Enhancing the electrochemical studies of dual-doped Mn/Co/SnSe electrodes

Abstract

Mn/Co/SnSe nanoparticles were synthesized using the co-precipitation method with the ratios Mn_xCo_ySn_{(1−x)(1–y)}Se (where x = 0.1–0.5 and y = 0.1–0.5) coded MCSS-1, MCSS-2, MCSS-3, MCSS-4 and MCSS-5 nanoparticles. Mn_xCo_ySn_{(1−x)(1−y)}Se nanoparticles were characterized with X-ray diffraction (XRD), UV-absorbance spectroscopy, and scanning electron microscopy (SEM). The XRD analysis revealed that the Mn_xCo_ySn_{(1−x)(1−y)}Se nanoparticles possess an orthorhombic structure, with average crystallite sizes below 100 nm. The SEM images showed that the surface morphology of the Mn_xCo_ySn_{(1−x)(1−y)}Se nanoparticles was not perfectly spherical, displaying small spherical shapes and rod-like structures. The optical properties were examined using UV–Vis spectroscopy, indicating that the highest absorbance occurred between 200 and 400 nm. The cyclic voltammograms (CV) graph shows the pseudocapacitance nature of the Mn_xCo_ySn_{(1−x)(1−y)}Se nanoparticles. The MCSS-1 electrode has a coulombic efficiency and capacitive retention of 93% and 94.98% whereas the MCSS-4 electrode has 95% and 96.68%. The increase in the coulombic efficiency and capacitive retention from MCSS-1 to MCSS-4 electrodes show an increasing tendency with the incorporation of dual-doped Mn/Co dopants.