Activation of Biomass-Derived Carbon Platelets for EDLC Symmetrical Devices

Area of Science:

• Materials Science
• Electrochemistry
• Renewable Energy

Background:

• Developing sustainable and cost-effective electrode materials is crucial for advanced energy storage devices.
• Biomass-derived carbon materials offer a promising alternative to traditional carbon sources due to their abundance and environmental benefits.

Purpose of the Study:

• To synthesize and characterize bio-activated carbon platelets from tamarind fruit seed shells (TFSs) for supercapacitor applications.
• To evaluate the electrochemical performance of these materials, particularly after KOH activation.

Main Methods:

• Pyrolysis of TFSs at 800 °C under an inert argon atmosphere to produce pure TFS-derived carbon.
• Chemical activation using potassium hydroxide (KOH) to create activated TFS-derived carbon (TFS-AC (KOH)).
• Characterization using surface morphology analysis, Raman spectroscopy, BET surface area analysis, and electrochemical testing (two-electrode system).

Main Results:

• TFS-AC (KOH) exhibited a significantly increased BET surface area (124.72 m²/g) compared to pure TFS-AC (48.54 m²/g).
• The TFS-AC (KOH) electrode delivered a high specific capacitance of 129.03 F/g at 0.5 A/g.
• The activated material demonstrated excellent electrochemical stability, retaining 98.2% of its capacitance over 10,000 cycles.

Conclusions:

• KOH-activated tamarind seed shell-derived carbon nanosheets are effective electrode materials for high-performance supercapacitors.
• The enhanced surface area and electrochemical properties make them suitable for future energy storage applications.
• This study highlights the potential of utilizing agricultural waste for sustainable energy storage solutions.