Abstract: Systems and methods for thermal curing of water soluble polymers for silicon dominant anodes to improve the mechanical properties of the anode and electrochemical performance of a battery are provided.

Abstract: An energy storage device comprising a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode comprises a self-supporting composite material film, a separator between the first electrode and the second electrode, and an electrolyte in contact with the first electrode, the second electrode, and the separator, wherein the electrolyte comprises at least one of a fluorine-containing cyclic carbonate, a fluorine-containing linear carbonate, and a fluoroether. The composite material film having greater than 0% and less than about 90% by weight of silicon particles, and greater than 0% and less than about 90% by weight of one or more types of carbon phases. At least one of the one or more types of carbon phases can be a substantially continuous phase that holds the composite material film together such that the silicon particles are distributed throughout the composite material film.

Abstract: Electrolytes and electrolyte additives for energy storage devices comprising metal sulfide compounds are disclosed. The energy storage device comprises a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, an electrolyte, and at least one electrolyte additive selected from a metal sulfide compound.

Abstract: Electrolytes and electrolyte additives for energy storage devices comprising alkoxyethane based compounds are disclosed. The energy storage device comprises a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, an electrolyte comprising at least two electrolyte co-solvents, wherein at least one electrolyte co-solvent comprises an alkoxyethane based compound.

Abstract: The present application describes the use of a solid electrolyte interphase (SEI) fluorinating precursor and/or an SEI fluorinating compound to coat an electrode material and create an artificial SEI layer. These modifications may increase surface passivation of the electrodes, SEI robustness, and structural stability of the silicon-containing electrodes.

Abstract: In certain embodiments, an electrode includes a body of material formed in substantial part of carbon, the body having an exterior surface and an interior located within the exterior surface, and a plurality cavities located in the interior of the body. Each of the cavities is in communication with the exterior of the body and has an interior surface. The cavities can each be sized to accommodate a battery separator located therein and substantially covering the interior surface of the cavity.

Abstract: Silicon particles for use in an electrode in an electrochemical cell are provided. The silicon particles may have outer regions extending about 20 nm deep from the surfaces, the outer regions comprising an amount of aluminum such that a bulk measurement of the aluminum comprises at least about 0.01% by weight of the silicon particles. The bulk measurement of the aluminum may provide the amount of aluminum present at least in the outer regions.

Abstract: Single Li-ion conducting solid-state polymer electrolytes for use in energy storage devices are disclosed. The energy storage device comprises a first electrode and a second electrode, where at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, and an electrolyte. Electrolytes may include all-solid-state polymer electrolytes, quasi-solid polymer electrolytes and/or polymer gel electrolytes. The single Li-ion conducting solid-state polymer electrolytes can improve the electrochemical performances and safety of Si anode-based Li-ion batteries.

Abstract: Methods of recycling silicon from lithium-ion batteries having silicon-based electrodes are disclosed. Batteries and methods of manufacturing batteries from the recycled silicon are also disclosed. A method of recycling may include discharging each of one or more batteries to below a threshold voltage and disassembling each of the one or more batteries to collect source material from silicon-based electrodes of the one or more batteries. The source material may include silicon from the silicon-based electrodes. The method may further include rinsing the source material in alcohol to obtain a solution and extracting recycled silicon from the solution by heating the silicon for a first period of time and leaching the silicon in an acid for a second period of time. In some methods, the heating occurs before the leaching. In other embodiments, the leaching occurs before the heating.

Abstract: Systems and methods are provided for state-of-health models for lithium-silicon batteries. State-of-health (SOH) of a lithium-ion cell may be assessed, with the assessing including calculating the state-of-health (SOH) using an enhanced state-of-health (SOH) model, with the enhanced state-of-health (SOH) model using input data other than data provided directly by the lithium-ion cell. The input data includes at least data acquired during operation of the lithium-ion cell and/or data acquired during manufacturing and initialization of the lithium-ion cell or electrodes of the lithium-ion cell. The lithium-ion cell may be a silicon-dominant cell including a silicon-dominant anode with silicon >50% of active material of the anode, and the enhanced state-of-health (SOH) model may be configured based on one or more characteristics unique to silicon-dominant cells.

