Electrolyte

High-Energy Sodium-Ion Batteries (Sibs) Using A Na Metal Anode

Electrolyte

High-Energy Sodium-Ion Batteries (Sibs) Using A Na Metal Anode

Sodium metal batteries with ether based electrolyte achieved >90% capacity retention at @ 2C rate Sayahpour et al. developed a full cell utilizing a controlled electroplated sodium metal in ether-based electrolyte that achieved > 90% capacity retention after 500 cycles at 2C. The study focuses on the development of high-energy sodium-ion batteries (SIBs) using a Na metal anode. The application of stack pressure and the chemical composition of the SEI layer are crucial factors in enabling a sodium anode. Higher uniaxial pressure controls the uniformity and thickness of the electroplated Na layer, enabling high initial coulombic efficiencies. Authors report, SEI thickness and its chemical compositions depend strongly on the type of electrolyte, with ether-based electrolyte enabling a thin and dense SEI, while a fluffy and porous SEI is formed in carbonate-based electrolyte. The group achieved a capacity retention of 91.84% after 500 cycles at a current rate of 2C.

Academia | P. 226 Source: Sayahpour B., Li W., Bai, S., Lu, B., Han, B., Chen, Y., Deysher, G., Parab, S., Ridley, P., Raghavendran, G., Nguyen, L.H.B., Zhang, M., & Meng, Y.S.

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