Abstract:
A method for producing a multi-layer coating on a substrate for an anode or cathode includes preparing a first mixture including a first solvent and a first active material, preparing a second mixture including a second solvent and a second active material, combining the first mixture and the second mixture to form a slurry, and coating the substrate with the slurry. The first solvent and the second solvent are immiscible.
Abstract:
According to one or more embodiments, a method of producing a lithium-ion cell includes constructing a cell defining a cavity housing an electrode assembly including a cathode, an anode, a separator, and an electrolyte, forming the cell to generate formation gas in the cavity, and releasing the formation gas from the cavity. The method further includes placing a solid adsorbent in the cavity adjacent the electrode assembly after the releasing, and sealing the cavity with the solid adsorbent therein such that post-formation gas is adsorbed by the solid adsorbent in the cavity.
Abstract:
A vehicle includes a traction battery and a controller in communication with the battery and programmed to control battery charging in response to a user-selected one of a plurality of charging strategies having different charging rates based on detection of lithium plating in the battery. The charging strategies may include options for faster charging with an urgent or emergency charging strategy selectable a limited number of times to mitigate battery performance degradation associated with lithium plating. A method implemented by a vehicle controller in a vehicle having a traction battery, may include controlling, by the controller, battery charging in response to a user-selected charging strategy selected from one of a plurality of available charging strategies each having a different charging rate and displayed on a user interface in response to detection of lithium plating in the traction battery, at least one charging strategy associated with additional lithium plating if selected.
Abstract:
A vehicle having a traction battery with at least one cell includes a controller coupled to the traction battery and programmed to control charging and discharging of the traction battery in response to detecting lithium plating in the at least one cell indicated by a ratio of differential voltage of the at least one cell as a function of time to cell charging rate of the at least one cell. In various embodiments, the ratio is compared to a threshold associated with current battery state of charge to indicate lithium plating when the ratio is below the threshold. Lithium plating can also be detected based on a measured cell open circuit voltage (OCV) relative to a previously stored OCV value. In various embodiments, the measured OCV value is calculated based on a measured cell voltage and current, and a previously stored cell internal resistance.
Abstract:
In at least one embodiment, a lithium-ion battery is provided comprising a positive electrode, a negative electrode, an electrolyte, and a separator situated between the electrodes. At least one of the electrodes may include a proton absorbing material. The proton absorbing material may be an atomic intermetallic material including a proton absorbed state. The proton absorbing material may react with protons in the electrolyte to reduce moisture formation and cathode degradation in the battery. The proton absorbing material may absorb at least 0.5 wt. % hydrogen and may be present in the anode and/or cathode in an amount from 0.01 to 5 wt. %.
Abstract:
A method of manufacturing a reference electrode for a lithium ion battery comprises charging the battery to a threshold state-of-charge, wherein the battery includes a neutral metal can and a negative electrode, and plating a reference electrode on an interior surface of the neutral metal can by electrically connecting the neutral metal can to the negative electrode, a neutral metal can potential being greater than a negative electrode potential.
Abstract:
A method of manufacturing a reference electrode for a lithium ion battery comprises charging the battery to a threshold state-of-charge, wherein the battery includes a neutral metal can and a negative electrode, and plating a reference electrode on an interior surface of the neutral metal can by electrically connecting the neutral metal can to the negative electrode, a neutral metal can potential being greater than a negative electrode potential.
Abstract:
A fuel cell system includes a plurality of fuel cells. Each of the fuel cells may include a current bypass device that is configured to flow a current responsive to an anode potential exceeding a cathode potential to prevent carbon corrosion within the fuel cell.
Abstract:
A lithium-ion battery component and pre-cured electrode are disclosed, featuring a current collector and a slurry containing graphite, silicon-based particles, and a chemically cross-linkable monomer. Upon initiation, the monomer chemically crosslinks to form a binder that mechanically binds the graphite and silicon-based particles, creating a coating adhered to the current collector the chemically crosslinked binder enables volume expansion during charging and facilitates volume contraction during discharging, maintaining some of the electrode's initial capacity. The chemically cross-linkable monomer is present at a weight percentage relative to the graphite and silicon-based particles, while the current collector is composed of a metal foil. The battery component and pre-cured electrode may increase performance and longevity in lithium-ion batteries through their chemically crosslinked binder and slurry composition.
Abstract:
This disclosure relates to a lithium-ion battery with an enhanced electrode structure and methods for forming such an electrode structure. The electrode may comprise a metal current collector and a multi-layered active material coated thereon, which includes a discrete graphite-rich and a discrete silicon-rich layer. The silicon-rich layer is positioned between and in direct contact with the metal current collector and the graphite-rich layer.