US 12,651,746 B2 · Positive electrode active material, method for manufacturing the same, and secondary battery

Abstract

An object is to provide a method for manufacturing a positive electrode active material that achieves high powder properties and high load resistance (e.g., rate performance and output resistance) when used in a lithium-ion secondary battery, within a short manufacturing cycle time and at low cost. To perform heat treatment at temperatures lower than the melting point of magnesium fluorine, lithium fluoride is mixed to melt magnesium fluorine and modify the surface of lithium cobalt oxide powder. By mixing lithium fluoride, magnesium fluorine can be melted at a temperature lower than its melting point, and a positive electrode active material is formed utilizing this eutectic phenomenon.

Claims9

Dependent claims

A method for manufacturing a positive electrode active material, comprising:

pulverizing each of magnesium fluoride, lithium fluoride, a nickel source, and an aluminum source;
after the pulverizing, forming a mixture by mixing the pulverized magnesium fluoride, the pulverized lithium fluoride, the pulverized nickel source, the pulverized aluminum source, and a powder of lithium cobalt oxide;
and
forming the positive electrode active material by heating the mixture at a temperature lower than an upper temperature limit of the lithium cobalt oxide.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/312,082Filed 2 Dec 2019

Priority

JP 2018-23392813 Dec 2018

Published

US 2022/0029159 A127 Jan 2022

Granted

9 Jun 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification24 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 53/42
Complex oxides containing nickel and at least one other metal element: containing alkali metals, e.g. LiNiO2
H01G 11/46
Characterised by their material: metal oxides
H01G 11/86
Processes for the manufacture of hybrid or EDL capacitors, or components thereof: specially adapted for electrodes

Positive electrode active material, method for manufacturing the same, and secondary battery

Life of this patent

Positive electrode active material, method for manufacturing the same, and secondary battery

Life of this patent

Abstract

Claims9