초록

The invention relates to a non-aqueous electric double layer capacitor which has a high power output, a high energy density, and has excellent voltage-retention properties.

대표청구항 ▼

1. An electric double layer capacitor comprising a positive electrode and a negative electrode, each comprising a carbonaceous material as the main component, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte, wherein said separator comprises a sheet

1. An electric double layer capacitor comprising a positive electrode and a negative electrode, each comprising a carbonaceous material as the main component, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte, wherein said separator comprises a sheet having a thickness of from 10 to 80 .mu.m and a porosity of from 50 to 85%, and a nonwoven fabric having a thickness of from 10 to 80 .mu.m, a maximum pore diameter of from 10 to 60 .mu.m and an air permeability of from 10 to 200 cm3/(cm2?sec), laminated one on the other.