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.