期刊
NATURE COMMUNICATIONS
卷 13, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-022-30517-y
关键词
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资金
- United States Department of Energy's Advanced Research Projects Agency-Energy (ARPA-E) [DE-AR0000654]
- National Natural Science Foundation of China [51901240]
- Research Corporation of Science Advancement [27110]
- DOE Office of Science [DE-AC02-06CH11357]
- U.S. Department of Energy Office of Science [DE-SC0012704]
- National Science Foundation [CBET-1626418]
This study reports a new type of solid electrolyte material for the fabrication of all-solid-state sodium batteries. The electrolyte material exhibits excellent electrochemical stability and mechanical properties, enabling high-performance sodium-sulfur batteries. This research provides new design strategies for the development of safe, low-cost, energy-dense, and long-lifetime all-solid-state sodium batteries.
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. Single sodium-ion solid electrolyte that meets the requirements of practical applications is difficult to design. Here, the authors show how kinetic stability via the creation of a self-passivating solid electrolyte interphase allows a homogenous glass solid electrolyte to exhibit remarkable electrochemical stability with sodium metal.
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