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28 条记录 (耗时 0.024 秒)

    ELECTROCHEMICAL DEVICES INCLUDING INTERNAL EDDY CURRENT HEATING
    5.
    发明申请
    ELECTROCHEMICAL DEVICES INCLUDING INTERNAL EDDY CURRENT HEATING 有权

    公开(公告)号：US20220200077A1

    公开(公告)日：2022-06-23

    申请号：US17561031

    申请日：2021-12-23

    申请人： GM Global Technology Operations LLC

    发明人： Jingyuan LIU ,  Dewen KONG ,  Dave G. RICH ,  Haijing LIU ,  Lyall K. WINGER ,  Mark W. VERBRUGGE

    IPC分类号： H01M10/615 ,  H01M50/569

    摘要： An electrochemical device according to various aspects of the present disclosure includes an electrochemical cell and an inductor coil. The electrochemical cell includes a current collector. the current collector includes an electrically-conductive material. The inductor coil is configured to generate a magnetic field. The magnetic field is configured to induce an eddy current in the current collector to generate heat in the current collector. In various aspects, the present disclosure also provides a method of internally heating an electrochemical cell. In various aspects, the present disclosure also provides a method of controlling heating of an electrochemical cell.

    METHODS OF FORMING PRELITHIATED SILICON ALLOY ELECTROACTIVE MATERIALS
    6.
    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

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

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

    摘要： 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.

    CAPACITOR-ASSISTED GRADIENT ELECTRODES
    7.
    发明申请
    CAPACITOR-ASSISTED GRADIENT ELECTRODES 有权

    公开(公告)号：US20210151260A1

    公开(公告)日：2021-05-20

    申请号：US16685389

    申请日：2019-11-15

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Dewen KONG ,  Xiaochao QUE ,  Meiyuan WU ,  Si CHEN ,  Haijing LIU ,  Mark W. VERBRUGGE

    IPC分类号： H01G11/06 ,  H01G11/34 ,  H01G11/24 ,  H01G11/46 ,  H01G11/72 ,  H01G11/86 ,  H01M10/0525

    摘要： A capacitor-assisted electrode for an electrochemical cell that cycles lithium ions is provided. The capacitor-assisted electrode may include at least two electroactive materials disposed on one or more surfaces of a current collector. A first electroactive material of the at least two electroactive materials may have a first reversible specific capacity and forms a first electroactive material having a first press density. A second electroactive material of the at least two electroactive materials has a second reversible specific capacity and forms a second electroactive material having a second press density. The second reversible specific capacity may be different from the first reversible specific capacity. The second press density may be different from the first press density. One or more capacitor materials may be disposed on or intermingled with one or more of the at least two electroactive materials.

    METHODS OF PRE-LITHIATING ELECTRODES
    8.
    发明申请
    METHODS OF PRE-LITHIATING ELECTRODES 有权

    公开(公告)号：US20210066704A1

    公开(公告)日：2021-03-04

    申请号：US16559132

    申请日：2019-09-03

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Mark W. VERBRUGGE ,  Xingcheng XIAO ,  Jiagang XU

    IPC分类号： H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/136 ,  H01M4/36 ,  H01M4/38 ,  H01M10/052

    摘要： The present disclosure provides methods of compensation for capacity loss resulting from cycle-induced lithium consumption in an electrochemical cell including at least one electrode. Such methods may include adding a lithiation additive to the at least one electrode so as to create a lithium source. The lithium source compensates for cycle-induced lithiation loss such that the electrochemical cell having the lithiation additive experiences total capacity losses of less than or equal to about 5% of an initial capacity prior to cycling of lithium. The lithiation additive includes a lithium silicate represented by the formula LiuHr, where Hr=Liy-uSiOz and where 0≤y≤3.75 and 0≤z≤2 and u is a useable portion of y, 0≤u≤y. The lithium source may include z/4 Li4SiO4 and LimSi, where 0≤m≤4.4.

    MULTIFUNCTIONAL HYBRID COATINGS FOR ELECTRODES MADE BY ATOMIC LAYER DEPOSITION TECHNIQUES
    9.
    发明申请
    MULTIFUNCTIONAL HYBRID COATINGS FOR ELECTRODES MADE BY ATOMIC LAYER DEPOSITION TECHNIQUES 有权
    用于原子层沉积技术的电极多功能混合涂料

    公开(公告)号：US20150180023A1

    公开(公告)日：2015-06-25

    申请号：US14138267

    申请日：2013-12-23

    申请人： GM Global Technology Operations LLC

    发明人： Xingcheng XIAO ,  Mark W. VERBRUGGE ,  John S. WANG

    IPC分类号： H01M4/36 ,  H01M4/04 ,  H01M4/583 ,  H01M4/48 ,  H01M4/38 ,  H01M4/485

    CPC分类号： H01M4/366 ,  H01M4/0402 ,  H01M4/0423 ,  H01M4/0428 ,  H01M4/48 ,  H01M4/485 ,  H01M4/582 ,  H01M4/583 ,  H01M4/622 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

    摘要： An electroactive material for use in an electrochemical cell, like a lithium ion battery, is provided. The electroactive material comprises a multifunctional hybrid protective coating system formed over an electroactive material. The coating system includes a first oxide-based coating disposed on one or more surfaces of the electroactive material, followed by a second coating deposited via a non-aqueous process. The second coating may be a fluoride-based, nitride-based, or carbide-based coating. The first and second coatings may be applied by atomic layer deposition (ALD) to form conformal ultrathin layers over the electroactive materials. Such a multifunctional hybrid protective coating system can suppress formation of gases within the electrochemical cell and also minimize formation of solid electrolyte interface (SEI) layers on the electrode to improve battery performance. Methods for making such materials and using such materials in electrochemical cells are likewise provided.

    摘要翻译： 提供了用于电化学电池中的电活性材料，如锂离子电池。 电活性材料包括在电活性材料上形成的多功能混合保护涂层系统。 涂层系统包括设置在电活性材料的一个或多个表面上的第一氧化物基涂层，随后是通过非水性方法沉积的第二涂层。 第二涂层可以是氟化物基，氮化物基或碳化物基涂层。 第一和第二涂层可以通过原子层沉积（ALD）来施加，以在电活性材料上形成保形超薄层。 这种多功能混合保护涂层系统可以抑制电化学电池内的气体的形成，并且还使电极上的固体电解质界面（SEI）层的形成最小化以改善电池性能。 同样提供了制造这种材料并在电化学电池中使用这种材料的方法。