公开(公告)号：US20240376638A1

公开(公告)日：2024-11-14

申请号：US18778051

申请日：2024-07-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ruoyu XU ,  Guangxin LI ,  Shengan XIA ,  Yu LEI ,  Bo WANG

IPC: C30B33/06 ,  C01G53/00 ,  C30B29/22 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0562

Abstract: Examples of a crystal material and a preparation method are described. One example crystal material includes a secondary particle formed by agglomerating a plurality of monocrystalline grains. There are grain boundaries between the grains. Another example crystal material includes a monocrystalline particle. Each monocrystalline particle includes one monocrystalline grain. The crystal material is obtained by modifying a crystal material primary product in which monocrystalline particles have few defects, a gap at a grain boundary of a secondary particle is small, and bonding between grains is strong.

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.

公开(公告)号：US20230327090A1

公开(公告)日：2023-10-12

申请号：US18322289

申请日：2023-05-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shuoyu LI ,  Shengan XIA ,  Yu LEI ,  Yujing SHA

IPC: H01M4/505 ,  H01M4/58 ,  C01G51/00 ,  H01M4/36 ,  H01M4/525

CPC classification number: H01M4/366 ,  C01G51/42 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M2004/028

Abstract: The present disclosure relates to positive-electrode pre-lithiation agents. One example positive-electrode pre-lithiation agent includes a catalyst and a lithium-rich material, where the catalyst is an oxide positive-electrode active material, an intensity ratio of a crystal plane diffraction peak of the catalyst to a crystal plane diffraction peak of the catalyst is less than or equal to 2, the catalyst is configured to catalyze the lithium-rich material to decompose to release active lithium, and the lithium-rich material includes at least one of lithium oxide, lithium peroxide, lithium fluoride, lithium carbonate, lithium oxalate, or lithium acetate.