What question did this study set out to answer?

This research aims to improve the performance of all-solid-state sodium batteries by developing a stable NaCl interphase.

February 14, 2026Open Access

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

ZFZhanyou FengUniversity of Science and Technology of China LZLiang ZhuChinese Academy of Sciences EQEnbo QINChinese Academy of Sciences

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.

Abstract

A W–Cl co-doping strategy in Na 3 SbS 4 introduces Na + vacancies and forms a NaCl interphase in situ , enabling high ionic conductivity and stable electrolyte–Na metal interfaces for all-solid-state sodium batteries.

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