Designing advanced solid-state sodium batteries (SSBs) demands simultaneously overcoming the low ionic conductivity of solid-state electrolytes (SSEs) and the poor interfacial compatibility between electrodes and SSEs. Herein, a composite solid-state electrolyte (CSE) with high ionic conductivity was prepared by using an efficient UV polymerization in 45 s. A stable interphase and interface were achieved simultaneously through solvent structure tuning and in situ curing. By introduction of fluoroethylene carbonate (FEC) to form a competitive solvation structure in CSE-F, the low lowest unoccupied molecular orbital (LUMO) allowed preferential reduction of FEC in the solvation shell. A dense and uniform NaF-rich interphase was constructed to inhibit the growth of the dendrites. Simultaneously, the integrated cathode and electrolyte constructed a tight-contact interface, enabling uniform and efficient ion transport. The Na||CSE-F@Na₃V₂(PO₄)₃ (NVP) cell showed a capacity retention of 91.78% after 2100 cycles. This work provides a solution to simultaneously achieve a rational interphase and an electrode/electrolyte interface design for SSBs.

中文翻译：

---

超快 UV 固化为固态钠金属电池提供稳定的界面和界面


设计先进的固态钠电池 （SSB） 需要同时克服固态电解质 （SSE） 的低离子电导率以及电极与 SSE 之间界面兼容性差的问题。在此，通过使用高效的紫外聚合在 45 s 内制备了具有高离子电导率的复合固态电解质 （CSE）。通过溶剂结构调整和原位固化，同时实现了稳定的界面和界面。通过在 CSE-F 中引入氟碳酸乙烯酯 （FEC） 形成有竞争力的溶剂化结构，低最低未占据分子轨道 （LUMO） 允许在溶剂化壳中优先还原 FEC。构建一个致密且均匀的富含 NaF 的界面以抑制树突的生长。同时，集成的阴极和电解质构建了一个紧密接触的界面，实现了均匀高效的离子传输。The Na||CSE-F@Na₃V₂（PO₄）₃ （NVP） 电池在 2100 次循环后容量保持率为 91.78%。这项工作提供了一种解决方案，可以同时实现 SSB 的合理界面和电极/电解质界面设计。