公开(公告)号：US20170125809A1

公开(公告)日：2017-05-04

申请号：US15337541

申请日：2016-10-28

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Sanghoon KIM ,  Kwanghwan CHO ,  Eunsung LEE ,  Dohyung PARK ,  ILseok KIM ,  Sol CHOI

IPC: H01M4/525 ,  C01G53/00 ,  H01M2/02 ,  H01M10/0525 ,  H01M4/131

CPC classification number: H01M4/525 ,  C01G53/00 ,  C01G53/006 ,  C01G53/42 ,  C01G53/50 ,  C01P2002/60 ,  C01P2002/70 ,  C01P2002/72 ,  C01P2002/74 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/40 ,  H01M2/022 ,  H01M4/131 ,  H01M10/0525

Abstract: A composite positive active material includes a lithium nickel cobalt aluminum composite oxide. A full width at half maximum (FWHM) of a peak of a (104) plane of the lithium nickel cobalt aluminum composite oxide is 0.15 or less and an FWHM of a peak of a (108) plane of the lithium nickel cobalt aluminum composite oxide is 0.15 or less, the peaks being obtained by X-ray diffraction analysis using a CuKα X-ray. A method of preparing the composite positive active material, and a lithium secondary battery including a positive electrode including the composite positive active material are disclosed.