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Influence of synthesis parameters on crystallization behavior and ionic conductivity of the Li4PS4I solid electrolyte.

ABSTRACT: Superionic solid electrolytes are key to the development of advanced solid-state Li batteries. In recent years, various materials have been discovered, with ionic conductivities approaching or even exceeding those of carbonate-based liquid electrolytes used in high-performance Li-ion batteries. Among the different classes of inorganic solid electrolytes under study, lithium thiophosphates are one of the most promising due to their high Li-ion conductivity at room temperature and mechanical softness. Here, we report about the effect of synthesis parameters on the crystallization behavior and charge-transport properties of Li4PS4I. We show that thermally induced crystallization of Li4PS4I (P4/nmm), starting from the glassy phase 1.5Li2S-0.5P2S5-LiI, adversely affects the material's conductivity. However, both conductivity and crystallization temperature can be significantly increased by applying pressure during the preparation.

SUBMITTER: Strauss F 

PROVIDER: S-EPMC8263741 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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Influence of synthesis parameters on crystallization behavior and ionic conductivity of the Li<sub>4</sub>PS<sub>4</sub>I solid electrolyte.

Strauss Florian F   Lin Jing J   Janek Jürgen J   Brezesinski Torsten T  

Scientific reports 20210707 1

Superionic solid electrolytes are key to the development of advanced solid-state Li batteries. In recent years, various materials have been discovered, with ionic conductivities approaching or even exceeding those of carbonate-based liquid electrolytes used in high-performance Li-ion batteries. Among the different classes of inorganic solid electrolytes under study, lithium thiophosphates are one of the most promising due to their high Li-ion conductivity at room temperature and mechanical softn  ...[more]

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