Electrochemical Properties of Graphene-Based Materials

Graphene-based materials, comprising single to few atomic layers of sp2-bonded carbon, exhibit unique electrochemical characteristics arising from their two-dimensional geometry, high conductivity and tunable surface chemistry. The distribution of edge-plane sites versus basal-plane regions governs heterogeneous electron transfer kinetics, with defect-rich or multilayer assemblies typically offering faster charge exchange than pristine monolayers. High specific surface area and low intrinsic capacitance enable rapid capacitive response and sensitive detection of redox species, while chemical functionalisation or reduction of graphene oxide introduces oxygenated moieties that can catalyse electron transfer or modulate surface wettability. These attributes underpin applications in energy storage, where graphene-based electrodes deliver high power density and cycle stability, and in electrochemical sensing, where low detection limits and fast response times are essential. Integration into composites or van der Waals heterostructures further allows precise control of interlayer charge transport and double-layer capacitance, paving the way for tailored performance in batteries, supercapacitors and bioelectrochemical devices.

Research from Nature Portfolio

Recent studies have demonstrated that mechanical and electrohydrodynamic alignment of polymer precursors prior to pyrolysis can yield uniformly graphitised carbons with abundant electroactive edge planes. By applying electrospinning forces and controlled tension during crosslinking, the resulting material exhibits enhanced molecular alignment and graphitic ordering after thermal treatment. The final carbon framework shows a high density of edge-plane exposure, translating into accelerated electron transfer kinetics and reduced overpotentials in redox reactions. This work highlights the critical influence of physical synthesis parameters on the ultimate electrochemical performance of graphene-derived materials.

Electrochemical Properties of Graphene-Based Materials publication trend

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

Technical terms

Graphene: A single layer of sp2-hybridised carbon atoms arranged in a hexagonal lattice, prized for its electrical conductivity and surface area.

Reduced graphene oxide (rGO): Graphene oxide that has undergone chemical, thermal or electrochemical treatment to restore sp2 character while retaining some oxygen functional groups.

Basal plane: The flat surface of a graphene sheet, characterised by delocalised π-electrons and low density of reactive sites.

Edge plane: The periphery of a graphene sheet where carbon bonds terminate, offering high density of defect or functional sites for electron transfer.

Heterogeneous electron transfer (HET): The process by which electrons cross the interface between an electrode surface and a redox species in solution.

Electric double-layer capacitance: The charge stored at the interface between an electrode and electrolyte, arising from separation of ionic charges and image charges on the surface.

Van der Waals heterostructure: A stack of two-dimensional materials held together by weak interlayer forces, allowing tailored electronic and electrochemical properties.

References

1. Electrochemistry at the Edge of a van der Waals Heterostructure. Small (2023).
2. Low-cost, facile droplet modification of screen-printed arrays for internally validated electrochemical detection of serum procalcitonin. Biosensors and Bioelectronics (2023).
3. An overview of recent applications of reduced graphene oxide as a basis of electroanalytical sensing platforms. Applied Materials Today (2018).
4. From two-dimensional materials to their heterostructures: An electrochemist's perspective. Applied Materials Today (2017).
5. Electron Transfer Kinetics on Mono- and Multilayer Graphene. ACS Nano (2014).
6. Graphene oxide electrochemistry: the electrochemistry of graphene oxide modified electrodes reveals coverage dependent beneficial electrocatalysis. Royal Society Open Science (2017).
7. Graphitizing Non-graphitizable Carbons by Stress-induced Routes. Scientific Reports (2017).