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    Thin Solid-State Electrolyte Having High Ionic Conductivity
    2.
    发明公开
    Thin Solid-State Electrolyte Having High Ionic Conductivity 审中-公开

    公开(公告)号：US20230299342A1

    公开(公告)日：2023-09-21

    申请号：US17884226

    申请日：2022-08-09

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhe LI ,  Yong LU ,  Meiyuan WU ,  Haijing LIU

    IPC: H01M10/0565 ,  H01M10/0525

    CPC classification number: H01M10/0565 ,  H01M10/0525 ,  H01M2300/0082

    Abstract: A free-standing electrolyte layer for use in an electrochemical cell is provided. The free-standing electrolyte layer includes a plurality of solid-state electrolyte particles, a (first) ionic liquid that surrounds each solid-state electrolyte particle of the plurality of solid-state electrolyte particles, and a plurality of polytetrafluoroethylene fibrils that provides a structural framework for the solid-state electrolyte particles. The free-standing electrolyte layer has an ionic conductivity greater than or equal to about 0.1 mS/cm at 40° C., and a thickness greater than or equal to about 5 micrometers to less than or equal to about 500 micrometers. Each of the polytetrafluoroethylene fibrils of the plurality of polytetrafluoroethylene fibrils has an average length of greater than or equal to about 2 micrometers to less than or equal to about 100 micrometers. The electrochemical cell may include one or more electrodes including a (second) ionic liquid and/or plurality of polytetrafluoroethylene (PTFE) fibrils.

    ARGYRODITE SOLID ELECTROLYTES FOR SOLID-STATE BATTERIES AND METHODS OF MAKING THE SAME
    3.
    发明申请
    ARGYRODITE SOLID ELECTROLYTES FOR SOLID-STATE BATTERIES AND METHODS OF MAKING THE SAME 有权

    公开(公告)号：US20230024667A1

    公开(公告)日：2023-01-26

    申请号：US17707524

    申请日：2022-03-29

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhe LI ,  Yong LU ,  Haijing LIU ,  Meiyuan WU

    IPC: H01M10/0562 ,  H01M4/04

    Abstract: The present disclosure provides a method for making a solid-state argyrodite electrolyte represented by Li6PS5X (where X is selected from chloride, bromide, iodine, or a combination thereof) having an ionic conductivity greater than or equal to about 1.0×10−4 S/cm to less than or equal to about 10×10−3 S/cm at about 25° C. The method may include contacting a first suspension and a first solution to form a precursor, where the first suspension is a Li3PS4 suspension including an ester solvent and the first solution is a Li2S and LiX (where X is selected from chloride, bromide, or iodine, or a combination thereof) solution including an alcohol solvent; and removing the ester solvent and the alcohol solvent from the precursor to form the solid-state argyrodite electrolyte.

    FABRICATION PROCESS TO MAKE ELECTRODES BY ROLLING
    4.
    发明申请
    FABRICATION PROCESS TO MAKE ELECTRODES BY ROLLING 有权

    公开(公告)号：US20220173370A1

    公开(公告)日：2022-06-02

    申请号：US17539811

    申请日：2021-12-01

    Applicant: GM Global Technology Operations LLC

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

    IPC: H01M4/04 ,  H01M10/058 ,  H01M4/1397 ,  H01M4/30

    Abstract: A method of manufacturing an electrode for an electrochemical cell includes providing an admixture including an electroactive material, a binder, and a solvent. The method further includes rolling the admixture to form a sheet and forming a multi-layer stack from the sheet. The method further includes forming an electrode film precursor by performing a plurality of sequential rollings, each including rolling the stack through a first gap. The plurality of sequential rollings includes first and second rollings. In the first rolling, the stack is in a first orientation. In the second rolling, the stack is in a second orientation different from the first orientation. The method further includes forming an electrode film by rolling the electrode film precursor through a second gap less than or equal to the first gap. The method further includes drying the electrode film to remove at least a portion of the solvent.

    HYBRID BATTERY HAVING IMPROVED THERMAL STABILITY AND POWER PERFORMANCE
    6.
    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.

    FREE-STANDING, THIN ELECTROLYTE LAYERS
    7.
    发明公开
    FREE-STANDING, THIN ELECTROLYTE LAYERS 审中-公开

    公开(公告)号：US20240021865A1

    公开(公告)日：2024-01-18

    申请号：US17939527

    申请日：2022-09-07

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhe LI ,  Meiyuan WU ,  Qili SU ,  Yong LU ,  Haijing LIU

    IPC: H01M10/0562 ,  H01M10/0525 ,  H01M10/058

    CPC classification number: H01M10/0562 ,  H01M10/0525 ,  H01M10/058 ,  H01M2300/008

    Abstract: An electrochemical cell that includes a first electrode, a second electrode, and an electrolyte layer that is disposed between the first electrode and the second electrode is provided. The electrolyte layer includes a porous scaffold having a porosity greater than or equal to about 50 vol. % to less than or equal to about 90 vol. %, and a solution-processable solid-state electrolyte that at least partially fills the pores of the porous scaffold. The porous scaffold is defined by a plurality of fibers having an average diameter greater than or equal to about 0.01 micrometer to less than or equal to about 10 micrometers and an average length greater than or equal to about 1 micrometer to less than or equal to about 20 micrometers. The solution-processable solid-state electrolyte includes is selected from the group consisting of: sulfide-based solid-state particles, halide-based solid-state particles, hydride-based solid-state particles, and combinations thereof.

    POLYMERIC GEL ELECTROLYTES FOR HIGH-POWER BATTERIES
    8.
    发明公开
    POLYMERIC GEL ELECTROLYTES FOR HIGH-POWER BATTERIES 审中-公开

    公开(公告)号：US20230253618A1

    公开(公告)日：2023-08-10

    申请号：US17884419

    申请日：2022-08-09

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhe LI ,  Qili SU ,  Meiyuan WU ,  Haijing LIU

    IPC: H01M10/0565

    CPC classification number: H01M10/0565 ,  H01M2300/0082

    Abstract: A polymeric gel electrolyte for an electrochemical cell, such as a solid-state battery, is provided herein as well an electrochemical cell including the polymeric gel electrolyte. The polymeric gel electrolyte includes one or more lithium salts, a plasticizer component, an additive component, and a polymeric host. Examples of the plasticizer component include a carbonate, a lactone, a nitrile, a sulfone, an ether, a phosphate, and combinations thereof. The additive component includes a boron-containing additive and a carbonate-containing additive.

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