LITHIUM-CONTAINING METAL OXIDE, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERIES, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERIES, AND LITHIUM SECONDARY BATTERY
Publication
EP3770121A1
Kind: A1
Mar 18, 2026
Applicants
Sumitomo Metal Mining Co., Ltd.
Inventors
NAGAO Daisuke, KAGEURA Jun-ichi, MAEDA Yusuke
Abstract
A lithium composite metal oxide containing a secondary particle that is an aggregate of primary particles, in which, when a cross-sectional image of the secondary particle is acquired, and the cross-sectional image is observed, a content proportion of reference primary particles present in a central part of the secondary particle is 20% or more and 50% or less, and a content proportion of reference primary particles present in a surface part of the secondary particle is 30% or more and 100% or less.
IPC Classifications
C01G 53/00 20060101AFI20211129BHEP
H01M 4/505 20100101ALI20211129BHEP
H01M 4/525 20100101ALI20211129BHEP
Designated States
AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR