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- W2776006483 abstract "Abstract Potassium ion batteries are potential energy storage devices owing to their low cost and good K+ diffusion kinetics due to the small Stoke's radius. Here, we report a layered TiS2 cathode material, demonstrating outstanding potassium storage cycling and rate performances in ether-based electrolyte, with a capacity of 80 mAh g−1 at 20 C and 63 mAh g−1 after 600 cycles (1.5–3.0 V, corresponding to 4.8 A g−1). The phase transitions during K ion intercalation at the atomic level are explored via High Resolution Transmission Electron Microscopy (HRTEM) and ex-situ X-ray diffraction (XRD) combined with Rietveld refinements. It undergoes a second-stage structure to be K0.11TiS2 and then first-stage K0.56TiS2. The K cations intercalate into trigonal prismatic sites with a sliding of Ti-S plane by 120 degree-rotation, rendering a 3 × 3 commensurate superstructure along the [001] zone. The K stage intercalation is in favor of a Daumas-Herold model rather than Rudorff model. This study demonstrates that the layer structure materials are promising candidates for high performances K-ion batteries and highlights the importance of improving electrochemical performances with electrolyte modification." @default.
- W2776006483 created "2018-01-05" @default.
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- W2776006483 date "2018-05-01" @default.
- W2776006483 modified "2023-10-16" @default.
- W2776006483 title "TiS2 as a high performance potassium ion battery cathode in ether-based electrolyte" @default.
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- W2776006483 doi "https://doi.org/10.1016/j.ensm.2017.12.018" @default.
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