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• W4285025381 abstract "Hollow carbon spheres or core–sheath porous carbon spheres have been widely used in the S cathode of lithium–sulfur batteries. However, the sphere shells or the pore walls may block the free transport of active species to a certain extent and may have a negative influence on the effective accommodation of elemental sulfur. Herein, solid but porous carbon spheres (PNCS) with large porosity and high specific surface area are developed, which enable high sulfur loading and ample cathode/electrolyte contact area, and the interconnected open pore channels significantly shorten the ion/electron transport pathways. Together with high-conducting nitrogen-doped graphene (NG), facilitated polysulfide conversion kinetics is realized in the as-assembled Li–S batteries, which deliver a high initial discharge capacity of 1445 mAh g–1 at 0.2 C, excellent rate capability of 872 mAh g–1 at 4 C, and low capacity decay of 0.047% per cycle for 500 cycles at 1 C. Even under high sulfur loading of 5.5 mg cm–2 and low electrolyte/sulfur (E/S) ratio of 5 μL mg–1, the Li–S batteries still display high specific capacities of 896 mAh g–1 and 4.96 mAh cm–2. The real application of PNCS/NG is also demonstrated by the corresponding Li–S pouch cells showing high discharging capacity and stable open circuit voltage. This work exhibits the promising application of the solid carbon spheres as the S host for effectively addressing the polysulfide shuttle and propelling the development of high-performance Li–S batteries." @default.
• W4285025381 created "2022-07-12" @default.
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• W4285025381 date "2022-07-12" @default.
• W4285025381 modified "2023-10-14" @default.
• W4285025381 title "Solid Carbon Spheres with Interconnected Open Pore Channels Enabling High-Efficient Polysulfide Conversion for High-Rate Lithium–Sulfur Batteries" @default.
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• W4285025381 doi "https://doi.org/10.1021/acsami.2c09331" @default.
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