| 摘要 |
PURPOSE:To obtain a lithium secondary battery having high energy density by using manganese oxide obtained by acid-treating Ca2MnO4 as a positive active material. CONSTITUTION:Manganese oxide obtained by acid-treating Ca2MnO4 is used as a positive active material of a lithium secondary battery using lithium or a lithium alloy as a negative active material. Ca2MnO4 is immersed in an acidic solution containing at least one acid selected from a meneral acid such as hydrochloric acid, nitric acid, sulfuric acid, and phosphoric acid, or an organic acid such as formic acid and acetic acid, and controlled in pH5 or less, and stirred at room temperature for several days to remove calcium, then a solid material is washed and dried to obtain manganese oxide. The lithium secondary battery having high energy density and high performance can be obtained. |
