公开(公告)号：US11909035B2

公开(公告)日：2024-02-20

申请号：US17059445

申请日：2019-02-18

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Zhiqiang Deng ,  Chunlei Pang ,  Jianguo Ren ,  Youyuan Huang ,  Min Yue

IPC: H01M4/36 ,  H01M4/48 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/483 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present application provides a composite negative electrode material of a lithium ion battery, a preparation method thereof and the use thereof in a lithium ion battery. The composite negative electrode material includes a SiOx-based active material and a polycarbonate coating layer coated on a surface of the SiOx-based active material. The method includes: (1) preparing a monomer solution of unsaturated carbonate; (2) polymerizing the monomer in presence of a polymerization catalyst to obtain a polymer solution; and (3) adding a SiOx-based active material, water and a polymer catalyst to the polymer solution, and further polymerizing to coat the SiOx-based active material, to obtain the composite negative electrode material.

公开(公告)号：US11967708B2

公开(公告)日：2024-04-23

申请号：US16760550

申请日：2018-11-29

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Tengyu Liang ,  Chunlei Pang ,  Jianguo Ren ,  Min Yue

IPC: H01M4/48 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/483 ,  H01M4/366 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: Disclosed are a lithium ion battery negative electrode material and a preparation method therefor. The negative electrode material comprises SiOy (0.2

公开(公告)号：US11791461B2

公开(公告)日：2023-10-17

申请号：US16062910

申请日：2016-09-22

Applicant: BTR NEW MATERIAL GROUP CO., LTD

Inventor： Peng He ,  Sheng Li ,  Min Yue ,  Eming Guo

IPC: H01M4/38 ,  H01M4/48 ,  H01M4/1395 ,  H01M4/62 ,  H01M4/04 ,  C01B33/021 ,  H01M4/36 ,  H01M4/02 ,  H01M10/0525

CPC classification number: H01M4/386 ,  C01B33/021 ,  H01M4/0471 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/38 ,  H01M4/483 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/027

Abstract: Disclosed is a composite silicon negative electrode material. The composite silicon negative electrode material comprises a nano silicon (1), a nano composite layer (5) coated on the surface of the nano silicon, and a conductive carbon layer (4) uniformly coated outside the nano composite layer (5). The nano composite layer (5) is a silicon oxide (2) and a metal alloy (3). In the composite silicon negative electrode material with a three-layer structure, the nano composite layer (5), composed of the silicon oxide (2) and the metal alloy (3) coated on the surface of the silicon oxide (2), effectively reduces the volume expansion of the nano silicon (1), maintains the characteristic of high conductivity of the silicon material, improves the mobility of lithium ions, prevents direct contact between a silicon negative electrode and an electrolyte, and can form a hard SEI film on the surface of the composite silicon negative electrode material, thereby allowing the cycle performance of the material to be greatly enhanced. The composite silicon negative electrode material has the characteristics of a high capacity, long cycle life and high conductivity. A preparation process for the silicon negative electrode material is simple, easily controllable, and suitable for industrial production.

公开(公告)号：US11581539B2

公开(公告)日：2023-02-14

申请号：US16753094

申请日：2018-11-29

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Xingyang Liu ,  Haihui Zhou ,  Dongdong Li ,  Chengkun Zhou ,  Jianguo Ren ,  Youyuan Huang ,  Min Yue

IPC: H01M4/02 ,  H01M4/587 ,  C01B32/205 ,  C01B32/21 ,  H01M4/36 ,  H01M10/0525

Abstract: A natural graphite-based modified composite material, a preparation method therefor, and a lithium ion battery comprising the modified composite material. The natural graphite-based modified composite material comprises natural graphite and non-graphitized carbon coated on the inner and outer surfaces of the natural graphite. The preparation method comprises: (1) subjecting spherical natural graphite to isotropic treatment; (2) performing granularity control and shaping treatment; (3) subjecting the inner surface and the outer surface of the material obtained in step (2) to simultaneous modification; and (4) performing carbonization, so as to obtain a natural graphite-based modified composite material.

