Patents by Inventor Zijian LV

Zijian LV has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250105266
    Abstract: Provided are a negative electrode active material, a preparation method thereof, a secondary battery and an electrical device. The negative electrode active material includes a silicon-carbon composite. An X-ray photoelectron spectroscopy (XPS) of the silicon-carbon composite has a Si2p peak. The Si2p peak can form the following sub-peaks after a peak splitting treatment: a first sub-peak with a binding energy of 99.7±0.2 eV; and a second sub-peak with a binding energy of 98.9±0.2 eV. A peak area ratio of the first sub-peak to the second sub-peak is (1 to 2):1.
    Type: Application
    Filed: November 11, 2024
    Publication date: March 27, 2025
    Inventors: Zijian Lv, Jiazheng Wang
  • Publication number: 20250079454
    Abstract: The present application relates to a silicon-carbon composite material in the form of particles comprising a porous carbon skeleton, a silicon-containing deposition layer, and a carbon-containing coating layer, wherein the silicon-containing deposition layer is in pores of the porous carbon skeleton, the carbon-containing coating layer is on the silicon-containing deposition layer and/or on the surface of the particles, and the silicon-carbon composite material has an oil absorption number of 35 mL/100 g to 80 mL/100 g. The silicon-carbon composite material of the present application has a high energy density and an improved cycle life. In addition, the present application further relates to a negative electrode plate comprising the material, a secondary battery, a battery module, a battery pack, and a power consuming device.
    Type: Application
    Filed: November 15, 2024
    Publication date: March 6, 2025
    Inventors: Kai WU, Xiaobin DONG, Yuan LI, Zijian LV, Liangbin LIU, Jiazheng WANG
  • Publication number: 20250070170
    Abstract: This application relates to a silicon-carbon composite material. The silicon-carbon composite material includes a carbon nanotube-and-porous carbon composite substrate and a silicon-based material. The porous carbon is connected to the carbon nanotube by a connecting unit in the carbon nanotube-and-porous carbon composite substrate. The high conductivity and strong mechanical properties of the carbon nanotubes can improve the overall conductivity, compression resistance, and expansion resistance of the silicon-carbon composite material, thereby improving cycle performance, electrode plate cycle expansion resistance, and rate performance of a secondary battery.
    Type: Application
    Filed: November 12, 2024
    Publication date: February 27, 2025
    Inventors: Liangbin LIU, Yuan LI, Jiazheng WANG, Zijian LV, Xiaobin DONG, Donggen XIONG, Jingxian DENG
  • Publication number: 20250070148
    Abstract: A silicon carbon negative material is provided. The silicon carbon negative material includes a porous carbon base, nano-silicon crystal grains located in pores of the porous carbon base, and a carbon coating layer located on a surface of the porous carbon base. The nano-silicon crystal grains include an elemental silicon core and a LixSiy coating layer, x is an integer selected from 7 to 22, and y is an integer selected from 3 to 7.
    Type: Application
    Filed: November 14, 2024
    Publication date: February 27, 2025
    Inventors: Kai WU, Jingxian DENG, Jiazheng WANG, Zijian LV, Liangbin LIU, Yuan LI
  • Publication number: 20250070169
    Abstract: A silicon-carbon composite material and a preparation method thereof, a negative electrode plate, and a secondary battery are disclosed. The silicon-carbon composite material includes a porous carbon matrix and silicon-based particles. The porous carbon matrix internally includes a plurality of pore channels with a width of 5 nm-50 nm. The silicon-based particles are distributed in the pore channels, and the porous carbon matrix meets: 1.0×10?7?Vtotal/Stotal?10.0×10?7, where Stotal is the total surface area occupied by the pore channels with the width of 5 nm-50 nm, and the measurement unit is: ×104 cm2/g; and Vtotal is the total pore volume occupied by the pore channels with the width of 5 nm-50 nm. The silicon-carbon composite material has high electrical conductivity. When being applied to a negative electrode of the secondary battery, the silicon-carbon composite material can effectively increase the volume capacity and energy density of the secondary battery.
    Type: Application
    Filed: November 8, 2024
    Publication date: February 27, 2025
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED
    Inventors: Kai WU, Yuan LI, Xiaobin DONG, Jiazheng WANG, Liangbin LIU, Zijian LV, Yuwei QIN
  • Publication number: 20250038176
    Abstract: The present application provides a silicon-carbon composite, a method of preparing the same, and a secondary battery including the silicon-carbon composite. The silicon-carbon composite includes porous carbon-based matrix particles having a three-dimensional network interconnecting pore structure; and silicon-based nanoparticles, at least a portion of which is provided in the three-dimensional network interconnecting pore structure. The present application enables secondary batteries to have an improved cycle performance and energy density.
