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：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.