Patent ID: 11909043
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A positive electrode for an all-solid secondary battery including a sulfide-based solid electrolyte, the positive electrode comprising:
a first positive active material having an average particle diameter of about 15 μm to about 20 μm,
a second positive active material having an average particle diameter of about 2 μm to about 6 μm, and
a solid electrolyte,
wherein at least one selected from the first positive active material and the second positive active material comprises a coating layer, the coating layer comprising a lithium ion conductor,
wherein each of the first positive active material and the second positive active material comprises a core and a shell,
wherein the shell of the first positive active material or the second positive active material comprises a nickel-based active material comprising cobalt (Co), and
wherein the core of the first positive active material or the second positive active material comprises a nickel-based active material with less cobalt (Co) than that of the corresponding shell.