Capacitive electrode for deionization, and electrolytic cell using same

Abstract

Provided is an electrode using a polymeric solution containing a cation exchanger or an anion exchanger, and a capacitive electrolytic cell for deionization using the same.

1 . A capacitive deionization electrochemical cell, comprising:
 any one electrode selected from an anode manufactured by containing a cation exchange resin therein and a cathode manufactured by containing an anion exchange resin therein; and   a spacer layer separating the anode from the cathode.   
     
     
         2 . The capacitive deionization electrochemical cell of  claim 1 , wherein the electrode is manufactured by preparing a slurry containing a polymer resin having the cation exchanger or a polymer resin having an anion exchanger and an electrode active material, and then coating the slurry on a current collector. 
     
     
         3 . The capacitive deionization electrochemical cell of  claim 2 , wherein the polymer resin having a cation exchanger is a polymer resin having at least one cation exchanger selected from the group consisting of a sulfonic acid group (—SO 3 H), a carboxyl group (—COOH), a phosphonic group (—PO 3 H 2 ), a phosphinic group (—HPO 2 H), an arsenic group (—AsO 3 H 2 ), or a selenonic group (—SeO 3 H), and the polymer resin having an anion exchanger is a polymer resin having at least one anion exchanger selected from the group consisting of a quaternary ammonium salt (—NH 3 ), primary, secondary, or tertiary amine (—NH 2 , —NHR, —NR 2 ), a quaternary phosphonium group (—PR 4 ), or a tertiary sulfonium group (—SR 3 ). 
     
     
         4 . The capacitive deionization electrochemical cell of  claim 1 , wherein the electrode active material is at least one active carbon based material selected from an active carbon powder, an active carbon fiber, a carbon nanotube, and a carbon aerogel; one or two or more metal oxide based materials selected from RuO 2 , Ni(OH) 2 , MnO 2 , PbO 2 , and TiO 2 ; and a mixture thereof. 
     
     
         5 . The capacitive deionization electrochemical cell of  claim 1 , wherein the current collector is in a sheet, thin film, or plain weave gold net form, including aluminum, nickel, copper, titanium, iron, stainless steel, graphite, or a mixture thereof. 
     
     
         6 . The capacitive deionization electrochemical cell of  claim 1 , wherein the current collector is in an organic resin sheet, thin film, or plain weave gold net form, selected from an organic polymer including polyvinylidenefluoride, polystyrene, polyester, or polyolefine. 
     
     
         7 . The capacitive deionization electrochemical cell of  claim 1 , wherein the slurry further contains a conductive material. 
     
     
         8 . The capacitive deionization electrochemical cell of  claim 7 , wherein the conductive material is conductive carbon black. 
     
     
         9 . A deionizing apparatus for water treatment, using the electrochemical cell of  claim 1 . 
     
     
         10 . A metal collecting apparatus for collecting heavy metals or noble metals in waste water, using the electrochemical cell of  claim 1 .