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Supercapacitor is a high power density energy storage device which complements the lack of  batteries and conventional capacitors. One material which has a great potential in the  manufacture of composite supercapacitor is spinel ZnCo 2 O 4 /carbon nano tube and abreviated in  the later case as ZCO/CNT. Composition variations in ZCO/CNT composites is expected to the  performance of supercapacitor especially the dielectric properties and specific capacitance. In this study the composite ZCO/CNT was made from raw materials of ZCO nano crystal which  was prepared from previous research on which employing sonochemistry technic, carbon nano  tube, and 1-methil 2 pyrolidine. A screen printing method was used in this experiment to  deposite the composite on silver substrates. The separator in between of two identical composite  structures was prepared from isotactic polypropylene. We used KOH 6 M which was  implemented as electrolyte of the composites. Characterization of composite structures has been  performed using X-RD, while the morphology characterization using SEM. It was found that the  dielectric supercapacitor increase by increasing of mass fraction of ZCO in the composite. The highest dielectric constant is reached at 1.89 x 10 6 and the specific capacitance of 81 F/g for 3:1 mass ratio of ZCO : CNT at 100 Hz.

ZCO/CNT Composites Coated on Silver Substrates as Symmetric Supercapacitor and their Dielectrics Characterization at Various Frequencies