Cathode and lithium battery using the same

Patent metadata

Field	Value
Publication number	US-10326160-B2
Application number	US-201213653702-A
Country	US
Kind code	B2
Filing date	Oct 17, 2012
Priority date	Nov 18, 2011
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A cathode and a battery including a cathode active material including a layer-structured material having a composition of xLi2MO3-(1-x)LiMeO2; and a metal oxide having a perovskite structure. The cathode active material may have improved structural stability by intermixing a metal oxide having a similar crystalline structure with the layer-structured material, and thus, life and capacity characteristics of a cathode and a lithium battery including the metal oxide may be improved.

First claim

What is claimed is:

1. A lithium battery comprising:
an anode;
an organic electrolyte solution; and
a cathode comprising a cathode active material formed on a surface of a current collector, wherein the cathode active material comprises:
a layer-structured material having a composition of xLi 2 MO 3 -(1-x)LiMeO 2 , wherein 0<x <1, and M and Me are each a metal ion; and
a metal oxide having a perovskite structure, wherein the metal oxide has a composition of ABO 3 ; wherein A includes one or more of Group 2 elements or rare earth elements; wherein A is at least one of lanthanum, strontium, barium, or calcium; and wherein B includes one or more transition metals; and wherein B includes one or more elements selected from the group consisting of V, Cr, Mg, and Cu.

2. The lithium battery of claim 1 , wherein Me is one or more transition metals.

3. The lithium battery of claim 1 , wherein M is one or more of aluminum (Al), gallium (Ga), germanium (Ge), magnesium (Mg), niobium (Nb), zinc (Zn), cadmium (Cd), titanium (Ti), cobalt (Co), nickel (Ni), potassium (K), sodium (Na), calcium (Ca), silicon (Si), iron (Fe), copper (Cu), tin (Sn), vanadium (V), boron (B), phosphorus (P), selenium (Se), bismuth (Bi), arsenic (As), zirconium (Zr), manganese (Mn), chromium (Cr), strontium (Sr), scandium (Sc), yttrium (Y), or rare earth elements.

4. The lithium battery of claim 1 , wherein the metal oxide is at least one from LaMgO 3 , SrMgO 3 , BaMgO 3 , and CaMgO 3 .

5. The lithium battery of claim 1 , wherein the metal oxide has a concentration of about 0.01 mol % to about 1 mol % based on 1 mol of the layer-structured material.

6. The lithium battery of claim 1 , wherein A and B are each a metal ion.

7. The lithium battery of claim 1 , wherein the layer-structured material and the metal oxide form a complex.

8. The lithium battery of claim 1 , wherein the metal oxide is intermixed in a crystalline structure of the layer-structured material.

Assignees

• Kim Myung Hoon
• Park Kyu Sung
• Park Min Sik
• Park Jin Hwan
• Samsung Electronics Co Ltd

Inventors

• Kim Myung-Hoon
• Park Kyu-Sung
• Park Min-Sik
• Park Jin-Hwan

Classifications

• 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

• C01G53/70

  containing rare earths, e.g. LaNiO3  (C01G53/68 takes precedence) · CPC title

• H01M4/505

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

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• H01M4/364

  as mixtures · CPC title