US 8,986,571 B2 · Lithium composite compound particles and process for producing the same, and non-aqueous electrolyte secondary battery

Abstract

The present invention aims to provide lithium composite compound particles which can exhibit good cycle characteristics and an excellent high-temperature storage property when used as a positive electrode active substance of a secondary battery, and a secondary battery using the lithium composite compound particles. The present invention relates to lithium composite compound particles having a composition represented by the compositional formula: Li1+xNi1−y−z−aCoyMnzMaO2, in which the lithium composite compound particles have an ionic strength ratio A (LiO−/NiO2−) of not more than 0.5 and an ionic strength ratio B (Li3CO3+/Ni+) of not more than 20 as measured on a surface of the respective lithium composite compound particles using a time-of-flight secondary ion mass spectrometer.

Claims11

Dependent claims

Lithium composite compound particles having a composition represented by the following compositional formula 1, which particles have an ionic strength ratio A (LiO−/NiO2−) of not more than 0.5 and an ionic strength ratio B (Li3CO3+/Ni+) of not more than 20 as measured on a surface of the respective lithium composite compound particles using a time-of-flight secondary ion mass spectrometer:

Li1+xNi1−y−z−aCOyMnzMaO2 Compositional formula 1:
wherein M is at least one element selected from the group consisting of Ti, Bi, Sb, Al and Zr;
and x, y, z and a satisfy −0.02≦x≦0.05, 0<y≦0.40, 0<z≦0.40 and 0≦a≦0.01, respectively.

Dependencies are inferred from the claim text.

Facts

Application

13/702,871Filed 8 Jun 2011

Priority

JP 2010-1323929 Jun 2010

Published

US 2013/0119307 A116 May 2013

Granted

24 Mar 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

H01M 4/525
Of nickel, cobalt or iron: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g.…
C01G 53/504
Containing lithium and cobalt: with the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.5,…
H01M 4/505
Of manganese: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
C01P 2004/03
Depicted by an image: obtained by SEM

Lithium composite compound particles and process for producing the same, and non-aqueous electrolyte secondary battery

Life of this patent

Lithium composite compound particles and process for producing the same, and non-aqueous electrolyte secondary battery

Life of this patent

Abstract

Claims11