| 摘要 |
PURPOSE:To improve charge-discharge efficiency and cycle life by using an electrolyte prepared by adding a quaternary ammonium salt and a thiophene derivative into an organic solvent in which a lithium salt is dissolved. CONSTITUTION:In a lithium secondary battery in which manganese dioxide is used in a positive electrode 4 and metallic lithium is used in a negative electrode 6, an electrolyte prepared by adding a quaternary ammonium salt into an organic solvent in which a lithium salt is dissolved and furthermore adding a thiophene derivative thereto is used. The amount of the quaternary ammonium salt added is 0.01-1.0mol/l based on the volume of the organic solvent and that of the thiophene added is also 0.01-1.0mol/l based on the volume of the organic solvent. Charge-discharge efficiency and cycle life are increased without adverse effect on ionic conductivity and the electrochemical reaction of the lithium electrode. |
