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New Na-Ion Solid Electrolytes Na4- xSn1- xSbxS4 (0.02 ≤ x ≤ 0.33) for All-Solid-State Na-Ion Batteries
- New Na-Ion Solid Electrolytes Na4- xSn1- xSbxS4 (0.02 ≤ x ≤ 0.33) for All-Solid-State Na-Ion Batteries
- Heo, Jong Wook; Banerjee, Abhik; Park, Kern Ho; Jung, Yoon Seok; Hong, Seung Tae
- DGIST Authors
- Hong, Seung Tae
- Issue Date
- Advanced Energy Materials
- Article Type
- Article in Press
- Antimony compounds; Chemical stability; Crystal structure; Electric batteries; Electrolytes; Ionic conduction in solids; Ionic conductivity; Ions; Sodium compounds; Solid state devices; Sulfur compounds; Tin compounds; Titanium compounds; Air stability; All-solid state; Energy storage applications; High capacity; Na-ion batteries; Solid state batteries; Structural class; Sulfides; Solid electrolytes
- Sulfide Na-ion solid electrolytes (SEs) are key to enable room-temperature operable all-solid-state Na-ion batteries that are attractive for large-scale energy storage applications. To date, few sulfide Na-ion SEs have been developed and most of the SEs developed contain P and suffer from poor chemical stability. Herein, discovery of a new structural class of tetragonal Na4- xSn1- xSbxS4 (0.02 ≤ x ≤ 0.33) with space group I41/acd is described. The evolution of a new phase, distinctly different from Na4SnS4 or Na3SbS4, allows fast ionic conduction in 3D pathways (0.2-0.5 mS cm-1 at 30 °C). Moreover, their excellent air stability and reversible dissolution in water and precipitation are highlighted. Specifically, TiS2/Na-Sn all-solid-state Na-ion batteries using Na3.75Sn0.75Sb0.25S4 demonstrates high capacity (201 mA h (g of TiS2)-1) with excellent reversibility. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
- Wiley-VCH Verlag
- Related Researcher
Hong, Seung Tae
Discovery Lab(Batteries & Materials Discovery Laboratory)
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- Energy Science and EngineeringDiscovery Lab(Batteries & Materials Discovery Laboratory)1. Journal Articles
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