Synthetic Biopigment Supercapacitors

Area of Science:

• Materials Science
• Electrochemistry
• Biomaterials

Background:

• Biomass-derived carbons are promising for sustainable energy storage.
• Heteroatom-doped carbons are key for advanced supercapacitor electrodes.
• Natural polymers offer a renewable source for these materials.

Purpose of the Study:

• To develop a facile method for creating synthetic pheomelanin nanoparticles.
• To engineer controllable size and sulfur content in these nanoparticles.
• To evaluate their potential as electrode materials for supercapacitors.

Main Methods:

• One-pot copolymerization of dopamine and cysteine to synthesize pheomelanin nanoparticles.
• Controlled thermal transformation of nanoparticles into S,N-codoped carbon spheres.
• Electrochemical characterization of the carbonized materials for supercapacitor performance.

Main Results:

• Monodispersed S,N-codoped carbon spheres were fabricated with preserved morphology.
• Synthetic pheomelanin-derived carbons exhibited enhanced thermal stability.
• The materials showed lower charge-transfer resistance and higher specific capacitance (243 F g⁻¹ at 1 A g⁻¹) compared to polydopamine-based carbons.

Conclusions:

• Synthetic biopigment materials offer a novel route to advanced energy storage electrodes.
• Pheomelanin-derived carbons present a sustainable and high-performance alternative.
• This approach inspires further development of energy storage materials from synthetic biopigments.