公开(公告)号：US20220069355A1

公开(公告)日：2022-03-03

申请号：US17521766

申请日：2021-11-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng CHENG ,  Chengyong LIU ,  Bobing HU ,  Yongsheng GUO ,  Jiawei FU ,  Qian LI ,  Chengdu LIANG

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/46 ,  H01M4/66

Abstract: This application provides a lithium metal battery, and relates to the battery field. The lithium metal battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and an electrolytic solution infiltrating the separator. The negative electrode includes a negative electrode current collector and a lithium-aluminum alloy layer disposed on at least one surface of the negative electrode current collector; and the electrolytic solution includes an electrolyte and a solvent, where the solvent contains a film-forming agent, and the film-forming agent is FEC and/or DFEC.

公开(公告)号：US20220115666A1

公开(公告)日：2022-04-14

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 ,  C08J5/18

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：US20210257657A1

公开(公告)日：2021-08-19

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：US20220200004A1

公开(公告)日：2022-06-23

申请号：US17582401

申请日：2022-01-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bobing HU ,  Chengyong LIU ,  Yongsheng GUO ,  Meng CHENG ,  Jiawei FU ,  Qian LI ,  Chengdu LIANG

IPC: H01M4/62 ,  H01M10/0562 ,  H01M10/0525 ,  H01M4/134

Abstract: This application provides a lithium secondary battery and a negative electrode plate for the lithium secondary battery. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector, where a surface of the negative electrode active material layer closer to the current collector is provided with an elastic coating. And the elastic coating includes an elastic polymer and a conductive agent. At a pressure of 1 MPa to 20 MPa, the elastic coating has a compression deformation of 20% to 80% and an elastic modulus of 1 MPa to 800 MPa. And optionally, at the pressure of 1 MPa to 20 MPa, the elastic coating has a compression deformation of 30% to 60% and an elastic modulus of 5 MPa to 100 MPa.

公开(公告)号：US20230223545A1

公开(公告)日：2023-07-13

申请号：US18125174

申请日：2023-03-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengyong LIU ,  Meng CHENG ,  Ang FU ,  Bobing HU ,  Yongsheng GUO ,  Quan FAN

IPC: H01M4/62 ,  H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  H01M4/04 ,  H01M4/1395

CPC classification number: H01M4/628 ,  H01M4/134 ,  H01M4/382 ,  H01M10/052 ,  H01M4/0402 ,  H01M4/1395 ,  H01M2004/027

Abstract: Embodiments of the present application provide a lithium metal negative electrode, a preparation method therefor and related lithium metal battery and device. The lithium metal negative electrode may comprise: a negative electrode current collector; at least one lithium-based metal layer provided on at least one surface of the negative electrode current collector; and an ion-conducting polymer modification layer, which is located on the surface of one of the at least one lithium-based metal layer and comprises at least catalytic amount of a Lewis acid, the Lewis acid containing cations of a metal capable of forming an alloy-type active material with lithium.

公开(公告)号：US20220123353A1

公开(公告)日：2022-04-21

申请号：US17564429

申请日：2021-12-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jiawei FU ,  Chengyong LIU ,  Bobing HU ,  Qian LI ,  Meng CHENG ,  Yongsheng GUO

IPC: H01M10/056 ,  H01M10/0525

Abstract: The solid electrolyte membrane in this application has a first surface and a second surface opposite the first surface, where the first surface is provided with several micropores that extend into an interior of the solid electrolyte membrane without penetrating to the second surface. This application further provides a solid-state lithium metal battery, battery module, battery pack, and apparatus containing such solid electrolyte membrane. In the solid electrolyte membrane provided in this application, the micropores provided on the first surface of the solid electrolyte membrane do not penetrate to the opposite second surface, so that lithium ions can be induced to deposit in the micropores. This reduces the risk of lithium dendrites growing or even penetrating through the solid electrolyte membrane due to non-uniform deposition of lithium ions at other locations, thereby preventing short circuit of a solid-state lithium metal battery.