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- W2766692937 abstract "We demonstrate a novel crosslinked disulfide system as a cathode material for Li-S cells that is designed with the two criteria of having only a single point of S−S scission and maximizing the ratio of S−S to the electrochemically inactive framework. The material therefore maximizes theoretical capacity while inhibiting the formation of polysulfide intermediates that lead to parasitic shuttle. The material we report contains a 1:1 ratio of S:C with a theoretical capacity of 609 mAh g−1. The cell gains capacity through 100 cycles and has 98 % capacity retention thereafter through 200 cycles, demonstrating stable, long-term cycling. Raman spectroscopy confirms the proposed mechanism of disulfide bonds breaking to form a S−Li thiolate species upon discharge and reforming upon charge. Coulombic efficiencies near 100 % for every cycle, suggesting the suppression of polysulfide shuttle through the molecular design." @default.
- W2766692937 created "2017-11-10" @default.
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- W2766692937 date "2017-10-19" @default.
- W2766692937 modified "2023-10-06" @default.
- W2766692937 title "High Sulfur Content Material with Stable Cycling in Lithium‐Sulfur Batteries" @default.
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- W2766692937 doi "https://doi.org/10.1002/anie.201708746" @default.
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