| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery which exhibits excellent cycle characteristics, even if an electrode active material other than graphite is used.SOLUTION: A lithium ion secondary battery includes a negative electrode using a negative electrode material produced by compounding an electrode active material, a conductive assistant and a binder, and an electrolyte. The electrode active material is one kind selected from a group consisting of silicon, silicon monoxide, tin, aluminum, antimony, cadmium, zinc/tin alloy, silicon carbide, nickel/tin alloy and Mg2Sn, and the electrolyte is produced by compounding (A) lithium carboxylate salt and (B) boron trifluoride and/or boron trifluoride complex, or (E) lithium carboxylate salt-boron trifluoride complex, and (C) organic solvent. |
