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- W4281790655 abstract "Abstract Lithium‐sulfur (Li–S) batteries are promising as next‐generation energy storage systems. Adsorbents for sulfide species are favorably applied to the cathode, but this substrate often results in a surface‐passivating lithium sulfide(Li 2 S) film with a strong adsorption of Li 2 S. Here, an amorphous titanium suboxide (a‐TiOx) is presented that strongly adsorbs lithium polysulfides (Li 2 S x , x < 6) but relatively weakly adsorbs to Li 2 S. With these characteristics, the a‐TiO x achieves high conversion of Li 2 S x and high sulfur utilization accompanying the growth of particulate Li 2 S. The DFT calculations present a mechanism for particulate growth driven by the promoted diffusion and favorable clustering of Li 2 S. The a‐TiO x ‐coated carbon nanotube‐assembled film (CNTF) cathode substrate cell achieves a high discharge capacity equivalent to 90% sulfur utilization at 0.2 C. The cell also delivers a high capacity of 850 mAh g –1 even at the ultra‐high‐speed of 10 C and also exhibits high stability of capacity loss of 0.0226% per cycle up to 500 cycles. The a‐TiO x /CNTF is stacked to achieve a high loading of 7.5 mg S cm –2 , achieving a practical areal capacity of 10.1 mAh cm –2 ." @default.
- W4281790655 created "2022-06-13" @default.
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- W4281790655 date "2022-06-05" @default.
- W4281790655 modified "2023-10-13" @default.
- W4281790655 title "Discovery of Dual‐Functional Amorphous Titanium Suboxide to Promote Polysulfide Adsorption and Regulate Sulfide Growth in Li–S Batteries" @default.
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- W4281790655 doi "https://doi.org/10.1002/advs.202200958" @default.
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