ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,456,724, issued on Oct. 28, was assigned to LG Energy Solution Ltd. (Seoul, South Korea).

"Irreversible additive, positive electrode material including irreversible additive, and lithium secondary battery including positive electrode material" was invented by Sung Chul Lim (Daejeon, South Korea), Min Chul Jang (Daejeon, South Korea) and In Sung Uhm (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "An irreversible additive includes an oxide having a trigonal crystal structure and represented by Formula 1, and a coating layer positioned on a surface of the oxide and including a compound represented by Formula 2. A positive electrode mat...