| 摘要 |
PURPOSE:To increase battery performance by constituting with a positive electrode, a negative electrode comprising lithium or lithium alloy, and electrolyte solution, and using organic electrolyte solution prepared by adding a specified trialkylphosphine to a specified solute and a specified solvent as the electrolyte solution. CONSTITUTION:Trialkylphosphine indicated in the formula R3P is added as a stabilizer to an electrolyte using lithium salt of Lewis acid indicated in the formula LiMFn as a solute. In the formula, M is P, As, Sb, or B, n is 6 when M is P, As, or Sb, and 4 when M is B. The amount of lithium salt of Lewis acid is usually 0.1-3mol/dm<3> in the electrolyte. The amount of trialkylphophine is 0.1-2 times mol of lithium salt of Lewis acid. Thereby, thermostability of electrolyte is increased and deterioration in performance during storage is retarded. |
