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    PLATINUM-CONTAINING CATALYST SYSTEMS
    11.
    发明申请
    PLATINUM-CONTAINING CATALYST SYSTEMS 有权

    公开(公告)号：US20210053033A1

    公开(公告)日：2021-02-25

    申请号：US16547100

    申请日：2019-08-21

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Gongshin QI ,  Wei LI ,  Se H. OH ,  Ming YANG

    IPC: B01J23/42 ,  B01J33/00 ,  B01D53/94 ,  F01N3/10

    Abstract: The present disclosure provides a method for operating a three-way catalyst system at high temperatures. The method includes passing a high-temperature exhaust stream exiting an engine over a thermally stable three-way catalyst system including a metal oxide support; two or more catalytically active metals disposed on the support; and a porous metal oxide coating disposed on one or more exposed surfaces of the support. At least one of the catalytically active metals may be platinum (Pt). The method further includes reducing an amount of the nitrogen oxides (NOx), carbon monoxide (CO), and non-methane hydrocarbons (HCs) in an effluent stream exiting the thermally stable three-way catalyst system so that the effluent stream has a combined amount of nitrogen oxides (NOx) and non-methane hydrocarbons (HCs) of less than or equal to about 30 mg/mile and less than or equal to about 0.5 g/mile of carbon monoxide (CO).

    ELECTROLYTES FOR LITHIUM-RICH, LAYERED CATHODES
    12.
    发明公开
    ELECTROLYTES FOR LITHIUM-RICH, LAYERED CATHODES 审中-公开

    公开(公告)号：US20240145774A1

    公开(公告)日：2024-05-02

    申请号：US17978462

    申请日：2022-11-01

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Lei WANG ,  Gongshin QI ,  Jiazhi HU ,  Colin JAMISON ,  Nicole ELLISON

    IPC: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0569

    CPC classification number: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2004/028 ,  H01M2300/0034 ,  H01M2300/0037

    Abstract: An electrode for an electrochemical cell includes an electroactive material and an electrolyte that includes a lithium-salt additive and a solvent. The electroactive material is represented by:


    xLi2MnO3·(1−x)LiMO2

    where M is a transition metal selected from the group consisting of: nickel (Ni), manganese (Mn), cobalt (Co), aluminum (Al), iron (Fe), and combinations thereof and 0.01≤x≤0.99. The solvent is selected from the group consisting of: ethylene carbonate (EC), fluoroethylene carbonate (FEC), dimethyl carbonate (DMC), diethyl carbonate (DEC), ethylmethylcarbonate (EMC), ethylmethylcarbonate (EMC), ethylene carbonate (EC), propylene carbonate (PC), vinyl ethylene carbonate (VEC), tetramethylene sulfone (TMS), ethyl methyl sulfone (EMS), acetonitrile (AN), butyronitrile (BN), and combinations thereof. The electrolyte includes between about 0.001 wt. % and about 10 wt. % of the lithium-salt additive and has an overall salt concentration between about 0.1 mol/L and about 10 mol/L. In certain variations, the lithium-salt additive includes lithium difluorophosphate (LiPO2F2).

    ELECTROACTIVE MATERIALS FOR ELECTROCHEMICAL CELLS AND METHODS OF FORMING THE SAME
    13.
    发明公开
    ELECTROACTIVE MATERIALS FOR ELECTROCHEMICAL CELLS AND METHODS OF FORMING THE SAME 审中-公开

    公开(公告)号：US20240072242A1

    公开(公告)日：2024-02-29

    申请号：US17897959

    申请日：2022-08-29

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Meng JIANG ,  Gongshin QI ,  Louis G. HECTOR, JR.

    IPC: H01M4/36 ,  H01M4/04

    CPC classification number: H01M4/364 ,  H01M4/0404 ,  H01M4/623

    Abstract: A method for forming an electrode for an electrochemical cell that cycles lithium ions is provided. The method includes contacting a precursor electroactive material and a conductive material to a polymeric solution including a first solvent and a binder material to form a first admixture; applying a mixing force to the first admixture to form a first mixture; drying the first mixture to form a plurality of electroactive material agglomerates, each agglomerate including an electroactive material particle in contact with the conductive material via the binder material; contacting the plurality of electroactive material agglomerates to a second solvent to form a second admixture, the binder material being insoluble in the second solvent; applying a mixing force to the second admixture to form a second mixture; and disposing the second mixture on or near one or more surfaces of a current collector to form the electrode.

