Moisture-limited electrode active material, moisture-limited electrode and lithium secondary battery comprising the same

Patent metadata

Field	Value
Publication number	US-11024845-B2
Application number	US-201313863623-A
Country	US
Kind code	B2
Filing date	Apr 16, 2013
Priority date	Apr 16, 2012
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

Disclosed are an electrode active material containing moisture in an amount less than 2,000 ppm per 1 g of lithium metal oxide or moisture in an amount less than 7,000 ppm per 1 cm3 of the lithium metal oxide, and an electrode containing moisture in an amount less than 2,000 ppm per 1 cm3 of an electrode mix.

First claim

The invention claimed is:

1. An electrode mix comprising:
a binder; and
an anode active material containing (a) moisture that is equal to or greater than 900 ppm and is lower than 2,000 ppm with respect to the anode active material and (b) a lithium titanium oxide that is represented by the following Formula Li a Ti b O 4 , in which 0.5≤a≤3 and 1≤b≤2.5.

2. The electrode mix according to claim 1 , wherein the moisture contained in the anode active material is equal to or greater than 900 ppm and is lower than 1,500 ppm.

3. The electrode mix according to claim 1 , further comprising a conductive material.

4. The electrode mix according to claim 1 , wherein the lithium titanium oxide is Li 1.33 Ti 1.67 O 4 or LiTi 2 O 4 .

5. The electrode mix according to claim 1 , wherein the lithium titanium oxide is provided as a secondary particle formed of agglomerated primary particles.

6. The electrode mix according to claim 5 , wherein the secondary particle has a particle diameter of 200 nm to 30 μm.

7. An electrode mix comprising:
a conductive material; and
an anode active material containing (a) moisture that is equal to or greater than 900 ppm and is lower than 2,000 ppm with respect to the anode active material and (b) a lithium titanium oxide that is represented by the following Formula Li a Ti b O 4 , in which 0.5≤a≤3 and 1≤b≤2.5.

8. The electrode mix according to claim 7 , further comprising a binder.

9. An anode slurry prepared by mixing the electrode mix of claim 8 with a solvent.

10. An anode electrode prepared from the slurry of claim 9 .

11. An anode slurry prepared by mixing the electrode mix of claim 3 with a solvent.

12. An anode electrode prepared from the slurry of claim 11 .

Assignees

• Lg Chemical Ltd

Inventors

• Lee Younkyoung
• Lee Seongmin
• Kim Jihyun
• Lim Soohyun
• Lee Jae Hyun
• Jeon Jong Ho

Classifications

• H01M4/485 Primary

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

• H01M4/131

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

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M4/621

  Binders · CPC title