Patent ID: 8203826
Filing Date: 2012-06-19
Classification: H01G,Y02E,Y02T

Abstract:
1. A lithium ion capacitor comprising: a positive electrode, a negative electrode, and a non-protonic organic solvent electrolytic solution of a lithium salt as an electrolytic solution, wherein a positive electrode active material is a material capable of reversibly doping a lithium ion and/or an anion; a negative electrode active material is a material capable of reversibly doping a lithium ion; the lithium ion is doped in advance to either one or both of the negative electrode and the positive electrode so that a positive electrode potential after the positive electrode and the negative electrode are short-circuited is 2.0 V (relative to Li/Li when capacitance per unit weight of the positive electrode is C the weight of the positive electrode active material is larger than the weight of the negative electrode active material.