Fabrication of MnSe/WSe2 nanohybrid electrode prepared through hydrothermal method for supercapacitor applications

The advancement of energy storage technology is vital in addressing the worldwide energy challenges which has garnered attention of researchers due to limited availability of non-renewable resources. Energy storage equipment's such as supercapacitor, batteries and capacitors have limitations because of poor electrochemical performance and reduced cycle stability exhibited by electrode materials. In order to assess suitability of electrode material for supercapacitor applications, it was crucial to achieve notably high electrochemical performance and stability. Due to larger values of power, energy density and excellent life cycle pseudocapacitor have gained the attention of researchers. The work employed hydrothermal method to produce MnSe, WSe2 and MnSe/WSe2 composite materials. Various methodologies were employed to ascertain the distinctive features of structural, electrochemical, and morphological attributes. The utilization of a 3-electrode setup yielded findings indicating that the MnSe/WSe2 composite possesses the highest specific capacitance value of 1326 F g−1, a specific energy value of 37 Wh kg−1 and a power density value of 225 W kg−1. The analysis of electrochemical stability of MS@WS composites showed that structural stability over 5000th cycles for 40 h. The Nyquist plot gives numerical value of charge transfer resistance of MS@WS nanohybrids (1.5 Ω) which was smaller than MS (1.7 Ω) and.WS (1.9 Ω). These values suggested that prepared electrode material may have potential to use in supercapacitor applications and other electronic devices.