Effect of Annealing Temperature on Electrodeposited Iron Oxide Thin Films for Supercapacitor Study
DOI:
https://doi.org/10.32628/IJSRST25125504Keywords:
Iron oxide (Fe2O3), porous, Electrodeposition, Energy and powerAbstract
Fe2O3 samples were electrodeposited onto stainless steel at 1.4 V optimum potential using a 0.2 M FeCl3 precursor solution. They were then annealed at various annealing temperatures between 673 and 723 K with 50° increments. XRD analysis verifies that a crystalline rhombohedral crystal structure has formed. A consistent porous, spongy, beautiful gold flower-like morphology is demonstrated by the FESEM and HRTEM morphologies, and wettability tests indicate its hydrophilic nature. The 1 M KOH electrolyte was used for all electrochemical characterizations of the electrodes as they were deposited. The maximal specific capacitance of the optimized electrode is 898.52 Fg-1 at 2 mVs-1 . Using the galvanostatic charge-discharge technique, the highest values of specific energy (SE), specific power (SP), and columbic efficiency (ɳ) were determined to be 45.88 WhKg-1 , 5.33 KWKg-1 , and 97.67%,respectively. According to EIS investigations, the internal resistance was 0.7869 Ώ.
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