Positive electrode for lithium ion capacitor and lithium ion capacitor using the positive electrode, and production methods thereof

A positive electrode for lithium ion capacitor, comprising a positive electrode mixture layer,

• wherein the positive electrode mixture layer contains at least an activated carbon and a binder;
• and
• the positive electrode mixture layer is thermally treated in an inert gas atmosphere or under reduced pressure, so that oxygen-containing functional groups present on the surface of the activated carbon detach from the surface of the activated carbon.

A positive electrode for lithium ion capacitor, comprising a positive electrode mixture layer,

• wherein the positive electrode mixture layer contains at least an activated carbon and a binder;
• and
• when a single-electrode cell is constructed using metallic lithium as a counter electrode, and an using an electrolyte solution in the form of a solution resulting from dissolving LiPF6 to a concentration of 1.0 mol/L in a mixed solvent that contains ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate at a volume ratio of 1:1:1, the potential at an inflection point of a dQ/dV-potential profile calculated on the basis of a CC-CV charge curve at a rate of 1/20 C is 3.05 V or higher.