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：US11217822B2

公开(公告)日：2022-01-04

申请号：US16972824

申请日：2020-06-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Chengyong Liu ,  Bobing Hu ,  Jiawei Fu ,  Qian Li ,  Meng Cheng ,  Yongsheng Guo

IPC: H01M10/0562 ,  H01M10/0525 ,  H01M10/0585

Abstract: The present application provides a preparation method for a solid electrolyte, including: acquiring an initial reaction mixture including a lithium precursor, a central atom ligand and an organic solvent; acquiring a modified solution including a borate ester and the organic solvent; mixing the initial reaction mixture and the modified solution, and drying to acquire an initial product; performing a grinding, cold press and heat treatment to the initial product to obtain the solid electrolyte. In the preparation method provided by the present application, a B and O co-doped sulphide solid electrolyte can be obtained by modifying the sulphide solid electrolyte with the borate ester as a doping raw material. The ionic conductivity of the prepared sulphide solid electrolyte is significantly improved, which is also conducive to improvement of energy density of the all-solid-state batteries.

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：US20220109180A1

公开(公告)日：2022-04-07

申请号：US17553836

申请日：2021-12-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qian LI ,  Chengyong Liu ,  Yongshen Guo ,  Jiawei Fu ,  Bobing Hu ,  Meng Cheng

IPC: H01M10/0525 ,  H01M4/1395 ,  H01M10/0565

Abstract: The present application discloses a lithium metal battery, a process for preparing the same, an apparatus containing the lithium metal battery, and a negative electrode plate. The lithium metal battery includes a positive electrode plate, a negative electrode plate and an electrolyte, the positive electrode plate including a positive electrode current collector and a positive electrode active material layer arranged on at least one surface of the positive electrode current collector and comprising a positive electrode active material, wherein the negative electrode plate includes a polymer material base layer; and a lithium-based metal layer that is directly bonded to at least one surface of the polymer material base layer.

公开(公告)号：US20230198015A1

公开(公告)日：2023-06-22

申请号：US18062583

申请日：2022-12-07

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0565 ,  H01M10/052 ,  C09K19/32

CPC classification number: H01M10/0565 ,  H01M10/052 ,  C09K19/32 ,  H01M2300/0082

Abstract: A supramolecular ionic liquid, a solid-state electrolyte membrane, a solid-state lithium metal battery, and an apparatus are provided. The supramolecular ionic liquid of this disclosure has a benzophenanthrene structure represented by formula (I), where R1 is selected from ether groups, polyether groups, halogenated ether groups, or halogenated polyether groups having 1 to 16 carbon atoms; and R2 is selected from ether groups or polyether groups having 1 to 16 carbon atoms. The supramolecular ionic liquid of this disclosure has an ionic conductivity as high as 10−3 S/cm at room temperature. A solid-state electrolyte membrane made therefrom also has an ionic conductivity as high as 10−3 S/cm at room temperature. This is close to performance of a liquid electrolyte, proposing a solution to the problem of low ionic conductivity in existing solid-state electrolytes.

公开(公告)号：US11699812B2

公开(公告)日：2023-07-11

申请号：US17509097

申请日：2021-10-25

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Jiawei Fu ,  Chengyong Liu ,  Yongsheng Guo ,  Bobing Hu

IPC: H01M10/0562 ,  H01M10/0525

CPC classification number: H01M10/0562 ,  H01M10/0525 ,  H01M2300/0068

Abstract: The present application discloses a sulfide solid electrolyte and a method for the preparation thereof, an all solid state lithium secondary battery, and an apparatus containing the all solid state lithium secondary battery. The sulfide solid electrolyte is obtained by compounding at least Li2S, P2S5 and a dopant MxS2O3, wherein M is one or more selected from Na, K, Ba and Ca, and 1≤x≤2.

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.