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    HYBRID BATTERY HAVING IMPROVED THERMAL STABILITY AND POWER PERFORMANCE
    12.
    发明公开
    HYBRID BATTERY HAVING IMPROVED THERMAL STABILITY AND POWER PERFORMANCE 审中-公开

    公开(公告)号：US20240055593A1

    公开(公告)日：2024-02-15

    申请号：US17980179

    申请日：2022-11-03

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yong LU ,  Haijing LIU ,  Jingyuan LIU ,  Meiyuan WU ,  Dewen KONG

    IPC: H01M4/525 ,  H01M4/505 ,  H01M4/58 ,  H01M10/0525

    CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/028

    Abstract: The present disclosure provides an electrochemical device that cycles lithium ions. The electrochemical device includes at least one first cell unit and at least one second cell unit. The at least one first cell unit includes a nickel-rich positive electroactive material. The nickel-rich positive electroactive material can be represented by:


    LiM1xM2yM3zM4(1-x-y-z)O2

    where M1, M2, M3, and M4 are each a transition metal independently selected from the group consisting of: nickel, manganese, cobalt, aluminum, and combinations thereof, where 0≤x≤1, 0≤y≤1, and 0≤z≤1. The at least one second cell unit includes a phosphate-based positive electroactive material. The phosphate-based electroactive material can be selected from the group consisting of: lithium manganese iron phosphates (LiMnxFe1-xPO4, where 0≤x≤1) (LMFP), lithium vanadium oxygen phosphates (LixVOPO4, where 0≤x≤1), lithium vanadium phosphates, lithium vanadium fluorophosphates, and combinations thereof.

    THICK ELECTRODES FOR ELECTROCHEMICAL CELLS
    15.
    发明申请
    THICK ELECTRODES FOR ELECTROCHEMICAL CELLS 有权

    公开(公告)号：US20220173377A1

    公开(公告)日：2022-06-02

    申请号：US17539901

    申请日：2021-12-01

    Applicant: GM Global Technology Operations LLC

    Inventor： Dewen KONG ,  Xiaochao QUE ,  Haijing LIU ,  Xiaosong HUANG ,  Mark W. VERBRUGGE ,  Meiyuan WU

    IPC: H01M4/136 ,  H01M4/58 ,  H01M4/66 ,  H01M4/62 ,  H01M10/0525

    Abstract: The present disclosure relates to high capacity (e.g., areal capacity greater than about 4 mAh/cm2 to less than or equal to about 50 mAh/cm2) electrodes for electrochemical cells. An example electrode may include a current collector (e.g., meshed current collector) and one or more electroactive material layers having thicknesses greater than about 150 μm to less than or equal to about 5 mm. The electroactive material layers may each include lithium manganese iron phosphate (LiMnxFe1-xPO4, where 0≤x≤1) (LMFP). The electrode may further include one or more electronically conductive adhesive layers disposed between the current collector and the electroactive material layers. The adhesive layers may include one or more polymer components and one or more conductive fillers. The electroactive material layers may be gradient layers, where sublayers closer to the current collector has a lower porosity than layers further from the current collector.

    DIRECT CURRENT FAST CHARGE METHOD FOR CHARGING BATTERY CELLS INCLUDING LITHIUM SILICON OXIDE (LSO)
    17.
    发明公开
    DIRECT CURRENT FAST CHARGE METHOD FOR CHARGING BATTERY CELLS INCLUDING LITHIUM SILICON OXIDE (LSO) 审中-公开

    公开(公告)号：US20240305122A1

    公开(公告)日：2024-09-12

    申请号：US18361253

    申请日：2023-07-28

    Applicant: GM Global Technology Operations LLC

    Inventor： Dewen KONG ,  Si Chen ,  Haijing Liu ,  Mark W. Verbrugge

    IPC: H02J7/00

    CPC classification number: H02J7/007182 ,  H02J7/0048 ,  H02J7/007194

    Abstract: A method includes determining a state of charge (SOC) of the battery and charging the battery using a plurality of charging steps. If the SOC of the battery is less than a predetermined SOC, the battery is charged at a first charge rate (C-rate) in a range from 3 C to 4 C in a first step until the SOC of the battery increases by a first ΔSOC. After the first ΔSOC, the battery is charged in the constant current mode at a second C-rate of 3−(1/n) C in a second step to (2+n−1)th step until the SOC of the battery increases by a second ΔSOC, where n is an integer greater than zero. After the second ΔSOC, the battery is charged in the constant current mode at a third C- rate of 2+ (1/n) C in a (2+n)th step until the SOC of the battery increases by a third ΔSOC.

