Electrical and electrochemical properties of reduced graphene oxide film for secondary battery electrode

Abstract

We prepared thin layer of reduced graphene oxide (rGO) from reduced graphene oxide powder that dispersed in deionized water and dimethylformamide (DMF) using drop-casting technique. We used carboxymethyl cellulose (CMC) as a binder in order to obtain better surface of rGO film with varied concentration of rGO. We obtained that rGO film prepared using rGO dispersed in deionized water has better surface compare to the ones dispersed in DMF. An addition of CMC into rGO has improved its film surface and increasing amount of rGO resulted higher conductivity of the sample. The cyclic voltammogram (CV) of the rGO film has shown a hysteresis curve that correspond to charging and discharging process. From CV measurement we obtain that rGO-CMC film that prepared using 3 mg/ml rGO dispersed in DI water and blend with CMC has higher specific capacitance of 400 mF/g.