公开(公告)号：US20240313357A1

公开(公告)日：2024-09-19

申请号：US18603980

申请日：2024-03-13

申请人： StoreDot, Ltd.

发明人： Daniel Aronov ,  Nir Kedem ,  Yaron Idesis ,  Dan Corfas ,  Assaf Zehavi ,  Zvi Ioffe

IPC分类号： H01M50/491 ,  H01M4/02 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M50/451

CPC分类号： H01M50/491 ,  H01M50/451 ,  H01M2004/027 ,  H01M4/362 ,  H01M4/386 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2300/0025

摘要： Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode having a conductive current collector coated with a composite containing at least 30% Si by weight, a cathode configured as a source of Li ions, an electrolyte capable of carrying Li-ions between the anode and the cathode, and a separator between the anode and the cathode, the separator having a porosity of at least 38%. Methods of charging such rechargeable battery cells are also disclosed.

公开(公告)号：US20240313273A1

公开(公告)日：2024-09-19

申请号：US18604044

申请日：2024-03-13

申请人： StoreDot, Ltd.

发明人： Daniel Aronov ,  Nir Kedem ,  Yaron Idesis ,  Dan Corfas ,  Assaf Zehavi ,  Zvi Ioffe

IPC分类号： H01M10/44 ,  H01M4/02 ,  H01M4/131 ,  H01M4/525 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/42 ,  H01M50/417 ,  H01M50/491

CPC分类号： H01M10/44 ,  H01M4/131 ,  H01M4/525 ,  H01M4/663 ,  H01M4/667 ,  H01M10/0525 ,  H01M10/0569 ,  H01M50/417 ,  H01M50/491 ,  H01M2004/028 ,  H01M2010/4292 ,  H01M2300/0037

摘要： Rechargeable battery cells and methods for extreme fast charging are disclosed. For example, such a rechargeable battery cell might be chargeable to at least 70% of usable capacity within 15 minutes. Such a rechargeable battery cell may include an anode having at least one surface with a reversible areal capacity, after formation, up to 8.0 mAh/cm2, and a cathode having at least one surface with a reversible areal capacity, after formation, up to 6 mAh/cm2, wherein a ratio of areal capacity of the at least one surface of the anode to the at least one surface of the cathode is between 1.15 to 1.45. Methods of charging rechargeable battery cells disclosed herein under conditions sufficient to enable charging of at least 70% of usable capacity to the rechargeable battery cell within 15 minutes, are also disclosed.

公开(公告)号：US11569499B2

公开(公告)日：2023-01-31

申请号：US16697220

申请日：2019-11-27

申请人： StoreDot Ltd.

发明人： Eran Sella ,  Ohad Goldbart ,  Daniel Aronov

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

摘要： 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.

公开(公告)号：US20220285671A1

公开(公告)日：2022-09-08

申请号：US17652949

申请日：2022-03-01

申请人： STOREDOT LTD.

发明人： Shirel COHEN

IPC分类号： H01M4/36 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/485

摘要： A manufacturing method related to a slurry, the method may include preparing a slurry that comprises anode active material, one or more binders and one or more additives, wherein the anode active material are partially coated anode active material that are partially coated with lithium sulfate

公开(公告)号：US20210399393A1

公开(公告)日：2021-12-23

申请号：US17304647

申请日：2021-06-23

申请人： STOREDOT LTD.

发明人： Assaf Zehavi ,  Nir Dolev ,  Tzemah Kislev ,  Daniel Aronov

IPC分类号： H01M50/548 ,  H01M10/04

摘要： An electrochemical cell that may include a cathode sheet; a cathode tab that extends from the cathode sheet; an anode sheet; an anode tab that extends from the anode sheet, the second direction differs from the first direction; one or more separator sheets; and a first electrical connecting unit. The cathode sheet, the anode sheet and the one or more separator sheets are wound around a common axis to form multiple windings; wherein the one or more separator sheets separate between the anode sheet and the cathode sheet. The first electrical connecting unit mechanically and electrically contacts a first portion of a first electrode tab, the first portion belongs to a first winding of the multiple windings; wherein the first electrode tab is one of the anode tab and the cathode tab.

公开(公告)号：US11196039B2

公开(公告)日：2021-12-07

申请号：US16732587

申请日：2020-01-02

申请人： Storedot Ltd.

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

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

摘要： 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.

公开(公告)号：US20210234197A1

公开(公告)日：2021-07-29

申请号：US16774004

申请日：2020-01-28

申请人： StoreDot Ltd.

发明人： Ido HERZOG ,  Sanaa MUSA ,  Shirel COHEN ,  Rony SCHWARZ ,  Eran SELLA

IPC分类号： H01M10/0567 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  H01M4/485 ,  H01M10/0569

摘要： 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.

公开(公告)号：US20210210754A1

公开(公告)日：2021-07-08

申请号：US16732506

申请日：2020-01-02

申请人： Storedot Ltd.

发明人： Eran SELLA ,  Eynat MATZNER ,  Tal CHEN ,  Michael KULBAK

IPC分类号： H01M4/38 ,  C09C3/06 ,  H01M4/54 ,  H01M10/0525 ,  H01M4/62

摘要： 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.

公开(公告)号：US20210210741A1

公开(公告)日：2021-07-08

申请号：US16735737

申请日：2020-01-07

申请人： Storedot Ltd.

发明人： Ivgeni SHTERENBERG ,  Eran SELLA ,  Eynat MATZNER ,  Shirel COHEN ,  Hadar MAZOR SHAFIR ,  Daniel ARONOV

IPC分类号： H01M4/04 ,  H01M4/1395 ,  H01M4/38 ,  H01M10/0525 ,  H01M10/02

摘要： Prelithiation methods and fast charging lithium ion cell are provided, which combine high energy density and high power density. Several structural and chemical modifications are disclosed to enable combination of features that achieve both goals simultaneously in fast charging cells having long cycling lifetime. The cells have anodes with high content of Si, Ge and/or Sn as principal anode material, and cathodes providing a relatively low C/A ratio, with the anodes being prelithiated to have a high lithium content, provided by a prelithiation algorithm. Disclosed algorithms determine lithium content achieved through prelithiation by optimizing the electrolyte to increase cycling lifetime, adjusting energy density with respect to other cell parameters, and possibly reducing the C/A ratio to maintain the required cycling lifetime.

公开(公告)号：US10910671B2

公开(公告)日：2021-02-02

申请号：US16565500

申请日：2019-09-10

申请人： StoreDot Ltd.

发明人： Doron Burshtain ,  Nir Kedem ,  Daniel Aronov

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

摘要： 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.