Abstract: Systems and methods are provided for carbon additives for direct coating of silicon-dominant anodes. An example composition for use in directly coated anodes may include a silicon-dominated anode active material, a carbon-based binder, and a carbon-based additive, with the composition being configured for low-temperature pyrolysis. The low-temperature pyrolysis may be conducted at <850° C. An anode may be formed using a direct coating process of the composition on a current collector. The anode active material may yield silicon constituting between 90% and 95% of weight of the formed anode after pyrolysis. The carbon-based additive may yield carbon constituting between 2% and 6% of weight of the formed anode after pyrolysis. The carbon-based additive may include carbon particles with surface area >65 m2/g.

Abstract: Systems and methods are provided for carbon additives for direct coating of silicon-dominant anodes. An example composition for use in directly coated anodes may include a silicon-dominated anode active material, a carbon-based binder, and a carbon-based additive, with the composition being configured for low-temperature pyrolysis. The low-temperature pyrolysis may be conducted at <600° C. An anode may be formed using a direct coating process of the composition on a current collector. The anode active material yields silicon constituting between 86% and 97% of weight of the formed anode after pyrolysis. The carbon-based additive yields carbon constituting between 2% and 6% of weight of the formed anode after pyrolysis.

Abstract: Systems and methods for anisotropic expansion of silicon-dominant anodes may include a cathode, an electrolyte, and an anode, where the anode may include a current collector and an active material on the current collector. An expansion of the anode during operation may be configured by a thickness of the current collector. The expansion of the anode may be more anisotropic for thicker current collectors. A thicker current collector may be 10 ?m thick or greater. The expansion of the anode may be more anisotropic for more rigid materials used for the current collector. A more rigid current collector may include nickel and a less rigid current collector may include copper. The expansion of the anode may be more anisotropic for a rougher surface current collector.

Abstract: Systems and methods for anisotropic expansion of silicon-dominant anodes may include a cathode, an electrolyte, and an anode, where the anode may include a current collector and an active material on the current collector. An expansion of the anode during operation may be configured by a roughness and/or thickness of the current collector, a metal used for the current collector, and/or a lamination process that adheres the active material to the current collector. The expansion of the anode may be more anisotropic for thicker current collectors. A thicker current collector may be 10 ?m thick or greater. The expansion of the anode may be more anisotropic for more rigid materials used for the current collector. A more rigid current collector may include nickel and a less rigid current collector may include copper. The expansion of the anode may be more anisotropic for a rougher surface current collector.

Abstract: Systems and methods for anisotropic expansion of silicon-dominant anodes may include a cathode, an electrolyte, and an anode, where the anode may include a current collector and an active material on the current collector. An expansion of the anode during operation may be configured by a metal used for the current collector, and/or a lamination process that adheres the active material to the current collector. The expansion of the anode may be more anisotropic for thicker current collectors. A thicker current collector may be 10 ?m thick or greater. The expansion of the anode may be more anisotropic for more rigid materials used for the current collector. A more rigid current collector may include nickel and a less rigid current collector may include copper. The expansion of the anode may be more anisotropic for a rougher surface current collector.

Abstract: Systems and methods are provided for high volume roll-to-roll transfer lamination of electrodes for silicon-dominant anode cells.

Abstract: Methods for prelithiating a silicon-containing electrode or electrodes, for example in the form of an electrode roll, are described herein. A method of prelithiating a silicon-containing electrode can include electrically connecting the silicon-containing electrode to a negative terminal of an electrical power source and immersing the silicon-containing electrode in a lithium salt solution. A lithium source can be connected to a positive terminal of the electrical power source and also immersed in the lithium salt solution. A current can be applied to the silicon-containing electrode to thereby intercalate the silicon-containing electrode with lithium. The silicon-containing electrode may comprise a current collector and may subsequently be used as an anode in a lithium-ion electrochemical cell.

Abstract: The present application describes a method of forming an energy storage device that directly adds a lithium layer (such as a lithium foil or otherwise deposited lithium) into the cell stack during cell assembly for prelithiating. The method includes providing a silicon-based anode, providing a cathode, positioning a separator between the anode and the cathode, and disposing a lithium layer between the silicon-based anode and the separator, such that the lithium layer is in contact with the anode.

