Ethyl Acetate Vapor Induced Local Ordering in Hard Carbon for Stable Sodium‐Ion Batteries

ABSTRACT Biomass‐derived hard carbon (HC) is a promising anode material for sodium‐ion batteries (SIBs) owing to its high Na + storage capacity. However, the defects and disordered structures cause irreversible Na + storage and side reactions, inducing low initial Coulombic efficiency (ICE) and poor cyclability. Herein, we propose a novel in situ vapor‐phase structural engineering strategy that leverages the synergistic cross‐linking between the defect sites of HC and organic free radicals generated from the decomposition of ethyl acetate, thereby constructing a distinctive locally ordered structure. Mechanistic characterizations based on synchrotron radiation reveal that the modulated locally ordered…

• NN
  National Natural Science Foundation of China

  Award: U22A20439
• NS
  Natural Science Foundation of Guangdong Province

  Award: 2024A1515010346