Storedot Ltd.

Carmit Ophir

Daniel Aronov

Doron Burshtain

Ronny Costi

Hani Farran

David Jacob

Sergey Remizov

Ohad Goldbart

Nitzan Shadmi

Boris Brudnik

Leora Shapiro

Libi Brakha

Cathodes for a fast charging lithium ion battery, processes for manufacturing thereof and corresponding batteries are provided. Cathode formulations comprise spinel and/or layered structure cathode material with 5-10% of cathode material having an olivine-based structure as polymerization initiator, binder material, and monomer and/or oligomer material selected to polymerize into a conductive polymer upon partial delithiation of the olivine-based structure cathode material during at least a first charging cycle of a cell having a cathode made of the cathode formulation. When the cathode is used in a battery, polymerization is induced in-situ (in-cell) during first charging cycle(s) of the battery to provide a polymer matrix which is evenly dispersed throughout the cathode.

LFP as initiator of in-battery polymerization of conducting polymers for high-rate-charging cathodes

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.

Methods of preparing anodes using tin as active material

Tin silicon anode active material

Active materials for anodes for lithium ion devices are disclosed. An active may comprise germanium nano-particles having a particle size of 20 to 100 nm, wherein the weight percentage of the germanium is between 72 to 96 weight % of the total weight of the active material; boron carbide nano-particles having a particle size of 20 to 100 nm, wherein the weight percentage of boron in the active material is between 3 to 6 weight % of the total weight of the active material; and tungsten carbide nano-particles having a particle size of 20 to 60 nm, wherein the weight percentage of tungsten in the active material is between 6 to 25 weight % of the total weight of the active material.

Germanium-containing active material for anodes for lithium-ion devices

Cathodes for a fast charging lithium ion battery, processes for manufacturing thereof and corresponding batteries are provided. Cathode formulations comprise cathode material having an olivine-based structure, binder material, and monomer material selected to polymerize into a conductive polymer upon partial delithiation of the cathode material during at least a first charging cycle of a cell having a cathode made of the cathode formulation. When the cathode is used in a battery, polymerization is induced in-situ (in-cell) during first charging cycle(s) of the battery to provide a polymer matrix which is evenly dispersed throughout the cathode.

In-battery polymerization of conducting polymers for high-rate charging cathodes

Lithium ion devices that include an anode, a cathode and an electrolyte are provided. The anode having an active material including germanium nano-particles, boron carbide nano-particles and tungsten carbide nano-particles, wherein the weight percentage of the germanium is between 5 to 80 weight % of the total weight of the anode material, the weight percentage of boron in the anode material is between 2 to 20 weight % of the total weight of the anode material and the weight percentage of tungsten in the anode material is between 5 to 20 weight % of the total weight of the anode materials.

Germanium-containing lithium-ion devices

Methods for making anodes for lithium ion devices are provided. The methods include milling germanium powder, carbon, and boron carbide powder to form a nano-particle mixture having a particle size of 20 to 100 nm; adding an emulsion of tungsten carbide nano-particles having a particle size of 20 to 60 nm to the mixture to form an active material; and adding a polymeric binder to the active material to form the anode, wherein the weight percentage of the germanium in the anode is between 5 to 80 weight % of the total weight of the anode, the weight percentage of boron in the anode is between 2 to 20 weight % of the total weight of the anode and the weight percentage of tungsten in the anode is between 5 to 20 weight % of the total weight of the anode.

Methods for making anodes for germanium-containing lithium-ion devices

An anode material for a lithium ion device includes an active material including germanium and boron. The weight percentage of the germanium is between about 45 to 80 weight % of the total weight of the anode material and the weight percentage of the boron is between about 2 to 20 weight % of the total weight of the anode material. The active material may include carbon at a weight percentage of between 0.5 to about 5 weight % of the total weight of the anode material. Additional materials, methods of making and devices are taught.

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Holon, Israel

Carmit Ophir