公开(公告)号：US20180102537A1

公开(公告)日：2018-04-12

申请号：US15722953

申请日：2017-10-02

Applicant: Samsung SDI Co., Ltd.

Inventor： Jihyun KIM ,  Changwook KIM ,  Sooyoun PARK ,  Kyouyoon SHEEM ,  Hyunjoo JE

IPC: H01M4/485 ,  H01M4/38 ,  H01M4/134

CPC classification number: H01M4/485 ,  C01G23/047 ,  C01G51/42 ,  C01P2002/50 ,  C01P2002/54 ,  C01P2004/03 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/82 ,  H01M2/263 ,  H01M4/131 ,  H01M4/134 ,  H01M4/366 ,  H01M4/386 ,  H01M4/62 ,  H01M4/623 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The positive active material includes a lithium intercalation compound and a Si-containing TiO2 present on the surface of the compound. When TiO2 is present on the surface of the lithium intercalation compound, the rate characteristics and low temperature characteristics of batteries including the lithium intercalation compound may be improved. Further, when Si-containing TiO2 is present on the surface of the lithium intercalation compound, the cycle-life characteristic and high temperature storage characteristics of batteries including the lithium intercalation compound may be further improved, compared to batteries having only TiO2. As such, the positive active material including Si-containing TiO2 provides a rechargeable lithium battery having excellent rate capability, low temperature characteristics, cycle-life characteristics and high temperature storage characteristics.