公开(公告)号：US10985367B2

公开(公告)日：2021-04-20

申请号：US15662725

申请日：2017-07-28

申请人： SAMSUNG SDI CO., LTD.

发明人： Young Jin Park ,  Chang Wook Kim ,  Eun Sung Lee

IPC分类号： H01M4/505 ,  H01M4/131 ,  H01M4/36 ,  H01M4/485 ,  H01M4/525 ,  H01M10/0568 ,  H01M10/0569 ,  C01G51/00 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/42

摘要： A lithium cobalt composite oxide for a lithium secondary battery and a lithium secondary battery, the lithium cobalt composite oxide being doped with magnesium and having an atomic ratio of Mg/Co of about 0.0035:1 to about 0.01:1.

公开(公告)号：US10665861B2

公开(公告)日：2020-05-26

申请号：US15795550

申请日：2017-10-27

申请人： SAMSUNG SDI CO., LTD.

发明人： Dongjin Kim ,  Minhan Kim ,  Dohyung Park ,  Young Jin Park ,  Kyounghyun Kim ,  Ilseok Kim

IPC分类号： H01M4/525 ,  H01M4/04 ,  H01M4/1391 ,  C01G53/00 ,  H01M4/131 ,  H01M4/36 ,  H01M4/48 ,  H01M4/505 ,  H01M10/0525

摘要： A positive active material for a rechargeable lithium battery includes a lithium nickel-based metal oxide represented by LixNi1-yMyO2 and a lithium-containing oxide on a surface of the lithium nickel-based metal oxide. In the formula LixNi1-yMyO2, M is one or more of Co, Mn, Al, Mg, Ti, Zr, or a combination thereof, 0

公开(公告)号：US10854878B2

公开(公告)日：2020-12-01

申请号：US15662987

申请日：2017-07-28

申请人： SAMSUNG SDI CO., LTD.

发明人： Young Jin Park ,  Chang Wook Kim ,  Eun Sung Lee

IPC分类号： H01M4/587 ,  H01M4/525 ,  H01M4/131 ,  H01M4/505 ,  H01M4/133 ,  C01G51/00 ,  C01G45/12 ,  C01G53/00

摘要： A lithium cobalt composite oxide for a lithium secondary battery and a lithium secondary battery, the lithium cobalt composite oxide including a magnesium (Mg)-doped lithium cobalt composite oxide having an atomic ratio of Mg to cobalt (Co) of about 0.0035:1 to about 0.01:1, wherein the Mg-doped lithium cobalt composite oxide further includes fluorine (F).

公开(公告)号：US11489192B2

公开(公告)日：2022-11-01

申请号：US16630013

申请日：2018-07-10

申请人： SAMSUNG SDI CO., LTD.

发明人： Eunsung Lee ,  Changwook Kim ,  Sangin Park ,  Sooyoun Park ,  Young Jin Park

IPC分类号： H01M4/131 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M50/46 ,  H01M50/449 ,  H01M4/02

摘要： The invention relates to a lithium secondary battery including a positive electrode, a negative electrode including a negative active material, and an electrolyte, wherein the positive electrode includes a first positive active material of a lithium manganese cobalt oxide in Chemical Formula 1, and a second positive active material of a lithium transition metal oxide that occludes and releases lithium ions; an average particle diameter (D50) of the first positive active material is smaller than an average particle diameter (D50) of the second positive active material; and the first positive active material has lower first charge/discharge efficiency than that of the negative active material and has an irreversible capacity during the first charge/discharge that is larger than an irreversible capacity during the first charge/discharge of the negative active material.