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    CONTROLLING INTERNAL BATTERY PRESSURE BUILDUP IN RECHARGABLE BATTERIES WITH A CRUSHABLE INSERT LAYER
    1.
    发明申请
    CONTROLLING INTERNAL BATTERY PRESSURE BUILDUP IN RECHARGABLE BATTERIES WITH A CRUSHABLE INSERT LAYER 有权

    公开(公告)号：US20250015412A1

    公开(公告)日：2025-01-09

    申请号：US18347091

    申请日：2023-07-05

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Meng Jiang ,  Yongjie Zhu ,  Louis G. Hector, JR. ,  Meinan He ,  Srikanth Arisetty ,  Mei Cai

    IPC: H01M50/242 ,  B60L50/64 ,  H01M10/0525 ,  H01M50/209 ,  H01M50/231 ,  H01M50/249

    Abstract: Excessive expansion of rechargeable batteries during recharging is a significant concern since the uncontrolled buildup of high internal battery pressures from expansion inside a confined space can lead to separator membrane failure and/or thermal runaway of a battery cell. A crushable foam or honeycomb insert layer is placed inside of a rigid battery fixture to automatically limit the progressive buildup of internal battery pressure due to charging-induced expansion of the battery cell during recharging. The crushable insert layer is included as part of the rigid battery fixture. Aluminum honeycomb cores and porous aluminum metal foam materials have a significant amount of crushability over a very wide range of compressive strains. Alternatively, a porous metal foam or metal honeycomb material may be infused with a liquid polymer (e.g., silicone, rubber, EDPM, or polyurethane) to enhance the mechanical properties of the polymer-infused metal foam or honeycomb metal/polymer composite material.

    Nickel-containing positive electrode slurries having reduced or eliminated gelation and high-energy-density positive electrodes for electrochemical cells
    4.
    发明授权
    Nickel-containing positive electrode slurries having reduced or eliminated gelation and high-energy-density positive electrodes for electrochemical cells 有权

    公开(公告)号：US11600814B2

    公开(公告)日：2023-03-07

    申请号：US17158737

    申请日：2021-01-26

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Meinan He ,  Biqiong Wang ,  Mei Cai

    IPC: H01M4/00 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/58

    Abstract: An electrode precursor or slurry according to various aspects of the present disclosure includes a blended electroactive material and a binder solution. The blended electroactive material includes a first electroactive material and a second electroactive material. The first electroactive material includes nickel. The first electroactive material is selected from the group consisting of LiNixCoyMnzO2 where x is greater than 0.6, LiNixCoyAlzO2 where x is greater than 0.6, LiNixCoyMnzAlαO2 where x is greater than 0.6, or any combination thereof. The second electroactive material includes a phosphor-olivine compound at less than or equal to about 30 weight percent of the blended electroactive material. The binder solution including a polymeric binder and a solvent including N-methyl-2-pyrrolidone. In various aspects, the present disclosure provides a high-nickel-content positive electrode formed from the slurry. In various aspects, the present disclosure provides an electrochemical cell including the positive electrode and a lithium metal negative electrode.

    Microporous and hierarchical porous carbon
    8.
    发明授权
    Microporous and hierarchical porous carbon 有权

    公开(公告)号：US11328878B2

    公开(公告)日：2022-05-10

    申请号：US16453112

    申请日：2019-06-26

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Fang Dai ,  Jingmei Shen ,  Mei Cai ,  Anne M. Dailly

    IPC: C01B31/08 ,  H01G11/62 ,  H01G11/24 ,  H01G11/34 ,  H01M4/62 ,  C01B32/342 ,  H01G11/86 ,  C01B32/30 ,  H01G11/60 ,  H01M10/052

    Abstract: A porous carbon material includes a hierarchical porous structure including a primary microporous structure and at least one of a secondary mesoporous structure and a secondary macroporous structure. The porous carbon material is formed by combining a halogenated-hydrocarbon, an aprotic hydrocarbon solvent, and a reductant to initiate a reaction that forms intermediate particles having a microporous framework; and subjecting the intermediate particles to a heat treatment at a heat treatment temperature ranging from about 300° C. to less than 1,500° C. for a heat treatment time period ranging from about 20 minutes to about 10 hours to thereby form the porous carbon material. The aprotic hydrocarbon solvent is selected from the group consisting of toluene, hexane, cyclohexane, and combinations thereof.

    Self-healing, UV-absorbing polymer coating
    9.
    发明授权
    Self-healing, UV-absorbing polymer coating 有权

    公开(公告)号：US11084947B2

    公开(公告)日：2021-08-10

    申请号：US15845402

    申请日：2017-12-18

    Applicant: GM Global Technology Operations LLC

    Inventor： Fang Dai ,  Mahmoud Abd Elhamid ,  Anne M. Dailly ,  Mei Cai

    IPC: C09D5/32 ,  C09D4/00 ,  B05D3/06 ,  C08J7/04

    Abstract: Systems and methods of providing a self-healing UV-protective polymer coating include a polymer matrix formed by initiating polymerization of a UV-absorbing-matrix precursor and a UV initiator and a self-healing portion disposed within the polymer matrix. The polymer matrix includes a plurality of active sites therein. The self-healing portion includes a self-healing precursor that is flowable and a self-healing initiator. The self-healing initiator is configured to polymerize the self-healing precursor using a cationic ring opening process.

    Methods for manufacturing sulfur electrodes
    10.
    发明授权
    Methods for manufacturing sulfur electrodes 有权

    公开(公告)号：US11031586B2

    公开(公告)日：2021-06-08

    申请号：US16221874

    申请日：2018-12-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Shuru Chen ,  Hongliang Wang ,  Fang Dai ,  Meinan He ,  Mei Cai

    IPC: H01M4/1393 ,  H01M4/1397 ,  H01M4/136 ,  H01M4/62 ,  H01M4/133 ,  H01M4/02

    Abstract: Methods for manufacturing sulfur electrodes include providing an electrode, wherein the electrode includes a current collector having a first surface, and a sulfur-based host material applied to the first surface of the current collector, wherein the sulfur-based host material comprises one or more sulfur compounds, one or more electrically conductive carbon materials, and one or more binders. The methods further include forming a plurality of channels within the sulfur-based host material using a laser or electron beam, wherein the plurality of channels define a plurality of host material columns, each column having one or more exterior surfaces contiguous which one or more of the channels which extend outward from the first surface of the current collector. Each of the one or more exterior surfaces can define a heat affected zone comprising a higher concentration of sulfur than the host material column prior to forming the plurality of channels.

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