公开(公告)号：US12166210B2

公开(公告)日：2024-12-10

申请号：US17042640

申请日：2019-08-01

Applicant: BTR New Material Group Co., Ltd.

Inventor： Lijuan Qu ,  Chunlei Pang ,  Jianguo Ren ,  Youyuan Huang ,  Min Yue

IPC: H01M4/58 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/02

Abstract: Provided is a negative electrode material of a lithium ion secondary battery. The negative electrode material includes a carbon coating layer and a core layer. The core layer includes lithium polysilicate and silicon oxide, and silicon is uniformly embedded in the lithium polysilicate and/or in the silicon oxide. The negative electrode material has high first coulomb efficiency, long cycle performance, excellent rate performance and high safety.

公开(公告)号：US11929484B2

公开(公告)日：2024-03-12

申请号：US16476471

申请日：2018-02-27

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Chunlei Pang ,  Lijuan Qu ,  Jianguo Ren ,  Min Yue

IPC: C01B33/025 ,  C01B33/12 ,  H01M4/131 ,  H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M4/485 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/131 ,  C01B33/025 ,  C01B33/12 ,  H01M4/364 ,  H01M4/366 ,  H01M4/386 ,  H01M4/483 ,  H01M4/485 ,  H01M4/587 ,  H01M10/0525 ,  C01P2004/03 ,  C01P2004/80 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/027

Abstract: Disclosed in the present application is a compound, comprising nano silicon, a lithium-containing compound and a carbon coating, or comprising nano silicon, silicon oxide, a lithium-containing compound, and a carbon coating. The method comprises: (1) solid-phase mixing of carbon coated silicon oxide with a lithium source; and (2) preforming heat-treatment of the pre-lithium precursor obtained in step (1) in a vacuum or non-oxidising atmosphere to obtain a compound. The method is simple, and has low equipment requirements and low costs; the obtained compound has a stable structure and the structure and properties do not deteriorate during long-term storage, a battery made of cathode material containing said compound exhibits high delithiation capacity, high initial coulombic efficiency, and good recycling properties, the charging capacity is over 1920 mAh/g, the discharging capacity is over 1768 mAh/g, and the initial capacity is over 90.2%.

公开(公告)号：US11757089B2

公开(公告)日：2023-09-12

申请号：US16652238

申请日：2018-09-30

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Peng He ,  Eming Guo ,  Jianguo Ren ,  Youyuan Huang ,  Min Yue

IPC: H01M4/36 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/362 ,  H01M4/38 ,  H01M10/0525 ,  H01M2004/027

Abstract: A carbon matrix composite material, a preparation method therefor and a battery comprising the same. The carbon matrix composite material comprises micron-sized soft carbon, micron-sized hard carbon, a nano-active material, a first carbon coating layer and a second carbon coating layer, wherein the first carbon coating layer is coated on a surface of the nano-active material to form composite particles; the composite particles are dispersed on the surfaces of the soft carbon and the hard carbon, and in the second carbon coating layer; and the second carbon coating layer coats soft carbon, the hard carbon and the composite particles.

公开(公告)号：US11515530B2

公开(公告)日：2022-11-29

申请号：US16760579

申请日：2018-11-29

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Zhiqiang Deng ,  Chunlei Pang ,  Jianguo Ren ,  Youyuan Huang ,  Min Yue

IPC: H01M4/38 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/62 ,  H01M4/04 ,  B82Y30/00 ,  H01M4/02

Abstract: A silicon-based negative electrode material, a preparation method therefor and a use thereof in a lithium-ion battery. The silicon-based negative electrode material comprises a silicon-based active material and a composite layer that coats the surface of the silicon-based active material and composes a flexible polymer, flake graphite and a conductive material. The method comprises: 1) dissolving the flexible polymer in a solvent; 2) adding the flake graphite and the conductive material into the flexible polymer solution obtained in step 1) while stirring; 3) adding an anti-solvent to the mixed coating solution obtained in step 2) and stirring; 4) adding the silicon-based active material to the supersaturated mixed coating solution obtained in step 3) while stirring, and then stirring and separating; and 5) carrying out thermal treatment to obtain the silicon-based negative electrode material.