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Conductivity and structural properties of fast Ag-ion-conducting GaGeSbS–AgI glassy electrolytes

Abstract : The use of ion-conducting chalcogenide glass, a promising solid electrolyte, is encouraged at higher conductivity for all-solid-state rechargeable battery. Herein, a new quaternary glass of GaGeSbS–AgI system was successfully prepared, and its structural and electrochemical properties were investigated by XRD, Raman, and AC impendence measurement. The relatively high conductivity of 2.955 × 10−3 S/cm and low activation energy of 0.07 eV were obtained after optimized structure regulation. The short-range schematic of the glass structure was explored to determine the fast-migrating mechanism involved in conducting Ag+ ions. By controlling the proper ratio of Ga(Ge) and Sb cations, the loose and porous layer structure of [SbSxI3-x] linking by the [Ga(Ge)S4] tetrahedron was formed, resulting in the rapid transport of Ag+ ions with a reduced migration energy barrier. The current work is the first time that a sulfide solid electrolyte in quaternary glass system with desirable electrochemical characteristics was used to address energy and safety issues. © 2020
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Submitted on : Thursday, October 8, 2020 - 3:30:54 PM
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Bitner M.A., Qing Jiao, Y. Zhang, C H. Lin, Xianghua Zhang, et al.. Conductivity and structural properties of fast Ag-ion-conducting GaGeSbS–AgI glassy electrolytes. Ceramics International, Elsevier, 2020, 46 (16 Part A), pp.24882-24886. ⟨10.1016/j.ceramint.2020.06.272⟩. ⟨hal-02932326⟩

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