| 摘要 |
PURPOSE: To provide a lithium secondary battery which has a long charge and discharge life and excellent stability by composing organic solvent of the mixed solution of a specific substance, and specifying the volume mixing ratio of the specific substance. CONSTITUTION: A lithium secondary battery is composed of a negative electrode 1 which is made of lithium or can charge and discharge the lithium, a positive electrode 3 which is mainly made of amorphous V2 O5 , and electrolyte which is prepared by dissolving at least one kind of lithium salt in organic solvent. In the lithium secondary battery, the mixed solvent of ethylene carbonate and propylene carbonate is used as the organic solvent. The volume mixing ratio of the ethylene carbonate is set to 5 to 35%. The nonaqueous lithium secondary battery being excellent in charge and discharge characteristics and safety is obtained, thereby. |
