Electrosorption and electrochemical properties of activated-carbon sheet electrode for capacitive deionization

Electrosorption is a promising method for water purification and desalination. Activated carbon sheet (ACS) electrodes with commercially viable mechanical strength, electrosorption capacity, and electro-chemical properties were fabricated, and their kinetic characteristics were determined. The ACS electrodes were obtained by coating activated carbon powder with 10 wt% polyvinylidene fluoride (PVdF) binder in a thin sheet-like formulation for the electrosorption process. The electrosorption and kinetic data were successfully described both Langmuir and potential-independent Langmuir isotherms, and pseudo-second-order model. The electrosorption efficiency of ACS electrodes prepared with 10 wt% PVdF was 91.6% at sodium chloride concentration and applied potential of 100 mg/L and 1.2 V, respectively. Thus, the performance of the ACS electrodes prepared in this study indicates that they are suitable for electrosorption applications. (C) 2014 Elsevier B.V. All rights reserved.