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- W4378192772 abstract "High-performance, practical all-solid-state batteries (ASSBs) require solid-state electrolytes (SSEs) with fast Li-ion conduction, wide electrochemical stability window, low cost, and low mass density. Recent density functional theory (DFT) simulations have suggested that lithium thioborates are a particularly promising class of materials for high-performance SSEs in Li batteries, but these materials have not been studied extensively experimentally due to synthesis difficulty. Particularly, their electrochemical properties remain largely underexplored, limiting their further development and application as SSEs. In this work, we report the successful synthesis and a comprehensive electrochemical performance study of single-phase, crystalline Li6+2x[B10S18]Sx (x ≈ 1). We find cold-pressed samples of Li6+2x[B10S18]Sx (x ≈ 1) to exhibit a high ionic conductivity of 1.3 × 10–4 S cm–1 at room temperature. Furthermore, Li6+2x[B10S18]Sx (x ≈ 1) shows an electrochemical stability window of 1.3–2.5 V, much wider than most sulfide SSEs. Symmetrical Li–Li cells fabricated with a Li6+2x[B10S18]Sx (x ≈ 1) pellet were cycled up to a current density of 1 mA cm–2 and exhibited good long-term cycling stability for more than 140 h at 0.3 mA cm–2. These results suggest Li6+2x[B10S18]Sx (x ≈ 1) as a promising choice of SSE for high-performance ASSBs for energy storage." @default.
- W4378192772 created "2023-05-26" @default.
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- W4378192772 date "2023-05-25" @default.
- W4378192772 modified "2023-10-17" @default.
- W4378192772 title "Experimental Discovery of a Fast and Stable Lithium Thioborate Solid Electrolyte, Li<sub>6+2<i>x</i></sub>[B<sub>10</sub>S<sub>18</sub>]S<sub><i>x</i></sub> (<i>x</i> ≈ 1)" @default.
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- W4378192772 doi "https://doi.org/10.1021/acsenergylett.3c00560" @default.
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