公开(公告)号：US12183919B2

公开(公告)日：2024-12-31

申请号：US17420570

申请日：2020-10-28

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Chunlei Pang ,  Lijuan Qu ,  Zhiqiang Deng ,  Jianguo Ren ,  Xueqin He

IPC: H01M4/48 ,  H01M4/04 ,  H01M4/36 ,  H01M4/02

Abstract: The present application provides a silicon-oxygen composite negative electrode material and method for preparation thereof and lithium-ion battery. The silicon-oxygen composite negative electrode material comprises a silicon-oxygen composite negative electrode material comprising SiOx, non-Li2Si2O5 lithium-containing compound, and Li2Si2O5; said Li2Si2O5 is coated on the surface of the non-Li2Si2O5 lithium-containing compound; 0≤x≤1.2. The preparation method comprises: mixing a first silicon source with a reducing lithium source and roasting, to obtain a composite material containing a non-Li2Si2O5 lithium-containing compound; the composite material containing the non-Li2Si2O5 lithium-containing compound is fused with a second silicon source and then subjected to heat treatment to obtain a silicon-oxygen composite negative electrode material. The silicon-oxygen composite anode material provided by the present application is coated with Li2Si2O5, solving the problem in the prior art of a negative electrode material producing strong alkaline or easily soluble by-products in water after pre-lithiation and affecting subsequent processing.

公开(公告)号：US20240182314A1

公开(公告)日：2024-06-06

申请号：US18284875

申请日：2022-12-20

Applicant: BTR NEW MATERIAL GROUP CO., LTD. ,  DINGYUAN NEW ENERGY TECHNOLOGY CO., LTD.

Inventor： Wei Xie ,  Chunlei Pang ,  Zhiqiang Deng ,  Jianguo Ren ,  Xueqin He

IPC: C01B33/32 ,  H01M4/02 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583

CPC classification number: C01B33/325 ,  H01M4/366 ,  H01M4/382 ,  H01M4/583 ,  C01P2002/08 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/84 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present disclosure relates to a negative electrode material and a preparation method thereof and a lithium ion battery, wherein the negative electrode material includes an active material, the active material includes a skeleton structure and a silicon oxygen material embedded on the skeleton structure; the skeleton structure includes a skeleton of lithium silicate located inside the active material and a skeleton of water-insoluble silicate located on a surface layer of the active material, and the skeleton of water-insoluble silicate is linked with the skeleton of lithium silicate, wherein in an XRD pattern of the negative electrode material, an intensity of a strongest diffraction characteristic peak of the lithium silicate is IA, and an intensity of a strongest diffraction characteristic peak of the water-insoluble silicate is IB, and 0.03≤IB/IA≤0.2.

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：US20230378444A1

公开(公告)日：2023-11-23

申请号：US18247929

申请日：2021-10-13

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Peng HE ,  Chengmao XIAO ,  Eming GUO ,  Jianguo REN ,  Xueqin HE

IPC: H01M4/36 ,  H01M4/583 ,  H01M4/38 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/583 ,  H01M4/386 ,  H01M10/0525 ,  H01M2004/021

Abstract: The present application relates to a field of anode material, and a silicon carbon composite anode material and preparation method thereof, and a lithium ion battery provided. The silicon carbon composite anode material includes a silicon-based active particle, a conductive material, and a carbon coating layer, where the carbon coating layer is present on surface of the silicon-based active particle and/or the conductive material; and a semi-width of an X-ray diffraction angle (2θ) of the silicon-based active particle on a crystal face (111) is greater than or equal to 0.5 degree when X-ray diffraction of the silicon-based active particle is tested with CuKα ray. The silicon carbon composite anode material and preparation method thereof, and a lithium ion battery can effectively inhibit volume expansion of anode material and improve cycle performance of battery.

公开(公告)号：US20230075032A1

公开(公告)日：2023-03-09

申请号：US17800340

申请日：2021-04-07

Applicant: BTR NEW MATERIAL GROUP CO., LTD. ,  Dingyuan New Energy Technology Co., Ltd.

