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    ENCAPSULATED LITHIUM TITANATE FOR LITHIUM ION BATTERIES
    4.
    发明申请
    ENCAPSULATED LITHIUM TITANATE FOR LITHIUM ION BATTERIES 审中-公开

    公开(公告)号：US20200295396A1

    公开(公告)日：2020-09-17

    申请号：US16086282

    申请日：2016-03-31

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhongyi LIU ,  Zhiqiang YU

    IPC: H01M10/0525 ,  H01M4/485 ,  H01M4/36 ,  H01M10/0563

    Abstract: A lithium ion battery including an electrolyte and a lithium titanate negative electrode is provided. The lithium titanate negative electrode includes structures of a lithium titanate core and a conformal layer surrounding each lithium titanate core. The conformal layer either includes titanium oxide with substantially no lithium or has a concentration of lithium ranging from a lower concentration at a surface portion of the layer to a higher concentration at an interior portion of the layer adjacent to the lithium titanate core. A method of preparing the lithium titanate structures and a method of preparing an electrode for a lithium ion battery, wherein the electrode includes lithium titanate structures, are also provided.

    METHODS OF BRIQUETTING PRECURSOR MATERIALS FOR PRELITHIATED SILICON ACTIVE MATERIALS
    6.
    发明申请
    METHODS OF BRIQUETTING PRECURSOR MATERIALS FOR PRELITHIATED SILICON ACTIVE MATERIALS 有权

    公开(公告)号：US20210296633A1

    公开(公告)日：2021-09-23

    申请号：US16826041

    申请日：2020-03-20

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhongyi LIU ,  Xiaosong HUANG ,  James R. SALVADOR

    IPC: H01M4/134 ,  B22F3/03 ,  B22F1/00 ,  H01M4/04

    Abstract: A method of making a lithiated silicon-based precursor material for a negative electrode material of an electrochemical cell that cycles lithium ions is provided. An admixture comprising a plurality of lithium particles and a plurality of silicon particles is briquetted by applying pressure of greater than or equal to about 10 MPa and applying heat at a temperature of less than or equal to about 180° C. to form a precursor briquette. The briquette has lithium particles and silicon particles distributed in a matrix and has a porosity level of less than or equal to about 60% of the total volume of the precursor briquette. The briquetting is conducted in an environment having less than or equal to about 0.002% by weight of any oxygen-bearing species or nitrogen (N2).

    PRE-LITHIATED SILICON PARTICLES AND METHODS OF FORMING THE SAME
    7.
    发明申请
    PRE-LITHIATED SILICON PARTICLES AND METHODS OF FORMING THE SAME 有权

    公开(公告)号：US20220302435A1

    公开(公告)日：2022-09-22

    申请号：US17204126

    申请日：2021-03-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xiaosong HUANG ,  Zhongyi LIU ,  Bradley R. FRIEBERG

    IPC: H01M4/1395 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/36 ,  H01M4/04

    Abstract: The present disclosure provides a method of making a negative electrode material for an electrochemical cell that cycles lithium ions. The method includes centrifugally distributing a precursor including silicon, lithium, and an additional metal (M) selected from the group consisting of: aluminum (Al), chromium (Cr), titanium (Ti), niobium (Nb), molybdenum (Mo), zirconium (Zr), yttrium (Y), cerium (Ce), and combinations thereof by contacting the precursor with a rotating surface in a centrifugal atomizing reactor and solidifying the precursor to form a plurality of substantially round solid electroactive particles that include Li4.4xSixMy, where x is greater than 0 to less than or equal to about 0.85 and y corresponds to a weight percent of M that is greater than or equal to 0.1 wt. % to less than or equal to about 10 wt. %.

    METHODS OF FORMING LITHIUM-SILICON ALLOYS FOR ELECTROCHEMICAL CELLS
    8.
    发明申请
    METHODS OF FORMING LITHIUM-SILICON ALLOYS FOR ELECTROCHEMICAL CELLS 有权

    公开(公告)号：US20220102712A1

    公开(公告)日：2022-03-31

    申请号：US17037986

    申请日：2020-09-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xiaosong HUANG ,  Zhongyi LIU

    IPC: H01M4/38 ,  H01M10/0525 ,  B22F9/10

    Abstract: Method for forming prelithiated electroactive materials are provided. Methods include preparing a precursor that includes lithium and silicon and centrifugally distributing the precursor using a centrifugal atomizing reactor. Methods for preparing the precursor include contacting a first mixture including lithium and having a first temperature and a second mixture including silicon and having a second temperature in a mixing chamber to form a precursor. The first mixture and the second mixture each enters the mixing chamber at a pressure greater than or equal to about 10 PSI. The second temperature is greater than the first temperature. The method may further include centrifugally distributing the precursor by contacting the precursor with a rotating surface in a centrifugal atomizing reactor and solidifying the precursor to form a plurality of substantially round solid electroactive particles including lithium and silicon and having D50 diameters of less than or equal to about 30 micrometers.

    METHODS OF FORMING PRELITHIATED SILICON ALLOY ELECTROACTIVE MATERIALS
    9.
    发明申请
    METHODS OF FORMING PRELITHIATED SILICON ALLOY ELECTROACTIVE MATERIALS 有权

    公开(公告)号：US20210175491A1

    公开(公告)日：2021-06-10

    申请号：US16706351

    申请日：2019-12-06

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Bradley R. FRIEBERG ,  Xiaosong HUANG ,  Zhongyi LIU ,  Mark W. VERBRUGGE

    IPC: H01M4/1395 ,  H01M10/0525 ,  H01M4/04

    Abstract: A method of making a negative electrode material for an electrochemical cell that cycles lithium ions is provided that includes centrifugally distributing a molten precursor comprising silicon and lithium by contacting the molten precursor with a rotating surface in a centrifugal atomizing reactor. The molten precursor is solidified to form a plurality of substantially round solid electroactive particles comprising an alloy of lithium and silicon and having a D50 diameter of less than or equal to about 20 micrometers. In certain variations, the negative electroactive material particles may further have one or more coatings disposed thereon, such as a carbonaceous coating and/or an oxide-based coating.

    NICKEL-RICH ELECTROACTIVE MATERIALS
    10.
    发明公开
    NICKEL-RICH ELECTROACTIVE MATERIALS 审中-公开

    公开(公告)号：US20240243259A1

    公开(公告)日：2024-07-18

    申请号：US18094163

    申请日：2023-01-06

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Mengyuan CHEN ,  Zhongyi LIU ,  Bradley R. FRIEBERG ,  Xiaosong HUANG ,  Nicholas Paul William PIECZONKA

    IPC: H01M4/36 ,  C01G53/00 ,  H01M4/505 ,  H01M4/525

    CPC classification number: H01M4/366 ,  C01G53/50 ,  H01M4/505 ,  H01M4/525 ,  C01P2002/54 ,  C01P2004/86 ,  C01P2006/40

    Abstract: An electroactive material for an electrochemical cell includes one or more conductive oxygen storage material coatings or layers. The electroactive material includes a plurality of electroactive material particles disposed to form an electroactive material layer. In certain variations, at least a portion of the plurality of electroactive material particles may have a coating that includes a conductive oxygen storage material. In other variations, a conductive oxygen storage material layer may be disposed on one or more surfaces of the electroactive material layer. In still other variations, at least a portion of the plurality of electroactive material particles may have a coating that includes a conductive oxygen storage material, and a conductive oxygen storage material layer may be disposed on one or more surfaces of the electroactive material layer. The one or more conductive oxygen storage material coatings or layers may help to improve the thermal stability of the electroactive materials.

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