非水電解質二次電池用正極活物質、非水電解質二次電池用正極活物質の製造方法、及び非水電解質二次電池

Title:

非水電解質二次電池用正極活物質、非水電解質二次電池用正極活物質の製造方法、及び非水電解質二次電池

Document Type and Number:

Japanese Patent JP7182107

Kind Code:

B2

Abstract:

A positive electrode active material which predominantly includes lithium transition metal composite oxide particles containing Ni and Al, and which has a low charge transfer resistance and thus allows the battery capacity to be increased. The composite oxide particles contain 5 mol % or more Al relative to the total molar amount of metal elements except Li, include a particle core portion and an Al rich region on or near the surface of the composite oxide particle wherein the Al concentration in the particle core portion is not less than 3 mol % and the Al concentration in the Al rich region is 1.3 times or more greater than the Al concentration in the particle core portion. The composite oxide particles contain 0.04 mol % or more sulfate ions relative to the total molar amount of the particles.

Inventors:

Takaya Masuo
Takeshi Ogasawara

Application Number:

JP2019532490A

Publication Date:

December 02, 2022

Filing Date:

July 10, 2018

Export Citation:

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