Patent ID: 8730650

Claim:
A flow through capacitor comprising a stack of at least one repeating unit comprising: an anode; a spacer; and a cathode, wherein the anode comprises a coated anode current collector comprising an anode current collector and an anode electrode coating, the anode electrode coating comprising 50-98.5 dry mass weight % of carbon having a specific surface area of at least 500 m 2 /g, 1-40 dry mass weight % of binder, and 0.5-30 dry mass weight % of cationic polyelectrolyte, wherein the cationic polyelectrolyte is adsorbed onto the carbon; and/or the cathode comprises a coated cathode current collector comprising a cathode current collector and a cathode electrode coating, the cathode electrode coating comprising 50-98.5 dry mass weight % of carbon having a specific surface area of at least 500 m 2 /g, 1-40 dry mass weight % of binder, and 0.5-30 dry mass weight % of anionic polyelectrolyte, wherein the anionic polyelectrolyte is adsorbed onto the carbon.