| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium secondary cell that can suppress degradation of cell property by water and hydrofluoric acid remaining in nonaqueous electrolyte solution, in the condition that a cell is charged and that is excellent in respect of cycle property and reliability. SOLUTION: A lithium secondary cell comprises a electrode body 1 is constituted by inserting a separator 4 between a positive pole plate 2 and a negative pole plate 3 and winding or stacking it and employs nonaqueous electrolyte solution including lithium combination as electrolyte. Total concentration of water (H2O) and hydrofluoric acid (HF) included in nonaqueous solution within cell is set to less than 10,000 ppm. |