Inventor： Zongzhou CHE ,  Peng HE ,  Jianguo REN ,  Xueqin HE

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/587 ,  H01M4/04

Abstract: The present disclosure provides a multi-component composite anode material, a method for preparing the same, a lithium-ion battery anode material, and a lithium-ion battery. The multi-component composite anode material includes a core and a shell covering surface of the core; the core includes a graphite substrate and an embedding component embedded in the graphite substrate. The embedding component include nano silicon, lithium titanate, and a first non-graphitic carbon material. The shell includes a second non-graphitic carbon material. The method includes: calcining a first precursor formed by a titanium source, nano-silicon, a lithium source and graphite to prepare a second precursor containing lithium titanate; and carbon-coating the second precursor with a carbon source. The multi-component composite anode material has high specific capacity, high initial coulombic efficiency, ultra-low volume expansion, excellent cycle performance and excellent rate performance.

公开(公告)号：US20220393171A1

公开(公告)日：2022-12-08

申请号：US17776177

申请日：2021-09-09

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Haihui ZHOU ,  Liangyou HU ,  Xiujun PAN ,  Dongdong LI ,  Dianchen ZHANG ,  Jianguo REN ,  Xueqin HE

IPC: H01M4/587 ,  H01M4/36 ,  H01M4/62 ,  C01B32/21

Abstract: A graphite anode material, an anode, a lithium ion battery and preparation methods thereof. The graphite anode material includes a natural graphite core, a carbon coating layer, and a graphitizing filler. The natural graphite core has pores. The graphitizing filler is filled in the pores inside the natural graphite core. The graphitizing filler further forms the carbon coating layer. The preparation method includes: mixing natural graphite with a filler, and then pulverizing to obtain a graphite powder body; and graphitizing the graphite powder body in a protective atmosphere to obtain a graphite anode material. The preparation method reduces material turnover and residual loss, and achieves simple process and high production efficiency. The anode and lithium ion battery prepared have high first efficiency and excellent cycling performance.

公开(公告)号：US20220115652A1

公开(公告)日：2022-04-14

申请号：US17420570

申请日：2020-10-28

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Chunlei PANG ,  Lijuan QU ,  Zhiqiang DENG ,  Jianguo REN ,  Xueqin HE

IPC: H01M4/48 ,  H01M4/36 ,  H01M4/04

Abstract: The present application provides a silicon-oxygen composite negative electrode material and method for preparation thereof and lithium-ion battery. The silicon-oxygen composite negative electrode material comprises a silicon-oxygen composite negative electrode material comprising SiOx, non-Li2Si2O5 lithium-containing compound, and Li2Si2O5; said Li2Si2O5 is coated on the surface of the non-Li2Si2O5 lithium-containing compound; 0≤x≤1.2. The preparation method comprises: mixing a first silicon source with a reducing lithium source and roasting, to obtain a composite material containing a non-Li2Si2O5 lithium-containing compound; the composite material containing the non-Li2Si2O5 lithium-containing compound is fused with a second silicon source and then subjected to heat treatment to obtain a silicon-oxygen composite negative electrode material. The silicon-oxygen composite anode material provided by the present application is coated with Li2Si2O5, solving the problem in the prior art of a negative electrode material producing strong alkaline or easily soluble by-products in water after pre-lithiation and affecting subsequent processing.

公开(公告)号：US20250070138A1

公开(公告)日：2025-02-27

申请号：US18941450

申请日：2024-11-08

Applicant: BTR NEW MATERIAL GROUP CO., LTD.

Inventor： Lijuan QU ,  Chunlei PANG ,  Jianguo REN ,  Youyuan HUANG ,  Min YUE

IPC: H01M4/36 ,  C01B33/113 ,  H01M4/48 ,  H01M4/58 ,  H01M4/587

Abstract: A negative electrode material of a lithium ion secondary battery includes a carbon coating layer and a core layer. The core layer comprises lithium polysilicate and silicon oxide. A preparation method for the negative electrode material and a use therefor are described. The negative electrode material has high first coulomb efficiency, long cycle performance, excellent rate performance, and high safety.

公开(公告)号：US20250054956A1

公开(公告)日：2025-02-13

申请号：US18923598

申请日：2024-10-22

Applicant: BTR NEW MATERIAL GROUP CO., LTD. ,  Panasonic Holdings Corporation

Inventor： Yi LIU ,  Yosuke SATO

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/587 ,  H01M10/0525

Abstract: Relating to the field of anode material, an anode material, a preparation method thereof and a lithium ion battery provided. The anode material includes an aggregate, the aggregate comprises a carbon material and a silicon material, there is an anion present in the aggregate, and the anion accounts a mass content of 0.001 wt % to 0.5 wt % in the anode material. The anode material, preparation method thereof, and lithium ion battery provided improve initial Coulombic efficiency of a silicon anode material, and reduce production cost.

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.