Electrochemical Capacitance Properties of Mn3O4 Nanoparticles via Energy Efficient Thermolysis

We demonstrate a facile process for the synthesis of amine-functionalized hausmannite (Mn3O4) nanoparticles. The process is solventless and uses only a mixture of oleylamine and manganese chloride to produce Mn3O4. The size of the nanoparticles is tuned by varying Mn to amine mole ratio. The prepared nanoparticles are monodisperse and show tetragonal structure as characterized by TEM and XRD. The cyclic voltammetry curves are nearly perfect rectangular which indicates excellent capacitive nature of the nanoparticles. A maximum specific capacitance of 125 Fg(-1) is obtained for the nanocrystals in a potential range from -0.1 to 0.7 V with 1 M sodium sulfate solution.