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    ELECTROLYTE AND LITHIUM BASED BATTERIES
    71.
    发明申请
    ELECTROLYTE AND LITHIUM BASED BATTERIES 有权
    基于电解质和锂离子电池

    公开(公告)号：US20160172711A1

    公开(公告)日：2016-06-16

    申请号：US14617463

    申请日：2015-02-09

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Li Yang ,  Mei Cai ,  Qiangfeng Xiao ,  Fang Dai ,  Mark W. Verbrugge

    IPC: H01M10/0569 ,  H01M10/0567 ,  H01M4/134 ,  H01M10/0525

    CPC classification number: H01M10/0569 ,  H01M4/134 ,  H01M4/386 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2004/027 ,  H01M2300/0034 ,  H01M2300/0037

    Abstract: An example electrolyte includes a solvent mixture, a lithium salt, a non-polymerizing solid electrolyte interface (SEI) precursor additive, and a solvent additive. The solvent mixture includes dimethyl carbonate (DMC) and fluoroethylene carbonate (FEC) present in a volume to volume ratio ranging from 20 to 1 to 1 to 20. The non-polymerizing SEI precursor additive is present in an amount ranging from greater than 0 wt % to about 10 wt % of a total wt % of the electrolyte, and the solvent additive is present in an amount ranging from greater than 0 wt % to about 10 wt % of the total wt % of the electrolyte.

    Abstract translation: 示例性电解质包括溶剂混合物，锂盐，非聚合固体电解质界面（SEI）前体添加剂和溶剂添加剂。 溶剂混合物包括体积与体积比范围为20-1:1至20的碳酸二甲酯（DMC）和氟代碳酸亚乙酯（FEC）。非聚合SEI前体添加剂以大于0wt 至约10重量％的电解质的总重量％，并且溶剂添加剂以大于电解质总重量％的0重量％至约10重量％的量存在。

    Method for forming sulfur-containing electrode using salt additive
    78.
    发明授权
    Method for forming sulfur-containing electrode using salt additive 有权

    公开(公告)号：US11342549B2

    公开(公告)日：2022-05-24

    申请号：US16743650

    申请日：2020-01-15

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Shuru Chen ,  Fang Dai ,  Mei Cai

    IPC: H01M4/04 ,  H01M4/139 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/62 ,  H01M4/02

    Abstract: The present disclosure relates to sulfur-containing electrodes and methods for forming the same. For example, the method may include disposing an electroactive material on or near a current collector to form an electroactive material layer having a first porosity and applying pressure and heat to the electroactive material layer so that the electroactive material layer has a second porosity. The first porosity is greater than the second porosity. The electroactive material may include a plurality of electroactive material particles and one or more salt additives. The method may further include contacting the electroactive material layer and an electrolyte such that the electrolyte dissolves the plurality of one or more salt particles so that the electroactive material layer has a third porosity. The third porosity may be greater than the second porosity and less than the first porosity.

    Sulfur-based composite cathode-separator laminations and battery cells comprising the same
    80.
    发明授权
    Sulfur-based composite cathode-separator laminations and battery cells comprising the same 有权

    公开(公告)号：US11171359B2

    公开(公告)日：2021-11-09

    申请号：US16446569

    申请日：2019-06-19

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Mei Cai ,  Fang Dai ,  Shuru Chen ,  Biqiong Wang

    IPC: H01M10/0565 ,  H01M4/36 ,  H01M10/0525

    Abstract: Composite cathode-separator laminations (CSL) include a current collector with sulfur-based host material applied thereto, a coated separator comprising an electrolyte membrane separator with a carbonaceous coating, and a porous, polymer-based interfacial layer (PBIL) forming a binding interface between the carbonaceous coating and the host material. The host material includes less than about 6% polymeric binder, and less than about 40% electrically conductive carbon, with the balance comprising one or more sulfur compounds. The PBIL can have a thickness of less than about 5 μm and a porosity of about 5% to about 40%. The host material can comprise less than about 40% conductive carbon (e.g., graphene) and have a porosity of less than about 40%. The carbonaceous coating (e.g., graphene) can have a thickness of about 1 μm to about 5 μm. The CSL can be disposed with an anode within an electrolyte to form a lithium-sulfur battery cell.

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