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    Methods of forming lithium-silicon alloys for electrochemical cells
    1.
    发明授权
    Methods of forming lithium-silicon alloys for electrochemical cells 有权

    公开(公告)号：US12074313B2

    公开(公告)日：2024-08-27

    申请号：US17037986

    申请日：2020-09-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xiaosong Huang ,  Zhongyi Liu

    IPC: H01M4/1395 ,  B22F9/10 ,  H01M10/0525

    CPC classification number: H01M4/1395 ,  B22F9/10 ,  H01M10/0525 ,  B22F2301/054 ,  B22F2304/10

    Abstract: Methods 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. Centrifugally distributing the precursor includes 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.

    Method of manufacturing a crystalline aluminum-iron-silicon alloy
    2.
    发明授权
    Method of manufacturing a crystalline aluminum-iron-silicon alloy 有权

    公开(公告)号：US11085109B2

    公开(公告)日：2021-08-10

    申请号：US15905223

    申请日：2018-02-26

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhongyi Liu ,  Daad B. Haddad ,  Tengjiao Qi

    IPC: C22F1/00 ,  C22C1/04 ,  C22C30/00 ,  B22F3/02 ,  B22F9/04

    Abstract: A method of manufacturing a crystalline aluminum-iron-silicon alloy and a crystalline aluminum-iron-silicon alloy part. An aluminum-, iron-, and silicon-containing composite powder is provided that includes an amorphous phase and a first crystalline phase having a hexagonal crystal structure at ambient temperature. The composite powder is heated at a temperature in the range of 850° C. to 950° C. to transform at least a portion of the amorphous phase into the first crystalline phase and to transform the composite powder into a crystalline aluminum-iron-silicon (Al—Fe—Si) alloy. The first crystalline phase is a predominant phase in the crystalline Al—Fe—Si alloy.

    Rapidly solidified high-temperature aluminum iron silicon alloys
    5.
    发明授权
    Rapidly solidified high-temperature aluminum iron silicon alloys 有权

    公开(公告)号：US10294552B2

    公开(公告)日：2019-05-21

    申请号：US15384889

    申请日：2016-12-20

    Applicant: GM Global Technology Operations LLC

    Inventor： Zhongyi Liu ,  Anil K. Sachdev

    IPC: C22C45/08 ,  C22C1/00

    Abstract: Methods of making high-strength, lightweight alloy components capable of high temperature performance comprising aluminum, silicon, and iron and/or nickel are provided. A high-energy stream, such as a laser or electron beam, may be selectively directed towards a precursor material to melt a portion of the precursor material in a localized region. The molten precursor material is cooled at a rate of greater than or equal to about 1.0×105 K/second to form a solid high-strength, lightweight alloy component comprising a stable ternary cubic phase having high heat resistance and high strength. The stable ternary phase may be AlxFeySiz, where x ranges from about 4 to about 5 or about 7.2 to about 7.6, y is about 1.5 to about 2.2, and z is about 1. The stable ternary phase may also be Al6Ni3Si. Materials and components, such as automotive components, made from such methods are also provided.

    LIGHTWEIGHT DUAL-PHASE ALLOYS
    6.
    发明申请
    LIGHTWEIGHT DUAL-PHASE ALLOYS 审中-公开

    公开(公告)号：US20180237890A1

    公开(公告)日：2018-08-23

    申请号：US15436198

    申请日：2017-02-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhongyi Liu ,  Frederick E. Pinkerton

    IPC: C22C30/00 ,  C22C1/04 ,  B33Y70/00 ,  B22F9/04

    Abstract: According to aspects of the present disclosure, a ternary alloy includes a dual-phase microstructure including a first phase and a second phase. The first phase defines a hexagonal close-packed structure with a stoichiometric ratio of Al4Fe1.7Si. The second phase defines a face-centered cubic structure with a stoichiometric ratio of Al3Fe2Si. The dual-phase microstructure is stable above about 800° C., and the dual-phase microstructure has a first-phase abundance greater than about 50 parts by weight and a second-phase abundance less than about 50 parts by weight based on 100 parts by weight of the ternary alloy.

    METHODS FOR FORMING NEGATIVE ELECTRODE ACTIVE MATERIALS FOR LITHIUM-BASED BATTERIES
    8.
    发明申请
    METHODS FOR FORMING NEGATIVE ELECTRODE ACTIVE MATERIALS FOR LITHIUM-BASED BATTERIES 有权
    用于形成用于锂基电池的负极电极活性材料的方法

    公开(公告)号：US20160020453A1

    公开(公告)日：2016-01-21

    申请号：US14332184

    申请日：2014-07-15

    Applicant: GM Global Technology Operations LLC

    Inventor： Zhongyi Liu ,  Xingcheng Xiao ,  Michael K. Carpenter

    IPC: H01M4/04 ,  H01M4/583 ,  H01M4/36 ,  H01M4/1391 ,  H01M4/38

    CPC classification number: H01M4/0402 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/386 ,  H01M4/583 ,  H01M4/625 ,  H01M2004/027 ,  H01M2220/10 ,  H01M2220/30

    Abstract: In an example method, a transition metal precursor is selected so its transition metal has a diffusion rate that is slower than a diffusion rate of silicon. An aqueous mixture is formed by dissolving the precursor in an aqueous medium, and adding silicon particles to the medium. The mixture is exposed to a hydroxide, which forms a product including the silicon particles and a transition metal hydroxide precipitate. The product is dried. In an inert or reducing environment, silicon atoms of the silicon particles in the dried product are caused to diffuse out of, and form voids in and/or at a surface of, the particles. At least some silicon atoms react with the transition metal hydroxide in the dried product to form i) a SiOx (0

    Abstract translation: 在示例性方法中，选择过渡金属前体，使得其过渡金属具有比硅的扩散速率慢的扩散速率。 通过将前体溶解在水性介质中并将硅颗粒添加到介质中来形成含水混合物。 将混合物暴露于氢氧化物，其形成包括硅颗粒和过渡金属氢氧化物沉淀物的产物。 产品干燥。 在惰性或还原环境中，使干燥产物中的硅颗粒的硅原子扩散到颗粒内和/或表面上形成空隙。 至少一些硅原子与干燥产物中的过渡金属氢氧化物反应以形成i）硅颗粒上的SiO x（0

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