Low-Temperature Sodium-Ion Battery Technologies
Summary
Sodium-ion batteries (SIBs) have emerged as promising alternatives to lithium-ion systems for large-scale and extreme-environment energy storage, owing to the earth’s abundant sodium reserves and the potential for lower material costs. However, sub-zero operation poses significant challenges: electrolyte viscosity increases sharply at low temperatures, slowing sodium-ion transport; the formation and evolution of the solid electrolyte interphase (SEI) becomes unpredictable, leading to capacity fade; and mechanical stresses at electrode–current collector interfaces can compromise cell integrity. To address these barriers, researchers have explored multiple strategies. Electrolyte engineering—through mixed solvents, low-viscosity ionic liquids, and functional additives—aims to preserve ionic conductivity and SEI stability below –20 °C. On the electrode side, novel cathode frameworks such as polyanionic compounds and Prussian blue analogues offer robust structural stability and fast diffusion channels for Na+, while advanced anode materials, including hard carbon and titanium-based phosphates, maintain intercalation kinetics at low temperature. Combined with tailored electrode architectures and optimized full-cell configurations, these advances are steadily improving cycle life, rate capability and safety. The deployment of low-temperature SIBs could enable reliable power supplies for polar research stations, aerospace instrumentation and grid-scale storage in cold climates, reinforcing global energy resilience.
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Low-Temperature Sodium-Ion Battery Technologies publication trend
The graph below shows the total number of articles in low-temperature sodium-ion battery technologies across all publications each year (not limited to Nature Index journals).
Technical terms
Solid electrolyte interphase (SEI): a passivation layer that forms at the electrode–electrolyte interface, governing ion transport and long-term cell stability.
Ionic conductivity: a measure of an electrolyte’s ability to facilitate the movement of ions under an applied electric field, critical for low-temperature performance.
Hard carbon: a form of non-graphitising carbon widely used as an anode material in sodium-ion batteries, valued for its structural defects that enhance Na+ storage.
Polyanionic cathode: a class of cathode materials based on phosphate or sulfate frameworks, offering stable voltage and durable crystallinity in harsh environments.
References
- Low‐temperature performance of Na‐ion batteries. Carbon Energy (2024).
- High‐power and low‐cost sodium‐ion batteries with a wide operation temperature from −70 °C to 130 °C. SmartMat (2023).
- Sodium-Ion Battery at Low Temperature: Challenges and Strategies. Nanomaterials (2024).
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