Achieving Ultrahigh Initial Coulombic Efficiency in SnBi/C Anode for Sodium-Ion Batteries via Interfacial Engineering and Binder Optimization

Key Points

• The aim is to achieve ultrahigh initial coulombic efficiency in sodium-ion batteries using a SnBi/C anode.
• Developed a Sn-Bi bimetallic carbon composite
• Implemented interfacial engineering techniques
• Optimized poly(ethylene oxide) binder for anode fabrication
• The SnBi/C anode shows significant alleviation of volume deformation during sodium (de)intercalation
• Achieved superior initial coulombic efficiency compared to traditional anodes