| 摘要 |
PURPOSE:To achieve a high voltage to enhance the cycle characteristic of a battery in a heavily-loaded discharge condition so as to enhance the performance of the battery by using a mixed solvent of acetylbutyrolactone and diester carbonate as the organic solvent of the electrolyte. CONSTITUTION:A nonaqueous electrolyte secondary battery comprises an anode 1 having an anode active material applied to an anode collector 9 and a cathode 2 having a cathode active material applied to a cathode collector 10, both of which are wound together with a separator 3 between them, this roll being stored in a rechargeable battery can 5 with insulating plates placed on the top and bottom of the roll. In the cathode, the cathode active material containing LixMO2 (M represents one kind or more of transition metals, preferably at east one kind selected from Co and Ni; 0.05<=x<=1.10) is used. A carbonaceous material, for example, is used as the anode active material. Li salts dissolved in an organic solvent are used as the electrolyte. A mixed solvent of two kinds or more, i.e., acetylbutyrolactone and diester carbonate, is used as the organic solvent. |
