Supercapacitor behavior of α-MnMoO4 nanorods on different electrolytes

Graphical abstract: SEM image of α-MnMoO{sub 4} nanorods on FTO substrate. Highlights: ► Synthesis of α-MnMoO{sub 4} nanorods by spin coating method. ► First study on the effect of electrolyte on the pseudocapacitance behavior. ► α-MnMoO{sub 4} nanorods exhibit maximum specific capacitance of 998 F/g. ► At higher scan rates p-TSA electrolyte exhibits superior capacitive behavior. -- Abstract: α-MnMoO{sub 4} nanorods were prepared on conducting glass substrate via sol–gel spin coating method at the optimum doping level. The effect of electrolyte on the pseudocapacitance behavior of the α-MnMoO{sub 4} nanorods was studied using para toluene sulfonic acid (p-TSA), sulfuric acid (H{sub 2}SO{sub 4}) and hydrochloric acid (HCl) as electrolytes. X-ray diffraction analysis reveals the formation of α-MnMoO{sub 4} in monoclinic phase. FTIR spectra contain vibrational bands associated with Mo=O, M–O and Mo–O–Mo bonds. SEM image reveals the formation of nanorods. Supercapacitor behavior has been studied using cyclic voltammetry (CV) analysis. α-MnMoO{sub 4} nanorods exhibit maximum specific capacitance of 998 F/g at a scan rate of 5 mV/s in H{sub 2}SO{sub 4} electrolyte while a specific capacitance of 784 F/g and 530 F/g have been obtained using p-TSA and HCl electrolytes, respectively. At higher scan rates p-TSA electrolyte exhibits superior capacitivemore » behavior than H{sub 2}SO{sub 4}.« less