 100 parts by weight of the lithium titanium oxide.

Assignees

• Song Min-Sang
• Park Kyu-Sung
• Kim Gue-Sung
• Song Soo-An
• Kim Jae-Hyung
• Eom Ji-Yong
• Baek Seung-Goo
• Samsung Sdi Co Ltd

Inventors

• Song Min-Sang
• Park Kyu-Sung
• Kim Gue-Sung
• Song Soo-An
• Kim Jae-Hyung
• Eom Ji-Yong
• Baek Seung-Goo

Classifications

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• Y02E60/122

  Cross-Sectional Technologies · mapped topic

• 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

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• C01P2006/40

  Electric properties · CPC title