Positivelektrodenaktivmaterial für eine Wiederaufladbare Lithiumbatterie und Verfahren zur Herstellung davon

Details

Veröffentlichungs-Nr.

EP4714906

Anmeldetag

3. September 2025

Veröffentlichung

25. März 2026

Rechtsraum

EP

Abstract

The present application relates to a positive electrode active material for a rechargeable lithium battery, and a method for preparing a positive electrode active material for a rechargeable lithium battery, the positive electrode active material including: a core particle comprising a lithium nickel-based composite oxide represented by Chemical Formula 11; and a coating layer located on a surface of the core particle and comprising one element or a combination thereof selected from the group consisting of Al, B, Ba, Ca, Ce, Co, Cr, Cu, Fe, Mg, Mn, Mo, Nb, Si, Sn, Sr, Ti, V, W, Y, Zn, and Zr, wherein the positive electrode active material has a value defined by Mathematical Formula 1 of greater than or equal to about 5. Chemical Formula 11 Li_a11Ni_x11M¹¹_y11M¹²_z11O_2-b11X_b11wherein, in Chemical Formula 11, 0.9≤a11≤1.2, 0.3≤x11<1, 0<y11≤0.7, 0≤z11≤0.7, 0.9≤x11+y11+z11≤1.1, and 0≤b11≤0.11, M¹¹ and M¹² are each independently one or more elements selected from Al, B, Ba, Ca, Ce, Co, Cr, Cu, Fe, Mg, Mn, Mo, Nb, Si, Sn, Sr, Ti, V, W, Y, Zn, and Zr, and X is one or more elements selected from F, P, and S, ∑MxEP-EDS/MxICPwherein Mx denotes a metal component contained in the coating layer, Mx (EP-EDS) denotes a mol% of the metal component Mx relative to total metals excluding lithium, present on the surface of the positive electrode active material as measured by Electron Probe - Energy Dispersive Spectroscopy (EP-EDS), and Mx (ICP) denotes a mol% of the metal component Mx relative to total metals excluding lithium, present in the entirety (surface and core) of the positive electrode active material as measured by Inductively Coupled Plasma analysis.

Anmelder

Firma

SAMSUNG SDI CO., LTD.

Land

🇰🇷 Südkorea