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- W3197158416 abstract "Sulfide glasses, with high room-temperature Li-ion conductivities, are a promising class of solid-state electrolytes for all-solid-state batteries. Yet, when in contact with Li metal, our current understanding of important interfacial phenomena such as electrolyte reduction and Li-ion transport is still quite limited, especially at the atomic scale. Here, using first-principles molecular dynamics simulations, we tackle these open questions head-on and examine key interfacial properties of Li-argyrodite Li6PS5Cl electrolyte at bare and coated Li-metal anodes. Specifically, we investigate the role of the interfacial composition and morphology in a number of Li-metal surfaces, including surfaces coated with thin films of Li2Sn5, MoS2, LiF, and Li3P. Our materials models are designed to gain insights into the early stages of interface formation and structural evolution. In addition, by employing a novel topological analysis of procrystal electron density distribution as applied to interfacial solid-state ionics, we thoroughly assess Li-ion conductivity through the investigated interfaces. Our results provide evidence of progressive breaking of P–S bonds in PS43– groups and eventual P–P recombination of intermediate species as the main reaction mechanisms of Li6PS5Cl reduction by Li metal. We also predict Li2Sn5 as the most suitable coating to partially prevent the electrolyte degradation while keeping a relatively low interfacial resistance. These findings shed light on the interface chemistry of sulfide-based electrolytes in contact with Li metal and pave the way for rationalizing further computational and experimental studies in the field." @default.
- W3197158416 created "2021-09-13" @default.
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- W3197158416 date "2021-09-01" @default.
- W3197158416 modified "2023-10-03" @default.
- W3197158416 title "Molecular-Level Insight into the Interfacial Reactivity and Ionic Conductivity of a Li-Argyrodite Li<sub>6</sub>PS<sub>5</sub>Cl Solid Electrolyte at Bare and Coated Li-Metal Anodes" @default.
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- W3197158416 doi "https://doi.org/10.1021/acsami.1c12753" @default.
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