Positivelektrodenaktivmaterial und Herstellungsverfahren dafür

Details

Veröffentlichungs-Nr.

EP4718527

Anmeldetag

3. Juli 2024

Veröffentlichung

9. Januar 2025

Rechtsraum

EP

Abstract

The present invention relates to a positive electrode active material which may consequently improve performance of a battery including the same by improving performance and stability of a lithium-rich oxide, wherein the present invention relates to a positive electrode active material which includes a layer-structured lithium-rich transition metal oxide including both a Li<2>MnO<3> phase and a LiMO<2> phase (where M is an element including at least one selected from nickel (Ni), cobalt (Co), and manganese (Mn)); and a coating layer including boron and carbon which is formed on the lithium-rich transition metal oxide, and satisfies at least one of conditions (1) to (3), a method of preparing the same, and a positive electrode and a lithium secondary battery which include the same. - Condition (1): An atomic ratio (B/Mn) of boron (B) to manganese (Mn) present on a surface, which is analyzed by X-ray photoelectron spectroscopy (XPS), is in a range of 1 to 5 - Condition (2): An intensity ratio (I<Carbonate,1>:I<C-C>) of a peak (I<Carbonate,1>) at 287.5 eV to 288.5 eV to a peak (I<C-C>) at 284 eV to 285 eV in an XPS spectrum of the surface is in a range of 0.05:1 to 0.15:1 - Condition (3): An intensity ratio (I<Carbonate,2>:I<C-C>) of a peak (I<Carbonate,2>) at 288.6 eV to 290.5 eV to the peak (I<C-C>) at 284 eV to 285 eV in the XPS spectrum of the surface is in a range of 0.05:1 to 0.15:1

Anmelder

Firma

LG Chem, Ltd.

Land

🇰🇷 Südkorea