Patent ID: 8137513

Claim:
A sulfuric acid electrolytic cell to electrolyze sulfuric acid, comprising an anode compartment and a cathode compartment to which said sulfuric acid is supplied, a diaphragm, with said anode compartment and said cathode compartment being separated by said diaphragm, a cathode provided in said cathode compartment, and a conductive diamond anode provided in said anode compartment, wherein: said conductive diamond anode comprises a conductive diamond film formed on a surface of a conductive substrate; a rear face of said conductive substrate is pasted, with conductive paste, on a first current collector comprising a rigid body with a size equal to, or larger than, said conductive substrate; an anode compartment frame constituting said anode compartment is contacted via a first gasket with a periphery on a side of said conductive diamond film of said diamond anode; said diaphragm is contacted with a front face of said anode compartment; with a front face of said diaphragm, a cathode compartment frame constituting said cathode compartment, a second gasket, and said cathode, are contacted in sequence; a rear face of said cathode is pasted with conductive paste to a second current collector comprising a rigid body with a size equal to, or larger than, said cathode; and electric power is supplied from said first current collector to said second current collector via said conductive paste.