Sonochemical synthesis, characterization, and electrochemical properties of MnMoO4 nanorods for supercapacitor applications

• Published in: Materials chemistry and physics Vol. 147; no. 3; pp. 836 - 842
• Main Authors: Veerasubramani, Ganesh Kumar, Krishnamoorthy, Karthikeyan, Sivaprakasam, Radhakrishnan, Kim, Sang Jae
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.10.2014
• Subjects: Electrochemical properties; Nanostructures; Oxides; X-ray photo-emission spectroscopy (XPS); Oxides; Electrochemical properties; Nanostructures; X-ray photo-emission spectroscopy (XPS)
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2014.06.028

In this article, we reported the preparation of manganese molybdate (MnMoO4) nanorods by a facile sonochemical method and investigated its electrochemical properties for supercapacitor applications. The microstructure, surface morphology and composition were characterized by using field emission scanning electron microscope (FE-SEM), high resolution-transmission electron microscopy (HR-TEM), X-ray diffraction analysis (XRD), Raman spectroscopy and X-ray photo electron microscopy (XPS). The cyclic voltammetry (CV) curves of sonochemically synthesized α-MnMoO4 nanorods revealed the presence of redox pairs suggesting the pseudocapacitive nature of MnMoO4. A maximum specific capacitance of the α-MnMoO4 nanorods was about 168.32 F g−1 as observed from the galvanostatic charge–discharge (GCD) analysis at a constant current density of 0.5 mA cm−2. Long term cyclic stability study revealed that about 96% of initial capacitance was retained after 2000 cycles. [Display omitted] •MnMoO4 nanorods were synthesized by sonochemical method.•FE-SEM studies show the rod like morphology of MnMoO4.•XRD studies show the presence of monoclinic phase of α-MnMoO4.•Specific capacitance of 168.32 F g−1 was achieved using charge–discharge analysis.