Synergetic Electronic Spin Modulation and Asymmetric Orbital Hybridization at CoSe 2 /Fe 3 Se 4 Interface Inducing Robust SEI for Enhanced Sodium Ion Storage

Key Points

• This research aims to address the limitations of transition metal selenides in sodium-ion battery applications by investigating a new interface.
• Investigated the CoSe2/Fe3Se4 interface's electronic and structural properties.
• Analyzed the impact of electronic spin modulation and orbital hybridization on sodium ion storage capacity.
• The CoSe2/Fe3Se4 interface exhibited a significant increase in sodium ion storage capacity compared to traditional anodes.
• Improved electrochemical performance was observed, suggesting stable solid electrolyte interphase formation.