Development of high-performance asymmetric supercapacitors based on MXene and Mn-doped Zn ferrite composites for energy storage applications

In this work, Mn x Zn 1- x Fe 2 O 4 (MZF) ferrite and MXene (Ti 3 C 2 T x ) composites were addressed to enhance the electrochemical performance. MXene is a relatively new material belonging to the 2D layered family and is mainly used to enhance the electrochemical features of electrode materials. The incorporation of MZF material acts as a conductive bridge, affecting the structural stability and electrochemical features of Ti 3 C 2 T x MXene. MZF nanoparticles were embedded with Ti 3 C 2 T x MXene to develop a hybrid MXene@MZF 1 electrode composite. The structural formation of composites was investigated using Raman spectroscopy, XRD, SEM, EDX, TEM, and XPS. The electrochemical examination of the prepared composite revealed a significant increase in specific capacitance. The (MXene) 75 (Mn 0.05 Zn 0.95 Fe 2 O 4 ) 25 electrode material was exposed to a gravimetric specific capacitance of 646.9 F/g at a scanning rate of 5 mV/s. Moreover, an asymmetric supercapacitor (ASC) device was constructed, achieving a specific energy of approximately 47 W·h·kg –1 and a power density of 4937.1 W/kg, respectively. An excellent capacitance retention of 128.9% and coulombic efficiency of 99% were observed after 6000 GCD duty cycles. This study confirmed the good stability of the MXene@MZF 1 electrode compound after experimental and theoretical investigations. Therefore, MXene-based MZF 1 electrode materials enhanced electrochemical properties and improved cyclic durability for the ASC device. • Mn x Zn 1- x Fe 2 O 4 and MXene electrodes were synthesized to develop an ASC device. • The MXene@MZF 1 electrode revealed a specific capacitance of 646.9 F/g. • The prepared hybrid electrode material enhanced the electrochemical performance. • MXene-based device exposed a good specific energy of 47 W·h·kg –1 and power 4937.1 W/kg. • ASC device confirmed significant cyclic stability and efficiency after 6000 cycles.