公开(公告)号：US11764360B2

公开(公告)日：2023-09-19

申请号：US17559378

申请日：2021-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qian Li ,  Meng Cheng ,  Chengyong Liu ,  Bobing Hu ,  Jiawei Fu ,  Shengyuan Huang ,  Yongsheng Guo

IPC: H01M4/62 ,  H01M4/73 ,  H01M4/04 ,  H01M10/0525 ,  C08J5/18 ,  H01M4/02

CPC classification number: H01M4/623 ,  C08J5/18 ,  H01M4/0404 ,  H01M4/73 ,  C08J2353/00 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2220/20

Abstract: This application provides a negative electrode plate, a lithium metal battery, and an apparatus including the lithium metal battery. The negative electrode plate includes a negative electrode current collector and a lithium-metal negative electrode disposed on at least one surface of the negative electrode current collector, where a polymer protective film is disposed on a surface of the lithium-metal negative electrode away from the negative electrode current collector, the polymer protective film includes a citric acid copolymer, and a number-average molecular weight Mn of the citric acid copolymer is 10,000 to 1,000,000. In this application, a polymer protective film with high tensile strength, high puncture strength, high elongation, and high electrolyte holding capacity may be formed on the surface of the lithium-metal negative electrode in the negative electrode plate.

公开(公告)号：US11831024B2

公开(公告)日：2023-11-28

申请号：US17810644

申请日：2022-07-05

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Ang Fu ,  Chengyong Liu ,  Yongsheng Guo ,  Jiawei Fu ,  Qian Li ,  Bobing Hu ,  Shengyuan Huang

IPC: H01M4/66 ,  H01M4/80 ,  H01M10/052 ,  H01M4/02

CPC classification number: H01M4/667 ,  H01M4/66 ,  H01M4/801 ,  H01M10/052 ,  H01M2004/027

Abstract: This application provides a polymer current collector, a preparation method thereof, and a secondary battery, battery module, battery pack, and apparatus associated therewith. The polymer current collector provided in this application includes polymer film layers, where the polymer film layers include a first polymer film layer and a second polymer film layer, a resistivity of the first polymer film layer is denoted as ρ1, a resistivity of the second polymer film layer is denoted as ρ2, and the current collector satisfies ρ1>ρ2. The polymer current collector in this application can induce to deposit of lithium metal from a low conductivity side to a high conductivity side, avoiding risks of depositing lithium ions on the surface of the current collector and thereby increasing cycle life of lithium metal batteries.

公开(公告)号：US20240347776A1

公开(公告)日：2024-10-17

申请号：US18755332

申请日：2024-06-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hansen WANG ,  Chengyong LIU ,  Zhangdi Xie ,  Shengyuan Huang ,  Bobing Hu

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2300/0034 ,  H01M2300/0037

Abstract: Provided is an electrolyte, including a first solvent represented by formula I and a second solvent selected from one or more of formula II and formula III, where R1 is selected from C1-C6 fluoroalkyl; R2 is selected from a hydrogen atom, C1-C6 alkyl or C1-C6 fluoroalkyl; n represents 1 or 2; and R3 to R10 are each independently selected from a hydrogen atom, a fluorine atom, C1-C6 alkyl, or C1-C6 fluoroalkyl. The electrolyte of the disclosure can improve cycle stability and safety of the battery. A secondary battery including the electrolyte, a battery module, a battery pack, and an electrical device are also disclosed.

公开(公告)号：US20220384861A1

公开(公告)日：2022-12-01

申请号：US17816426

申请日：2022-07-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bobing Hu ,  Shengyuan Huang ,  Chengyong Liu ,  Jiawei Fu ,  Xiaoning He ,  Jieliang Zou ,  Chengbin Zhong

IPC: H01M10/42 ,  H01M4/62 ,  H01M4/38 ,  H01M4/134 ,  H01M4/1395 ,  H01M10/052

Abstract: A negative-electrode plate, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an electric apparatus including such negative-electrode plate are provided. The negative-electrode plate includes an alkali metal layer and a polymer film layer provided on at least one surface of the alkali metal layer. Surface resistivity of the polymer film layer gradually increases in a thickness direction of the polymer film layer away from the alkali metal layer. When the negative-electrode plate is used in a secondary battery, lithium dendrites can be effectively inhibited.

