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Updated: Sep 24, 2025
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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
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Pulsed laser deposited CoFe2O4 thin films as supercapacitor electrodes
S M Nikam1, A Sharma2, M Rahaman2
1School of Nanoscience and Technology, Shivaji University Kolhapur Maharashtra - 416004 India.
RSC Advances
|May 6, 2022
Summary
Pulsed laser deposited cobalt ferrite (CoFe2O4) thin films for supercapacitors perform best at room temperature. Room temperature deposition yields higher capacitance, energy density, and excellent cyclic stability for advanced energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Supercapacitors are crucial for energy storage.
- Cobalt ferrite (CoFe2O4) is a promising material for supercapacitor electrodes.
- Pulsed Laser Deposition (PLD) is a technique used for thin film fabrication.
Purpose of the Study:
- To investigate the effect of substrate temperature on CoFe2O4 thin films for supercapacitor electrodes.
- To analyze the structural, morphological, and electrochemical properties of CoFe2O4 films deposited at different temperatures.
- To determine the optimal deposition conditions for enhanced supercapacitor performance.
Main Methods:
- Pulsed Laser Deposition (PLD) was used to fabricate CoFe2O4 thin films at room temperature (RT) and 450 °C.
- X-ray diffractometry and Raman spectroscopy were employed for phase confirmation.
- Atomic force microscopy (AFM) was used to analyze surface topography and smoothness.
- Electrochemical performance was evaluated using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy.
Main Results:
- CoFe2O4 phase formation was confirmed for films deposited at 450 °C.
- Films deposited at room temperature exhibited superior electrochemical performance compared to those deposited at 450 °C.
- Specific capacitances of 777.4 F g-1 (RT) and 258.5 F g-1 (450 °C) were achieved at 0.5 mA cm-2.
- Room temperature deposited films showed excellent power density (3277 W kg-1) and energy density (17 W h kg-1).
- High cyclic stability of up to 125% after 1500 cycles was observed for RT deposited films.
Conclusions:
- Substrate temperature significantly influences the properties and performance of PLD CoFe2O4 thin films for supercapacitors.
- Room temperature deposition is advantageous for achieving high specific capacitance, energy density, and excellent cyclic stability.
- The findings suggest that RT-deposited CoFe2O4 films are highly suitable for advanced supercapacitor applications.
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