Positivelektrodenaktivmaterial, Positivelektrode und Sekundärbatterie

Details

Veröffentlichungs-Nr.

EP4811455

Anmeldetag

25. Februar 2026

Veröffentlichung

23. September 2026

Rechtsraum

EP

Abstract

A positive electrode active material that can make the moisture absorption of a positive electrode small in the storage and that enables a secondary battery to have high volumetric energy density is provided. The positive electrode active material according to the present disclosure includes first lithium composite oxide particles in a single particle form, and second lithium composite oxide particles in a secondary particle form. In a volume-based particle size distribution obtained in accordance with a laser diffraction/scattering method, when the particle diameter at which the cumulative frequency becomes 10% is defined as 10% particle diameter (D10), the particle diameter at which the cumulative frequency becomes 50% is defined as 50% particle diameter (D50), and the particle diameter at which the cumulative frequency becomes 90% is defined as 90% particle diameter (D90), the 50% particle diameter (D50) of the first lithium composite oxide particles is smaller than the 50% particle diameter (D50) of the second lithium composite oxide particles and a particle size distribution width expressed by (D90 - D10)/D50 of the first lithium composite oxide particles is 1.20 or less. The particle breaking strength of the second lithium composite oxide particles is 200 MPa or less.

Anmelder

Firma

Prime Planet Energy & Solutions, Inc.

Land

🇯🇵 Japan