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    Partly immobilized ionic liquid electrolyte additives for lithium ion batteries
    3.
    发明授权
    Partly immobilized ionic liquid electrolyte additives for lithium ion batteries 有权

    公开(公告)号：US11594757B2

    公开(公告)日：2023-02-28

    申请号：US15447784

    申请日：2017-03-02

    Applicant: StoreDot Ltd.

    Inventor： Doron Burshtain ,  Eran Sella ,  Niles Fleischer ,  Hani Farran ,  Leora Shapiro

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/36 ,  H01M4/62

    Abstract: Electrolytes, anodes, lithium ion cells and methods are provided for preventing lithium metallization in lithium ion batteries to enhance their safety. Electrolytes comprise up to 20% ionic liquid additives which form a mobile solid electrolyte interface during charging of the cell and prevent lithium metallization and electrolyte decomposition on the anode while maintaining the lithium ion mobility at a level which enables fast charging of the batteries. Anodes are typically metalloid-based, for example include silicon, germanium, tin and/or aluminum. A surface layer on the anode bonds, at least some of the ionic liquid additive to form an immobilized layer that provides further protection at the interface between the anode and the electrolyte, prevents metallization of lithium on the former and decomposition of the latter.

    ANODE COATING IN LITHIUM ION BATTERIES
    4.
    发明申请
    ANODE COATING IN LITHIUM ION BATTERIES 有权

    公开(公告)号：US20210013494A1

    公开(公告)日：2021-01-14

    申请号：US16946787

    申请日：2020-07-06

    Applicant: STOREDOT LTD.

    Inventor： Eran Sella ,  Nitzam Shadmi ,  Ohad Goldfarb ,  Daniel Aronov

    IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/587 ,  H01M10/0565 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/133

    Abstract: Anodes for lithium-ion batteries and methods for their production are provided. Anodes comprise an initial anode made of consolidated anode material particles, and a coating of the initial anode, that comprises a layer of an ionic-conductive polymer which provides an artificial SEI (solid-electrolyte interphase) to facilitate lithium ion transfer through the coating while preventing direct fluid communication with the anode material particles and electrolyte contact thereto. The coating may be configured to keep the anode resistance low while preventing electrolyte decomposition thereupon, enhancing cell stability and cycling lifetime.

    ELECTROLYTE ADDITIVES IN LITHIUM-ION BATTERIES
    5.
    发明申请
    ELECTROLYTE ADDITIVES IN LITHIUM-ION BATTERIES 审中-公开

    公开(公告)号：US20190356013A1

    公开(公告)日：2019-11-21

    申请号：US16525627

    申请日：2019-07-30

    Applicant: StoreDot Ltd.

    Inventor： Eran Sella ,  Shirel Cohen ,  Ido Herzog ,  Rony Schwarz

    IPC: H01M10/052 ,  H01M10/0569

    Abstract: Lithium ion batteries and electrolytes therefor are provided, which include electrolyte additives having dithioester functional group(s) that stabilize the SEI (solid-electrolyte interface) at the surfaces of the anode material particles, and/or stabilize the CEI (cathode electrolyte interface) at the surfaces of the cathode material particles, and/or act as oxygen scavengers to prevent cell degradation. The electrolyte additives having dithioester functional group(s) may function as polymerization controlling and/or chain transfer agents that regulate the level of polymerization of other electrolyte components, such as VC (vinyl carbonate) and improve the formation and operation of the batteries. The lithium ion batteries may have metalloid-based anodes—including mostly Si, Ge and/or Sn as anode active material particles.

    Aerogel-based electrodes
    8.
    发明授权
    Aerogel-based electrodes 有权

    公开(公告)号：US11569499B2

    公开(公告)日：2023-01-31

    申请号：US16697220

    申请日：2019-11-27

    Applicant: StoreDot Ltd.

    Inventor： Eran Sella ,  Ohad Goldbart ,  Daniel Aronov

    IPC: H01M4/38 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/29 ,  H01M10/0565 ,  H01M4/02

    Abstract: Electrodes, production methods and mono-cell batteries are provided, which comprise active material particles embedded in electrically conductive metallic porous structure, dry-etched anode structures and battery structures with thick anodes and cathodes that have spatially uniform resistance. The metallic porous structure provides electric conductivity, a large volume that supports good ionic conductivity, that in turn reduces directional elongation of the particles during operation, and may enable reduction or removal of binders, conductive additives and/or current collectors to yield electrodes with higher structural stability, lower resistance, possibly higher energy density and longer cycling lifetime. Dry etching treatments may be used to reduce oxidized surfaces of the active material particles, thereby simplifying production methods and enhancing porosity and ionic conductivity of the electrodes. Electrodes may be made thick and used to form mono-cell batteries which are simple to produce and yield high performance.

    Passivated and/or protected silicon anode material slurries
    9.
    发明授权
    Passivated and/or protected silicon anode material slurries 有权

    公开(公告)号：US11196039B2

    公开(公告)日：2021-12-07

    申请号：US16732587

    申请日：2020-01-02

    Applicant: Storedot Ltd.

    Inventor： Eran Sella ,  Eynat Matzner ,  Maxim Kagan ,  Yaron Ideses ,  Moria Koren

    IPC: H01B1/24 ,  H01M4/00 ,  H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M4/02

    Abstract: Methods of preparing Si-based anode slurries and anode made thereof are provided. Methods comprise coating silicon particles within a size range of 300-700 nm by silver and/or tin particles within a size range of 20-500 nm, mixing the coated silicon particles with conductive additives and binders in a solvent to form anode slurry, and preparing an anode from the anode slurry. Alternatively or complementarily, silicon particles may be milled in an organic solvent, and, in the same organic solvent, coating agent(s), conductive additive(s) and binder(s) may be added to the milled silicon particles—to form the Si-based anode slurry. Alternatively or complementarily, milled silicon particles may be mixed, in a first organic solvent, with coating agent(s), conductive additive(s) and binder(s)—to form the Si-based anode slurry. Disclosed methods simplify the anode production process and provide equivalent or superior anodes.

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