Carbon Materials Characterization and Applications

Carbon materials encompass a diverse family of allotropes and composites, from graphitic and glassy carbons to activated and functionalised forms. Characterisation techniques such as X-ray diffraction, Raman spectroscopy and transmission electron microscopy reveal the arrangement of sp²-bonded networks, the size and curvature of graphene fragments, and the distribution of defects or pores. Such structural insights inform applications in energy storage, catalysis, sensing and micro-/nanomanufacturing. For example, highly crystalline graphite derived from organic precursors serves as a high-performance anode material in lithium-ion batteries, while glassy carbon microstructures find use in robust microelectromechanical devices. Activation processes produce high-surface-area carbons for adsorption and catalysis, and tailored functionalisation of carbon surfaces enables precise control over chemical reactivity and interfacial properties. The interplay between synthesis parameters, microstructure and macroscopic performance underpins the global drive to design carbon materials with targeted properties for sustainable technologies.

Research from Nature Portfolio

Recent studies have employed in situ high-resolution transmission electron microscopy to track the evolution of glassy carbon during pyrolysis. By heating polymer precursors under inert atmosphere and imaging at elevated temperatures, researchers have visualised the gradual assembly, curvature and rearrangement of graphene‐rich fragments, revealing critical intermediate stages that determine final microstructure and mechanical performance. Another advance demonstrates a catalyst-free route to convert non-graphitising carbons into highly crystalline graphite. Through repeated pulsed high-temperature treatment of organic precursors, this method yields over 90 per cent crystalline graphite, as confirmed by Raman spectroscopy, X-ray diffraction and electron microscopy. The approach offers a general pathway to produce defect-low graphite from diverse biomass or polymer feedstocks without metal contamination, with potential impact on battery and graphene production.

Carbon Materials Characterization and Applications publication trend

The graph below shows the total number of articles in carbon materials characterization and applications across all publications each year (not limited to Nature Index journals).

Technical terms

Graphenic crystallite: A nanoscale domain of regularly arranged hexagonal carbon rings within a disordered carbon matrix, responsible for graphitic ordering.

Pyrolysis: Thermal decomposition of organic precursors at elevated temperatures under inert atmosphere, yielding carbonaceous materials with distinct microstructures.

X-ray diffraction (XRD): A non-destructive technique that probes the crystalline structure of materials by measuring diffraction patterns of X-rays interacting with atomic planes.

Functionalization: The deliberate introduction of chemical groups onto a carbon surface to modify its reactivity, electronic properties or interfacial behaviour.

References

1. Defining graphenic crystallites in disordered carbon: Moving beyond the platelet model. Carbon (2023).
2. Analysis of Activation Process of Carbon Black Based on Structural Parameters Obtained by XRD Analysis. Crystals (2021).
3. Glassy Carbon: A Promising Material for Micro- and Nanomanufacturing. Materials (2018).
4. Evolution of Glassy Carbon Microstructure: In Situ Transmission Electron Microscopy of the Pyrolysis Process. Scientific Reports (2018).
5. The Role of Functionalization in the Applications of Carbon Materials: An Overview. C – Journal of Carbon Research (2019).
6. Catalysis-free transformation of non-graphitising carbons into highly crystalline graphite. Communications Materials (2020).