Achieving stable and high-rate quasi-solid-state sodium batteries through strengthened P-O covalency and interface modification in Na₃Zr₂Si₂PO₁₂.

ABSTRACT: Solid-state sodium metal batteries have attracted great interest because of their improved safety and abundant Na resources. However, the interfacial resistances and instabilities induced by parasitic reactions, together with Na dendrite issues, result in reduced rate capability and poor cycling stability. Here, we address these challenges by intrinsically inhibiting parasitic interfacial redox reactions through enhanced P-O covalency in Na₃Zr₂Si₂PO₁₂ (NZSP) with Na₂SiF₆ incorporation, wherein the high electronegativity of F strengthens P-O covalency. Additionally, SnF₂ coating provides a sodiophilic surface and stabilizes the NZSP interface, which is essential for effective electrochemical cycling. This integrate

SUBMITTER: Li T 

PROVIDER: S-EPMC12215194 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature