LITHIUM ION SECONDARY BATTERY

A lithium ion secondary battery includes: a positive electrode, a negative electrode, a separate located between the positive electrode and the negative electrode, and an electrolytic solution. The negative electrode includes a negative electrode active material which contains a material containing silicon and carbon, and a compound containing a first element. The electrolytic solution contains an imide salt which contains the first element and an imide anion. The first element is any one or more elements selected from the group consisting of K, Na, Mg, Ca, Cs, Al, and Zn.