Carbon Nanotube Applications in Lithium-Ion Battery Anodes

Carbon nanotubes (CNTs) have emerged as a leading class of nanostructured materials for anode design in lithium-ion batteries. Their one-dimensional architecture, exceptional electrical conductivity and mechanical strength facilitate rapid electron transport and accommodate volumetric changes during cycling. CNT-based anodes demonstrate higher specific capacity than conventional graphite owing to additional lithium storage at defect sites, inter-wall galleries and open ends. Moreover, hybridisation with conductive polymers, nanocellulose or silicon composites enhances the electrode integrity and cycle stability. Free-standing CNT electrodes eliminate the need for metallic current collectors and binders, increasing gravimetric energy density and enabling flexible form factors suitable for micro-batteries and wearable electronics. Ongoing efforts focus on controlling CNT morphology—such as length, diameter and wall number—to optimise lithium-ion diffusion pathways and minimise irreversible capacity loss in the first cycle. Surface functionalisation and pre-lithiation strategies have been developed to boost initial coulombic efficiency, while three-dimensional CNT frameworks offer scaffolds for high-capacity active materials. These advances pave the way for next-generation portable power sources, electric vehicles and grid-scale storage by balancing high energy density, mechanical robustness and long-term cycling performance.

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Carbon Nanotube Applications in Lithium-Ion Battery Anodes publication trend

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Technical terms

Carbon nanotube (CNT): Cylindrical nanostructures composed of rolled graphene sheets with high electrical conductivity and mechanical strength.

Intercalation: Reversible insertion of lithium ions into the layered or porous structure of the electrode material during battery operation.

Coulombic efficiency: Ratio of the total charge extracted during discharge to the charge supplied during charge, indicating cycle reversibility.

Reversible capacity: Amount of charge per mass unit that can be stored and released repeatedly without significant loss.

Current collector: Conductive substrate that collects and transports electrons between the electrode and external circuit.

References

1. Applications of Carbon Nanotubes for Lithium Ion Battery Anodes. Materials (2013).
2. Direct Pre-lithiation of Electropolymerized Carbon Nanotubes for Enhanced Cycling Performance of Flexible Li-Ion Micro-Batteries. Polymers (2020).
3. Tailoring of Aqueous-Based Carbon Nanotube–Nanocellulose Films as Self-Standing Flexible Anodes for Lithium-Ion Storage. Nanomaterials (2019).