Facile One-pot Synthesis of Binder-free MnCo2O4 Nanosheets as Efficient Supercapacitor Electrode Material

The engineered nanostructured electrode material is an important factor in enhancing the performance of supercapacitors. Herein, a facile procedure was reported for the electrosynthesis of MnCo2O4 nanosheets through one-pot electrodeposition method. The obtained MnCo2O4 nanosheets have been characterized using field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and energy-dispersive X-ray spectroscopy (EDX) techniques. The results showed that MnCo2O4 nanosheets with multiple walls had been successfully prepared. The electrochemical evaluation revealed that the as-prepared MnCo2O4 electrode delivered a high specific capacitance of 1198 mF cm^-2 at the current density of 1 mA cm^-2 and demonstrated outstanding cycling performance. The binary nature of the MnCo2O4 nanosheets, along with the unique nanosheet architecture with accessible void spaces for the transfer of electrolyte ions and electrons, is responsible for these remarkable properties. These results demonstrate that the present MnCo2O4 nanosheets with outstanding electrochemical properties can be considered as promising candidates for energy storage systems.