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    GEL POLYMER ELECTROLYTE WITH SULFOLENE ADDITIVE
    7.
    发明公开
    GEL POLYMER ELECTROLYTE WITH SULFOLENE ADDITIVE 审中-公开

    公开(公告)号：US20240014440A1

    公开(公告)日：2024-01-11

    申请号：US17900048

    申请日：2022-08-31

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Qili SU ,  Zhe LI ,  Haijing LIU ,  Lidan XING ,  Lijiao QUAN

    IPC分类号： H01M10/0565

    CPC分类号： H01M10/0565 ,  H01M10/0525

    摘要： The present disclosure a gel polymer electrolyte for an electrochemical cell that cycles lithium ions. The gel polymer electrolyte includes a polymer host, a liquid electrolyte, and greater than or equal to about 0.1 wt. % to less than or equal to about 10 wt. % of a sulfolene additive. In certain variations, the gel polymer electrolyte also includes greater than or equal to about 0.1 wt. % to less than or equal to about 5 wt. % of an ethylene carbonate additive. The ethylene carbonate additive may be selected from the group consisting of: vinyl ethylene carbonate (VEC), fluoroethylene carbonate (FEC), vinylene carbonate, and combinations thereof. In each instance, the lithium electrolyte may include a first lithium salt, a second lithium salt that is distinct from the first lithium salt, and a third lithium salt that is distinct from the first lithium salt and the second lithium salt.

    Thin Solid-State Electrolyte Having High Ionic Conductivity
    8.
    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

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Zhe LI ,  Yong LU ,  Meiyuan WU ,  Haijing LIU

    IPC分类号： H01M10/0565 ,  H01M10/0525

    CPC分类号： H01M10/0565 ,  H01M10/0525 ,  H01M2300/0082

    摘要： 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
    9.
    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

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Zhe LI ,  Yong LU ,  Haijing LIU ,  Meiyuan WU

    IPC分类号： H01M10/0562 ,  H01M4/04

    摘要： 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
    10.
    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

    申请人： GM Global Technology Operations LLC

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

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

    摘要： 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.