| 摘要 |
This invention provides a nonaqueous lithium-type storage element using an activated carbon having a specific porous structure in a positive electrode. A storage element using a conventional carbonaceous material in a positive electrode has a problem that, although the capacitance is large, the output characteristics are disadvantageously unsatisfactory. The nonaqueous lithium-type storage element using a material, which can occlude and release lithium ions in a negative electrode, can improve output characteristics while maintaining the energy density of the storage element at a substantially equal value by using, in a positive electrode, an activated carbon, satisfying 0.3<V1≰0.8 and 0.5≰V2≰1.0 wherein V1 represents the amount of mesopores derived from pores having a diameter of not less than 20Åand not more than 500Å, cc/g; and V2 represents the amount of micropores derived from pores having a diameter of less than 20Å, cc/g.
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