Positivelektrodenaktivmaterial und Positivelektrode und Lithiumsekundärbatterie damit

Details

Veröffentlichungs-Nr.

EP4769547

Anmeldetag

20. Dezember 2024

Veröffentlichung

26. Juni 2025

Rechtsraum

EP

Abstract

The present invention relates to a positive electrode active material including a single-particle type lithium nickel-based oxide represented by [Formula 1] below, and a coating layer disposed on a surface of the single-particle type lithium nickel-based oxide, and the positive electrode active material has a RPI₂/RPI₁ of 1 to 1.3, which is a ratio of RPI₂ defined by Equation 2 below to RPI₁ defined by Equation 1 below. [Formula 1] Li_x[Ni_aCo_bM¹_cM²_d]O₂where, in Formula 1 above, M¹ is Mn, Al, or a combination thereof, M² includes one or more selected from the group consisting of Ti, Mg, Zr, Y, Ba, Ca, Sr, W, Ta, Nb, and Mo, and x, a, b, c, and d satisfy 0.9≤x≤1.1, 0.8≤a<1, 0<b<0.2, 0<c<0.2, and 0≤d<0.1: RPI1=I2/I1RPI2=I3/I1where in Equations 1 and 2 above, I₁, I₂ and I₃ are values obtained by measuring intensity in X-ray diffraction patterns after manufacturing an electrode including the positive electrode active material, I₁ is a minimum peak intensity value appearing in a region of 2θ=37° to 38°, I₂ is an average peak intensity value appearing in a region of 2θ=37.3° to 37.5°, and I₃ is an average peak intensity value appearing in a region of 2θ=37.0° to 37.2°.

Anmelder

Firma

LG Energy Solution, Ltd.

Land

🇰🇷 Südkorea