Patent ID: 9187348
Filing Date: 2015-11-17
Classification: C02F,H01B

Abstract:
1. An electrode for capacitive deionization comprising: an active material; a waterborne polyurethane; and a conducting agent, wherein the active material is active carbon, wherein the electrode is a product obtained by coating a composition for an electrode active material on a support and drying the composition, the composition including a uniform dispersion of the active material, a waterborne polyurethane dispersion, the conducting agent, and an amphiphilic solvent, the amount of the waterborne polyurethane of the electrode is in a range of about 3 to about 11.1 parts by weight based on 100 parts by weight of the active material in the electrode, the conducting agent is carbon black, vapor growth carbon fiber (VGCF), or graphite, and the amount of the conducting agent is in the range of 3 to 20 parts by weight based on 100 parts by weight of the active material, wherein the waterborne polyurethane is a product of reaction of a prepolymer, the prepolymer being prepared by reacting components consisting of a polytetramethylene ether glycol with an isophorone diisocyanate and dimethylol butanoic acid.