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11.发明申请公开(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.
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公开(公告)号：US20240322131A1
公开(公告)日：2024-09-26
申请号：US18546083
申请日：2022-09-07
Inventor： Weili AN , Peng HE , Jianguo REN , Xueqin HE
CPC classification number: H01M4/366 , C01B33/02 , H01M4/364 , H01M4/386 , H01M4/587 , H01M4/628 , H01M10/0525 , H01M10/4235 , C01P2006/40 , H01M2004/027
Abstract: The present disclosure relates to the technical field of materials, and provides an anode material, a method preparing the same, and a lithium-ion battery. The anode material has a core-shell structure. The anode material includes a core and a porous silicon-carbon composite layer distributed on at least part of a surface of the core. The core includes a silicon-based material, and the porous silicon-carbon composite layer includes a carbon matrix and silicon particles dispersed in the carbon matrix; the carbon matrix has pores. The anode material of the present disclosure has high conductivity and high capacity, which can effectively suppress volume expansion and improve the electrochemical performance of the anode material in a battery.
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13.发明公开公开(公告)号：US20240097138A1
公开(公告)日：2024-03-21
申请号：US17768034
申请日：2021-09-22
Inventor： Zhiqiang DENG , Wei XIE , Chunlei PANG , Jianguo REN , Xueqin HE
IPC: H01M4/62 , H01M4/36 , H01M4/485 , H01M10/0525
CPC classification number: H01M4/628 , H01M4/366 , H01M4/485 , H01M4/625 , H01M10/0525 , H01M2004/027
Abstract: Provided are a composite material and a preparation method thereof, a negative electrode material, and a lithium ion battery. The negative electrode material includes at least one composite material, and the lithium ion battery includes at least one composite material. The composite material has a core-shell structure composed of an inner core and a hydrophobic coating layer, with the inner core including at least one lithium-containing silicon oxide, and the hydrophobic coating layer being used to cover the inner-core material.
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公开(公告)号：US20230378474A1
公开(公告)日：2023-11-23
申请号：US18043189
申请日：2022-05-25
Inventor： Peng HE , Chengmao XIAO , Eming GUO , Jianguo REN , Xueqin HE
IPC: H01M4/62 , H01M10/0525 , H01M4/48
CPC classification number: H01M4/625 , H01M10/0525 , H01M4/483 , H01M2004/027
Abstract: Providing an anode material and a preparation method thereof, lithium ion battery. The anode material includes an aggregate, the aggregate includes an active material, a carbon material, and a dopant element, where the carbon material is shown in a Raman spectrum obtained by Raman spectroscopy using a measurement light source having a wavelength of 532 nm that a G band is observed at 1530 cm−1 to 1630 cm−1, and a D band is observed at 1280 cm−1 to 1380 cm−1, and a ratio ID/IG of between peak intensity ID of the D band and peak intensity IG of the G band is 1 to 2.5. The anode material of the present application may significantly enhance the initial efficiency of composite material, and cycle performance and stability are also greatly improved.
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公开(公告)号：US20230261183A1
公开(公告)日：2023-08-17
申请号：US18006354
申请日：2022-06-01
Inventor： Chengmao XIAO , Peng HE , Eming GUO , Jianguo REN , Xueqin HE
IPC: H01M4/485 , H01M4/62 , H01M4/36 , H01M4/583 , H01M10/0525
CPC classification number: H01M4/485 , H01M4/625 , H01M4/366 , H01M4/583 , H01M10/0525 , H01M2004/027
Abstract: The present disclosure relates to the field of negative electrode materials, and provides a negative electrode material and a preparation method therefor, and a lithium ion battery. The negative electrode material comprises an aggregate, the aggregate comprising an active substance and a carbon material. The mass percentage of the active substance in the aggregate gradually decreases from the center to the surface of the aggregate. The negative electrode material provided by the present disclosure can effectively suppress volume expansion of the negative electrode material and improve battery cycle performance.
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Patent Agency Ranking
16.发明申请公开(公告)号：US20210391569A1
公开(公告)日：2021-12-16
申请号：US17286435
申请日：2020-05-15
Inventor： Peng HE , Eming GUO , Jianguo REN , Xueqin HE
IPC: H01M4/36 , H01M4/133 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01M4/38 , H01M4/587 , H01M10/0525
Abstract: A core-shell composite negative electrode material is made according to a preparation method and includes an application thereof. The composite negative electrode material includes: a core formed by a first active substance and a second active substance, and a carbon-coated shell serving as a third active substance. The first active substance is a sheet-like silicon-based material, the second active substance is a sheet-like graphite material, and the third substance is the carbon-coated shell. The composite material is applied to the negative electrode of a lithium ion battery, and has high specific capacity, wherein the capacity is greater than 400 mAh/g, and excellent cycle life.
