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    NEGATIVE ELECTRODE FOR A LITHIUM-ION ELECTROCHEMICAL CELL AND METHOD OF FORMING SAME
    2.
    发明申请
    NEGATIVE ELECTRODE FOR A LITHIUM-ION ELECTROCHEMICAL CELL AND METHOD OF FORMING SAME 审中-公开

    公开(公告)号：US20200127292A1

    公开(公告)日：2020-04-23

    申请号：US16165064

    申请日：2018-10-19

    Applicant: GM Global Technology Operations LLC

    Inventor： Ion C. Halalay ,  Raghunathan K

    IPC: H01M4/62 ,  H01M10/0525 ,  H01M2/26 ,  H01M4/66 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/133

    Abstract: A method of forming an electrode includes attaching a tab to a collector to form a pre-tabbed current collector; disposing the pre-tabbed current collector onto a non-stick substrate to form a workpiece; and casting a slurry onto the workpiece to form a film. The slurry includes an active material component, one or more carbon additives, and at least one of a filamentary copper additive and a dendritic copper additive. The method includes drying the film at a first temperature to form a dried film; curing the dried film under pressure at a second higher temperature to form a cured film; removing the cured film from the non-stick substrate to form a precursor film; and carbonizing and annealing the precursor film at a third higher temperature. Carbonizing forms a three-dimensional electrically-conductive network and annealing forms a second contiguous network of copper connected to the active material component to form the electrode.

    LITHIUM ION BATTERY
    5.
    发明申请
    LITHIUM ION BATTERY 有权
    锂离子电池

    公开(公告)号：US20140329143A1

    公开(公告)日：2014-11-06

    申请号：US14336669

    申请日：2014-07-21

    Applicant: GM Global Technology Operations, LLC

    Inventor： Ion C. Halalay ,  Stephen J. Harris ,  Timothy J. Fuller

    IPC: H01M4/62 ,  H01M10/0525 ,  H01M2/16

    CPC classification number: H01M4/628 ,  H01M2/162 ,  H01M2/1653 ,  H01M4/622 ,  H01M10/0525 ,  H01M2220/30 ,  H01M2300/0025 ,  Y02E60/122 ,  Y02P70/54 ,  Y10T29/49108

    Abstract: In a lithium ion battery, one or more chelating agents may be attached to a microporous polymer separator for placement between a negative electrode and a positive electrode or to a polymer binder material used to construct the negative electrode, the positive electrode, or both. The chelating agents may comprise, for example, at least one of a crown ether, a crown ether, a podand, a lariat ether, a calixarene, a calixcrown, or mixtures thereof. The chelating agents can help improve the useful life of the lithium ion battery by complexing with unwanted metal cations that may become present in the battery's electrolyte solution while, at the same time, not significantly interfering with the movement of lithium ions between the negative and positive electrodes.

    Abstract translation: 在锂离子电池中，可以将一种或多种螯合剂连接到微孔聚合物隔板上以放置在负极和正极之间，或者连接到用于构造负极，正极或两者的聚合物粘合剂材料。 螯合剂可以包括例如冠醚，冠醚，豆荚，木糖醚，杯芳烃，杯花岗岩或其混合物中的至少一种。 螯合剂可以通过与可能存在于电池电解质溶液中的不需要的金属阳离子络合而有助于提高锂离子电池的使用寿命，同时不会显着干扰负离子和正极之间的锂离子的运动 电极。

    Methods for fabricating silicon-based electrodes comprising naturally occurring carbonaceous filaments and battery cells utilizing the same
    7.
    发明授权
    Methods for fabricating silicon-based electrodes comprising naturally occurring carbonaceous filaments and battery cells utilizing the same 有权

    公开(公告)号：US11316142B2

    公开(公告)日：2022-04-26

    申请号：US16572789

    申请日：2019-09-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Meng Jiang ,  Raghunathan K ,  Ion C. Halalay ,  Mark W. Verbrugge

