公开(公告)号：US20220285685A1

公开(公告)日：2022-09-08

申请号：US17752005

申请日：2022-05-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhengjie LI ,  Chuanzhang GE ,  Wei ZHOU ,  Shengan XIA ,  Pinghua WANG

IPC: H01M4/583 ,  H01M4/62 ,  H01M4/04

Abstract: Embodiments of the present invention provide a negative electrode material, including a doped carbon material. The doped carbon material includes a carbon-based matrix and doping elements doped in the carbon-based matrix. The doping elements include at least two of B, N, O, P, S, and F. At least a part of the doping elements form C-Ma-Mb chemical bonds with the carbon-based matrix. Ma and Mb represent two different types of doping elements. The negative electrode material includes the doped carbon material, and the doping elements in the doped carbon material form the C-Ma-Mb chemical bonds with the carbon-based matrix. Therefore, the negative electrode material has excellent fast charging performance. Embodiments of the present invention further provide a production method of the negative electrode material, a battery including the negative electrode material, and a terminal.

公开(公告)号：US20230231115A1

公开(公告)日：2023-07-20

申请号：US18189268

申请日：2023-03-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hang SU ,  Yujing SHA ,  Shengan XIA ,  Fengchao XIE

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

CPC classification number: H01M4/366 ,  H01M4/386 ,  H01M4/0471 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/021

Abstract: In fields related to battery cathode material technologies, a nano-silicon composite material and a preparation method thereof, an electrode material, and a battery are provided to resolve large volume expansion of a cathode material of a battery and a serious side reaction with an electrolyte. The nano-silicon composite material includes a core, a first coating layer, and a second coating layer. The core includes a nano-silicon crystal. The first coating layer covers a surface of the core. The first coating layer is of a porous structure. A material of the first coating layer includes bisilicate and silicon oxide in a deoxidized state. The second coating layer covers a surface of the first coating layer. A material of the second coating layer includes silicon dioxide in a deoxidized state.

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：US20190051894A1

公开(公告)日：2019-02-14

申请号：US16159456

申请日：2018-10-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shengan XIA ,  Hui LI ,  Pinghua WANG

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525

Abstract: This application provides a silicon negative material, a silicon negative material preparation method, a negative electrode plate, and a lithium-ion battery. The silicon negative material includes a silicon core, and a buffer coating layer and a first coating layer that are coated on a surface of the silicon core, where the first coating layer is a coating layer including a carbon material, and the carbon material includes at least one of the following doping elements: N, P, B, S, O, F, Cl, or H. In embodiments of this application, fast charging performance of the silicon negative material when being used as a negative electrode of a battery is improved.

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：US20210288316A1

公开(公告)日：2021-09-16

申请号：US17325302

申请日：2021-05-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yujing SHA ,  Shengan XIA ,  Pinghua WANG

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/62 ,  H01M10/46 ,  H01M4/48 ,  C01B33/32 ,  H02J7/00

Abstract: A silicon-oxygen composite anode material includes a kernel, a coating layer wrapped outside the kernel, and an intermediate layer located between the kernel and the coating layer. The intermediate layer includes the non-lithium silicate, and mass content of the non-lithium silicate in the intermediate layer progressively decreases from the intermediate layer to the kernel. The progressive decrease includes a gradient decrease from the intermediate layer to the kernel. The gradient decrease refers to that mass proportions on a circumference with a same distance from a center of the kernel are the same, and the mass proportion decreases gradually as the distance from the center of the kernel decreases. The non-lithium silicate is generated in situ at an outer layer of the kernel, and has a non-water-soluble, non-alkaline, or weak-alkaline dense structure.

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.

公开(公告)号：US20230286808A1

公开(公告)日：2023-09-14

申请号：US18320435

申请日：2023-05-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yujing SHA ,  Ruohan YU ,  Shengan XIA ,  Yangxing LI ,  Liang ZHOU

IPC: C01B33/025 ,  H01M4/38 ,  H01M4/66 ,  H01M4/04

CPC classification number: C01B33/025 ,  H01M4/386 ,  H01M4/667 ,  H01M4/0428 ,  H01M4/0471

Abstract: Silicon carbon composite materials, preparation methods and applications of the silicon carbon composite material are provided. The silicon carbon composite material includes a core and a carbon coating layer. At least one part of a surface of the core is covered by the carbon coating layer. The core includes a carbon matrix and SiOx particles, the carbon matrix is continuously distributed and includes N channels in communication with outside, and the SiOx particles are filled in the channels. A size of the SiOx particle is 0.1 nm to 0.9 nm, 0.9≤x≤1.7, and N≥1 and is an integer.

公开(公告)号：US20180301699A1

公开(公告)日：2018-10-18

申请号：US16010947

申请日：2018-06-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiahua LIANG ,  Shengan XIA ,  Fengchao XIE

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  C01B32/21 ,  C01B32/05

Abstract: A lithium-ion rechargeable battery negative electrode active material and a preparation method thereof, a lithium-ion rechargeable battery negative electrode plate, and a lithium-ion rechargeable battery are disclosed. The negative electrode active material includes a carbon core and a coating layer formed on a surface of the carbon core, a material of the coating layer includes amorphous carbon and a doping element, and the doping element includes element nitrogen. The lithium-ion rechargeable battery negative electrode active material has the carbon core, and the coating layer that includes the doping element and the amorphous carbon is provided on the surface of the carbon core.