Sodium-Deficient NPSC (Na2.9PS3.9Cl0.1) Powder as Solid-State Electrolyte for Sodium-Ion Battery, 5-10 g/bottle, CSIBSSESDNPSC

Sodium-Deficient NPSC (Na2.9PS3.9Cl0.1) is an advanced sulfide-based solid electrolyte powder engineered specifically for all-solid-state sodium-ion batteries (ASSSIBs). By intentionally introducing sodium vacancies into the argyrodite lattice framework, this material significantly enhances local sodium-ion diffusion kinetics and lowers migration energy barriers, achieving superior room-temperature ionic conductivity compared to stoichiometric analogs.

The key features and electrochemical behavior of Na2.9PS3.9Cl0.1 are: (1) Enhanced Ionic Conductivity: The introduction of controlled Na+ vacancies disrupts local electrostatic bottlenecks, facilitating rapid percolation pathways for sodium ions and delivering high room-temperature conductivity (~ 10^{-3} S cm^{-1} range). (2) Structural Framework: Adopts a disordered argyrodite crystal structure where framework flexibility and halide substitution (Cl-) stabilize the high-conductivity cubic phase. (3) Chemo-Mechanical Adaptability: Like other sulfide electrolytes, Na2.9PS3.9Cl0.1 exhibits favorable mechanical softness, allowing for cold-sintering and intimate interfacial contact with active electrodes under moderate stack pressure. (4) Vulnerability: Highly reactive toward ambient moisture; exposure to air triggers rapid hydrolysis, releasing toxic hydrogen sulfide (H2S) gas and destroying the conductive pathways.

Notes: Please try to store the Na2.9PS3.9Cl0.1 powders in glovebox due to its moisture sensitivity. 

References: 

1. Y. Wang, et al. Low-Cost Raw Materials Synthesized Na2.9375PS3.9375Cl0.0625 Solid Electrolyte, Energy Technology, 2020, 8, 2000606
2. C. Fu, et al. LaCl3-based sodium halide solid electrolytes with high ionic conductivity for all-solid-state batteries, Nature Communications, 2024, 15, 4315