Partial sulfur doping induced variation in morphology of MnFe₂O₄ with enhanced electrochemical performance for energy storage devices

Manganese ferrite offers several advantages when employed as an electrocatalytic material for supercapacitors, including outstanding cycle stability and energy capacity. When compared to identical-metal sulfides, specific capacitance (C_sp) of MnFe₂O₄ remains inadequate. So, using the hydrothermal synthesis technique, partial sulfur doping of MnFe₂O₄ was achieved to investigate the synergetic effect of oxides and sulfides. Various spectroscopic and microscopic studies demonstrate that adding sulfur atoms into MnFe₂O₄ increases the lattice parameters, which improves electrochemical performance. At a current density around 2 A g⁻¹, then calculating MnFe₂O₄ with partial sulfur doping has a C_sp of 1,201.60 F g⁻¹, that is greater than 784.0 F g⁻¹ of pure MnFe₂O₄. Maximum energy density (E_d) of 93.62 Wh kg⁻¹ was produced with a power density (P_d) of 749 W kg⁻¹. The current study depicts that partial sulfur doping can enhance the electrochemical behavior of MnFe₂O₄. As a result, the present work shows more effective in field of energy storage by enhancing their poor electrochemical performance.