公开(公告)号：US20220367877A1

公开(公告)日：2022-11-17

申请号：US17810644

申请日：2022-07-05

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Ang Fu ,  Chengyong Liu ,  Yongsheng Guo ,  Jiawei Fu ,  Qian Li ,  Bobing Hu ,  Shengyuan Huang

IPC: H01M4/66 ,  H01M4/04 ,  H01M10/052 ,  H01M4/80

Abstract: This application provides a polymer current collector, a preparation method thereof, and a secondary battery, battery module, battery pack, and apparatus associated therewith. The polymer current collector provided in this application includes polymer film layers, where the polymer film layers include a first polymer film layer and a second polymer film layer, a resistivity of the first polymer film layer is denoted as ρ1, a resistivity of the second polymer film layer is denoted as ρ2, and the current collector satisfies ρ1>ρ2. The polymer current collector in this application can induce to deposit of lithium metal from a low conductivity side to a high conductivity side, avoiding risks of depositing lithium ions on the surface of the current collector and thereby increasing cycle life of lithium metal batteries.

公开(公告)号：US20240421355A1

公开(公告)日：2024-12-19

申请号：US18809341

申请日：2024-08-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hansen Wang ,  Chengyong Liu ,  Shengyuan Huang ,  Bobing Hu ,  Zhangdi Xie ,  Shangju Liao

IPC: H01M10/0569 ,  H01M4/02 ,  H01M4/38 ,  H01M10/052

Abstract: Provided are a non-aqueous electrolyte, a secondary battery, a battery module, a battery pack, and an electrical device. The non-aqueous electrolyte includes orthocarbonate, chain carbonate, cyclic carbonate, and lithium salt, a mass content of the orthocarbonate is 10% to 80%, and at least one of the chain carbonate or the cyclic carbonate is fluoride. A central carbon atom of the orthocarbonate is bonded to four oxygen atoms, each of which is further bonded to an alkyl or halogenated alkyl chain, which plays an electron attraction role for lone pair electrons of the oxygen atoms, and increases steric hindrance surrounding the oxygen atoms, weakening the capability of the oxygen atoms in binding to lithium ions, and facilitating SEI film formation dominated by anion decomposition.

公开(公告)号：US12113167B2

公开(公告)日：2024-10-08

申请号：US18311904

申请日：2023-05-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bobing Hu ,  Chengyong Liu ,  Shangju Liao ,  Xiaoning He ,  Wenwen Xue ,  Zhangdi Xie ,  Shengyuan Huang ,  Jieliang Zou

IPC: H01M10/052 ,  H01M10/0562 ,  H01M10/0565 ,  H01M10/0567

CPC classification number: H01M10/0562 ,  H01M10/052 ,  H01M10/0565 ,  H01M10/0567 ,  H01M2220/20 ,  H01M2300/0068 ,  H01M2300/0082 ,  H01M2300/0091

Abstract: A composite electrolyte, including a sulfide electrolyte, a polymer electrolyte, and a functional additive material are provided. In some embodiments, the functional additive material is selected from polymers represented by the following structural R1—O—R2-A. In some embodiments, R1 is selected from at least one of polyvinyl group, polypropylene group, polyacrylate group, polyvinylcarbonate group, polyacrylonitrile group, and polystyrene group; R2 is a straight-chain or branched alkyl group with 3-10 carbon atoms; A is selected from at least one aromatic hydrocarbon group of benzene group, biphenyl group, triphenyl group, naphthalene group, anthracene group, phenanthrene group, and pyrene group; and X is selected from at least one of hydrogen atom, halogen atom, mercapto group, hydroxyl group, amine group, and aldehyde group.

公开(公告)号：US20240047736A1

公开(公告)日：2024-02-08

申请号：US18311904

申请日：2023-05-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bobing Hu ,  Chengyong Liu ,  Shangju Liao ,  Xiaoning He ,  Wenwen Xue ,  Zhangdi Xie ,  Shengyuan Huang ,  Jieliang Zou

IPC: H01M10/0562 ,  H01M10/0565 ,  H01M10/0567 ,  H01M10/052

CPC classification number: H01M10/0562 ,  H01M10/0565 ,  H01M10/0567 ,  H01M10/052 ,  H01M2220/20 ,  H01M2300/0091 ,  H01M2300/0068 ,  H01M2300/0082

Abstract: A composite electrolyte, including a sulfide electrolyte, a polymer electrolyte, and a functional additive material are provided. In some embodiments, the functional additive material is selected from polymers represented by the following structural R1—O—R2-A. In some embodiments, R1 is selected from at least one of polyvinyl group, polypropylene group, polyacrylate group, polyvinylcarbonate group, polyacrylonitrile group, and polystyrene group; R2 is a straight-chain or branched alkyl group with 3-10 carbon atoms; A is selected from at least one aromatic hydrocarbon group of benzene group, biphenyl group, triphenyl group, naphthalene group, anthracene group, phenanthrene group, and pyrene group; and X is selected from at least one of hydrogen atom, halogen atom, mercapto group, hydroxyl group, amine group, and aldehyde group.