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    BIPOLAR SOLID-STATE BATTERY WITH ENHANCED INTERFACIAL CONTACT
    22.
    发明申请
    BIPOLAR SOLID-STATE BATTERY WITH ENHANCED INTERFACIAL CONTACT 有权

    公开(公告)号：US20220263055A1

    公开(公告)日：2022-08-18

    申请号：US17550507

    申请日：2021-12-14

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Mengyan HOU ,  Qili SU ,  Meiyuan WU ,  Haijing LIU

    IPC分类号： H01M4/04 ,  H01M10/0585 ,  H01M10/0565

    摘要： A method for forming a bipolar solid-state battery may include preparing a plurality of freestanding gels each comprising a polymer, a solvent, and a lithium salt and, also, positioning a first freestanding gel between a first electrode and a second electrode and a second freestanding gel between the second electrode and a third electrode. Each of the first electrode, the second electrode, and the third electrode may include a plurality of electroactive particles. The method may also include infiltrating at least a portion of the first free-standing gel into a space between particles of the first electrode and the second electrode and at least a portion of the second free-standing gel into a space between the particles of second electrode and the third electrode.

    THICK ELECTRODES FOR ELECTROCHEMICAL CELLS
    23.
    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

    申请人： GM Global Technology Operations LLC

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

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

    摘要： 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.

    CAPACITOR-ASSISTED ELECTROCHEMICAL DEVICES HAVING HYBRID STRUCTURES
    24.
    发明申请
    CAPACITOR-ASSISTED ELECTROCHEMICAL DEVICES HAVING HYBRID STRUCTURES 有权

    公开(公告)号：US20210135224A1

    公开(公告)日：2021-05-06

    申请号：US17084782

    申请日：2020-10-30

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Mengyan HOU ,  Haijing LIU ,  Qili SU ,  Xiaochao QUE

    IPC分类号： H01M4/62 ,  H01M2/26

    摘要： A hybrid electrochemical device including at least two electrically connected solid-state electrochemical cells is provided. Each electrochemical cell includes a first outer electrode having a first current collector and a first electroactive layer, a second outer electrode having a second current collector and a second electroactive layer, and one or more intervening electrodes disposed between the electroactive layers. At least one of the intervening electrodes includes one or more capacitor additives. The first outer electrode is electrically connected to at least one of the intervening electrodes in a first electrical configuration. The second outer electrode is electrically connected to at least one of the intervening electrodes in a second electrical configuration. The at least two electrochemical cells are electrically connected in a third electrical configuration. The first and second electrical configurations are the same and the third electrical configuration is distinct from the first and second electrical configurations.

    SOLID-STATE ELECTROLYTES AND METHODS FOR MAKING THE SAME
    25.
    发明申请
    SOLID-STATE ELECTROLYTES AND METHODS FOR MAKING THE SAME 有权

    公开(公告)号：US20210111426A1

    公开(公告)日：2021-04-15

    申请号：US16786469

    申请日：2020-02-10

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Zhe LI ,  Yong LU ,  Xiaochao QUE ,  Haijing LIU

    IPC分类号： H01M10/0562 ,  H01M10/0525

    摘要： The present disclosure relates to solid-state electrolytes and methods of making the same. The method includes admixing a sulfate precursor including one or more of Li2SO4 and Li2SO4.H2O with one or more carbonaceous capacitor materials. The first admixture is calcined to form an electrolyte precursor that is admixed with one or more additional components to form the solid-state electrolyte. When a ratio of the sulfate precursor to the one or more carbonaceous capacitor materials in the first admixture is about 1:2, the electrolyte precursor consists essentially of Li2S. When a ratio of the sulfate precursor to the one or more carbonaceous capacitor materials in the first admixture is less than about 1:2, the electrolyte precursor is a composite precursor including a solid-state capacitor cluster including the one or more carbonaceous capacitor materials and a sulfide coating including Li2S disposed on one or more exposed surfaces of the solid-state capacitor cluster.

    LITHIUM CELL ELECTRODE USING SURFACE-MODIFIED COPPER FOIL CURRENT COLLECTOR
    27.
    发明申请
    LITHIUM CELL ELECTRODE USING SURFACE-MODIFIED COPPER FOIL CURRENT COLLECTOR 审中-公开

    公开(公告)号：US20200173028A1

    公开(公告)日：2020-06-04

    申请号：US16783240

    申请日：2020-02-06

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Haijing LIU ,  Zhiqiang YU ,  Xiaochao QUE

    IPC分类号： C23C18/12 ,  H01M4/66 ,  H01M4/04 ,  C23C22/00

    摘要： A copper foil, intended for use as a current collector in a lithium-containing electrode for a lithium-based electrochemical cell, is subjected to a series of chemical oxidation and reduction processing steps to form a field of integral copper wires extending outwardly from the surfaces of the current collector (and from the copper content of the foil) to be coated with a resin-bonded porous layer of particles of active electrode material. The copper wires serve to anchor thicker layers of porous electrode material and enhance liquid electrolyte contact with the electrode particles and the current collector to improve the energy output of the cell and its useful life.

    MODIFIED BINDERS FOR ELECTROCHEMICAL CELLS THAT CYCLE LITHIUM IONS AND METHODS OF FORMING THE SAME
    30.
    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

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Yong LU ,  Meiyuan WU ,  Dewen KONG ,  Haijing LIU

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

    CPC分类号： H01M4/623 ,  C08L27/18 ,  H01M10/0525 ,  C08L2207/53

    摘要： 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.