Na₃PS₄-Sodium-Ion Solid-State Electrolyte

Name: Na₃PS₄ Sodium-Ion Sulfide Solid-State Electrolyte

Material Form: Powder

Product Code: XN-NPS

Description:

Na₃PS₄ is a foundational sodium-ion sulfide solid-state electrolyte and the parent compound from which many advanced doped variants (Cl-doped NPSCl, W-doped W-NPS) are derived. As one of the most extensively studied sodium superionic conductors, Na₃PS₄ delivers reproducible 0.19 mS/cm room-temperature ionic conductivity in a well-characterized cubic framework. As a result, this material is widely used as a benchmark electrolyte for sodium-ion all-solid-state battery (Na-ASSB) research and as a starting point for doping studies aimed at higher-conductivity sodium electrolytes.

Application:

This material serves as a sodium-ion conducting solid electrolyte for all-solid-state sodium-ion batteries (Na-ASSBs), Na-S battery research, low-cost grid storage prototypes, and academic studies of fast Na⁺ ion transport in sulfide systems. Furthermore, it is an ideal starting material for synthesizing aliovalent-doped sodium electrolytes such as Cl-doped (NPSCl) and W-doped (W-NPS) compositions.

Specifications:

Values measured by Xnergy. Typical values for reference; not guaranteed unless otherwise specified.

XRD Phase Analysis:

XRD pattern of Na₃PS₄ powder confirming the cubic crystal structure characteristic of sodium superionic conductors.

Characteristics:

Foundational sodium superionic conductor

Na₃PS₄ is one of the most extensively studied sodium-ion sulfide solid electrolytes in academic literature. Therefore, it provides a well-characterized benchmark with rich published data for comparison and reproducibility studies.

Sub-micron particle size for composite cathode mixing

Average particle size of ~700 nm provides a high surface area for intimate cathode interface contact in composite electrode formulations. As a result, customers achieve lower interfacial resistance and improved active material utilization.

Cubic crystal framework

X-ray diffraction confirms the target cubic Na₃PS₄ phase, free of significant secondary phases. Consequently, the material delivers reproducible electrochemical performance and predictable behavior in cell architectures.

Ideal precursor for advanced doping studies

Pure Na₃PS₄ is the standard starting material for aliovalent doping research. Moreover, customers can use this material to produce custom-doped sodium electrolytes (e.g., halogen, W, Si, Sn doping) for specific performance optimization.

Low-cost sodium chemistry

Sodium-based electrolytes leverage abundant raw materials (Na vs Li). Therefore, Na₃PS₄ is well-suited for cost-sensitive, large-scale stationary storage applications where Li-ion economics are unfavorable.

Packaging & Storage:

The material ships vacuum-sealed under inert atmosphere in moisture-barrier aluminum-laminated bags. Therefore, customers should store sealed in an Ar or N₂ glovebox, protected from moisture. Because Na₃PS₄ is moisture-sensitive — sulfide electrolytes hydrolyze on contact with water to release H₂S — handle exclusively in a controlled dry environment with dew point < –40 °C. Reseal promptly after opening.

Safety:

For research and industrial use only. Hydrolysis of sulfide electrolytes releases hydrogen sulfide (H₂S), a toxic gas. Handle exclusively in a glovebox or well-ventilated dry environment. Wear full PPE (chemical-resistant gloves, lab coat, safety goggles, respirator if outside glovebox). Refer to SDS for complete safety information.

Note: Values listed above are typical and for reference only. Performance may vary depending on cell architecture, cathode selection, and test protocol. For higher-conductivity doped variants, see our W-Doped NPS (Na₃.₁P₀.₉W₀.₁S₄) at 4.1 mS/cm and NPSCl (Na₂.₉PS₃.₉Cl₀.₁). For oxide sodium electrolytes, see MgO-Doped β″-Al₂O₃ and NASICON NZSPO.