Mn 3 O 4 /worm-like mesoporous carbon synthesized via a microwave method for supercapacitors

A quick and facile microwave method has been employed to prepare Mn 3 O 4 /worm-like mesoporous carbon (Mn 3 O 4 –MC) composites. Structural and morphological characterizations of worm-like mesoporous carbon and Mn 3 O 4 –MC composites have been carried out using X-ray diffraction, transmission electron microscopy, N 2 adsorption–desorption, and electrochemical measurement. Cyclic voltammograms demonstrate that the Mn 3 O 4 –MC composites perform improved capacitive behavior at the range of −0.8~0.2 V (vs. Hg/HgO electrode) with reversibility. The Mn 3 O 4 –MC composite electrode possesses an enhanced specific capacitance of 266 F g −1 at a sweep rate of 1 mV s −1 .