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公开(公告)号：US20250006900A1
公开(公告)日：2025-01-02
申请号：US18546769
申请日：2023-02-10
Applicant: BTR New Material Group Co., Ltd. , Dingyuan New Energy Technology Co. Ltd , Huizhou BTR New Material Technology Co., Ltd.
Inventor： Wei Xie , Chunlei Pang , Zhiqiang Deng , Jianguo Ren , Xueqin He
IPC: H01M4/36 , C01B33/02 , C01B33/113 , C01B33/26 , C01B33/32 , H01M4/02 , H01M4/48 , H01M4/587 , H01M10/0525
Abstract: An anode material, a preparation method thereof, and a lithium ion battery provided. The anode material includes a core of a silicon-based material and a first coating layer coating on at least part of surface of the core of the silicon-based material, where first coating layer has an undulation y of 1≥y≥0.10, and the undulation y of the first coating layer is expressed by Formula (I): y = 1 - exp ( - ( R max - R min ) D 50 × C ) ( I ) where, Rmax is a maximum thickness (nm) of the first coating layer, Rmin is a minimum thickness (nm) of the first coating layer, D50 is a median particle size (μm) of the anode material, and C is a mass ratio (%) of the first coating layer in the anode material. The anode material of the present disclosure has properties of excellent conductivity, cycling performance, and rate performance, and can suppress occurrence of irreversible expansion.
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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
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公开(公告)号：US20220376228A1
公开(公告)日：2022-11-24
申请号：US17771734
申请日：2021-05-21
Inventor： Lijuan Qu , Zhiqiang Deng , Chunlei Pang , Jianguo Ren , Xueqin He
IPC: H01M4/36 , H01M4/38 , H01M4/48 , H01M4/58 , H01M4/62 , H01M10/0525 , H01M4/1395 , H01M4/134 , H01M4/1397 , H01M4/136 , H01M4/04
Abstract: The present application provides a silicon-oxygen composite negative electrode material and a preparation method therefor, and a lithium ion battery. The silicon-oxygen composite negative electrode material has a core-shell structure, the core comprises nano-silicon and a silicon oxide SiOx, and the shell comprises Li2SiO3. The preparation method comprises: mixing a silicon source and a lithium source, and performing heat treatment in a non-oxygen atmosphere to obtain a composite material containing Li2SiO3; and immersing the composite material containing Li2SiO3 in an acid solution to obtain the silicon-oxygen composite negative electrode material. The nano-silicon in the negative electrode material provided by the present application is wrapped by SiOx, and the surface of SiOx is further wrapped with the Li2SiO3 having a stable structure, making it difficult for the nano-silicon to come into physical contact with substances other than the SiOx and impossible to come into direct contact with water, thereby effectively inhibiting gas production of a battery.
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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
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.
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Patent Agency Ranking
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.
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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%.
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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
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.
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公开(公告)号：US20240182314A1
公开(公告)日：2024-06-06
申请号：US18284875
申请日：2022-12-20
Inventor： Wei Xie , Chunlei Pang , Zhiqiang Deng , Jianguo Ren , Xueqin He
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.
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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.
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