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    CALENDERED ELECTRODE AND METHOD OF MAKING SAME
    2.
    发明申请
    CALENDERED ELECTRODE AND METHOD OF MAKING SAME 有权

    公开(公告)号：US20220069273A1

    公开(公告)日：2022-03-03

    申请号：US17007102

    申请日：2020-08-31

    Applicant: GM Global Technology Operations LLC

    Inventor： Erik D. Huemiller ,  Nicholas P. Irish ,  Ryan C. Sekol ,  Dmitrity Bruder ,  Shaomao Xu ,  Jin Liu

    IPC: H01M4/04 ,  H01M4/66 ,  H01M10/058

    Abstract: A method of making a calendered electrode for a battery cell comprises introducing a coated electrode having a first surface extending thereover. The coated electrode has a predetermined density of active materials for ion transport. The method further comprises selectively modifying the coated electrode by patterning the first surface to define a patterned electrode having a first portion and a second portion. After the step of selectively modifying, the method further comprises compressing the patterned electrode by calendering the first surface to provide the first portion having a first density of active materials and the second portion having a second density of active materials. The second density is greater than the first density to define the calendered electrode having a spatial variation of active material density.

    Lithium alloy-based electrodes for electrochemical cells and methods for making the same
    3.
    发明授权
    Lithium alloy-based electrodes for electrochemical cells and methods for making the same 有权

    公开(公告)号：US11165052B2

    公开(公告)日：2021-11-02

    申请号：US16514633

    申请日：2019-07-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xingcheng Xiao ,  Jin Liu ,  Mei Cai ,  Meinan He ,  Hongliang Wang

    IPC: H01M4/1391 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/62 ,  H01M4/36 ,  H01M4/1395 ,  H01M4/04 ,  H01M4/134 ,  H01M4/02

    Abstract: A negative electrode according to various aspects of the present disclosure includes a negative electroactive material and a layer. The negative electroactive material includes a lithium-aluminum alloy. The layer is disposed directly on at least a portion of the negative electroactive material and coupled to the negative electroactive material. The layer includes anodic aluminum oxide and has a plurality of pores. The present disclosure also provides an electrochemical cell including the negative electrode. In certain aspects, the negative electroactive material is electrically conductive and functions as a negative electrode current collector such that the electrochemical cell is free of a distinct negative electrode current collector component. In certain aspects, the layer is ionically conductive and electrically insulating and functions as a separator such that the electrochemical cell is free of a distinct separator component. In various aspects, the present disclosure also provides a method of making the negative electrode.

    ELECTRODE COATING USING A POROUS CURRENT COLLECTOR
    7.
    发明申请
    ELECTRODE COATING USING A POROUS CURRENT COLLECTOR 有权

    公开(公告)号：US20230027323A1

    公开(公告)日：2023-01-26

    申请号：US17380530

    申请日：2021-07-20

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Shaomao Xu ,  Ryan Curtis Sekol ,  Jin Liu ,  Erik Damon Huemiller ,  Nicholas P. Irish ,  Dmitriy Bruder

    IPC: H01M4/74 ,  H01M4/80 ,  H01M4/04

    Abstract: Aspects of the disclosure include an electrode coating having a spatially varied porosity and a method of forming the same by using a porous current collector. An exemplary method can include forming a porous current collector having a bulk material and a plurality of voids. The porous current collector can be coated, infused, or otherwise saturated with an electrode coating having an active electrode material. The porous current collector and the electrode coating can be compressed in a calendering process to define the electrode film. The distribution of the plurality of voids in the porous current collector provides for regions of different calendering pressures during the calendering process. The regions of different calendering pressures leads to regions of higher and lower porosity in the resultant electrode film. In other words, an electrode film having a spatially varied porosity.