Abstract: Electrolytes and electrolyte additives for energy storage devices including an anhydride compound are provided. The energy storage device includes a first electrode and a second electrode, where at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, an electrolyte, and at least one electrolyte additive which is an anhydride compound.

Abstract: Silicon particles for active materials and electro-chemical cells are provided. The active materials comprising silicon particles described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0% and less than about 90% by weight silicon particles, the silicon particles having an average particle size between about 10 nm and about 40 ?m, wherein the silicon particles have surface coatings comprising silicon carbide or a mixture of carbon and silicon carbide, and greater than 0% and less than about 90% by weight of one or more types of carbon phases, wherein at least one of the one or more types of carbon phases is a substantially continuous phase.

Abstract: Systems and methods are provided for state-of-health balanced battery management system. State-of-health (SOH) of one or more lithium-ion cells may be assessed, and based on the assessing of state-of-health (SOH), the one or more lithium-ion cells may be controlled. The controlling may include setting or modifying one or more operating parameters of at least one lithium-ion cell, and the controlling may be configured to equilibrate the state-of-health (SOH) of the one or more lithium-ion cells or to modify a state-of-health (SOH) of at least one lithium-ion cell so that the one or more lithium-ion cells have a uniform state-of-health (SOH).

Abstract: Electrolytes and electrolyte additives for energy storage devices comprising silyl amine compounds or derivatives thereof are disclosed. The energy storage device comprises a first electrode and a second electrode, where one or both of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, an electrolyte, and at least one electrolyte additive selected from silyl amine compounds or derivatives thereof.

Abstract: Electrodes and methods of forming electrodes are described herein. The electrode can be an electrode of an electrochemical cell or battery. The electrode includes a current collector and a film in electrical communication with the current collector. The film may include a carbon phase that holds the film together. The electrode further includes an electrode attachment substance that adheres the film to the current collector.

Abstract: Systems and methods are provided for Si-based anodes with cross-linked carbon nanotubes. A slurry for use in anodes may be mixed, with the slurry including an anode active material and a carbon-based additive, where the slurry may be used in forming an anode. The anode active material may yield a silicon-dominant anode when the slurry is used in forming the anode, and the carbon-based additive forms a mesh-like structure in the silicon-dominant anode. The carbon-based additive includes cross-linked carbon nanotubes (CNT).

Abstract: Methods of preparing an electrochemically active material can include providing electrochemically active particles, coating the particles with a binder, and exposing the particles to a source of metal. The methods can also include forming metal salt on the surface of the particles from the source of metal and heating the metal salt to form metal oxide coated particles.

Abstract: Silicon particles for use in an electrode in an electrochemical cell are provided. The silicon particles may have outer regions extending about 20 nm deep from the surfaces, the outer regions comprising an amount of aluminum such that a bulk measurement of the aluminum comprises at least about 0.01% by weight of the silicon particles. The bulk measurement of the aluminum may provide the amount of aluminum present at least in the outer regions.

Abstract: In certain embodiments, an electrode includes a body of material formed in substantial part of carbon, the body having an exterior surface and an interior located within the exterior surface, and a plurality cavities located in the interior of the body. Each of the cavities is in communication with the exterior of the body and has an interior surface. The cavities can each be sized to accommodate a battery separator located therein and substantially covering the interior surface of the cavity.

Abstract: Systems and methods utilizing water soluble (aqueous) PAA-based polymer binders for silicon-dominant anodes may include an electrode coating layer on a current collector, where the electrode coating layer is formed from silicon and a pyrolyzed water soluble PAA-based polymer blend, wherein the water soluble PAA-based polymer blend comprises PAA and one or more additional water-soluble polymer components. The electrode coating layer may include more than 70% silicon and the anode may be in a lithium ion battery.