Electrochemical capacitor

Abstract

The disclosed electrochemical capacitor includes: a positive electrode including a positive electrode current collector, and a positive electrode mixture layer containing activated carbon, and supported on the positive electrode current collector; a negative electrode including a negative electrode current collector, and a negative electrode mixture layer containing a negative electrode active material into which lithium ions are reversibly doped, and supported on the negative electrode current collector; and an electrolyte solution including an electrolyte containing lithium ions and anions, and a nonaqueous solvent. The ratio of the amount of the anions to the surface area of the positive electrode mixture layer is 1.5 μmol/m2 or more and 2.4 μmol/m2 or less.

Dependencies are inferred from the claim text.