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    Methods of preparing lithium metal anodes
    83.
    发明授权
    Methods of preparing lithium metal anodes 有权

    公开(公告)号：US10608241B2

    公开(公告)日：2020-03-31

    申请号：US15955319

    申请日：2018-04-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Michael P. Balogh ,  Hongliang Wang ,  Fang Dai ,  Tengjiao Qi

    IPC: H01M4/04 ,  H01M4/139 ,  H01M4/1395 ,  H01M4/134 ,  H01M4/40 ,  H01M4/66

    Abstract: A lithium-based electrode assembly and methods of formation relating thereto are provided. The lithium-based electrode assembly comprises a metal current collector, an electrode comprising lithium metal, and an intermediate layer disposed therebetween. The intermediate layer comprising an intermetallic compound comprising the lithium metal of the electrode and a metal selected from the group consisting of: aluminum, silver, gold, barium, bismuth, boron, calcium, cadmium, carbon, gallium, germanium, mercury, indium, iridium, lead, palladium, platinum, rhodium, antimony, selenium, silicon, tin, strontium, sulfur, tellurium, zinc, and combinations thereof. The method of forming the lithium assembly includes coating a surface of the metal current collector with the intermediate layer; disposing the electrode onto an exposed surface of the intermediate layer; and heating the electrode, the intermediate layer, and the metal current collector to form the lithium intermetallic compound, which joins the metal current collector and the electrode together.

    METHOD OF MANUFACTURING AN ELECTROCHEMICAL CELL
    86.
    发明申请
    METHOD OF MANUFACTURING AN ELECTROCHEMICAL CELL 审中-公开

    公开(公告)号：US20190207201A1

    公开(公告)日：2019-07-04

    申请号：US16131853

    申请日：2018-09-14

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Fang Dai ,  Shuru Chen ,  Meinan He ,  Mei Cai

    IPC: H01M4/04 ,  H01M10/0585 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/48 ,  H01M4/58 ,  H01M4/1395

    Abstract: In a method of manufacturing an electrochemical cell, a porous or non-porous electrically conductive metal substrate may be provided. A conformal metal chalcogenide layer may be formed on a surface of the metal substrate. The metal substrate with the conformal metal chalcogenide layer may be immersed in a nonaqueous liquid electrolyte solution comprising a lithium salt dissolved in a polar aprotic organic solvent. An electrical potential may be established between the metal substrate and a counter electrode immersed in the nonaqueous liquid electrolyte solution such that lithium ions in the electrolyte solution are reduced to metallic lithium and deposited on the surface of the metal substrate over the metal chalcogenide layer to form a conformal lithium metal layer on the surface of the metal substrate over the metal chalcogenide layer.

    HYBRID METAL-ORGANIC FRAMEWORK SEPARATORS FOR ELECTROCHEMICAL CELLS
    87.
    发明申请
    HYBRID METAL-ORGANIC FRAMEWORK SEPARATORS FOR ELECTROCHEMICAL CELLS 审中-公开

    公开(公告)号：US20190089006A1

    公开(公告)日：2019-03-21

    申请号：US15710326

    申请日：2017-09-20

    Applicant: GM Global Technology Operations LLC

    Inventor： Li Yang ,  Mei Cai ,  Anne M. Dailly ,  Fang Dai

    IPC: H01M10/14 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/525

    Abstract: A hybrid separator for an electrochemical cell is provided, along with methods of making the hybrid separator. The hybrid separator includes a first metal-organic framework comprising copper and having a plurality of first pores and a second distinct metal-organic framework comprising indium or zinc and having a plurality of second pores. The hybrid separator is capable of adsorbing one or more lithium salts in at least one of the plurality of first pores or the plurality of second pores so as to be ionically conductive. The hybrid separator may have a conductivity greater than or equal to about 0.1 mS/cm to less than or equal to about 1 mS/cm and is substantially free of any polymeric binder.

    ELECTROLYTE SYSTEM FOR SILICON-CONTAINING ELECTRODES
    90.
    发明申请
    ELECTROLYTE SYSTEM FOR SILICON-CONTAINING ELECTRODES 审中-公开

    公开(公告)号：US20180309169A1

    公开(公告)日：2018-10-25

    申请号：US15491089

    申请日：2017-04-19

    Applicant: GM Global Technology Operations LLC

    Inventor： Li Yang ,  Mei Cai ,  Peng Lu ,  Fang Dai

    IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/131 ,  H01M4/48

    Abstract: Electrochemical cells that cycle lithium ions are provided. The electrochemical cells have an electrode that includes a silicon-containing electroactive material that undergoes volumetric expansion and contraction during the cycling of the electrochemical cell; and an electrolyte system that promotes passive formation of a flexible protective layer comprising a lithium fluoride-polymer composite on one or more exposed surface regions of the silicon-containing electroactive material. The electrolyte system includes a lithium salt, at least one cyclic carbonate, and two or more linear carbonates. At least one of the two or more linear carbonate-containing co-solvents is a fluorinated carbonate-containing co-solvent. The electrolyte system accommodates the volumetric expansion and contraction of the silicon-containing electroactive material to promote long term cycling stability.

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