Electrochemical Energy Storage Using Carbon-Based Materials

Electrochemical energy storage employing carbon-based materials encompasses a range of technologies from electrical double-layer capacitors to hybrid batteries. Carbon allotropes such as graphene, carbon nanotubes and activated carbons provide high electrical conductivity, large accessible surface areas and tunable porosity, enabling rapid ion transport and high power densities. Surface functionalisation and heteroatom doping further introduce pseudocapacitive behaviour, enhancing energy density without compromising cycle life. Nanostructuring strategies—ranging from zero- to three-dimensional architectures—allow optimisation of charge‐transfer kinetics and ion diffusion paths. These features render carbon-based electrodes indispensable for applications spanning portable electronics, electric vehicles and grid stabilisation, where reliability, fast charge–discharge capability and long-term stability are paramount.

Research from Nature Portfolio

Researchers have demonstrated non-porous carbon microspheres co-doped with fluorine and nitrogen, synthesised via a low-temperature solvothermal process, that achieve ultrahigh volumetric capacitance exceeding 500 F cm⁻³ in aqueous media while retaining full capacitance after tens of thousands of cycles. This approach highlights the potential to rival metal-oxide electrodes at high mass loading and fast charge rates. In parallel, block copolymer microphase separation has enabled the fabrication of porous carbon fibres with uniform mesopores (~12 nm) partially filled by ultrathin pseudocapacitive MnO₂ layers. At loadings near 7 mg cm⁻², these composite fibres deliver gravimetric capacitances over 1,000 F g⁻¹ and areal capacitances above 3,000 mF cm⁻², exemplifying how precise pore engineering can reconcile high mass loading with rapid ion and electron transport.

Electrochemical Energy Storage Using Carbon-Based Materials publication trend

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

Technical terms

Electrical double-layer capacitance (EDLC): charge storage mechanism relying on ion adsorption at the electrode–electrolyte interface without faradaic reactions.

Pseudocapacitance: faradaic charge storage arising from reversible redox reactions at or near the electrode surface, contributing to enhanced capacitance.

Specific capacitance: capacitance normalised to electrode mass (F g⁻¹) or volume (F cm⁻³), indicating energy storage capacity per unit.

Heteroatom doping: incorporation of non-carbon elements into a carbon framework to tailor electronic conductivity, surface chemistry and pseudocapacitive behaviour.

Mesoporous structure: porous architecture with pore diameters between 2 and 50 nm, offering a balance between accessible surface area and efficient ion transport.

References

1. Ultrahigh volumetric capacitance and cyclic stability of fluorine and nitrogen co-doped carbon microspheres. Nature Communications (2015).
2. Block copolymer derived uniform mesopores enable ultrafast electron and ion transport at high mass loadings. Nature Communications (2019).
3. An insight into the nanoarchitecture of electrode materials on the performance of supercapacitors. Coordination Chemistry Reviews (2024).
4. Carbon nanomaterials and their composites for supercapacitors. Carbon Energy (2022).
5. Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors. Advanced Energy Materials (2020).