| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that, in such circumstance where a lithium ion secondary battery widely used as a power source for a portable electronic apparatus becomes very difficult to display the polarity of a terminal electrode along with miniaturization, loading with incorrect polarity of electrodes may cause malfunction and accident due to heating because a conventional lithium ion secondary battery employs different materials for active materials constituting a positive electrode and a negative electrode.SOLUTION: A battery is developed by using an active material that functions as a secondary battery even if the same row material is used for the active material constituting both the positive electrode and the negative electrode to manufacture a secondary battery of no polarity. Since there is no discrimination between terminal electrodes, no attention is required to be payed to loading direction for an easy loading process. Further, since there is no necessity for manufacturing a positive electrode layer separately from a negative electrode layer, a manufacturing step of a battery is simplified as well. |
