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.