    MODIFIED BINDERS FOR ELECTROCHEMICAL CELLS THAT CYCLE LITHIUM IONS AND METHODS OF FORMING THE SAME
    18.
    发明公开
    MODIFIED BINDERS FOR ELECTROCHEMICAL CELLS THAT CYCLE LITHIUM IONS AND METHODS OF FORMING THE SAME 审中-公开

    公开(公告)号：US20240113300A1

    公开(公告)日：2024-04-04

    申请号：US18070090

    申请日：2022-11-28

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yong LU ,  Meiyuan WU ,  Dewen KONG ,  Haijing LIU

    IPC: H01M4/62 ,  C08L27/18 ,  H01M10/0525

    CPC classification number: H01M4/623 ,  C08L27/18 ,  H01M10/0525 ,  C08L2207/53

    Abstract: The present disclosure provides a modified binder for use in an electrochemical cell that cycles lithium ions. The modified binder includes one or more agglomerates of polytetrafluoroethylene nanoparticles, where each of the polytetrafluoroethylene nanoparticles includes a polytetrafluoroethylene core and a polymeric shell that is disposed on exposed surfaces of the core. The polymeric shell can include a polymer selected from the group consisting of: polyethylene oxide, polyglycidyl methacrylate, polyvinylidene difluoride, fluoride-hexafluoropropylene, polypropylene oxide, polyacrylonitrile, polymethacrylonitrile, polymethyl methacrylate, derivatives and co-polymers, and combinations thereof, and in certain instances, also a humidity tolerant lithium salt. The polytetrafluoroethylene core can have a first particle size ranging from about 10 nanometers to about 500 nanometers, the polymeric shell can have an average thickness ranging from about 10 nanometers to about 1,000 nanometers, and each of the one or more agglomerates can have an average size ranging from about 100 micrometers about 1,000 micrometers.

    ELECTROLYTE ADDITIVES FOR CAPACITOR-ASSISTED BATTERY
    19.
    发明公开
    ELECTROLYTE ADDITIVES FOR CAPACITOR-ASSISTED BATTERY 审中-公开

    公开(公告)号：US20230411687A1

    公开(公告)日：2023-12-21

    申请号：US17877011

    申请日：2022-07-29

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Dewen KONG ,  Haijing LIU ,  Lidan XING

    IPC: H01M10/0567 ,  H01M16/00 ,  H01G11/50 ,  H01G11/58

    CPC classification number: H01M10/0567 ,  H01M16/00 ,  H01M2004/028 ,  H01G11/58 ,  H01M2300/0025 ,  H01G11/50

    Abstract: A capacitor-assisted battery is provided. The capacitor-assisted battery includes an electrolyte system having a lithium-ion conducting component and one or more additives. The one or more additives include a first additive that includes 3-trimethylsilylphenylboronic acid, and a second additive that includes succinic anhydride. The capacitor-assisted battery includes an electrode having an electroactive material and a capacitor material. The electroactive material has a first coating defined thereon, and the capacitor material has a second coating defined thereon. The first and second coatings are defined by the first and second additives. The first coating is a substantially continuous that covers greater than or equal to about 80%, of a total exposed surface area of the electroactive material. The second coating is a discontinuous coating covers greater than or equal to about 20% to less than or equal to about 80% of a total exposed surface area of capacitor material.

    CAPACITOR-ASSISTED BATTERY CELL
    20.
    发明公开
    CAPACITOR-ASSISTED BATTERY CELL 审中-公开

    公开(公告)号：US20230291037A1

    公开(公告)日：2023-09-14

    申请号：US17732618

    申请日：2022-04-29

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Dewen KONG ,  Dave G. Rich ,  Xiaochao Que ,  Haijing Liu

    IPC: H01M16/00 ,  H01M4/133 ,  H01M4/62 ,  H01M10/056 ,  H01M4/587 ,  H01M10/0525

    CPC classification number: H01M16/00 ,  H01M4/133 ,  H01M4/623 ,  H01M4/625 ,  H01M10/056 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021

    Abstract: A pouch-type, capacitor-assisted battery cell includes: N negative electrodes, where N is an integer greater than one, each of the N negative electrodes includes a first current collector, first particulate electrode material, and a first tab; P positive electrodes, where: P-M ones of the P positive electrodes include a second current collector, second particulate electrode material, and a second tab, M ones of the P positive electrodes include a third current collector, third particulate electrode material including activated carbon (AC) arranged on opposite sides of the third current collector, and a third tab, and P=N−1 and M=2; separators arranged between the N negative electrodes and the P positive electrodes; and a pouch enclosure surrounding the N negative electrodes, the P positive electrodes and the separators; where the M ones of the P positive electrodes are located approximately equidistant from a center of the P positive electrodes.

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