公开(公告)号：US11276901B2

公开(公告)日：2022-03-15

申请号：US16088719

申请日：2017-09-29

Applicant: LG CHEM, LTD.

Inventor： Ji-Won Min ,  Seok-Koo Kim ,  Hoe-Jin Hah ,  Janis Doelle

IPC: H01M50/00 ,  H01M50/449 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

Abstract: The present disclosure relates to a separator for a lithium ion secondary battery and a battery comprising the separator. The separator supplements the irreversible capacity of a negative electrode. The separator comprises composite particles (A), and the composite particles (A) include a core portion comprising lithium composite metal oxide particles and a shell portion comprising a carbonaceous material with which the core surface is coated at least partially; the composite particles (A) cause lithium deintercalation at 0.1 V to 2.5 V (vs. Li+/Li); the battery has a positive electrode potential of 3 V or more (vs. Li+/Li); and the battery has a driving voltage of 2.5 V to 4.5 V.