Silicon-Based Anode Materials for Lithium-Ion Batteries

Silicon has emerged as a leading candidate to replace or augment graphite anodes in lithium-ion batteries owing to its exceptionally high theoretical capacity, which is nearly ten times that of graphite. Its adoption is challenged by drastic volume changes during lithiation and delithiation—often in excess of 300%—leading to particle fracture, unstable solid electrolyte interphase (SEI) formation and rapid capacity fading. To overcome these issues, researchers have explored nanostructuring approaches—such as porous networks, hollow or yolk–shell architectures and two-dimensional encapsulation—to accommodate expansion and preserve structural integrity. Composite strategies pairing silicon with conductive carbonaceous matrices (graphene, carbon nanotubes or pyrolysed carbon) enhance electronic pathways and mechanical resilience. Surface engineering, including artificial SEI layers and ionic-liquid electrolytes, has improved interfacial stability. Prelithiation methods and advanced polymeric binders further mitigate initial capacity loss and maintain electrode cohesion. Recent efforts emphasise scalable synthesis routes and integration into full-cell formats, advancing silicon-based anodes from laboratory prototypes towards practical high-energy, fast-charging applications in electric vehicles, grid storage and portable electronics.

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Silicon-Based Anode Materials for Lithium-Ion Batteries publication trend

The graph below shows the total number of articles in silicon-based anode materials for lithium-ion batteries across all publications each year (not limited to Nature Index journals).

Technical terms

Gravimetric capacity: Charge stored per unit mass of electrode material.

Volumetric energy density: Energy stored per unit volume of electrode or complete cell.

Solid electrolyte interphase (SEI): Passivation film forming on anode surfaces that governs stability and ion transport.

Prelithiation: Process of adding lithium to an electrode prior to initial cycling to offset active-lithium losses.

Coulombic efficiency: Ratio of discharge capacity to charge capacity, indicating cycle-to-cycle reversibility.

Nanostructuring: Designing and engineering materials at the nanometre scale to tailor mechanical and electrochemical properties.

References

1. Innovative Solutions for High-Performance Silicon Anodes in Lithium-Ion Batteries: Overcoming Challenges and Real-World Applications. Nano-Micro Letters (2024).
2. Si-Based Anode Materials for Li-Ion Batteries: A Mini Review. Nano-Micro Letters (2014).
3. Scalable synthesis of ant-nest-like bulk porous silicon for high-performance lithium-ion battery anodes. Nature Communications (2019).
4. Stable high-capacity and high-rate silicon-based lithium battery anodes upon two-dimensional covalent encapsulation. Nature Communications (2020).
5. The critical role of carbon in marrying silicon and graphite anodes for high‐energy lithium‐ion batteries. Carbon Energy (2019).
6. Stable silicon-ionic liquid interface for next-generation lithium-ion batteries. Nature Communications (2015).
7. Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges. Batteries (2018).
8. Fast-charging high-energy lithium-ion batteries via implantation of amorphous silicon nanolayer in edge-plane activated graphite anodes. Nature Communications (2017).
9. Production of high-energy Li-ion batteries comprising silicon-containing anodes and insertion-type cathodes. Nature Communications (2021).