Iowa State University Research Foundation Inc

Ut-Battelle, Inc.

Abhishek Sarkar

Cajetan Ikenna Nlebedim

Mariappan Parans Paranthaman

Matthew J Kramer

Cajetan Ikenna Niebedim

Mark Christopher Haase

Thomas Lograsso

Pranav Shrotriya

Pranav Shrotiya

Somashekara Adinarayanappa

Fast charging of a lithium-ion battery at 4C rate or 5C rate or more is improved by applying an external magnetic field relative to the battery to establish magnetic field lines that extend in a direction of primary movement of lithium ions toward the graphite anode during fast charging. Deleterious degradation of the graphite anode from repeated fast charging can be reduced or eliminated by practice of the invention.

Magnetic field-assisted fast charging of lithium-ion batteries

An efficient and green method for selective extraction of Li from end-of-life secondary LIBs of any capacity and size is provided. Electrochemical driven selective lithium deposition is targeted at the anode/separator interface of the end-of-life LIB. The deposited Li is recovered by processing of an opened or dismantled battery using only distilled or de-ionized water. The process not only enables the recovery of the plated lithium at the anode/separator interface, but also extracts the lithium from the organic salts and/or inorganic salts in the solid electrolyte interface (SEI) layers and from the electrolyte in the separator. In addition, the method partially strips the cyclable Li from the cathode and concentrates it at the anode/separator interface. The concentrated Li is extracted by using aqueous solution such as distilled or de-ionized water followed by recovery of the Li from aqueous solution. After Li recovery from the anode, the method can also enable the recovery of battery-grade graphite.

Lithium recovery via charging of lithium-ion batteries

Embodiments of the present invention provide an electromagnet alignment system for AM or 3D printing technology providing improved in-situ alignment of the magnetic particulate material as it is dispensed during deposition to form a 3D shape. In-situ alignment of the magnetic particulate material can be controlled to be unidirectional or multi-directional.

Additive manufacturing with in-situ magnetic field source

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Ames, IA, United States of America

Abhishek Sarkar