Sodium-Ion Battery Technologies and Applications

Sodium-ion batteries (SIBs) have emerged as leading contenders in the quest for cost-effective and sustainable energy storage. By employing abundant sodium resources rather than scarce lithium, SIBs promise reduced raw-material costs and enhanced supply-chain security. Functionally, they mirror the “rocking-chair” mechanism of lithium-ion systems, with sodium ions shuttling between a positive electrode (cathode) and a negative electrode (anode) through a liquid or solid electrolyte. Recent advances in electrode chemistries—including layered transition-metal oxides, polyanionic frameworks and Prussian blue analogues for cathodes, as well as hard carbon and novel composite materials for anodes—have significantly improved energy density and cyclability. Solid-state electrolytes are also under active development to enhance safety and widen operational temperature ranges. Despite these strides, challenges remain in matching the high voltage and energy density of lithium-based cells, managing larger ionic radii and optimising interfacial stability. Practical applications span low-cost stationary storage, grid balancing and emerging electromobility segments. Pilot projects and early commercialisation efforts highlight the global significance of SIBs in supporting renewable integration and decarbonisation targets, while ongoing research aims to bridge the gap between laboratory performance and industrial scalability.

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Sodium-Ion Battery Technologies and Applications publication trend

The graph below shows the total number of articles in sodium-ion battery technologies and applications across all publications each year (not limited to Nature Index journals).

Technical terms

Sodium-ion battery (SIB): A rechargeable electrochemical device in which sodium ions migrate between electrodes during charge and discharge.

Cathode: The positive electrode material in a battery that hosts sodium ions during discharge.

Anode: The negative electrode material in a battery that hosts sodium ions during charge.

Electrolyte: The ionic conductor—liquid or solid—that provides the medium for ion transport between electrodes.

Energy density: The amount of energy stored per unit mass or volume of a battery.

Cycle life: The number of complete charge–discharge cycles a battery can undergo before capacity degrades below a specified threshold.

Solid-electrolyte interphase (SEI): The passivation layer formed at the electrode–electrolyte interface that influences stability and safety.

References

1. Engineering ion transport in all-solid-state sodium-ion batteries: fundamentals, strategies, and perspectives. Progress in Materials Science (2025).
2. From Li‐Ion Batteries toward Na‐Ion Chemistries: Challenges and Opportunities. Advanced Energy Materials (2020).
3. Recent developments in electrode materials for sodium-ion batteries. Journal of Materials Chemistry A (2015).
4. Exploring the Economic Potential of Sodium-Ion Batteries. Batteries (2019).
5. Optimization Strategies Toward Functional Sodium‐Ion Batteries. Energy & Environmental Materials (2023).
6. Toward Emerging Sodium‐Based Energy Storage Technologies: From Performance to Sustainability. Advanced Energy Materials (2022).
7. Recent Progress of Promising Cathode Candidates for Sodium‐Ion Batteries: Current Issues, Strategy, Challenge, and Prospects. Small Structures (2023).
8. Sodium-Ion Battery: Can It Compete with Li-Ion?. ACS Materials Au (2023).