Abstract: Systems and methods for improved performance of silicon anode containing cells through formation may include a cathode, electrolyte, and silicon containing anode. The battery may be subjected to a formation process comprising one or more cycles of: charging the battery at a 1 C rate to 3.8 volts or greater until a current in the battery reaches C/20, and discharging the battery to 2.5 volts or less. The battery may comprise a lithium ion battery. The electrolyte may comprise a liquid, solid, or gel. The anode may comprise greater than 70% silicon. The battery may be discharged until the current reaches 0.2 C. The battery may be discharged at a 1 C rate or at a 0.2 C rate. The battery may be in a rest period between the charge and discharge.

Abstract: Systems and methods are provided for high volume roll-to-roll transfer lamination of electrodes for silicon-dominant anode cells.

Abstract: Systems and methods are provided for high volume roll-to-roll direct coating of electrodes for silicon-dominant anode cells.

Abstract: Systems and methods are provided for high volume roll-to-roll transfer lamination of electrodes for silicon-dominant anode cells.

Abstract: In some embodiments, an electrode can include a first and second conductive layer. At least one of the first and second conductive layers can include porosity configured to allow electrolyte to flow therethrough. The electrode can also include an electrochemically active layer having electrochemically active material sandwiched between the first and second conductive layers. The electrochemically active layer can be in electrical communication with the first and second conductive layers.

Abstract: In some embodiments, an electrode can include a first and second conductive layer. At least one of the first and second conductive layers can include porosity configured to allow electrolyte to flow therethrough. The electrode can also include an electrochemically active layer having electrochemically active material sandwiched between the first and second conductive layers. The electrochemically active layer can be in electrical communication with the first and second conductive layers.

Abstract: Media files may be prioritized based on user behavior data and social data associated with individual media files. A process of prioritizing media files may include accessing user behavior data associated with individual media files in a set of media files that are stored on a client device of a user or in a cloud-based storage location associated with the user, accessing social data associated with one or more media files of the set of media files that are determined to have been shared on a media file sharing service, and ranking the set of media files based at least in part on the user behavior data and the social data.

Abstract: In some embodiments, an electrode can include a first and second conductive layer. At least one of the first and second conductive layers can include porosity configured to allow electrolyte to flow therethrough. The electrode can also include an electrochemically active layer having electrochemically active material sandwiched between the first and second conductive layers. The electrochemically active layer can be in electrical communication with the first and second conductive layers.

Abstract: In some embodiments, an electrode can include a current collector, a composite material in electrical communication with the current collector, and at least one phase configured to adhere the composite material to the current collector. The current collector can include one or more layers of metal, and the composite material can include electrochemically active material. The at least one phase can include a compound of the metal and the electrochemically active material. In some embodiments, a composite material can include electrochemically active material. The composite material can also include at least one phase configured to bind electrochemically active particles of the electrochemically active material together. The at least one phase can include a compound of metal and the electrochemically active material.

Abstract: Media files may be prioritized based on user behavior data and social data associated with individual media files. A process of prioritizing media files may include accessing user behavior data associated with individual media files in a set of media files that are stored on a client device of a user or in a cloud-based storage location associated with the user, accessing social data associated with one or more media files of the set of media files that are determined to have been shared on a media file sharing service, and ranking the set of media files based at least in part on the user behavior data and the social data.

Abstract: Media files may be prioritized based on user behavior data and social data associated with individual media files. A process of prioritizing media files may include accessing user behavior data associated with individual media files in a set of media files that are stored on a client device of a user or in a cloud-based storage location associated with the user, accessing social data associated with one or more media files of the set of media files that are determined to have been shared on a media file sharing service, and ranking the set of media files based at least in part on the user behavior data and the social data.

Abstract: Constraint programming is used to solve problems that have many variables and that have many possible solutions. An interactive constraint solver application provides additional information to a user if a conflict arises between two choice-constraints so that the additional information can be used to resolve the conflict according to a model-constraint set up by an application developer. The additional information identifies a priority group, or queue, to which the constraint was added. Depending on the particulars included in the additional information, and the model-constraints, the conflict is resolved by the interactive constraint solver application.