An argyrodite sulfide-based superionic conductor synthesized by a liquid-phase technique with tetrahydrofuran and ethanol

Abstract

An argyrodite Li6PS5Br electrolyte is synthesized using tetrahydrofuran and ethanol solvents and shows the highest conductivity of 3.1 mS cm−1.

Boosting Solid‐State Diffusivity and Conductivity in Lithium Superionic Argyrodites by Halide Substitution

“…Total ionic conductivities are heavily influenced by the synthesis method, grain boundary contributions, and methods used for conductivity measurements, including sintering cold‐pressed pellets . Solution‐based Li 6 PS 5 X synthesis routes typically give lower ion conductivities (10 −5 –10 −4 mS cm −1 ) owing to phase impurities although recent studies using this method report high values for Li 6 PS 5 Cl and mixed anion Li 6 PS 5 (Cl,Br) argyrodites of 2.4 and 3.9 mS cm −1 , respectively; and 3.1 mS cm −1 for Li 6 PS 5 Br . A conductivity of 3.15 mS cm −1 for Li 6 PS 5 Cl was reported prepared by a rapid solid‐state route and a value of 5 mS cm −1 was recently achieved upon long‐term annealing, albeit using pellets pressed at eight tons .…”

Quantitative analysis of crystallinity in an argyrodite sulfide-based solid electrolyte synthesized via solution processing

“…A liquid-phase process for preparing the sulde-based solid electrolytes is a necessary technique to replace conventional solid-phase and vapor-phase methods. Based on the initial report on b-Li 3 PS 4 synthesized using tetrahydrofuran (THF), 11 there have been several investigations of the liquid-phase syntheses of various solid electrolytes such as b-Li 3 PS 4 , [12][13][14] Li 7 P 3 S 11 , [15][16][17][18] Li 7 P 2 S 8 I, 19,20 Li 6 PS 5 X (X ¼ Cl, Br, I, BH 4 ), [21][22][23][24][25][26] and Na 3 MS 4 (M ¼ P, Sb). [27][28][29][30][31][32][33] In particular, we have focused on the liquid-phase synthesis of argyrodite electrolytes via solutions because of their high applicability.…”

Boosting Solid‐State Diffusivity and Conductivity in Lithium Superionic Argyrodites by Halide Substitution

“…[10] Solution-based Li 6 PS 5 Xs ynthesis routes typically give lower ion conductivities (10 À5 -10 À4 mS cm À1 ) [11][12][13] owing to phase impurities although recent studies using this method report high values for Li 6 PS 5 Cl and mixed anion Li 6 PS 5 (Cl,Br) argyrodites of 2.4 and 3.9 mS cm À1 ,r espectively; [14] and 3.1 mS cm À1 for Li 6 PS 5 Br. [15] Ac onductivity of 3.15 mS cm À1 for Li 6 PS 5 Cl was reported prepared by ar apid solid-state route [16] and av alue of 5mScm À1 was recently achieved upon long-term annealing,a lbeit using pellets pressed at eight tons. [17] Li 6 PS 5 Cl is consequently ap romising candidate for all-solidstate Li-ion batteries.…”