公开(公告)号：US20190148713A1

公开(公告)日：2019-05-16

申请号：US16243224

申请日：2019-01-09

Applicant: STOREDOT LTD.

Inventor： Doron BURSHTAIN ,  Sergey REMIZOV ,  David JACOB ,  Nitzan SHADMI ,  Hani FARRAN ,  Leora SHAPIRO ,  Ohad GOLDBART ,  Boris BRUDNIK ,  Carmit OPHIR ,  Daniel ARONOV

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

CPC classification number: H01M4/134 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/386 ,  H01M4/387 ,  H01M4/621 ,  H01M4/624 ,  H01M4/625 ,  H01M10/0525

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.

公开(公告)号：US20200343543A1

公开(公告)日：2020-10-29

申请号：US16394112

申请日：2019-04-25

Applicant: StoreDot Ltd.

Inventor： Ohad GOLDBART ,  Nitzan SHADMI ,  Hani FARRAN ,  Daniel ARONOV

IPC: H01M4/38 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/62 ,  H01M4/136 ,  H01M4/1397

Abstract: Methods, anode material particles, mixtures, anodes and lithium-ion batteries are provided, having passivated silicon-based particles that enable processing in oxidizing environments such as water-based slurries. Methods comprise forming a mixture of silicon particles with nanoparticles (NPs) and a carbon-based binders and/or surfactants, wherein the NPs comprise at least one of: metalloid oxide NPs, metalloid salt NPs and carbon NPs, reducing the mixture to yield a reduced mixture comprising coated silicon particles with a coating providing a passivation layer (possibly amorphous), and consolidating the reduced mixture to form an anode. It is suggested that the NPs provide nucleation sites for the passivation layer on the surface of the silicon particles—enabling significant anode-formation process simplifications such as using water-based slurries—enabled by disclosed methods and anode active material particles.

公开(公告)号：US20190252738A1

公开(公告)日：2019-08-15

申请号：US16390837

申请日：2019-04-22

Applicant: StoreDot Ltd.

Inventor： David JACOB ,  Sergey REMIZOV ,  Nitzan SHADMI ,  Hani FARRAN ,  Daniel ARONOV ,  Boris BRUDNIK

IPC: H01M10/42 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/38 ,  C09D179/02 ,  C09D5/24

CPC classification number: H01M10/4235 ,  C09D5/24 ,  C09D179/02 ,  H01M4/364 ,  H01M4/366 ,  H01M4/386 ,  H01M4/387 ,  H01M10/0525 ,  H01M2004/027

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.

公开(公告)号：US20180212240A1

公开(公告)日：2018-07-26

申请号：US15853885

申请日：2017-12-25

Applicant: StoreDot Ltd.

Inventor： David JACOB ,  Sergey REMIZOV ,  Nitzan SHADMI ,  Hani FARRAN ,  Daniel ARONOV

IPC: H01M4/36 ,  H01M4/60 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/38 ,  H01M4/485 ,  H01M4/02

Abstract: Core-shell particles, composite anode material, anodes made therefrom, lithium ion cells and methods are provided, which enable production of fast charging lithium ion batteries. The composite anode material has core-shell particles which are configured to receive and release lithium ions at their cores and to have shells that are configured to allow for core expansion upon lithiation. The cores of the core-shell particles are connected to the respective shells by conductive material such as carbon fibers, which may form a network throughout the anode material and possibly interconnect cores of many core-shell particles to enhance the electrical conductivity of the anode. Ionic conductive material and possibly mechanical elements may be incorporated in the core-shell particles to enhance ionic conductivity and mechanical robustness toward expansion and contraction of the cores during lithiation and de-lithiation.

公开(公告)号：US20170294680A1

公开(公告)日：2017-10-12

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

CPC classification number: H01M10/0567 ,  H01M4/366 ,  H01M4/587 ,  H01M4/628 ,  H01M10/0525 ,  H01M2300/0025

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.