    IPC: H01M4/134 ,  H01M4/04 ,  H01M4/62 ,  H01M4/38

    Abstract: Methods for fabricating electrodes include coating a current collector with a slurry to form a coated current collector. The slurry includes a dry fraction, including silicon particles, polymeric binders, and one or more types of naturally occurring carbonaceous filaments, and one or more solvents. The coated current collector is heat treated to produce the electrode having a layer of silicon-based host material. The one or more naturally occurring carbonaceous filaments can include animal fibers, chitin, alginate, cellulose, keratin, and chitosan, and can have an average length of 1 μm to 50 μm and an average diameter of 1 nm to 500 nm. The dry fraction can include 5 wt. % to 95 wt. % silicon particles, 0.1 wt. % to 15 wt. % polymeric binders, and 1 wt. % to 20 wt. % naturally occurring carbonaceous filaments. The method can include assembling a battery cell by disposing the electrode and a positive electrode in electrolyte.

    ACID-SCAVENGING FUNCTIONAL SEPARATORS FOR POWER PERFORMANCE OF LITHIUM ION ELECTROCHEMICAL CELLS
    9.
    发明申请
    ACID-SCAVENGING FUNCTIONAL SEPARATORS FOR POWER PERFORMANCE OF LITHIUM ION ELECTROCHEMICAL CELLS 审中-公开

    公开(公告)号：US20180366781A1

    公开(公告)日：2018-12-20

    申请号：US15627376

    申请日：2017-06-19

    Applicant: GM Global Technology Operations LLC ,  Bar-Ilan University

    Inventor： Shalom Luski ,  Doron Aurbach ,  Timothy J. Fuller ,  Ion C. Halalay ,  Anjan Banerjee ,  Baruch Ziv ,  Raghunathan K

    IPC: H01M10/0565 ,  H01M2/16 ,  H01M10/0566

    Abstract: Methods of scavenging acid in a lithium-ion electrochemical cell are provided. An electrolyte solution that contains an acid or is capable of forming the acid is contacted with a polymer comprising a nitrogen-containing acid-trapping moiety selected from the group consisting of: an amine group, a pyridine group, and combinations thereof. The nitrogen-containing acid-trapping moiety scavenges acidic species present in the electrolyte solution by participating in a Lewis acid-base neutralization reaction. The electrolyte solution comprises a lithium salt and one or more solvents and is contained in the electrochemical cell that further comprises a first electrode, a second electrode having an opposite polarity from the first electrode, and a porous separator. Lithium ions can be cycled through the separator and electrolyte solution from the first electrode to the second electrode, where acid generated during the cycling is scavenged by the polymer comprising a nitrogen-containing acid-trapping moiety.

    Lithium ion battery
    10.
    发明授权
    Lithium ion battery 有权

    公开(公告)号：US10050313B2

    公开(公告)日：2018-08-14

    申请号：US15186526

    申请日：2016-06-19

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  Bar-Ilan University

    Inventor： Shalom Luski ,  Doron Aurbach ,  Bob R. Powell, Jr. ,  Ion C. Halalay ,  Timothy J. Fuller ,  Anjan Banerjee ,  Baruch Ziv ,  Yuliya Shilina

    IPC: H01M10/42 ,  H01M2/16 ,  H01M10/0525

    Abstract: A lithium ion battery includes a positive and a negative electrode, and a nanoporous or microporous polymer separator soaked in electrolyte solution and disposed between the electrodes. At least two different chelating agents are included and selected to complex with: i) two or more different transition metal ions; ii) a transition metal ion in two or more different oxidation states; or iii) both i) and ii). The at least two different selected chelating agents are to complex with transition metal ions in a manner sufficient to not affect movement of lithium ions across the separator during operation of the battery. The chelating agents are: dissolved or dispersed in the electrolyte solution; grafted onto the polymer of the separator; attached to the binder material of the negative and/or positive electrode; disposed within pores of the separator; coated on a surface of the separator; and/or coated on a surface of an electrode.

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