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    SILICON-BASED ELECTROACTIVE MATERIALS FOR SODIUM-ION BATTERIES AND METHODS OF MANUFACTURING THE SAME
    1.
    发明申请
    SILICON-BASED ELECTROACTIVE MATERIALS FOR SODIUM-ION BATTERIES AND METHODS OF MANUFACTURING THE SAME 有权

    公开(公告)号：US20250158044A1

    公开(公告)日：2025-05-15

    申请号：US18506173

    申请日：2023-11-10

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Sayed Youssef Sayed NAGY ,  Jeffrey David CAIN

    IPC: H01M4/38 ,  H01M4/02 ,  H01M4/04 ,  H01M4/62 ,  H01M4/66 ,  H01M10/054

    Abstract: A negative electrode of a battery that cycles sodium ions includes a silicon-based electroactive material including two-dimensional silicon layers having a hexagonal crystal structure. The silicon-based electroactive material is configured to intercalate sodium ions between the two-dimensional silicon layers during charge of the battery and form an alloy of silicon and sodium. The silicon-based electroactive material is manufactured by extracting alkali metal ions and/or alkaline earth metal ions from a silicide precursor including two-dimensional silicon layers having a hexagonal crystal structure and spaced apart from one another by planar monolayers of alkali metal ions and/or alkaline earth metal ions. The alkali metal ions and/or the alkaline earth metal ions are extracted from the silicide precursor such that the hexagonal crystal structure of the two-dimensional silicon layers is retained in the silicon-based electroactive material.

    METHODS OF LITHIATING ELECTROACTIVE MATERIALS
    4.
    发明公开
    METHODS OF LITHIATING ELECTROACTIVE MATERIALS 审中-公开

    公开(公告)号：US20240213438A1

    公开(公告)日：2024-06-27

    申请号：US18087421

    申请日：2022-12-22

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jeffrey David CAIN ,  Thomas E. MOYLAN ,  Sayed Youssef Sayed NAGY ,  Nicholas Paul William PIECZONKA ,  Yuntao GU

    IPC: H01M4/04

    CPC classification number: H01M4/0459

    Abstract: A method for forming an electroactive material includes sourcing a current or voltage to an electrochemical reactor that includes a cation source, an electrolyte mixture, and an electroactive material precursor in contact with one another, where the current or voltage serves to ionize and form cations at the cation source that react with the electroactive material precursor in the electrolyte mixture to form the electroactive material. The method may include one or more filtering steps, one or more rinsing steps, or a combination of one or more filtering steps and one or more rinsing steps to collect the electroactive material from the electrolyte.

    ELECTRODE ASSEMBLIES PREPARED USING DIFFUSION COUPLING
    5.
    发明公开
    ELECTRODE ASSEMBLIES PREPARED USING DIFFUSION COUPLING 审中-公开

    公开(公告)号：US20240047693A1

    公开(公告)日：2024-02-08

    申请号：US17879419

    申请日：2022-08-02

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jeffrey David CAIN ,  Thomas E. MOYLAN ,  Caleb REESE ,  Sayed Youssef Sayed NAGY ,  Andrew Clay BOBEL

    IPC: H01M4/66 ,  H01M4/04

    CPC classification number: H01M4/661 ,  H01M4/0471 ,  H01M4/0423

    Abstract: An electrode assembly that includes a current collector, a lithium foil, and a solid solution interface that chemically binds the current collector and the lithium foil is provided. The solid solution interface includes a portion of the current collector that is impregnated with lithium atoms diffused from the lithium foil. In some variations, a method for forming the electrode assembly includes heating a precursor electrode assembly that includes a current collector and a lithium metal film to a temperature that is less than a melting point of lithium, so that lithium atoms diffuse into the current collector during the heating. In other variations, a method for forming the electrode assembly includes disposing a molten lithium onto a heated current collector to form a precursor electrode assembly, and cooling the assembly to form a lithium metal layer that is chemically bonded to the current collector.

    COMPOSITE ELECTRODES INCLUDING EMBEDDED POROUS CURRENT COLLECTORS AND METHODS OF MANUFACTURING THE SAME
    9.
    发明公开
    COMPOSITE ELECTRODES INCLUDING EMBEDDED POROUS CURRENT COLLECTORS AND METHODS OF MANUFACTURING THE SAME 审中-公开

    公开(公告)号：US20240258526A1

    公开(公告)日：2024-08-01

    申请号：US18103129

    申请日：2023-01-30

    Applicant: GM Global Technology Operations LLC

    Inventor： Sayed Youssef Sayed NAGY ,  Meng JIANG ,  Thomas E. MOYLAN ,  Jeffrey David CAIN ,  Caleb REESE ,  Anil K. SACHDEV

    IPC: H01M4/62 ,  H01M4/04 ,  H01M4/66

    CPC classification number: H01M4/625 ,  H01M4/0404 ,  H01M4/661

    Abstract: A composite electrode for an electrochemical cell that cycles lithium ions may include a metal current collector having a three-dimensional porous structure defining an interconnected network of open pores and an electrode material disposed within the open pores of the current collector. An oxygen-containing reactive layer may be formed on surfaces of the current collector and an electrode precursor mixture may be deposited thereon and dried to form a solid electrode material having a continuous structure within the open pores of the current collector. The electroactive material particles and/or the electrically conductive agent may interact with the oxygen-containing reactive layer on the metal current collector to form an oxygen-containing adhesive layer along an interface between the current collector and the solid electrode material. The electroactive material particles and the electrically conductive agent may be chemically bonded to the current collector via hydrogen bonds within the oxygen-containing adhesive layer.

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