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    Mobile layer of ionic liquid in electrolytes
    11.
    发明授权
    Mobile layer of ionic liquid in electrolytes 有权

    公开(公告)号：US10910671B2

    公开(公告)日：2021-02-02

    申请号：US16565500

    申请日：2019-09-10

    Applicant: StoreDot Ltd.

    Inventor： Doron Burshtain ,  Nir Kedem ,  Daniel Aronov

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/36 ,  H01M4/58 ,  H01M4/587 ,  H01M4/60

    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.

    AEROGEL-BASED ELECTRODES
    12.
    发明申请
    AEROGEL-BASED ELECTRODES 审中-公开

    公开(公告)号：US20200235387A1

    公开(公告)日：2020-07-23

    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 ,  H01M10/0565 ,  H01M4/134 ,  H01M4/29

    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.

    Production of metalloid-based anodes for lithium ion batteries using dry etching
    14.
    发明授权
    Production of metalloid-based anodes for lithium ion batteries using dry etching 有权

    公开(公告)号：US10581065B1

    公开(公告)日：2020-03-03

    申请号：US16258730

    申请日：2019-01-28

    Applicant: StoreDot Ltd.

    Inventor： Eran Sella ,  Daniel Aronov

    IPC: H01M4/1395 ,  H01M4/134 ,  H01M10/0525 ,  H01M4/62

    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.

    Aluminum anode active material
    17.
    发明授权
    Aluminum anode active material 有权

    公开(公告)号：US10367192B2

    公开(公告)日：2019-07-30

    申请号：US15480911

    申请日：2017-04-06

    Applicant: STOREDOT LTD.

    Inventor： Doron Burshtain ,  Nir Kedem ,  Daniel Aronov

    IPC: H01M4/134 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/36 ,  H01M4/1395 ,  H01M4/04 ,  H01M4/62 ,  H01M4/02

    Abstract: Improved anodes and cells are provided, which enable fast charging rates with enhanced safety due to much reduced probability of metallization of lithium on the anode, preventing dendrite growth and related risks of fire or explosion. Anodes and/or electrolytes have buffering zones for partly reducing and gradually introducing lithium ions into the anode for lithiation, to prevent lithium ion accumulation at the anode electrolyte interface and consequent metallization and dendrite growth. Various anode active materials and combinations, modifications through nanoparticles and a range of coatings which implement the improved anodes are provided.

    SEMI-SOLID ELECTROLYTES WITH FLEXIBLE PARTICLE COATINGS
    18.
    发明申请
    SEMI-SOLID ELECTROLYTES WITH FLEXIBLE PARTICLE COATINGS 审中-公开

    公开(公告)号：US20190207270A1

    公开(公告)日：2019-07-04

    申请号：US16268527

    申请日：2019-02-06

    Applicant: StoreDot Ltd.

    Inventor： Doron BURSHTAIN ,  Daniel ARONOV ,  Eran SELLA

    IPC: H01M10/42 ,  H01M10/0525 ,  H01M10/0567

    CPC classification number: H01M10/4235 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2300/0091 ,  H01M2300/0094

    Abstract: Electrolytes, anode material particles and methods are provided for improving performance and enhancing the safety of lithium ion batteries. Electrolytes may comprise ionic liquid(s) as additives which protect the anode material particles and possibly bind thereto; and/or may comprise a large portion of fluoroethylene carbonate (FEC) and/or vinylene carbonate (VC) as the cyclic carbonate component, and possibly ethyl acetate (EA) and/or ethyl methyl carbonate (EMC) as the linear component; and/or may comprise composite electrolytes having solid electrolyte particles coated by flexible ionic conductive material. Ionic liquid may be used to pre-lithiate in situ the anode material particles. Disclosed electrolytes improve lithium ion conductivity, prevent electrolyte decomposition and/or prevents lithium metallization on the surface of the anode.

    Electrolytes for lithium ion batteries
    20.
    发明授权
    Electrolytes for lithium ion batteries 有权

    公开(公告)号：US10199677B2

    公开(公告)日：2019-02-05

    申请号：US15844689

    申请日：2017-12-18

    Applicant: StoreDot Ltd.

    Inventor： Zohar Drach ,  Olga Guchok ,  Leonid Krasovitsky ,  Ekaterina Gotlib Vainshtein ,  Liron Amir

    IPC: H01M10/052 ,  H01M10/0569

    Abstract: Electrolytes, lithium ion cells and corresponding methods are provided, for extending the cycle life of fast charging lithium ion batteries. The electrolytes are based on fluoroethylene carbonate (FEC) and/or vinylene carbonate (VC) as the cyclic carbonate component, and possibly on ethyl acetate (EA) and/or ethyl methyl carbonate (EMC) as the linear component. Proposed electrolytes extend the cycle life by factors of two or more, as indicated by several complementary measurements.

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