公开(公告)号：US20190280296A1

公开(公告)日：2019-09-12

申请号：US16422078

申请日：2019-05-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yangxing LI ,  Dan LEI

IPC: H01M4/525 ,  H01M10/0525 ,  H01M10/46 ,  H01M4/36 ,  H02J7/00

Abstract: The present application provides a lithium cobalt oxide positive electrode material, that is, a doped lithium cobalt oxide material: A general formula of doped lithium cobalt oxide is Li1+zCo1−x−yMaxMbyO2, where 0≤x≤0.01, 0≤y≤0.01, and −0.05≤z≤0.08; Ma is a doped monovalent element, and is at least one of Al, Ga, Hf, Mg, Sn, Zn, or Zr; and Mb is a doped polyvalent element, and is at least one of Ni, Mn, V, Mo, Nb, Cu, Fe, In, W, or Cr. Through substitutional doping of a monovalent element, mutation of a layered structure caused by lithium deintercalation is minimized. Through interstitial doping of a polyvalent element, oxidation of Co3' is alleviated and delayed during charging.

公开(公告)号：US20220344639A1

公开(公告)日：2022-10-27

申请号：US17854236

申请日：2022-06-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dan LEI ,  Yujing SHA ,  Yaoming DENG ,  Shengan XIA

IPC: H01M4/36 ,  H01M4/48 ,  H01M4/38 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/04

Abstract: A silicon-based negative electrode material and a method for preparing the same, a battery including the silicon-based negative electrode material, and a terminal are provided. The silicon-based negative electrode material includes a silicon-based matrix with a low silicon-oxygen ratio and silicon-based particles with a high silicon-oxygen ratio dispersed in the silicon-based matrix with the low silicon-oxygen ratio. A silicon-oxygen ratio of the silicon-based matrix with the low silicon-oxygen ratio is 1:x, and 1

公开(公告)号：US20220293922A1

公开(公告)日：2022-09-15

申请号：US17831244

申请日：2022-06-02

Applicant: Huawei Technologies Co., Ltd. ,  XTC NEW ENERGY MATERIALS (XIAMEN) LTD.

Inventor： Yu LEI ,  Dan LEI ,  Yangxing LI ,  Jian ZHANG ,  Leiying ZENG ,  Shengan XIA ,  Yunlei GAO ,  Fan XU

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  C01G51/00 ,  C01G53/00

Abstract: A lithium-ion battery cathode material and a method for preparing the same are disclosed. The lithium-ion battery cathode material includes a layered cathode material matrix and a defect layer. The layered cathode material matrix includes body layers and lithium layers, and the body layer includes a transition metal layer and a lithium layer. The defect layer includes atoms with a periodic arrangement different from that of atoms in the matrix or with content different from that of an element in the matrix. The defect layer is parallel to a 003 crystal plane of the layered cathode material matrix, and dimensions of the defect layer are 0.1 nm to 50 nm in at least one direction and 10 nm to 5000 nm in at least another direction.