公开(公告)号：US20190198863A1

公开(公告)日：2019-06-27

申请号：US16327403

申请日：2017-08-17

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Soojeong LEE

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/583 ,  H01M4/134 ,  H01M4/133 ,  H01M10/0525

CPC classification number: H01M4/364 ,  H01M4/13 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/386 ,  H01M4/387 ,  H01M4/583 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: Disclosed is that an anode active material for a lithium secondary battery, and a lithium secondary battery comprising the same. The anode active material for a lithium secondary battery comprises a composite of a Si-based or Sn-based material and a carbon-based material, a Raman spectrum peak intensity ratio (ID/ID′) of a peak intensity (ID) of a D peak (1360 cm−1 to 1370 cm−1) relative to a peak intensity (ID′) of a D′ peak (1620 cm−1 to 1625 cm−1) of the carbon-based material is 4.5 to 10, a peak intensity ratio (IG/ID) of a peak intensity (IG) of a G peak (1580 cm−1 to 1590 cm−1) relative to a peak intensity (ID) of a D peak (1360 cm−1 to 1370 cm−1) of the carbon-based material is 0.6 to 1.5, and an average diameter (D50) of the Si-based or Sn-based metallic material is 30 nm to 80 nm.

公开(公告)号：US20190341613A1

公开(公告)日：2019-11-07

申请号：US16462386

申请日：2017-11-09

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Soojeong LEE ,  Changsu SHIN

IPC: H01M4/587 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: Provided is an anode active material, including: an amorphous carbon material in which the ratio of moieties having a distance d002 of 3.77 Å or more between crystal planes is 4% to 15% based on the entire crystal plane distance distribution. When the anode active material is used, the lifespan characteristics of a lithium battery may be improved while exhibiting high capacity.

公开(公告)号：US20170244099A1

公开(公告)日：2017-08-24

申请号：US15437810

申请日：2017-02-21

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Sun-IL PARK ,  Young-Kee KIM ,  Joon-Kil SON ,  Soojeong LEE

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/364 ,  H01M4/485 ,  H01M4/525 ,  H01M4/625 ,  H01M10/0525

Abstract: A negative electrode for a rechargeable lithium battery includes a negative active material including a titanium-containing oxide and amorphous carbon. The titanium-containing oxide is present in a larger amount than the amorphous carbon.