Microwave-mediated synthesis of tetragonal Mn 3 O 4 nanostructure for supercapacitor application.

The development of electrode materials plays a vital role in energy storage applications to save and store energy. In the present work, the synthesis of nanorod shaped Mn ₃ O ₄ supported with amorphous carbon (Mn ₃ O ₄ /AC) is reported by the microwave method for supercapacitor application. The as-prepared electrode material was then characterized using microscopic and spectroscopic techniques. The electrochemical supercapacitor performance of Mn ₃ O ₄ /AC was examined by the cyclic voltammetry and galvanostatic charge-discharge method inside the three-electrode assembly cell. The results showed that the Mn ₃ O ₄ /AC delivers the excellent capacitance value of the 569.5 Fg ^-1 at the current load of 1 Ag ^-1 , higher than the previously reported Mn ₃ O ₄ based electrodes. The better performance of the Mn ₃ O ₄ /AC is credited to the excellent redox behaviour of the Mn ₃ O ₄ and the presence of the amorphous carbon, which facilitated the fast ion interaction between the electrode and electrolyte during the electrochemical reaction.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)