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公开(公告)号：US20210107795A1
公开(公告)日：2021-04-15
申请号：US17043535
申请日：2019-02-18
Applicant: BTR NEW MATERIAL GROUP CO., LTD.
Inventor： Xiujun PAN , Dongdong LI , Haihui ZHOU , Jianguo REN , Youyuan HUANG , Min YUE
IPC: C01B32/21 , H01M10/0525
Abstract: Provided are a preparation method of a long-cycle modified graphite-based composite material and a lithium ion battery containing the material. The method including: (1) mixing a graphite material and a coating modifier; (2) placing the mixture into a self-pressurized reaction device, then placing the device in a heating apparatus to perform a self-pressurized impregnation experiment, during which temperature is controlled to increase in such a manner that the coating modifier is gradually liquefied after reaching a softening point, to completely impregnate the graphite material under self-pressurizing and to be distributed on a surface of the graphite material; (3) cooling; and (4) performing a heat treatment in an inert atmosphere to obtain the modified graphite-based composite material.
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公开(公告)号：US20250038184A1
公开(公告)日：2025-01-30
申请号：US18914449
申请日：2024-10-14
Inventor： Xi CHEN , Chunlei PANG , Yiming KONG , Jianguo REN , Xueqin HE
IPC: H01M4/36 , C01B32/05 , C01B32/956 , H01M4/02 , H01M4/587
Abstract: A composite negative electrode material includes an inner core and a coating layer on the surface of the inner core, the inner core includes a porous carbon and Si particles distributed on the surface and/or in pores of the porous carbon. The composite negative electrode material is provided with micropores and mesopores, a ratio of the pore volume of the micropores to the pore volume of the mesopores is (2-50):(50-98). An oil absorption value of the composite negative electrode material is smaller than an oil absorption value of the composite negative electrode material after removing the Si particles, and based on the oil absorption value of the composite negative electrode material after removing the Si particles being 100%, a difference between the oil absorption value of the composite negative electrode material after removing the Si particles and the oil absorption value of the composite negative electrode material is ≥10%.
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公开(公告)号：US20240304820A1
公开(公告)日：2024-09-12
申请号：US18546417
申请日：2022-12-08
Inventor： Xi CHEN , Chunlei PANG , Tengyu LIANG , Jianguo REN , Xueqin HE
IPC: H01M4/62 , C01B32/05 , C01B32/158 , H01M4/02 , H01M4/139 , H01M4/36 , H01M4/48 , H01M10/0525 , H01M10/42
CPC classification number: H01M4/625 , C01B32/05 , C01B32/158 , H01M4/139 , H01M4/366 , H01M4/483 , H01M10/0525 , H01M10/4235 , C01B2202/22 , C01B2202/36 , C01P2002/02 , C01P2004/13 , C01P2004/54 , C01P2006/40 , H01M2004/021 , H01M2004/027
Abstract: An anode material, a preparation method thereof, and application provided. The anode material includes an active substance, and a buffer layer and a carbon layer both on surface of the active substance, where the buffer layer is formed on surface of the active substance, and the carbon layer includes an amorphous carbon material on surface of the buffer layer, and a carbon nano-material extending in a direction toward and/or away from the buffer layer. In particle structure of the above anode material, the buffer layer has a certain toughness, which can effectively buffer volume expansion of the anode material. Meanwhile, the extension of the carbon nano-material also provides a certain buffer effect, which can further buffer volume expansion of the anode material, reduce stress among the anode material particles during charging and discharging process, thereby improving structure stability of the anode material, thereby improving cycling capacity retention of battery.
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公开(公告)号：US20240222612A1
公开(公告)日：2024-07-04
申请号：US18558525
申请日：2023-06-27
Inventor： Weili AN , Peng HE , Jianguo REN , Xueqin HE
CPC classification number: H01M4/386 , H01M4/366 , H01M4/622 , H01M4/625 , H01M2004/021 , H01M2004/027
Abstract: The present disclosure relates to the field of anode materials, and provides an anode material, a method for preparing the anode material, and a secondary battery. The anode material has a core-shell structure. The core includes a silicon-based active material. The shell includes a connecting layer, a buffer layer and a protective layer. The connecting layer is coated on the surface of the silicon-based active material. The buffer layer is filled between the connecting layer and the protective layer. The connecting layer is connected to the buffer layer via a covalent bond. The anode material of the present disclosure has low cost and can be produced on a large scale, and the method for preparing the anode material can reduce the volumetric expansion of the anode material and improve the structural stability and cycle stability of the anode material.
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