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    Nickel-containing positive electrode slurries having reduced or eliminated gelation and high-energy-density positive electrodes for electrochemical cells
    22.
    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.

    ELECTROCHEMICAL CELLS WITH COPPER-FREE ELECTRODES AND METHODS FOR MANUFACTURING THE SAME
    23.
    发明申请
    ELECTROCHEMICAL CELLS WITH COPPER-FREE ELECTRODES AND METHODS FOR MANUFACTURING THE SAME 有权

    公开(公告)号：US20220131126A1

    公开(公告)日：2022-04-28

    申请号：US17082618

    申请日：2020-10-28

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xingcheng Xiao ,  Hongliang Wang ,  Meinan He

    IPC: H01M4/04 ,  H01M4/46

    Abstract: Presented are electrochemical devices with copper-free electrodes, methods for making/using such devices, and lithium alloy-based electrode tabs and current collectors for rechargeable lithium-class battery cells. A method of manufacturing copper-free electrodes includes feeding an aluminum workpiece, such as a strip of aluminum sheet metal, into a masking device. The masking device then applies a series of dielectric masks, such as strips of epoxy resin or dielectric tape, onto discrete areas of the workpiece to form a masked aluminum workpiece with masked areas interleaved with unmasked areas. The masked workpiece is then fed into an electrolytic anodizing solution, such as sulfuric acid, to form an anodized aluminum workpiece with anodized surface sections on the unmasked areas interleaved with un-anodized surface sections underneath the dielectric masks of the masked areas. The dielectric masks are removed to reveal the un-anodized surface sections, and the anodized aluminum workpiece is segmented into multiple copper-free electrodes.

    Methods for manufacturing sulfur electrodes
    24.
    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.

    Method of manufacturing an electrochemical cell
    25.
    发明授权
    Method of manufacturing an electrochemical cell 有权

    公开(公告)号：US10797301B2

    公开(公告)日：2020-10-06

    申请号：US16131853

    申请日：2018-09-14

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

    IPC: H01M4/1395 ,  H01M4/58 ,  H01M4/48 ,  H01M10/052 ,  H01M4/04 ,  H01M10/0585 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/66 ,  H01M4/02

    Abstract: In a method of manufacturing an electrochemical cell, a porous or non-porous electrically conductive metal substrate may be provided. A conformal metal chalcogenide layer may be formed on a surface of the metal substrate. The metal substrate with the conformal metal chalcogenide layer may be immersed in a nonaqueous liquid electrolyte solution comprising a lithium salt dissolved in a polar aprotic organic solvent. An electrical potential may be established between the metal substrate and a counter electrode immersed in the nonaqueous liquid electrolyte solution such that lithium ions in the electrolyte solution are reduced to metallic lithium and deposited on the surface of the metal substrate over the metal chalcogenide layer to form a conformal lithium metal layer on the surface of the metal substrate over the metal chalcogenide layer.

    Electrochemical cells with copper-free electrodes and methods for manufacturing the same
    30.
    发明授权
    Electrochemical cells with copper-free electrodes and methods for manufacturing the same 有权

    公开(公告)号：US11462723B2

    公开(公告)日：2022-10-04

    申请号：US17082618

    申请日：2020-10-28

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xingcheng Xiao ,  Hongliang Wang ,  Meinan He

    IPC: H01M4/04 ,  H01M4/46 ,  B05D1/02 ,  B05D1/32

    Abstract: Presented are electrochemical devices with copper-free electrodes, methods for making/using such devices, and lithium alloy-based electrode tabs and current collectors for rechargeable lithium-class battery cells. A method of manufacturing copper-free electrodes includes feeding an aluminum workpiece, such as a strip of aluminum sheet metal, into a masking device. The masking device then applies a series of dielectric masks, such as strips of epoxy resin or dielectric tape, onto discrete areas of the workpiece to form a masked aluminum workpiece with masked areas interleaved with unmasked areas. The masked workpiece is then fed into an electrolytic anodizing solution, such as sulfuric acid, to form an anodized aluminum workpiece with anodized surface sections on the unmasked areas interleaved with un-anodized surface sections underneath the dielectric masks of the masked areas. The dielectric masks are removed to reveal the un-anodized surface sections, and the anodized aluminum workpiece is segmented into multiple copper-free electrodes.

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