Patent ID: 7829136

Claim:
A method of producing a bipolar cell electrode, comprising: coating a first side of a collector with a first active material having a first porosity; compressing the coated first side of the collector at a first pressure; coating a second side of the collector opposite the first side with a second active material having a second porosity; and compressing the coated second side of the collector at a second pressure to form a bipolar cell electrode, the first active material coating exhibiting a porosity of about 35% to about 45% after compressing the coated collector at the first pressure and the second active material coating exhibiting a porosity of about 30% to about 40% after compressing the coated collector at the second pressure, the first pressure being greater than the second pressure such that the first pressure is from about 200 to about 600 MPa and the second pressure is from about 10 to about 200 MPa.