NaCl interphase enables stable Na 2.85 Sb 0.95 W 0.05 S 3.9 Cl 0.1 -based all-solid-state sodium batteries

Key Points

• This research aims to improve the performance of all-solid-state sodium batteries by developing a stable NaCl interphase.
• Implemented a W–Cl co-doping strategy in Na3SbS4 to introduce Na+ vacancies.
• Characterized the formation of the NaCl interphase in situ.
• Evaluated the ionic conductivity and stability of the electrolyte-Na metal interfaces.
• Achieved high ionic conductivity due to the formation of Na+ vacancies.
• Established a stable electrolyte-Na metal interface using the NaCl interphase.
• Demonstrated improved performance metrics for sodium battery applications.