ALEXANDRIA, Va., July 30 -- United States Patent no. 12,374,685, issued on July 29, was assigned to NATIONAL SYNCHROTRON RADIATION RESEARCH CENTER (Hsinchu, Taiwan).

"Polymorphic lithium-silicon compound for use in pure silicon anode of lithium-ion battery and use thereof" was invented by Shi-Wei Chen (Hsinchu, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polymorphic lithium-silicon compounds for use in pure silicon anode of lithium-ion battery and use thereof are provided. The pure silicon anode includes nucleuses which have one or more structures of Li4.1Si_Cmcm, Li13Si4_Pbam, Li2Si_C12m1, and LiSi_I41/AZ. It was generally believed Li4.1Si_Cmcm to be a high-temperature stable phase, not presenti...