Synthesis and Characterization of Nickel Hydroxide-Impregnated Iron-Based Metal-Organic Framework as Cathode Materials for Supercapacitor Application

Abstract

Super capacitors, Also Known As Electrochemical Capacitors, Are Devices Used For Storing Energy That Fills The Gap Between Conventional Capacitors And Batteries. They Are Known For Their High Power Density, Quick Charging And Discharging Cycles, And Long Life Span. They Are Well Suited For Applications, Including Portable Electronics, Electric Vehicles, And Grid Energy Storage. Importantly, Super capacitors' Performance Depends On The Materials Used For Electrodes. Nickel Hydroxide Is Widely Recognized For Its Excellent Redox Properties And High Specific Capacitance, Making It A Promising Electrode Material For Super capacitors. However, Several Challenges Hinder Its Application. Making Hybrid Materials Is The Best Option To Increase The Capacitance Of Electrode Material And To Overcome The Limitation Of A Single Electrode Material. The Combination Of High Surface Area And Structural Benefit Of Metal-Organic Framework (Mof)With The Excellent Redox Properties Of Transition Metal Hydroxides Is The Best Candidate Electrode Material. In This Study, Mil-53(Fe)/??-Ni(Oh)2 Nano composites Were Synthesized Through The Sonochemical Wet Impregnation Assisted Method In The Ratio Of (10, 20, 30% Of Ni(Oh)2), And Their Names Are Assigned As M-Ni1, M-Ni2, And M-Ni3 Respectively. Characterization Techniques Such As X-Ray Diffraction, Brunauer, Emmett, And Teller, Scanning Electron Microscopy, Fourier Transform Infrared Spectroscopy, Cyclic Voltammetry, Galvan static Charge-Discharge, And Electrochemical Impedance Spectroscopy Were Used. The Effect Of Varying The Ni(Oh)2 Concentration On The Electro-Performance Of The Composite Has Been Exploited. Among The Investigated Concentrations, 20% Ni(Oh)2 Impregnated Mil-53(Fe)Which Is An Iron-Based Metal-Organic Framework With Terephthalic Acid As An Organic Linker Exhibited The Highest Areal Capacitance Of 2.2f/Cm2 At 1 Ma/Cm2 Current Density And 99.2% Of Capacitance Retention In An Aqueous Na2so4 Electrolyte. This Superior Performance Is Attributed To The Optimal Encapsulation Of Ni(Oh)2, Which Enhances The Active Surface Area And Leverages The Synergistically With Other Components, Improving Overall Performance Through Mechanisms Like Facilitated Ion Transport Effect Between ??-Ni(Oh)2 And The Mof Work.