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    Methods of briquetting precursor materials for prelithiated silicon active materials
    7.
    发明授权
    Methods of briquetting precursor materials for prelithiated silicon active materials 有权

    公开(公告)号：US11588145B2

    公开(公告)日：2023-02-21

    申请号：US16826041

    申请日：2020-03-20

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhongyi Liu ,  Xiaosong Huang ,  James R. Salvador

    IPC: H01M4/134 ,  B22F3/03 ,  B22F1/00 ,  H01M4/04 ,  B22F1/102 ,  H01M4/02

    Abstract: A method of making a lithiated silicon-based precursor material for a negative electrode material of an electrochemical cell that cycles lithium ions is provided. An admixture comprising a plurality of lithium particles and a plurality of silicon particles is briquetted by applying pressure of greater than or equal to about 10 MPa and applying heat at a temperature of less than or equal to about 180° C. to form a precursor briquette. The briquette has lithium particles and silicon particles distributed in a matrix and has a porosity level of less than or equal to about 60% of the total volume of the precursor briquette. The briquetting is conducted in an environment having less than or equal to about 0.002% by weight of any oxygen-bearing species or nitrogen (N2).

    METHOD OF FORMING AN ELECTRODE FOR A LITHIUM-ION ELECTROCHEMICAL CELL
    9.
    发明申请
    METHOD OF FORMING AN ELECTRODE FOR A LITHIUM-ION ELECTROCHEMICAL CELL 有权

    公开(公告)号：US20210151765A1

    公开(公告)日：2021-05-20

    申请号：US16686659

    申请日：2019-11-18

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Nicole Ellison ,  Xiaosong Huang

    IPC: H01M4/62 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/64

    Abstract: A method of forming an electrode for a lithium-ion electrochemical cell includes mixing together a conductive filler component, an active material component, and a binder solution that includes a binder component and a solvent to form a slurry; casting the slurry onto a current collector to form a wet workpiece; and submersing the wet workpiece in a bath that includes a non-solvent to induce a phase inversion and form a wet electrode composition. Submersing and inducing the phase inversion includes forming a liquid-like polymer lean phase and a solid-like polymer rich phase in the wet electrode composition as the non-solvent enters the slurry. The method includes drying the wet electrode composition to form an electrode composition disposed on the current collector and thereby form the electrode.

    ELECTRODE AND ELECTRODE COMPOSITION FOR A LITHIUM-ION ELECTROCHEMICAL CELL
    10.
    发明申请
    ELECTRODE AND ELECTRODE COMPOSITION FOR A LITHIUM-ION ELECTROCHEMICAL CELL 有权

    公开(公告)号：US20210151764A1

    公开(公告)日：2021-05-20

    申请号：US16686398

    申请日：2019-11-18

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Nicole Ellison ,  Xiaosong Huang

    IPC: H01M4/62 ,  H01M4/64 ,  H01M4/38 ,  H01M10/0525

    Abstract: An electrode for a lithium-ion electrochemical cell includes a current collector and an electrode composition disposed on the current collector. The electrode composition includes a binder component, a conductive filler component disposed within the binder component, and an active material component dispersed within the binder component and the conductive filler component. The electrode composition has a first surface and a second surface spaced apart from and parallel to the first surface. The electrode composition defines: a plurality of channels each extending between the first surface and the second surface in a first direction that is generally perpendicular to the first surface and each configured for lithium-ion transport between the first surface and the second surface; and a plurality of pores between the first surface and the second surface and adjacent to the plurality of channels.

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