Hierarchically Graphitic Carbon Structure Derived from Metal Ions Impregnated Harmful Inedible Seaweed as...

Area of Science:

• Materials Science
• Environmental Science
• Electrochemistry

Background:

• Inedible seaweed biomass, particularly from summer harvests due to high cellulose content, poses an environmental challenge.
• Developing sustainable materials for energy storage is crucial for technological advancement and environmental protection.

Purpose of the Study:

• To develop hierarchical graphitic carbon structures (HGCs) from inedible seaweed waste.
• To create efficient electrode materials for energy storage devices from a sustainable source.
• To address marine environmental issues by valorizing seaweed biomass.

Main Methods:

• Seaweed biomass was impregnated with Nickel (Ni) ions.
• The impregnated seaweed underwent annealing to form a highly crystalline carbon structure.
• Etching was performed to create nano-sized pores and increase surface area.

Main Results:

• Hierarchical graphitic carbon structures (HGCs) with a large surface area (806 m²/g) were successfully synthesized.
• The HGCs demonstrated a high capacitance and excellent cycling stability, retaining capacity after 10,000 cycles.
• The porous structure significantly increased the number of electrically active sites.

Conclusions:

• Seaweed waste can be effectively converted into high-performance electrode materials for energy storage.
• This approach offers a sustainable solution for managing marine environmental burdens and advancing energy storage technology.