Na based all-solid-state batteries are a promising technology for large-scale energy storage applications owing to good safety properties and low cost. High performance solid electrolyte materials with high room temperature ionic conductivity, good electrochemical stability and facile synthesis are highly desired for the commercialization of this technology. In this work, we report the synthesis and characterization of a novel fast Na-ion conductor, cubic Na3SbSe4, with an excellent ionic conductivity of 0.85 mS cm–1 at room temperature, and a group of S doped variants. Na3SbSe4 exhibits good compatibility with metallic Na and good stability in a wide voltage range. The application of this compound as solid electrolyte is demonstrated in all-solid-state Na-ion cells cycled at room temperature.
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机译：基于钠的全固态电池由于其良好的安全性能和低成本而成为用于大规模能量存储应用的有前途的技术。具有高室温离子电导率，良好的电化学稳定性和易于合成的高性能固体电解质材料对于该技术的商业化是非常需要的。在这项工作中，我们报告了一种新颖的快速Na离子导体立方Na3SbSe4的合成和表征，该导体在室温下具有0.85 mS cm -1 的优异离子电导率，并且掺杂了一组S变体。 Na3SbSe4与金属Na的相容性好，在宽电压范围内也具有良好的稳定性。在室温下循环的全固态Na离子电池中证明了该化合物作为固体电解质的应用。
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