摘要 |
PROBLEM TO BE SOLVED: To combine (hybridize) the function of a lithium ion cell and an electric double layer capacitor on the level of element, and to rationalize the structure by making the structural element of each functions common. SOLUTION: The electric double layer capacitor is formed in the cell 1 by the method of sharing a partial structure of the cell 1, for example, a sealed container 11, a separator 17, an electrolyte, and limited part or whole part of a current collector. |