公开(公告)号：US20150111106A1

公开(公告)日：2015-04-23

申请号：US14321195

申请日：2014-07-01

Applicant: Samsung Electronics Co., Ltd.

Inventor： In-hyuk SON ,  Min-sang SONG ,  In-yong SONG ,  Jae-man CHOI

IPC: H01M4/36 ,  H01M4/1391 ,  H01M4/62 ,  H01M4/04 ,  H01M4/525 ,  H01M4/505

CPC classification number: H01M4/366 ,  H01M4/0428 ,  H01M4/0471 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/625 ,  H01M4/626 ,  H01M10/052 ,  Y02E60/122 ,  Y02T10/7011

Abstract: A positive electrode active material including: a lithium complex oxide represented by Formula 1; and a carbon coating layer disposed on the lithium complex oxide, wherein, in a C1s XPS spectrum of the positive electrode active material, a peak intensity of a first peak at a binding energy from about 288 eV to about 293 eV is greater than a peak intensity of a second peak at a binding energy from about 283 eV to about 287 eV, and in an O1s X-ray photoelectron spectrum of the positive electrode active material, a peak intensity of a third peak at a binding energy from about 530.5 eV to about 535 eV is greater than a peak intensity of a fourth peak at a binding energy from about 527.5 electron volts to about 530 electron volts, LiaMbM′cM″dOe.  Formula 1

Abstract translation: 1.一种正极活性物质，其包含：式1表示的锂复合氧化物; 以及设置在所述锂复合氧化物上的碳涂层，其中在所述正极活性物质的C1s XPS光谱中，约288eV至约293eV的结合能的第一峰的峰强度大于峰值 在约283eV至约287eV的结合能量处的第二峰的强度，以及在正极活性物质的O1s X射线光电子光谱中，在约530.5eV的结合能下的第三峰的峰强度为约530.5eV至 约535eV大于在约527.5电子伏特至约530电子伏特，LiaMbM'cM“dee的结合能力处的第四峰的峰值强度。 公式1