| 摘要 |
PURPOSE: To provide the secondary battery at a low internal resistance, a high capacity and a high voltage by using the carbon material as a negative elec trode, the Li metal oxide as a positive electrode, and appropriately controlling both the quantity of Li derived from the negative electrode, and appropriately selecting the method for carrying Li derived from the negative electrode. CONSTITUTION: A positive electrode 1 and a negative electrode 2 are respectively formed on collectors 3, 3', and lead terminals 8, 8' are connected to the collectors 3, 3', and one end of each lead terminal is connected to a battery case 6 and a top lid 7. A space between the positive electrode 1 and the Li metal 9 is filled with the electrolyte, and a separator 5 is impregnated with the electrolyte. The negative electrode 2 is made of the carbon material, and formed of the carbon material and the binder. As the positive electrode 1, Li included metal oxide such as Lix CoO2 , Lix NiO2 is used. After assembling the batter, the electrolyte, which is obtained by solving LiPO4 at 1 mole/l of condensation in relation of 1:1 (weight ratio) of ethylene carbonate and diethyl carbonate, is filled, and Li at 120mAh/g is doped from the positive electrode to the negative electrode carbon by the constant current at 0.25mA/cm<2> . |
