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

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 MXe-ne@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 com-posite 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 experi-mental and theoretical investigations.Therefore,MXene-based MZF_(1) electrode materials enhanced electrochemical properties and improved cyclic durability for the ASC device.