All-solid-state cells with Li4Ti5O12/carbon nanotube composite electrodes prepared by infiltration with argyrodite sulfide-based solid electrolytes via liquid-phase processing

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

“…The electrolyte showed a high lithium-ion conductivity of 3.1 mS cm À1 at 25 C. 23 In addition, coating the electrode active material particles with electrolytes and inltrating the electrolytes into the porous electrode sheets using the precursor solutions were useful for obtaining dense composite electrodes with wide electrode-electrolyte contact areas, achieving high-performing all-solid-state cells. [21][22][23][24]34,35 These results are sufficient for demonstrating the advantages of the liquid-phase techniques for all-solid-state cells. To obtain a deeper understanding of liquid-phase synthesis, the reaction mechanisms in the solution and the structural changes aer removing the solvents must be claried.…”

“…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.…”

Impact of Solvent Treatment of the Superionic Argyrodite Li6PS5Cl on Solid‐State Battery Performance

“…[ 47 ] Unlike Li 3 PS 4 , [ 10,51 ] argyrodites can be dissolved in alcohols for infiltration processes by using ethanol or mixtures of ethanol with ethyl acetate, ethyl propionate, THF, or ACN. [ 16,18–22,51–58 ] As a result of infiltration processing (in alcohols), higher capacities, [ 20,50 ] high reversible capacities, [ 19,22 ] and an improvement in cycling stability and rate capability [ 22 ] were achieved, even though ethanol exposure seems to reduce the conductivity of the argyrodite, with recovery of full conductivity not occurring until heat treatment to high temperatures at which other composite components may not be stable. [ 19,54,56,57 ] For argyrodites treated in ethanol, the grain boundary resistance was reported to increase due to surface residues originating from the solvent.…”

Characterization of quasi-solid electrolytes based on Li₃PS₄ glass with organic carbonate additives

“…Journal of the Ceramic Society of Japan 128[9] 653-655 2020 DOI http://doi.org/10.2109/jcersj2.20114 JCS -Japan ©2020 The Ceramic Society of Japan…”