Deionizing device

A deionization apparatus comprising:

• a porous electrode including a porous substrate, wherein the porous substrate is formed of a non-woven fabric, a first porous nanofiber web having first pores and laminated on one surface of the non-woven fabric and a second porous nanofiber web having second pores and laminated on the other surface of the non-woven fabric, and the first porous nanofiber web and the second porous nanofiber web is formed of electrospun and accumulated nanofibers, the nanofibers being made of a polymer material;
• a non-pore ion exchange membrane formed on the second porous nanofiber web;
• a conductive film formed on the first porous nanofiber web, the conductive film being made of a conductive material, wherein the conductive material is coated on inner surfaces of the first pores;
• a counter electrode facing and spaced from the non-pore ion exchange membrane;
• a spacer located between the non-pore ion exchange membrane and the counter electrode, and having a flow passage through which water to be treated passes;
• and
• an insulating layer in contact with the counter electrode or the porous electrode,
• wherein a thickness of the first porous nanofiber web and the second porous nanofiber web is thinner than that of the non-woven fabric, and
• wherein the porous electrode, the non-pore ion exchange membrane, the spacer, the counter electrode, and the insulating layer are rolled into a spiral shape.