An electrochemically stable homogeneous glassy electrolyte formed at room temperature for all-solid-state sodium batteries

Xiaowei Chi, Ye Zhang, Fang Hao, Steven Kmiec, Hui Dong, Rong Xu, Kejie Zhao, Qing Ai, Tanguy Terlier, Liang Wang, Lihong Zhao, Liqun Guo, Jun Lou, Huolin L. Xin, Steve W. Martin*, Yan Yao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

104 Citations (Scopus)

Abstract

All-solid-state sodium batteries (ASSSBs) are promising candidates for grid-scale energy storage. However, there are no commercialized ASSSBs yet, in part due to the lack of a low-cost, simple-to-fabricate solid electrolyte (SE) with electrochemical stability towards Na metal. In this work, we report a family of oxysulfide glass SEs (Na3PS4−xOx, where 0 < x ≤ 0.60) that not only exhibit the highest critical current density among all Na-ion conducting sulfide-based SEs, but also enable high-performance ambient-temperature sodium-sulfur batteries. By forming bridging oxygen units, the Na3PS4−xOx SEs undergo pressure-induced sintering at room temperature, resulting in a fully homogeneous glass structure with robust mechanical properties. Furthermore, the self-passivating solid electrolyte interphase at the Na|SE interface is critical for interface stabilization and reversible Na plating and stripping. The new structural and compositional design strategies presented here provide a new paradigm in the development of safe, low-cost, energy-dense, and long-lifetime ASSSBs.

Original languageEnglish
Article number2854
JournalNature Communications
Volume13
Issue number1
DOIs
Publication statusPublished - Dec 2022

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Chi, X., Zhang, Y., Hao, F., Kmiec, S., Dong, H., Xu, R., Zhao, K., Ai, Q., Terlier, T., Wang, L., Zhao, L., Guo, L., Lou, J., Xin, H. L., Martin, S. W., & Yao, Y. (2022). An electrochemically stable homogeneous glassy electrolyte formed at room temperature for all-solid-state sodium batteries. Nature Communications, 13(1), Article 2854. https://doi.org/10.1038/s41467-022-30517-y