    ELECTROLYTE ADDITIVES FOR LITHIUM-RICH, LAYERED CATHODES
    14.
    发明公开
    ELECTROLYTE ADDITIVES FOR LITHIUM-RICH, LAYERED CATHODES 审中-公开

    公开(公告)号：US20240006660A1

    公开(公告)日：2024-01-04

    申请号：US17853363

    申请日：2022-06-29

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Lei WANG ,  Gongshin QI ,  Jiazhi HU

    IPC: H01M10/0567 ,  H01M4/131 ,  H01M10/0525

    CPC classification number: H01M10/0567 ,  H01M4/131 ,  H01M10/0525

    Abstract: An electrode for an electrochemical cell that cycles lithium ions is provided. The electrode includes an electroactive material represented by:


    xLi2MnO3·(1-x)LiMO2

    where M is a transition metal selected from the group consisting of: nickel (Ni), manganese, cobalt, aluminum, iron, and combinations thereof and 0.01≤x≤0.99. The electrode also includes an electrolyte additive selected from the group consisting of: a lithium salt additive, a phosphite-based additive, a phosphate-based additive, a borate-based additive, succinonitrile, magnesium bis(trifluoromethanesulfonyl)imide, calcium bis(trifluoromethanesulfonyl)imide, and combinations thereof. For example, the electrolyte additive may be selected from the group consisting of: lithium difluorophosphate, lithium difluoro(oxalato)borate, lithium bis(trifluoromethanesulfonyl)imide, lithium bis(oxalato)borate, lithium 4,5-dicyano-2-(trifluoromethyl)imidazolide, tris(trimethylsilyl)phosphite, tris(2,2,2-trifluoroethyl)phosphite, tris(trimethylsilyl)phosphate, triethyl phosphate, trimethyl borate, tris(trimethylsilyl)borate, tris(pentafluorophenyl)borane, succinonitrile, magnesium bis(trifluoromethanesulfonyl)imide, calcium bis(trifluoromethanesulfonyl)imide, and combinations thereof.

    METHOD FOR MAKING SILICON-CARBON COMPOSITE ELECTRODE MATERIALS
    15.
    发明申请
    METHOD FOR MAKING SILICON-CARBON COMPOSITE ELECTRODE MATERIALS 有权

    公开(公告)号：US20210135194A1

    公开(公告)日：2021-05-06

    申请号：US16668864

    申请日：2019-10-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Lei WANG ,  Gongshin QI ,  Wei LI

    IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/38 ,  H01M4/587

    Abstract: The present disclosure provides a method of forming an electrode material for use in an electrochemical cell that cycles lithium ions. The method includes contacting a catalyst precursor with one or more electroactive materials to form a mixture. The catalyst precursor includes one or more metal salts. The method may also include activating the catalyst precursor in the mixture to form an activated mixture including an activated catalyst; and/or contacting one or more carbonaceous materials with the activated mixture to form the electrode material. The electrode material includes one or more electroactive particles that may be carbon coated disposed within a carbonaceous structure.

    LITHIUM-CONTAINING PARTICLE COATINGS FOR POSITIVE ELECTROACTIVE MATERIALS
    19.
    发明公开
    LITHIUM-CONTAINING PARTICLE COATINGS FOR POSITIVE ELECTROACTIVE MATERIALS 审中-公开

    公开(公告)号：US20230369568A1

    公开(公告)日：2023-11-16

    申请号：US17742037

    申请日：2022-05-11

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Gongshin QI ,  Wei LI

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

    CPC classification number: H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028

    Abstract: A positive electrode material is provided. The positive electrode material includes an electroactive material core and an electrochemically active coating that surrounds the electroactive material core. The electroactive material core includes Li1+xM1−xO2, where 0≤x≤0.5 and M is selected from the group consisting of: nickel (Ni), manganese (Mn), iron (Fe), tungsten (W), molybdenum (Mo), vanadium (V), zirconium (Zr), niobium (Nb), aluminum (Al), magnesium (Mg), and combinations thereof. The electrochemically active coating includes Li1+xM′1−xO2, where 0≤x≤0.2 and M′ is selected from the group consisting of: nickel (Ni), manganese (Mn), iron (Fe), tungsten (W), molybdenum (Mo), vanadium (V), zirconium (Zr), niobium (Nb), aluminum (Al), magnesium (Mg), and combinations thereof. The electrochemically active coating is a distinct composition from the electroactive material core.

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