NiFe-LDH/MoS<sub>2</sub>/MXene Nanocomposites as an Electrode Material for Battery-Type Supercapacitors
Dana Susan Abraham, Mari Vinoba, Margandan Bhagiyalakshmi
Abstract
Rational design and structural engineering of the electrode material are essential for high-performance supercapacitors. In this study, we have designed a ternary nanocomposite NiFe x /MM 100– x, integrating NiFe-LDH, MoS 2, and MXene through a two-step process, solvothermal followed by the incipient wet impregnation method. The high capacity of NiFe-LDH and the exceptional electrical conductivity of MoS 2 and MXene make the NiFe x /MM 100– x composite a potential electrode material for a high-performance battery-type supercapacitor. The NiFe 60 /MM 40 composite exhibited a remarkable specific capacity of 349.49 mAh g –1 at 1 A g –1 . A hybrid supercapacitor device (NiFe 60 /MM 40 //MM) was constructed, assembling NiFe 60 /MM 40 as the positive electrode and MM as the negative counterpart, which delivered a superior power density of 800 W kg –1 at an energy density of 58.66 Wh kg –1 . The NiFe 60 /MM 40 //MM device revealed outstanding cyclic stability by retaining 84% of the initial capacity even after enduring 5000 cycles at 10 A g –1 . The above results explored the potential of 2D layered materials as an electrode material in energy storage applications.