Interfacial‐Catalysis‐Enabled Layered and Inorganic‐Rich SEI on Hard Carbon Anodes in Ester Electrolytes for Sodium‐Ion Batteries

Abstract Constructing a homogenous and inorganic‐rich solid electrolyte interface (SEI) can efficiently improve the overall sodium‐storage performance of hard carbon (HC) anodes. However, the thick and heterogenous SEI derived from conventional ester electrolytes fails to meet the above requirements. Herein, an innovative interfacial catalysis mechanism is proposed to design a favorable SEI in ester electrolytes by reconstructing the surface functionality of HC, of which abundant CO (carbonyl) bonds are accurately and homogenously implanted. The CO (carbonyl) bonds act as active centers that controllably catalyze the preferential reduction of salts and directionally guide SEI growth to form a homogenous,…

• NN
  National Natural Science Foundation of China

  Awards: 22005033, 21975026
• BI
  Beijing Institute of Technology Research Fund Program for Young Scholars

  Award: XSQD‐202108005