The Digester

Micrometre-scale Sn anodes paired with single-walled carbon nanotube networks deliver ampere-hour sodium-ion pouch cells that fast-charge in about 15 minutes, cycle 600 times and show better low-temperature performance than LiFePO4/graphite cells.

Micrometre-scale Sn anodes achieve a volumetric energy density of 453 Wh per litre in ampere-hour pouch cells.
Cells sustain fast charging of roughly 15 minutes and retain performance over 600 cycles.
The Sn-based cells outperform LiFePO4/graphite reference cells at low temperatures.
Stability is enabled by continuous topological evolution of Sn particles reinforced by cross-linked single-walled carbon nanotube networks that maintain electrical contact.
Multiscale characterization and machine learning analyses link the electrode structure to cycling stability and suggest the approach is scalable for practical sodium-ion batteries.

Tin anode enables 15-minute fast-charging sodium-ion pouch cells with 453 Wh L−1

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