| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery with a negative electrode material of high capacity exceeding the conventional carbonaceous material. SOLUTION: This electric energy storage device contains a positive electrode, a negative electrode, and an ionic conductor, the negative electrode consists of a carbon element and at least one metal element selected from the group comprising Ag, Zn, Al, Ga, In, Si, Ge, Sn, and Pb, the total absorption amount of an alkali metal element when it is absorbed is 900 mAh/ml, and the reversible absorption amount is 70% or more of the total absorption amount. The manufacturing method of the electric energy storage device capable of using repeatedly and the negative electrode material used for this device is provided. |
