SEAWATER BATTERY CIRCULATION SYSTEM, SEAWATER BATTERY, CATHODE OF SEAWATER BATTERY AND FABRICATION METHOD THEREOF

A seawater battery includes an anode and a cathode corresponding to the anode. The cathode cooperates with the anode to produce a current and includes a metal substrate and a mixture coating layer. The mixture coating layer covered on the metal substrate includes a conductive polymer material and a plurality of carbon nanotubes mixed with the conductive polymer material.