Researchers Developed New Sodium-Ion Battery Cathode
A novel high-entropy layered-oxide cathode shows significant longevity and stability in tests.
Updated on Sept. 22, 2026 in Energy
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Researchers have developed a high-entropy layered-oxide cathode for sodium-ion batteries, according to findings published on September 22, 2026. The new cathode material demonstrates impressive durability by maintaining 90 per cent of its capacity after 2,300 cycles.
Why it matters
Sodium-ion batteries typically suffer from structural degradation due to repeated phase transitions between crystal structures. This new cathode design mitigates these issues, offering a potential path toward longer-lasting energy storage solutions.
The tested cells achieved an energy density of 162.5 Wh/kg at a 0.1C rate. Additionally, the pouch cells retained 97.7 per cent of their capacity during high-stress testing involving a 5C charge and 1C discharge cycle.
The players
Eastern Institute for Advanced Study
This research institution is based in Ningbo and served as a primary site for the development of the new cathode material.
Hong Kong Polytechnic University
This academic institution collaborated on the battery research project from its base in Hong Kong.
Chinese Academy of Sciences
This national research organization contributed to the interdisciplinary study of the layered-oxide cathode chemistry.
The details
By utilizing configurational entropy, researchers successfully modified cathode lattice behavior to regulate ion diffusion and phase transitions. This engineering approach stabilizes the material against the structural decay that often limits the cycle life of layered-oxide battery chemistries.
Timeline
September 22, 2026: The research findings were formally published.
The Big Picture
This development represents a departure from traditional cathode limitations by specifically addressing the lattice instability inherent in sodium-ion battery layered-oxide cathodes. The successful application of entropy-engineering provides a new framework for future research in battery material science.
This breakthrough could lead to more durable and affordable battery storage systems for renewable energy grids. Long-term commercialization of this technology may eventually lower costs for energy storage devices by reducing reliance on scarce battery materials.
The takeaway
Entropy-engineered cathodes may solve the structural degradation problems that currently limit sodium-ion battery lifespans. Continued scaling efforts will determine if these lab results translate to mass-produced energy storage hardware.
Further reading
For more information on the latest breakthroughs in sustainable power, explore the Energy section.
Live Poll
Would you prefer using devices powered by cheaper, more abundant sodium-ion batteries over lithium-ion?
