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：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：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：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.