US 9,005,813 B2 · Negative electrode active material, method for preparing the same and lithium secondary battery including negative electrode active material

Abstract

A negative electrode active material, a method of preparing the negative electrode active material and a lithium secondary battery including the negative electrode active material are disclosed. A negative electrode active material includes a lithium titanate, wherein a portion of lithium of the lithium titanate is substituted by at least one selected from the group consisting of Sr, Ba, a mixture thereof and an alloy thereof, and thus a lithium secondary battery including the negative electrode active material may improve high-rate discharge characteristics.

Claims10

Dependent claims

A negative active material for a secondary lithium battery comprising lithium titanate,

wherein a portion of the lithium in the lithium titanate is substituted by at least one selected from the group consisting of strontium (Sr), barium (Ba), a mixture thereof and an alloy thereof,
wherein the peak of the surface (111) of the lithium titanate is in a region with a Bragg angle 2θ of 18.7°±about 0.2°;
wherein the lithium titanate is represented by Formula 1:
Li4-xMxTi5O12,
wherein 0<x<0.6 and M is at least one selected from the group consisting of Sr, Ba, a mixture thereof and an alloy thereof.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/365,184Filed 2 Feb 2012 · us provisional application

Priority

5 Apr 2011

Published

US 2012/0258368 A111 Oct 2012

Granted

14 Apr 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

H01M 4/485
Of inorganic oxides or hydroxides: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
C01G 23/003
Compounds of titanium: titanates
C01P 2002/72
Defined by measured X-ray, neutron or electron diffraction data: by d-values or two theta-values, e.g. as X-ray diagram
C01P 2002/74
Defined by measured X-ray, neutron or electron diffraction data: by peak-intensities or a ratio thereof only

Negative electrode active material, method for preparing the same and lithium secondary battery including negative electrode active material

Life of this patent

Negative electrode active material, method for preparing the same and lithium secondary battery including negative electrode active material

Life of this patent

Abstract

Claims10