All-solid-state sodium batteries are attractive for large-scale energy storage due to their low cost, wide variety of cathode materials and high safety. And sulfide sodium solid electrolytes are key to enable room-temperature all-solid-state sodium batteries. Herein, we report the quaternary nanosized solid electrolyte Na₁₀SnSb₂S₁₂ synthetized through liquid phase process. The crystalline structure and diffusion path of Na₁₀SnSb₂S₁₂ are investigated through the first principles calculations. The Na₁₀SnSb₂S₁₂ electrolyte presents a room temperature conductivity of 0.52 mS cm^-1 at 25 ^oC and a very low activation energy of 0.23 eV as well as excellent air stability by replacing phosphorus with antimony. Moreover, the small particle size of the solid electrolytes enhances the contact between solid electrolyte and electrode, reducing the interfacial contact resistance. Consequently, the TiS₂/Na₁₀SnSb₂S₁₂/Na all-solid-state sodium batteries show excellent cycling stability and exhibit a capacity of 119.6 mAh g^-1 after cycling for 100 cycles at 100 mA g^-1.

全固态钠电池因其成本低，阴极材料种类繁多且安全性高而吸引了大规模的能量存储。硫化钠固体电解质是实现室温全固态钠电池的关键。在此，我们报道通过液相法合成的四级纳米级固体电解质Na ₁₀ SnSb ₂ S ₁₂。通过第一原理计算研究了Na ₁₀ SnSb ₂ S ₁₂的晶体结构和扩散路径。Na ₁₀ SnSb ₂ S ₁₂电解质的室温电导率为0.52 mS cm ^-1在25 ^o C时，活化能非常低，为0.23 eV，并且通过用锑替代磷而具有出色的空气稳定性。此外，固体电解质的小粒径增强了固体电解质与电极之间的接触，降低了界面接触电阻。因此，TiS ₂ / Na ₁₀ SnSb ₂ S ₁₂ / Na全固态钠电池显示出优异的循环稳定性，并在100 mA g ^-1下循环100次后显示119.6 mAh g ^-1的容量。