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    ELECTROCHEMICAL CELLS AND METHODS FOR MAKING THE SAME
    2.
    发明公开
    ELECTROCHEMICAL CELLS AND METHODS FOR MAKING THE SAME 审中-公开

    公开(公告)号：US20240222789A1

    公开(公告)日：2024-07-04

    申请号：US18092957

    申请日：2023-01-04

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xingcheng Xiao ,  Meinan He ,  Mei Cai

    IPC: H01M50/434 ,  H01M10/0525 ,  H01M50/403

    CPC classification number: H01M50/434 ,  H01M10/0525 ,  H01M50/403

    Abstract: Electrochemical cells and methods for making electrochemical cells are provided. In one example, an electrochemical cell includes a positive electrode, a negative electrode, and a separator that is disposed between the positive and negative electrodes. The separator is electrically insulating and ionically conductive. An electrolyte is operatively disposed between the positive and negative electrodes and interfaces with the separator to conduct ions between the positive and negative electrodes. A porous ceramic powder impregnated with an intermediate oxidation state alkali metal compound is coupled to one of the separator and the positive electrode.

    MULTIFUNCTIONAL ELECTRODE SEPARATOR ASSEMBLIES WITH BUILT-IN REFERENCE ELECTRODES AND THERMAL ENHANCEMENTS
    4.
    发明公开
    MULTIFUNCTIONAL ELECTRODE SEPARATOR ASSEMBLIES WITH BUILT-IN REFERENCE ELECTRODES AND THERMAL ENHANCEMENTS 审中-公开

    公开(公告)号：US20230291077A1

    公开(公告)日：2023-09-14

    申请号：US17689220

    申请日：2022-03-08

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jing Gao ,  Brian J. Koch ,  Xingcheng Xiao ,  Mark W. Verbrugge

    IPC: H01M50/46 ,  H01M50/449 ,  H01M50/491 ,  H01M10/48 ,  B60K1/04

    CPC classification number: H01M50/46 ,  H01M50/449 ,  H01M50/491 ,  H01M10/48 ,  B60K1/04 ,  H01M2220/20

    Abstract: Presented are electrochemical devices with in-stack reference electrodes, methods for making/using such devices, and battery cells with stacked electrodes segregated by electrode separator assemblies including thermal barriers and built-in reference electrodes. An electrochemical device, such as a lithium-class secondary battery cell, includes an insulated and sealed housing with an ion-conducting electrolyte located inside the housing. A stack of working electrodes is also located inside the device housing, in electrochemical contact with the electrolyte. At least one electrode separator assembly is located inside the device housing, interposed between a neighboring pair of (anode and cathode) working electrodes. The electrode separator assembly includes a separator layer fabricated with an electrically insulating material that is sufficiently porous to transmit therethrough the ions of the electrolyte. An electrically conductive current collector (CC) layer, a thermally insulating thermal barrier (TB) layer, and an active electrode reference electrode (RE) layer are attached to the separator layer.

    Solvent-free dry powder process to incorporate ceramic particles into electrochemical cell components
    8.
    发明授权
    Solvent-free dry powder process to incorporate ceramic particles into electrochemical cell components 有权

    公开(公告)号：US11557758B2

    公开(公告)日：2023-01-17

    申请号：US16863655

    申请日：2020-04-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jin Liu ,  Xingcheng Xiao ,  Meinan He ,  Mei Cai

    IPC: H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

    Abstract: Solvent-free methods of making a component, like an electrode, for an electrochemical cell are provided. A particle mixture is processed in a dry-coating device having a rotatable vessel defining a cavity with a rotor. The rotatable vessel is rotated at a first speed in a first direction and the rotor at a second speed in a second opposite direction. The particle mixture includes first inorganic particles (e.g., electroactive particles), second inorganic particles (e.g., ceramic HF scavenging particles), and third particles (e.g., electrically conductive carbon-containing particles). The dry coating creates coated particles each having a surface coating (including second inorganic particles and third particles) disposed over a core region (the first inorganic particle). The coated particles are mixed with polymeric particles in a planetary and centrifugal mixer that rotates about a first axis and revolves about a second axis. The polymeric particles surround each of the plurality of coated particles.

    LITHIUM BATTERY INCLUDING COMPOSITE FLAME RETARDANT PARTICLES
    9.
    发明申请
    LITHIUM BATTERY INCLUDING COMPOSITE FLAME RETARDANT PARTICLES 有权

    公开(公告)号：US20220200039A1

    公开(公告)日：2022-06-23

    申请号：US17128905

    申请日：2020-12-21

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xingcheng Xiao ,  Mei Cai ,  Sherman H. Zeng

    IPC: H01M10/0525 ,  H01M4/36 ,  H01M50/414 ,  H01M50/46 ,  H01M50/491 ,  H01M50/446

    Abstract: An electrochemical cell for a lithium battery includes a negative electrode, a positive electrode, a polymeric separator, and composite flame retardant particles including a particulate host material and a flame retardant material carried by the particulate host material. The composite flame retardant particles may be positioned within the electrochemical cell along a lithium-ion transport path or an electron transport path that extends through or between one or more components of the electrochemical cell. The composite flame retardant particles may be positioned within polymeric portions of a laminate structure that defines a housing in which the electrochemical cell is enclosed.

    COMPOSITE ELECTRODE MATERIALS AND METHODS OF MAKING THE SAME
    10.
    发明申请
    COMPOSITE ELECTRODE MATERIALS AND METHODS OF MAKING THE SAME 有权

    公开(公告)号：US20220069280A1

    公开(公告)日：2022-03-03

    申请号：US17005559

    申请日：2020-08-28

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xingcheng Xiao ,  Mark W. Verbrugge

    IPC: H01M4/133 ,  H01M4/134 ,  H01M4/38 ,  H01M4/1395 ,  H01M4/04 ,  H01M4/36 ,  H01M4/60 ,  H01M10/0525 ,  H01M4/1393

    Abstract: A composite electrode material may include a carbon-based matrix component and a silicon-based particulate component embedded in the carbon-based matrix component. The silicon-based particulate component may include a plurality of core-shell structures, with each core-shell structure including: a silicon core, an intermetallic layer overlying the core, and a graphitic shell surrounding the silicon core and the intermetallic layer. In a method of making the composite electrode material, a metal catalyst layer may be deposited on a plurality of silicon particles to form a plurality of precursor structures in particle form. The precursor structures may be dispersed in organic polymeric material to form a precursor electrode material, which may be heated in an inert environment to pyrolyze the organic polymeric material and transform the precursor electrode material into a composite electrode material.

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