Electrochemical Properties of Carbon Nanostructures

Carbon nanostructures encompass a diverse family of materials—including fullerenes, carbon nano-onions, graphene derivatives, carbon nanotubes and carbon nanofibres—whose electrochemical performance derives from their high electrical conductivity, tunable surface area and controllable porosity. The curvature and defect density in multi-shell fullerenes influence electron distribution and redox activity, while the two-dimensional lattice of graphene affords rapid ion transport and a large electrochemical double-layer capacitance. Surface functionalisation and heteroatom doping further modulate charge storage by introducing pseudocapacitive sites and altering the local electronic structure, thereby closing the HOMO–LUMO gap and enhancing electron transfer kinetics. These combined attributes render carbon nanostructures exceptionally versatile for applications in supercapacitors, rechargeable batteries, electrocatalysis and sensing. Emerging trends include hybrid architectures—such as carbon nano-onion/metal oxide composites and doped graphitic frameworks—that balance high power density, long cycle life and structural stability under repeated redox cycling. The global pursuit of sustainable energy storage drives ongoing efforts to optimise these materials via scalable synthesis, precise defect engineering and hierarchical porosity control.

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Electrochemical Properties of Carbon Nanostructures publication trend

The graph below shows the total number of articles in electrochemical properties of carbon nanostructures across all publications each year (not limited to Nature Index journals).

Technical terms

Carbon nano-onions: Multi-shell, concentric fullerenes with curved graphitic layers that provide a high surface area and tunable electronic properties.

HOMO–LUMO gap: The energy difference between the highest occupied and lowest unoccupied molecular orbitals, governing electronic excitation and conductivity.

Pseudocapacitance: Charge storage arising from fast, reversible redox reactions at or near the electrode surface, augmenting double-layer capacitance.

Doping: Introduction of heteroatoms (e.g., nitrogen, phosphorus) into the carbon lattice to tailor electrical conductivity and create redox-active sites.

Electrochemical double-layer capacitance: Charge accumulation at the electrode–electrolyte interface, proportional to accessible surface area and ion adsorption.

References

1. Origin of metallic-like behavior in disordered carbon nano-onions. Carbon (2023).
2. Nitrogen–phosphorus doped graphitic nano onion-like structures: experimental and theoretical studies. RSC Advances (2021).
3. Carbon Nano-onions: Potassium Intercalation and Reductive Covalent Functionalization. Journal of the American Chemical Society (2021).