Technology Outline (Process Description)

Specific capacitance of supercapacitors depends considerably on the architecture of the fabricated electrode, the size of electrolyte ions, the concentration of the electrolyte ions, and the working potential window. Taking into consideration these attributes, we have synthesized a hybrid of CNT-MoS2 possessing a mesoporous nanostructure by the combination of dispersed CVD-grown CNTs, hydrothermally synthesized MoS2 microspheres and investigated the performance for bipolar supercapacitor applications. Furthermore, we studied the effect of electrolyte variation and observed that the aforementioned hybrid electrode performs best in the case of 1 M aqueous Na2SO4 as compared to 1 M aqueous NaCl and 1 M aqueous NaOH, owing to varying ionic size and the charge carried by an electrolyte ion. This gives an insight into the fundamental aspects of electrochemical reactions involved in the charge storage mechanism of supercapacitors and also fathoms the importance of the selection of electrolytes for attaining better supercapacitor performance.