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 electrochemical 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.