| 摘要 |
PROBLEM TO BE SOLVED: To improve withstand voltage, energy density in high capacity, and reliability of a charge/discharge cycle, by providing a positive electrode containing activated carbon and a lithium containing transition metal oxide, a negative electrode containing the activated carbon, and an organic electrolyte containing quarternary onium salt. SOLUTION: Activated carbon and a lithium containing transition metal oxide, that is a composite oxide of lithium and one or more kinds of transition metals selected from a group composed of V, Fe, Co, Mn, Ni, W, Zn are contained in a positive electrode, or Li, Co, Ni(1-y)O2, or Li2Mn2O4 (where, 0<x<2.0<=y <=1, 0<z<2) is contained. A negative electrode body can be produced similarly to a positive electrode body, mixture of activated carbon powders and a conductive agent is used instead of the mixture of activated carbon powders, the lithium containing transition metal oxide, and a conductive material. In addition, quarternary-onium salt is contained in an organic electrolyte, and its concentration is 0.5-2.5 mol/L, and lithium salt concentration is 0.1-1.5 mol/L. |
