US Patent Issued to Bluegrass Infrastructure Partners Holdings on Sept. 1 for "Impurity control in lithium-ion battery recycling" (Massachusetts Inventors)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,725,847, issued on Sept. 1, was assigned to Bluegrass Infrastructure Partners Holdings LLC (Toronto).

"Impurity control in lithium-ion battery recycling" was invented by Kee-Chan Kim (Westborough, Mass.) and Eric Gratz (Westborough, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of producing a cathode material precursor having low levels of Cu impurities is described. Heat treating a black mass from a recycled lithium-ion battery stream, wherein the black mass comprises copper metal and cathode material comprising nickel, followed by leaching of the heat-treated black mass with an aqueous acid forms an acidic aqueous leach solution compri...