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    ELECTROLYTE FILM WITH LOW INTERFACIAL RESISTANCE
    32.
    发明公开
    ELECTROLYTE FILM WITH LOW INTERFACIAL RESISTANCE 审中-公开

    公开(公告)号：US20230411685A1

    公开(公告)日：2023-12-21

    申请号：US17901279

    申请日：2022-09-01

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Qili SU ,  Zhi LI ,  Dewen KONG ,  Haijing LIU

    IPC: H01M10/0565

    CPC classification number: H01M10/0565 ,  H01M2300/0085

    Abstract: The present disclosure provides an electrolyte layer for use in an electrochemical cell that cycles lithium ions. The electrolyte layer includes a porous film that defines a plurality of voids and includes a plurality of solid-state electrolyte particles and a plurality of polymeric fibrils that connect the solid-state electrolyte particles. The electrolyte layer also includes a gel polymeric electrolyte that at least partially fills the plurality of voids in the porous film. The porous film has a thickness greater than or equal to about 2 micrometers to less than or equal to about 100 micrometers, and a porosity greater than or equal to about 10 vol. % to less than or equal to about 50 vol. %. The a gel polymeric electrolyte fills greater than or equal to about 0.1% to less than or equal to about 150% of a total porosity of the porous film.

    COBALT-FREE, HIGH-POWER ELECTROCHEMICAL CELL
    33.
    发明公开
    COBALT-FREE, HIGH-POWER ELECTROCHEMICAL CELL 审中-公开

    公开(公告)号：US20230343951A1

    公开(公告)日：2023-10-26

    申请号：US17855028

    申请日：2022-06-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Dewen KONG ,  Haijing LIU

    IPC: H01M4/525 ,  H01M4/62 ,  H01M4/587 ,  H01M4/505 ,  H01M10/0525

    CPC classification number: H01M4/525 ,  H01M4/623 ,  H01M4/587 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/028

    Abstract: An electrochemical cell includes a positive electrode including 90 wt. % to 98 wt. % of a cobalt-free electroactive material. represented by LiNixM1-xO2 (where M is manganese, aluminum, magnesium, zirconium, chromium, or a combination thereof and x≥0.75), 0.05 wt. % to 3 wt. % a polytetrafluoroethylene (PTFE) binder having a molecular weight (MW) greater than or equal to about 6,000,000 u, and 1 wt. % to 5 wt. % of a first electronically conductive material. The electrochemical cell also includes a negative electrode including 90 wt. % to 98 wt. % of a graphite-containing negative electroactive material, 0.05 wt. % to 3 wt. % a polytetrafluoroethylene (PTFE) binder having a molecular weight (MW) greater than or equal to about 6,000,000 u, 0.05 wt. % to 2 wt. % of an ancillary binder, and 1 wt. % to 5 wt. % of a second electronically conductive material.

    COMPOSITE NEGATIVE ELECTRODE MATERIALS AND ELECTROCHEMICAL CELLS INCLUDING THE SAME
    34.
    发明公开
    COMPOSITE NEGATIVE ELECTRODE MATERIALS AND ELECTROCHEMICAL CELLS INCLUDING THE SAME 审中-公开

    公开(公告)号：US20230307655A1

    公开(公告)日：2023-09-28

    申请号：US17738794

    申请日：2022-05-06

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Dewen KONG ,  Qili SU ,  Meiyuan WU ,  Haijing LIU

    IPC: H01M4/62 ,  H01M10/0525

    CPC classification number: H01M4/628 ,  H01M4/623 ,  H01M10/0525 ,  H01M2004/027

    Abstract: A negative electrode for an electrochemical cell that cycles lithium ions includes a particulate component embedded in a polymeric matrix component that comprises polytetrafluoroethylene. The particulate component includes a plurality of composite particles, with each of the composite particles having a core and a selective barrier layer disposed on a surface of the core. The core of each of the composite particles includes an electroactive negative electrode material. The selective barrier layer of each of the composite particles is formulated to prevent or inhibit electrochemical reactions from occurring between lithium stored in the electroactive negative electrode material of the core and the polytetrafluoroethylene in the polymeric matrix component.

