High voltage positive electrode active material including lithium manganese-based oxide and method for producing the same

• Main Authors: You, Min Kyu, Yoo, Tae Gu, Han, Gi Beom, Park, Younguk, Jo, Chi Ho, Jung, Wang Mo, Park, Sungbin, Hwang, Jintae, Hur, Hyuck, Ju, Inseong
• Format: Patent
• Language: English
• Published: 07.03.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A positive electrode active material contains a lithium-rich lithium manganese-based oxide, wherein the lithium manganese-based oxide has a composition of the following chemical formula (1), and wherein a lithium ion conductive glass-ceramic solid electrolyte layer containing at least one selected from the group consisting of thio-LISICON(thio-lithium super ionic conductor), LISICON(lithium super ionic conductor), Li2S-SiS2-Li4SiO4, and Li2S-SiS2-P2S5-Lil is formed on the surface of the lithium manganese-based oxide particle:Li1−xMyMn1−x−yO2−zQz  (1)wherein, 0<x≤0.2, 0<y≤0.2, and 0≤z≤0.5;M is at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Ga, In, Ru, Zn, Zr, Nb, Sn, Mo, Sr, Sb, W, Ti and Bi; andQ is at least one element selected from the group consisting of P, N, F, S and Cl.