Resolving the Origins of Superior Cycling Performance of Antimony Anode in Sodium‐ion Batteries: A Comparison with Lithium‐ion Batteries

(0.76 Å), it was generally believed that the Sb anode would experience even worse capacity degradation in SIBs due to more substantial volumetric variations during cycling when compared to LIBs. However, the Sb anode in SIBs unexpectedly exhibited both better electrochemical and structural stability than in LIBs, and the mechanistic reasons that underlie this performance discrepancy remain undiscovered. Here, using substantial in situ transmission electron microscopy, X-ray diffraction, and Raman techniques complemented by theoretical simulations, we explicitly reveal that compared to the lithiation/delithiation process, sodiation/desodiation process of Sb anode displays a previously unexplored two-stage…

• NN
  National Natural Science Foundation of China

  Awards: 52072323, 21975154, 52122211, 22179078, 21975025