    Solvent-free dry powder process to incorporate ceramic particles into electrochemical cell components
    8.
    发明授权
    Solvent-free dry powder process to incorporate ceramic particles into electrochemical cell components 有权

    公开(公告)号：US11557758B2

    公开(公告)日：2023-01-17

    申请号：US16863655

    申请日：2020-04-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jin Liu ,  Xingcheng Xiao ,  Meinan He ,  Mei Cai

    IPC: H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

    Abstract: Solvent-free methods of making a component, like an electrode, for an electrochemical cell are provided. A particle mixture is processed in a dry-coating device having a rotatable vessel defining a cavity with a rotor. The rotatable vessel is rotated at a first speed in a first direction and the rotor at a second speed in a second opposite direction. The particle mixture includes first inorganic particles (e.g., electroactive particles), second inorganic particles (e.g., ceramic HF scavenging particles), and third particles (e.g., electrically conductive carbon-containing particles). The dry coating creates coated particles each having a surface coating (including second inorganic particles and third particles) disposed over a core region (the first inorganic particle). The coated particles are mixed with polymeric particles in a planetary and centrifugal mixer that rotates about a first axis and revolves about a second axis. The polymeric particles surround each of the plurality of coated particles.

    METHOD FOR FABRICATING AN ANODE FOR A LITHIUM BATTERY CELL
    9.
    发明申请
    METHOD FOR FABRICATING AN ANODE FOR A LITHIUM BATTERY CELL 有权

    公开(公告)号：US20220271268A1

    公开(公告)日：2022-08-25

    申请号：US17179543

    申请日：2021-02-19

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jin Liu ,  Jiazhi Hu ,  Raffaello Ardanese ,  Ryan C. Sekol ,  Lei Wang ,  Michael P. Balogh

    IPC: H01M4/04 ,  H01M10/0565 ,  H01M10/0569 ,  H01M10/0568

    Abstract: A method for fabricating an anode for a lithium ion battery cell is described and includes forming a solid electrolyte interface (SEI) layer on a raw anode prior to assembly into a battery cell by applying a first SEI-generating electrolyte to the raw anode to form a first intermediate anode, applying a second SEI-generating electrolyte to the first intermediate anode to form a second intermediate anode, and applying a third SEI-generating electrolyte to the second intermediate anode to form a cell anode, wherein the cell anode includes the raw anode having the SEI layer. Thus, a cell anode is formed by sequentially applying SEI-generating electrolytes to a raw anode to form the cell anode with an SEI layer, and a lithium ion battery cell is formed by assembling the cell anode into a cell pack, with a cathode, and a separator, and adding a cell electrolyte prior to sealing.

    MELT SPINNING METHODS FOR FORMING LITHIUM-METAL FOILS AND ELECTRODES OF ELECTROCHEMICAL DEVICES
    10.
    发明申请
    MELT SPINNING METHODS FOR FORMING LITHIUM-METAL FOILS AND ELECTRODES OF ELECTROCHEMICAL DEVICES 有权

    公开(公告)号：US20220267886A1

    公开(公告)日：2022-08-25

    申请号：US17179547

    申请日：2021-02-19

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Michael P. Balogh ,  Jin Liu ,  Ryan C. Sekol ,  Shaomao Xu ,  Erik D. Huemiller

    IPC: C23C6/00 ,  H01M10/0525 ,  H01M10/44 ,  H01M4/38 ,  H01M4/66 ,  H01M4/04

    Abstract: Presented are lithium-metal electrodes for electrochemical devices, systems and methods for manufacturing lithium-metal foils, and vehicle battery packs containing battery cells with lithium-metal anodes. A method of melt spinning lithium-metal foils includes melting lithium (Li) metal stock in an actively heated vessel to form molten Li metal. Using pressurized gas, the molten Li metal is ejected through a slotted nozzle at the base of the vessel. The ejected molten Li metal is directly impinged onto an actively cooled and spinning quench wheel or a carrier sheet that is fed across a support roller underneath the vessel. The molten Li metal is cooled and solidified on the spinning wheel/carrier sheet to form a Li-metal foil. The carrier sheet may be a polymeric carrier film or a copper current collector foil. An optional protective film may be applied onto an exposed surface of the Li-metal foil opposite the carrier sheet.

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