US 2022/0033275 A1 · PRECURSOR FOR LITHIUM SECONDARY BATTERY POSITIVE ELECTRODE ACTIVE MATERIALS, METHOD FOR PRODUCING PRECURSOR FOR LITHIUM SECONDARY BATTERY POSITIVE ELECTRODE ACTIVE MATERIALS, AND METHOD FOR PRODUCING LITHIUM COMPOSITE METAL COMPOUND

Abstract

A precursor for lithium secondary battery positive electrode active materials containing at least nickel, in which the following formula (1) is satisfied. 0.20≤Dmin/Dmax (1) (in the formula (1), Dmin is a minimum particle diameter (μm) in a cumulative particle size distribution curve obtained by measuring the precursor for lithium secondary battery positive electrode active materials with a laser diffraction-type particle size distribution measuring instrument, and Dmax is a maximum particle diameter (μm) in the cumulative particle size distribution curve obtained by the measurement with the laser diffraction-type particle size distribution measuring instrument.)

Claims28

Dependent claims

A precursor for lithium secondary battery positive electrode active materials, comprising at least:

nickel,
wherein the following formula (1) is satisfied,
0.20≤Dmin/Dmax (1)
(in the formula (1), Dmin is a minimum particle diameter (μm) in a cumulative particle size distribution curve obtained by measuring the precursor for lithium secondary battery positive electrode active materials with a laser diffraction-type particle size distribution measuring instrument, and Dmax is a maximum particle diameter (μm) in the cumulative particle size distribution curve obtained by the measurement with the laser diffraction-type particle size distribution measuring instrument).

1 more element

A method for producing a precursor for lithium secondary battery positive electrode active materials, comprising:

a slurry preparation step of supplying a metal-containing aqueous solution containing at least nickel and an alkaline aqueous solution to a reaction vessel to obtain a hydroxide-containing slurry;
and
a classification step of classifying the hydroxide-containing slurry with a liquid cyclone-type classification device,
wherein the classification step is carried out under a condition that a classification device inlet pressure is 0.01 MPa or more and 0.07 MPa or less.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/298,815Filed 6 Dec 2019

Priority

JP 2018-2303517 Dec 2018

Published

3 Feb 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C01G 53/84
Compounds containing nickel, with or without oxygen or hydrogen, and containing one or more other elements: hydroxides
C01G 53/42
Complex oxides containing nickel and at least one other metal element: containing alkali metals, e.g. LiNiO2
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.…
H01M 10/0525
Li-accumulators: rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries

Precursor for lithium secondary battery positive electrode active materials, method for producing precursor for lithium secondary battery positive electrode active materials, and method for producing lithium composite metal compound

Life of this patent

Precursor for lithium secondary battery positive electrode active materials, method for producing precursor for lithium secondary battery positive electrode active materials, and method for producing lithium composite metal compound

Life of this patent

Abstract

Claims28