| abstract |
An electrochemical capacitor that achieves high energy density and has excellent long-term stability is provided. The electrochemical capacitor of the present invention is an electrochemical capacitor comprising a positive electrode and a negative electrode, and a non-aqueous electrolyte is interposed between the positive and negative electrodes, the non-aqueous electrolyte containing a halide. It is characterized by doing. The electrochemical capacitor of the present invention is an electrochemical capacitor comprising a pair of electrodes consisting of a positive electrode and a negative electrode, and an aqueous electrolyte solution interposed between the electrodes, wherein the aqueous electrolyte solution is an aqueous solution containing an iodide salt. It is characterized by being. [Selection] Figure 1 |