公开(公告)号：US10367199B2

公开(公告)日：2019-07-30

申请号：US15123618

申请日：2014-09-12

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woosuk Cho ,  Jeomsoo Kim ,  Junho Song ,  Taeeun Yim ,  Sanggil Woo ,  Youngjun Kim ,  Kowoon Lee

IPC: H01M4/525 ,  H01M4/485 ,  C01G53/00 ,  C01G23/047 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/02

Abstract: The present invention relates to a cathode active material, a lithium secondary battery having the same, and a method for preparing the same, and the purpose of the present invention is to provide battery properties and thermal stability under a high temperature environment even if the Ni content of M in LiMO2(M=Ni, Co, Ti, Zr, etc.) of layered oxide is increased to 65% or more. The present invention provides a cathode active material for a lithium secondary battery which is represented by chemical formula 1 below and is obtained by substituting a part of Ni, Co and Mn for a dissimilar metal (M) through heat treatment with a lithium source after coating the dissimilar metal (M) on the surface of a transition metal precursor comprising Ni, Co and Mn. LiNiaCobMncMdO2  [Chemical Formula 1] (0.6

公开(公告)号：US20170077514A1

公开(公告)日：2017-03-16

申请号：US15123618

申请日：2014-09-12

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woosuk Cho ,  Jeomsoo Kim ,  Junho Song ,  Taeeun Yim ,  Sanggil Woo ,  Youngjun Kim ,  Kowoon Lee

IPC: H01M4/525 ,  C01G23/047 ,  C01G53/00 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  C01G23/047 ,  C01G53/006 ,  C01G53/50 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/84 ,  C01P2006/40 ,  H01M4/485 ,  H01M4/505 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present invention relates to a cathode active material, a lithium secondary battery having the same, and a method for preparing the same, and the purpose of the present invention is to provide battery properties and thermal stability under a high temperature environment even if the Ni content of M in LiMO2(M=Ni, Co, Ti, Zr, etc.) of layered oxide is increased to 65% or more. The present invention provides a cathode active material for a lithium secondary battery which is represented by chemical formula 1 below and is obtained by substituting a part of Ni, Co and Mn for a dissimilar metal (M) through heat treatment with a lithium source after coating the dissimilar metal (M) on the surface of a transition metal precursor comprising Ni, Co and Mn. LiNiaCobMncMdO2   [Chemical Formula 1] (0.6

Abstract translation: （0.6

公开(公告)号：US10431812B2

公开(公告)日：2019-10-01

申请号：US15105474

申请日：2014-10-29

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Junho Song ,  Youngjun Kim ,  Jeomsoo Kim ,  Woosuk Cho ,  Sanggil Woo ,  Taeeun Yim ,  Kyungjun Lee ,  Yeonggwang Park

IPC: H01M4/505 ,  H01M4/1397 ,  H01M4/525 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/58 ,  C01G53/00 ,  H01M4/04 ,  H01M4/136 ,  H01M4/48 ,  H01M10/0525 ,  H01M4/02

Abstract: The present invention relates to a non-aqueous cathode material for lithium secondary batteries using a spherical transition metal complex carbonate, and a method for preparing same. According to the present invention, since the surface of a spherical transition metal complex carbonate, which is prepared by using a cobalt material, nickel material, manganese material, carboxyl group material, and ammonia material, is coated with titanium dioxide. In addition, by mixing the prepared, surface-coated transition metal complex carbonate with a lithium material and heat-treating the resultant material, it is possible to prepare a spherical Li-rich cathode material having a primary particle size of 200 nm or more, and a 0.1 C capacity of 250 mAh/g or more, and capable of implementing 96% or more of the initial capacity in a full cell after charging and discharging 60 times.