| 摘要 |
PURPOSE:To obtain a nonaqueous electrolyte secondary battery with excellent characteristics by using a specific lithium containing vanadium oxide for the active material of a positive electrode, and adjusting the capacity ratio per unit area of a negative electrode against the positive electrode to 2.6-13. CONSTITUTION:In a lithium secondary battery using a lithium metal or a lithium alloy for a negative electrode active material, a lithium containing vanadium oxide expressed by the formula I or II is used for a positive electrode active material, and the thickness is adjusted so that the capacity ratio per unit area between a negative electrode 2 and a positive electrode 1 is preferably set to 3-7, where M indicates Na, K, Rb or Cs and 0<=x<=0.6, -0.5<=y<=0.3, 0<a<=0.5. A nonaqueous material such as LiPF6, LiAsF6, LiClO4 through which lithium ions can be electrochemically moved with the positive/negative electrode active materials is used for an electrolyte. The battery has a large capacity and a high potential and excellent cycle characteristics, and a stable charge/ discharge can be performed. |
