US 7,998,620 B2 · Positive electrode active material for non-aqueous electrolyte secondary battery and method for producing the same, and non-aqueous electrolyte secondary battery using positive electrode active material

Abstract

An object of the present invention is to provide a positive electrode active material for a non-aqueous electrolyte secondary battery, which can solve the problem that the capacity remarkably decreases with an increase of the number of charging and discharging cycles in a high capacity non-aqueous electrolyte secondary battery using a positive electrode active material for a non-aqueous electrolyte secondary battery made of particles of an alkali metal composite oxide containing nickel. A positive electrode active material for a non-aqueous electrolyte secondary battery, comprising a nickel-alkali metal-containing composite oxide having cracks on the surface of primary particles is used.

Claims3

Dependent claims

A positive electrode active material for a non-aqueous electrolyte secondary battery, comprising a nickel-alkali metal-containing composite oxide having cracks on the surface of primary particles, wherein the composition of the nickel-alkali metal-containing composite oxide is represented by the following general formula (I):

Liw-xNaxNi1-y-zMnyMezO2 (1)
wherein, in the formula (I), w satisfies the following relation:
0.9≦w≦1.1, x satisfies the following relation:
0<x≦0.05, y satisfies the following relation:
0=y, z satisfies the following relation:
0<z≦0.34, and Me represents Al, and wherein the primary particles have an average particle size of from 1 to 50 μm.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/943,651Filed 21 Nov 2007

Priority

JP 2006-31618522 Nov 2006

Published

US 2008/0118829 A122 May 2008

Granted

16 Aug 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 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 45/1228
Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof: of the type -, e.g. LiMnO2 or LiO2
C01G 53/42
Complex oxides containing nickel and at least one other metal element: containing alkali metals, e.g. LiNiO2
C01G 53/51
Of the type n-, e.g. LiO2 or LiO2: containing sodium

Positive electrode active material for non-aqueous electrolyte secondary battery and method for producing the same, and non-aqueous electrolyte secondary battery using positive electrode active material

Life of this patent

Positive electrode active material for non-aqueous electrolyte secondary battery and method for producing the same, and non-aqueous electrolyte secondary battery using positive electrode active material

Life of this patent

Abstract

Claims3