What question did this study set out to answer?

This research aims to develop stable layered oxide cathodes for sodium-ion batteries that address structural challenges and enhance performance.

Rational Design of Highly Stable Layered Oxide Cathodes for Na‐ion Batteries

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Randomized trial evaluates cathode performance in sodium-ion batteries, suggesting a novel design improves stability and capacity.

This research aims to develop stable layered oxide cathodes for sodium-ion batteries that address structural challenges and enhance performance.
Proposed a high-entropy transition metal site design to mitigate structural breakage.
Integrated interlayered calcium substitution to reduce sodium-ion precipitation.
Evaluated the electrochemical performance over 600 cycles at 2 C and extreme temperature conditions.
Achieved 81.0% capacity retention after 600 cycles at 2 C.
Demonstrated 95.1% capacity retention after 700 cycles at 25°C in an ultra-high-capacity 20 Ah pouch cell.
Showed 86.1% of 25°C capacity at −20°C.

Cai et al. (2026) studied this question.

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