Green Synthesis of CuO/TiO2 Composite for Hybrid Supercapacitor Application

Abstract

In recent years, supercapacitors have gained significant attention due to their high power density, long cycle life, and ability to bridge the power/energy gap between traditional capacitors and batteries. Composite electrode materials have shown exceptional electrochemical properties, leading to the development of high-performance supercapacitors. This study introduces a green synthesis method for titanium oxide (TiO2) and copper oxide (CuO), along with their binary composites, CuO/TiO2, in varying weight ratios for potential supercapacitor applications. The synthesis process utilized Stephania abyssinica (S. abyssinica) plant extract as a natural reducing and capping agent. The synthesized materials were characterized their structural, morphological, thermal, surface properties, and functional groups using various techniques. This included X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric/differential thermal analysis (TGA/DTA), Brunauer-Emmett-Teller (BET) surface area analysis, and Fourier-transform infrared spectroscopy (FTIR). Electrochemical properties were assessed through cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The results indicated that the green-synthesized TiO2, CuO, and CuO/TiO2 composite exhibit hybrid-type supercapacitive behavior. Among the composites, the CuO/TiO2 with a 70:30 weight ratio (TC3) demonstrated the highest specific capacitance (593.8 Fg-1), enhanced surface area (102.84 m2g-1), and superior cycling stability (98.7% after 2500 cycles), surpassing the individual metal oxide electrodes. These findings suggest that the CuO/TiO2 (TC3) composite is a promising candidate for environmentally friendly and efficient supercapacitor electrode applications.

In Recent Years, Supercapacitors Have Gained Significant Attention Due To Their High Power Density, Long Cycle Life, And Ability To Bridge The Power/Energy Gap Between Traditional Capacitors And Batteries. Composite Electrode Materials Have Shown Exceptional Electrochemical Properties, Leading To The Development Of High-Performance Supercapacitors. This Study Introduces A Green Synthesis Method For Titanium Oxide (Tio2) And Copper Oxide (Cuo), Along With Their Binary Composites, Cuo/Tio2, In Varying Weight Ratios For Potential Supercapacitor Applications. The Synthesis Process Utilized Stephania Abyssinica (S. Abyssinica) Plant Extract As A Natural Reducing And Capping Agent. The Synthesized Materials Were Characterized Their Structural, Morphological, Thermal, Surface Properties, And Functional Groups Using Various Techniques. This Included X-Ray Diffraction (Xrd), Scanning Electron Microscopy (Sem), Thermogravimetric/Differential Thermal Analysis (Tga/Dta), Brunauer-Emmett-Teller (Bet) Surface Area Analysis, And Fourier-Transform Infrared Spectroscopy (Ftir). Electrochemical Properties Were Assessed Through Cyclic Voltammetry (Cv), Galvanostatic Charge-Discharge (Gcd), And Electrochemical Impedance Spectroscopy (Eis). The Results Indicated That The Green-Synthesized Tio2, Cuo, And Cuo/Tio2 Composite Exhibit Hybrid-Type Supercapacitive Behavior. Among The Composites, The Cuo/Tio2 With A 70:30 Weight Ratio (Tc3) Demonstrated The Highest Specific Capacitance (593.8 Fg-1), Enhanced Surface Area (102.84 M2g-1), And Superior Cycling Stability (98.7% After 2500 Cycles), Surpassing The Individual Metal Oxide Electrodes. These Findings Suggest That The Cuo/Tio2 (Tc3) Composite Is A Promising Candidate For Environmentally Friendly And Efficient Supercapacitor Electrode Applications.