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    Methods for fabricating silicon-based electrodes comprising naturally occurring carbonaceous filaments and battery cells utilizing the same
    3.
    发明授权
    Methods for fabricating silicon-based electrodes comprising naturally occurring carbonaceous filaments and battery cells utilizing the same 有权

    公开(公告)号：US11316142B2

    公开(公告)日：2022-04-26

    申请号：US16572789

    申请日：2019-09-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Meng Jiang ,  Raghunathan K ,  Ion C. Halalay ,  Mark W. Verbrugge

    IPC: H01M4/134 ,  H01M4/04 ,  H01M4/62 ,  H01M4/38

    Abstract: Methods for fabricating electrodes include coating a current collector with a slurry to form a coated current collector. The slurry includes a dry fraction, including silicon particles, polymeric binders, and one or more types of naturally occurring carbonaceous filaments, and one or more solvents. The coated current collector is heat treated to produce the electrode having a layer of silicon-based host material. The one or more naturally occurring carbonaceous filaments can include animal fibers, chitin, alginate, cellulose, keratin, and chitosan, and can have an average length of 1 μm to 50 μm and an average diameter of 1 nm to 500 nm. The dry fraction can include 5 wt. % to 95 wt. % silicon particles, 0.1 wt. % to 15 wt. % polymeric binders, and 1 wt. % to 20 wt. % naturally occurring carbonaceous filaments. The method can include assembling a battery cell by disposing the electrode and a positive electrode in electrolyte.

    OPERATIONAL VOLTAGE LIMITATIONS FOR BATTERIES
    9.
    发明申请
    OPERATIONAL VOLTAGE LIMITATIONS FOR BATTERIES 有权

    公开(公告)号：US20250001902A1

    公开(公告)日：2025-01-02

    申请号：US18342811

    申请日：2023-06-28

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yongjie Zhu ,  Chunhao J. Lee ,  Meng Jiang ,  Chen-fang Chang ,  Sanjeev M. Naik

    IPC: B60L58/16 ,  B60L50/60 ,  G01R31/367 ,  H01M10/42 ,  H01M10/48

    Abstract: Aspects of the disclosure include a battery management system that actively limits the operational voltage of a cell to avoid a cell pressure surge in response to an indicator of battery cell degradation. An exemplary battery management system can include a memory, computer readable instructions, and one or more processors that perform operations that include: measuring a first cell pressure of a cell of the battery pack at a reference voltage and measuring a second cell pressure of the cell of the battery pack at the reference voltage. A moving average of cell pressure progression is determined from the first cell pressure and the second cell pressure. Responsive to the moving average of cell pressure progression exceeding a cell pressure progression threshold, the cell of the battery pack is identified as a degraded cell and an estimate of remaining cycles for the degraded cell is determined.

    Multilayer siloxane coatings for silicon negative electrode materials for lithium ion batteries
    10.
    发明授权
    Multilayer siloxane coatings for silicon negative electrode materials for lithium ion batteries 有权

    公开(公告)号：US11374218B2

    公开(公告)日：2022-06-28

    申请号：US16547084

    申请日：2019-08-21

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Meng Jiang ,  Lei Wang ,  Raghunathan K

    IPC: H01M4/38 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/02

    Abstract: A negative electroactive material for use in a negative electrode of an electrochemical cell that cycles lithium ions is provided. The negative electroactive material includes a particle defining a core region that includes silicon, silicon-containing alloys, tin-containing alloys, and combinations thereof. A porous, elastomeric multilayer coating is disposed on a surface of the core region that includes a first carbonaceous layer and a second porous elastomeric layer. The second porous elastomeric layer includes siloxane and a plurality of electrically conductive particles. The multilayer coating is capable of reversibly elongating from a contracted state to an expanded state in at least one direction to minimize or prevent fracturing of the plurality of negative electroactive material particles during lithium ion cycling.

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