Anode Materials for Metal-Ion Batteries

Metal-ion batteries have become central to modern energy storage, powering devices from portable electronics to electric vehicles and stabilising renewable energy grids. The anode, as the negative electrode during discharge, critically influences capacity, rate performance, cycle life and safety. Traditional graphite anodes operate by reversible lithium intercalation but are limited by moderate capacity and slow kinetics with larger ions. Silicon and other alloying materials offer very high capacities through Li_xSi formation but face severe volume changes and rapid degradation. Conversion-type oxides and phosphides deliver high specific capacities yet often suffer voltage hysteresis and low conductivity. Two-dimensional materials, such as transition metal dichalcogenides, MXenes and novel boron or carbon-based monolayers, present opportunities to tailor surface area, electronic conductivity and strain tolerance. Emerging research also explores sodium-, potassium- and multivalent-ion chemistries, leveraging earth-abundant metals and new electrode architectures to meet the demands of high-energy, sustainable storage solutions worldwide.

Research from Nature Portfolio

Recent studies have demonstrated that engineering defects in monolayer molybdenum disulfide dramatically enhances lithium adsorption without compromising ion mobility. First-principles calculations reveal that atom vacancies and grain boundaries create stronger binding sites, increasing adsorption energies to the range of 2.8–3.8 eV while maintaining diffusion barriers below 0.5 eV. This balance of high capacity and facile transport highlights defect-mediated MoS₂ as a promising anode for high-rate lithium-ion batteries.

Another line of enquiry has applied tensile strain to two-dimensional MoS₂ to tailor its electronic structure for both lithium and sodium storage. A modest in-plane stretch of around 6 % upshifts metal d states towards the Fermi level, boosting Li/Na adsorption energies by over 70 % and reducing diffusion barriers to approximately 0.1–0.2 eV. Strain-induced narrowing of the band gap further enhances conductivity, offering a tunable route to high-performance intercalation anodes.

Anode Materials for Metal-Ion Batteries publication trend

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

Technical terms

Anode: The negative electrode in a battery where oxidation of the active material occurs during discharge.

Intercalation: The reversible insertion of ions into the layered structure of a host material without major structural change.

Diffusion barrier: The energy threshold that migrating ions must overcome to move between sites in an electrode.

MXene: A family of two-dimensional transition metal carbides or nitrides characterised by high conductivity and surface tunability.

Specific capacity: The amount of charge a material can store per unit mass, expressed in milliampere-hours per gram (mAh g⁻¹).

Open-circuit voltage: The equilibrium voltage of a battery electrode measured under no-load conditions.

References

1. Beyond Graphene Anode Materials for Emerging Metal Ion Batteries and Supercapacitors. Nano-Micro Letters (2018).
2. Defect-Mediated Lithium Adsorption and Diffusion on Monolayer Molybdenum Disulfide. Scientific Reports (2015).
3. Strain-engineered two-dimensional MoS2 as anode material for performance enhancement of Li/Na-ion batteries. Scientific Reports (2018).
4. Flexible C6BN Monolayers As Promising Anode Materials for High-Performance K‑Ion Batteries. ACS Applied Materials & Interfaces (2020).
5. Thermodynamics and kinetics of 2D g-GeC monolayer as an anode materials for Li/Na-ion batteries. Journal of Power Sources (2021).
6. Vanadium Carbide (V4C3) MXene as an Efficient Anode for Li-Ion and Na-Ion Batteries. Nanomaterials (2022).