ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,531,237, issued on Jan. 20, was assigned to TDK Corp. (Tokyo).
"Lithium ion secondary battery" was invented by Ryosuke Kido (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lithium ion secondary battery includes: a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and an electrolytic solution. The negative electrode includes a negative electrode active material which contains silicon or a silicon alloy and a compound containing a first element, the electrolytic solution contains an imide salt which contains the first element and an imide anion, and the first element is any one...