    Type: Application
    Filed: October 13, 2024
    Publication date: January 30, 2025
    Inventors: Kai Wu, Yuan Li, Xiaobin Dong, Zijian Lv, Liangbin Liu, Yuwei Qin, Jiazheng Wang
  • Patent number: 12199274
    Abstract: The present disclosure provides a secondary battery including a negative electrode sheet. The negative electrode sheet includes: a negative electrode current collector; a first negative film layer provided on at least one surface of the negative electrode current collector; and a second negative film layer provided on a surface of the first negative film layer. The first negative film layer includes a first negative active material and a first conductive agent, and the first negative active material includes a silicon-based material. A mass proportion of the silicon-based material in the first negative film layer is greater than or equal to 30%, and a mass proportion of the first conductive agent in the first negative film layer is greater than or equal to 25%. The secondary battery of the present disclosure does not easily expand and has good cycle performance.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: January 14, 2025
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED
    Inventors: Liangbin Liu, Jiazheng Wang, Zijian Lv, Qingwei Yan, Binyi Chen
  • Publication number: 20250007010
    Abstract: The present disclosure provides a secondary battery including a negative electrode plate, and the negative electrode plate includes: a negative electrode current collector, a first negative electrode active material layer, and a second negative electrode active material layer. The first negative electrode active material layer is arranged on at least one surface of the negative electrode current collector, and the first negative electrode active material layer includes a silicon-based material and a porous material; and the second negative electrode active material layer is arranged on a surface of the first negative electrode active material layer away from the negative electrode current collector.
    Type: Application
    Filed: September 13, 2024
    Publication date: January 2, 2025
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED
    Inventors: Liangbin LIU, Jiazheng WANG, Qingwei YAN, Xiaobin DONG, Yuan LI, Zijian LV
  • Publication number: 20240421289
    Abstract: Provided are a negative electrode active material and a preparation method thereof, a secondary battery, and an electric apparatus. The negative electrode active material includes: a core material; and a first coating layer provided on at least part of a surface of the core material, where the first coating layer includes a porous carbon material and nano silicon-based particles, and the nano silicon-based particles are embedded into pore structures of the porous carbon material.
    Type: Application
    Filed: August 26, 2024
    Publication date: December 19, 2024
    Inventors: Liangbin Liu, Jiazheng Wang, Zijian Lv, Yuan Li, Jingxian Deng, Donggen Xiong, Xiaobin Dong
  • Publication number: 20240391779
    Abstract: A silicon carbon composite material includes a carbon matrix and a silicon material, the carbon matrix has a cross-linked porous structure internally, and the silicon material is at least partially distributed in the cross-linked porous structure. A value of flexibility C1 of the silicon carbon composite material satisfies 0.4?C1?2. C1 is a factor by which a compression deformation variable of the silicon carbon composite material is scaled to be equal to its rebound deformation variable, representing flexibility of the silicon carbon composite material. When the C1 value satisfies 0.4?C1?2, the silicon carbon composite material has good flexibility, reducing overall impact of expansion stress of silicon on the silicon carbon composite material, and allowing for a certain degree of contractility of the carbon matrix framework, so that residual stress can be received and released, thereby maintaining overall stability of the silicon carbon composite material.
    Type: Application
    Filed: August 5, 2024
    Publication date: November 28, 2024
    Inventors: Yuan LI, Xiaobin DONG, Zijian LV, Liangbin LIU, Jiazheng WANG
  • Publication number: 20240274805
    Abstract: The present application provides a negative electrode active material, a secondary battery comprising the same and an electrical device, wherein the negative electrode active material comprises a matrix material and a silicon-based material, the matrix material comprises a plurality of pore structures, at least a part of the silicon-based material is located in pore structures of the matrix material, at least a part of the silicon-based material has a crystalline structure, the silicon-based material comprises a first silicon-based material and a second silicon-based material with different grain sizes, and a ratio of grain size of the first silicon-based material to grain size of the second silicon-based material is greater than or equal to 1.6. The negative electrode active material can result in a secondary battery having high energy density, high First Coulombic Efficiency, long cycle life and long storage life at the same time.