    DOUBLE-SIDED ELECTRODES AND ELECTROCHEMICAL CELLS INCLUDING THE SAME
    36.
    发明申请
    DOUBLE-SIDED ELECTRODES AND ELECTROCHEMICAL CELLS INCLUDING THE SAME 有权

    公开(公告)号：US20220367848A1

    公开(公告)日：2022-11-17

    申请号：US17690936

    申请日：2022-03-09

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Dewen KONG ,  Haijing LIU ,  Meiyuan WU ,  Xiaochao QUE ,  Sherman H. ZENG ,  Xiaosong HUANG

    IPC: H01M4/137 ,  H01M4/36

    Abstract: The present disclosure provides an electrochemical cell that includes a double-sided electrode. The double-sided electrode includes a first electroactive material layer, a second electroactive material layer, and a current collector disposed between the first and second electroactive material layers. Each of the first and second electroactive material layers may include a plurality of electroactive material sub-films and a plurality of buffer layers disposed between adjacent electroactive material sub-films. The electrochemical cell further includes a first single-sided electrode substantially aligned with the first electroactive material layer; a first separator physically separating the first single-sided electrode and the first electroactive material layer; a second single-sided electrode substantially aligned with the second electroactive material layer; and a second separator physically separating the second single-sided electrode and the second electroactive material layer. The current collector may include at least one surface coated with an adhesive layer.

    VOLTAGE-MODIFIED HYBRID ELECTROCHEMICAL CELL DESIGN
    38.
    发明申请
    VOLTAGE-MODIFIED HYBRID ELECTROCHEMICAL CELL DESIGN 有权

    公开(公告)号：US20210110980A1

    公开(公告)日：2021-04-15

    申请号：US17069932

    申请日：2020-10-14

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Qili SU ,  Haijing LIU ,  Meiyuan WU ,  Dewen KONG ,  Mengyan HOU

    IPC: H01G11/08 ,  H01G11/28 ,  H01G11/32 ,  H01G11/68 ,  H01G11/46 ,  H01G11/54 ,  H01G11/82

    Abstract: Hybrid lithium-ion electrochemical cells include a first electrode having a first polarity and a first electroactive material that reversibly cycles lithium ions having a first maximum operational voltage and a second electrode having the first polarity with a second electroactive material having a second maximum operational voltage. A difference between the second and first maximum operational voltages defines a predetermined voltage difference. Also included are at least one third electrode including a third electroactive material that reversibly cycles lithium ions having a second polarity opposite to the first polarity, a separator, and electrolyte. A voltage modification component (e.g., diode) is in electrical communication with the first and the second electrodes. In a first operational state corresponding to charging, the at least one voltage modification component is configured to induce a voltage drop corresponding to the predetermined voltage difference providing high power density and high energy density hybrid lithium-ion electrochemical cells.

    METHOD FOR REDUCING RESIDUAL WATER CONTENT IN BATTERY MATERIAL
    40.
    发明申请
    METHOD FOR REDUCING RESIDUAL WATER CONTENT IN BATTERY MATERIAL 审中-公开

    公开(公告)号：US20180198115A1

    公开(公告)日：2018-07-12

    申请号：US15740258

    申请日：2015-06-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhiqiang YU ,  Dewen KONG ,  Haijing LIU

    IPC: H01M4/04 ,  H01M10/052 ,  H01M4/36 ,  H01M4/62

    CPC classification number: H01M4/0471 ,  H01M4/04 ,  H01M4/366 ,  H01M4/625 ,  H01M10/052

    Abstract: A method for reducing residual water content in a battery material includes placing the battery material having residual water adsorbed therein in a channel substantially sealed from an ambient environment. A gaseous mixture is caused to flow through the battery material in the channel. The gaseous mixture includes an organic solvent vapor present in an amount effective to hydrogen bond with at least some water molecules from the battery material. The gaseous mixture is caused to flow through the battery material for a predetermined amount of time, at a predetermined temperature, and at a predetermined pressure. The organic solvent vapor having at least some water molecules bonded thereto is removed from the battery material. The removing takes place for a predetermined amount of time, at a predetermined temperature, and at a predetermined pressure, thereby forming the battery material having reduced residual water content.

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