A lithium ion secondary battery and a method for producing the same

A lithium ion secondary battery, comprising:

• an electrode body comprising a positive electrode, a negative electrode and a separator therebetween which are stacked or wound;
• and a nonaqueous electrolyte liquid,
• wherein the negative electrode has a negative electrode composition layer mainly composed of a negative electrode active material provided on at least one surface of a negative electrode current collector, the negative electrode active material including a materials S including Si,
• wherein assuming that a total of all negative electrode active materials included in the negative electrode is 100 mass %, a content of the material S is 5 mass % or more,
• wherein the nonaqueous electrolyte liquid comprises propylene carbonate and a chain carbonate as a solvent,
• wherein a volume content of the propylene carbonate in the solvent is 10 to 50 volumes %,
• wherein the positive electrode comprises a positive electrode composition layer comprising a metal oxide comprising Li and a metal M except for Li as a positive electrode active material provided on at least one surface of a positive electrode current collector, and
• wherein the lithium ion secondary battery has an upper limit voltage in charge is 4.35 V of more.