首页|Enhancement of lithium argyrodite interface stability through MoO2 substitution and its application in lithium solid state batteries
Enhancement of lithium argyrodite interface stability through MoO2 substitution and its application in lithium solid state batteries
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NSTL
Elsevier
? 2022 Elsevier B.V.A recently developed sulfide solid electrolyte in lithium solid-state batteries has a low critical current density, which can cause battery failure. Therefore, the metal oxide substitution in the Li-argyrodite structure was considered as a strategy to enhance the interface stability. In this work, the interface stability of the Li-argyrodites was improved using metal and oxygen substitution in the P- and S-sites of the Li6PS5Cl structure; furthermore, their structural and electrochemical performances were evaluated. For this study, the MoO2 substituted argyrodite (0 ≤ x ≤ 0.2) was synthesized using a high-energy ball-milling process. Structural analysis revealed that impurity phases occurred when x was over 0.05; this indicated the solubility limit of the metal oxide substitution. The ionic conductivity analysis demonstrated that Li6PS5Cl-MoO2-0.05 electrolyte maintained an ionic conductivity of 4.16 mS cm?1. Additionally, the Li6PS5Cl-MoO2-0.05 composition exhibited a higher critical current density (0.55 mA cm?2) than that of Li6PS5Cl (0.20 mA cm?2). It should be further noted that the electrochemical performances were examined against lithium as a reference.
NSTL
Elsevier
