ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,545,974, issued on Feb. 10, was assigned to SK INNOVATION Co. LTD. (Seoul, South Korea).
"Method for recovering active metal of lithium secondary battery" was invented by Hyeon Hui Lee (Daejeon, South Korea), Ji Yun Park (Daejeon, South Korea), Young Bin Seo (Daejeon, South Korea), Seung Ok Lee (Daejeon, South Korea) and Sung Real Son (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a method for recovering an active metal of a lithium secondary battery, a sulfuric acid solution is added to a lithium metal composite oxide so as to prepare a sulfated active material solution. A transition metal is extracted from the sulfated active ...