ELECTRIC DOUBLE LAYER CAPACITOR

摘要

PROBLEM TO BE SOLVED: To obtain an electric double layer capacitor in which increase in electric resistance of a separator or leakage of electrolyte can be avoided even when an electrode expands/contracts through charge/discharge. SOLUTION: A porous electrolyte reservoir 8 which can be impregnated with electrolyte through contact with a separator 7 is arranged in an outer case 1. Average pore size of the electrolyte reservoir 8 is set larger than that of the separator 7. The electrolyte reservoir 8 is impregnated with a predetermined amount of electrolyte such that the space factor of electrolyte to the pores of the separator 7 becomes 50% or more during full charge, and the space factor of electrolyte to the pores of the electrolyte reservoir 8 becomes 100% or less during full discharge. COPYRIGHT: (C)2007,JPO&INPIT