Patent ID: 8310810

Claim:
An electric double-layer capacitor comprising: a positive electrode including a positive electrode layer formed on one surface of a first positive electrode current collector; a negative electrode including a negative electrode layer formed on one surface of a negative electrode current collector; a first separator disposed between the positive electrode layer and the negative electrode layer; a second separator disposed between a second positive electrode current collector and the negative electrode current collector; and a lithium ion doped layer disposed between the second separator and one of the negative electrode current collector and the second positive electrode current collector, wherein the negative electrode includes holes penetrating through the negative electrode current collector and reaching the negative electrode layer, an electrode layer is not formed between the second positive electrode current collector and the negative electrode current collector, the positive electrode, the negative electrode, the first separator, the second separator, and the lithium ion doped layer comprise a basic configuration unit, and the electric double-layer capacitor comprises plural basic configuration units.