Systematic studies of MnO$_{\mathrm{2}}$/MWCNT nanocomposite for supercapacitor applications.

We have synthesized MnO$_{\mathrm{2}}$ multiwall carbon nanotube composites (MnO$_{\mathrm{2}}$-CNT) with CNT concentrations of 1, 4, and 10 mg/ml in the reaction mixture. The phase purity of the synthesized nanocomposites was evaluated using X-ray diffraction and the MnO$_{\mathrm{2}}$-CNT morphology was studied using conventional transmission electron microscopy (TEM). The electrodes of MnO$_{\mathrm{2}}$/CNT nanocomposites were prepared by coating a slurry of synthesized materials, PVDF binder, and carbon black [wt. ratio 80:10:10] onto Ni mesh. The electrodes were electrochemically characterized using cyclic voltammetry at various scan rate from 20 mV/s -- 200 mV/s. The charge-discharge and cycleability studies were carried out at various current rate between 0.5A/g -- 5A/g using MnO$_{\mathrm{2}}$/CNT electrodes, Pt foil, and Ag/AgCl as working, counter, and reference electrodes, respectively. The detailed results will be presented at the meeting.