    Type: Application
    Filed: April 15, 2024
    Publication date: August 15, 2024
    Inventors: Kai Wu, Zijian Lv, Jiazheng Wang, Liangbin Liu, Jingxian Deng
  • Publication number: 20240170653
    Abstract: The present application provides a negative electrode active material, a secondary battery comprising the same and an electrical device, wherein the negative electrode active material comprises a matrix material and a silicon-based material, the matrix material comprises a plurality of pore structures, at least a part of the silicon-based material is located in pore structures of the matrix material, the silicon-based material comprises a crystalline silicon-based material, a region formed by extending from outer surface of particle of the negative electrode active material to inside of the particle by a distance of 0.5 times a length between any point on the outer surface of the particle of the negative electrode active material and a core of the particle is recorded as an outer region, and a region inside the outer region is recorded as an inner region.
    Type: Application
    Filed: January 29, 2024
    Publication date: May 23, 2024
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Kai WU, Zijian LV, Jiazheng WANG, Liangbin LIU, Jingxian DENG
  • Publication number: 20240170659
    Abstract: Provided is a negative electrode plate, comprising: a negative electrode current collector and a first negative electrode active material layer. The first negative electrode active material layer is arranged on at least one surface of the negative electrode current collector, wherein, components of the first negative electrode active material layer comprise, by mass: 30%-70% of a silicon-based material, 15%-40% of a binder and 15%-40% of a conductive agent.
    Type: Application
    Filed: February 2, 2024
    Publication date: May 23, 2024
    Inventors: Jiazheng Wang, Qingwei Yan, Liangbin Liu, Xiaobin Dong, Zijian Lv
  • Publication number: 20230282814
    Abstract: A negative electrode active material and a preparation method, a secondary battery, a battery module, a battery pack and an electrical apparatus are provided. The negative electrode active material comprises an inner core, an interlayer and an outer shell layer, wherein the interlayer is cladded on the surface of the inner core, and the outer shell layer is cladded on the surface of the interlayer; the inner core comprises silicon, an oxide of silicon and lithium silicate; the interlayer comprises silicon, or silicon and lithium silicate; and the outer shell layer comprises amorphous carbon. An inner core comprising silicon, an oxide of silicon and lithium silicate is used as a nucleus, and an interlayer containing silicon as well as an outer shell layer comprising amorphous carbon are cladded outwards in sequence to form a uniformly cladded and structurally stable negative electrode active material with a core-shell structure.
    Type: Application
    Filed: May 11, 2023
    Publication date: September 7, 2023
    Inventors: Zijian Lv, Jiazheng Wang
  • Publication number: 20230207786
    Abstract: The present application provides a secondary battery including a negative electrode sheet, and the negative electrode sheet includes: a negative electrode current collector; a first negative film layer provided on at least one surface of the negative electrode current collector; and a second negative film layer provided on a surface of the first negative film layer; where the first negative film layer includes a first negative active material and a first conductive agent, and the first negative active material includes a silicon-based material; and a mass proportion of the silicon-based material in the first negative film layer is greater than or equal to 30%, and a mass proportion of the first conductive agent in the first negative film layer is greater than or equal to 25%. A battery cell of the secondary battery of the present application does not easily expand and has good cycle performance.
    Type: Application
    Filed: November 29, 2022
    Publication date: June 29, 2023
    Inventors: Liangbin Liu, Jiazheng Wang, Zijian Lv, Qingwei Yan, Binyi Chen
  • Patent number: 11646417
    Abstract: A negative electrode sheet includes a current collector, and a first active material layer and a second active material layer that are sequentially provided on at least one surface of the current collector. The first active material layer includes a first negative electrode active material. Particle sizes of the first negative electrode active material satisfy: 0.02?A1=(Dn10)1/(Dv50)1?0.2. The second active material layer includes a second negative electrode active material. Particle sizes of the second negative electrode active material satisfy: 0.02?A2=(Dn10)2/(Dv50)2?0.3; and A1 and A2 satisfy 1<A2/A1<2.5.
    Type: Grant
    Filed: July 16, 2022
    Date of Patent: May 9, 2023
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Zijian Lv, Jiazheng Wang
  • Publication number: 20220367872
    Abstract: A negative electrode sheet includes a current collector, and a first active material layer and a second active material layer that are sequentially provided on at least one surface of the current collector. The first active material layer includes a first negative electrode active material. Particle sizes of the first negative electrode active material satisfy: 0.02?A1=(Dn10)1/(Dv50)1?0.2. The second active material layer includes a second negative electrode active material. Particle sizes of the second negative electrode active material satisfy: 0.02?A2=(Dn10)2/(Dv50)2?0.3; and A1 and A2 satisfy 1<A2/A1<2.5.
    Type: Application
    Filed: July 16, 2022
    Publication date: November 17, 2022
    Inventors: Zijian LV, Jiazheng WANG