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

Abstract

Composite quasi-solid electrolytes comprising Li 3 PS 4 (LPS) glass and various organic carbonates were prepared, and the effects of these carbonates on the glass were investigated. Compared to LPS glass, the conductivity decreased for composites with highly dielectric cyclic carbonates and increased slightly for composites with a poorly dielectric linear carbonate. Scanning electron microscopy observations indicated that the addition of a poorly dielectric linear carbonate slightly improved the formability of LPS glass.

Quasi-Solid Electrolytes Comprising Sulfide Electrolyte and Carboxylate Esters: Investigation of the Influence of the Carboxylate Ester Structure

“…The formability and ionic conductivity of the LPS glass electrolyte were improved upon the addition of small quantities of the carboxylic acid ester, regardless of the difference in their molecular structures. The results 38 reported previously and the present results suggest that the addition of small amounts of compounds with a polar carbonyl group and low dielectric constant improves the properties of the sulfide solid electrolytes. Figure 6 shows the conductivities of the (100−x) LPS•xPA and (100−y)LPS•yMTMA composites at room temperature with different ratios of the components.…”

“…In contrast, the formability and conductivity of the LPS glass increased slightly upon the addition of a linear carbonate with a low dielectric constant. 38 In this study, we focused on the use of carboxylic acid esters with different molecular structures, which are often used as electrode slurry solvents or solvents in liquid-phase syntheses, for the synthesis of the sulfide solid electrolytes. These organic compounds used as solvents are expected to be relatively more stable than the organic carbonate used in the synthesis of sulfide solid electrolytes.…”

Solvent Key Parameters for the Wet Chemical Synthesis of the Li3PS4 Solid Electrolyte

“…This mixture can be explained by a degradation of the solvato-complex by the solvent during the 72 h of reaction. Indeed, Shimamoto et al 38 indicate that β Li 3 PS 4 and alkyl carbonates tend to react together to form Li 2 S, a reaction that is accompanied by solvent decomposition (CO 2 formation). Production of CO 2 probably occurred under our reaction conditions, as evidenced by the ejection of a cap due to pressure buildup after around 4 h of stirring.…”