Patent ID: 6955694

Claim:
A method of making an electrode structure for use in a double layer capacitor, comprising the steps of: providing a current collector plate having a length and a width wherein the length is greater than the width; applying a first slurry including conducting carbon powder and a binder to a current collector plate while moving the current collector plate lengthwise; curing the applied first slurry to form a primary coating; applying a second slurry that includes activated carbon powder, a solvent and a binder to the primary coating while moving the current collector plate lengthwise; and curing the applied second slurry to form a secondary coating, thereby forming a first electrode removing portions of the first slurry at edges of the current collector plate while moving the current collector plate lengthwise; and removing portions of the second slurry at the edges of the current collector plate to form contact edges while moving the current collector plate lengthwise.