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- W2894862902 abstract "Abstract The lithium-sulfur (Li–S) battery is a promising alternative to overcome capacity and specific energy limitations of common lithium-ion batteries. Highly porous, nitrogen-doped carbons as conductive host structures for sulfur/lithium sulfide deposition are shown herein to play a critical role in reversible cycling at low electrolyte/sulfur ratio. The pore geometry is precisely controlled by an efficient, scalable ZnO hard templating process. By using an electrolyte volume as low as 4 µL mg-1S, the beneficial nitrogen functionality leads to a twofold increased cell lifetime turning our findings highly favorable for real applications. Stable cycling of up to 156 cycles (59 cycles with undoped carbon) with high sulfur loadings of 3 mg cm-2 is achieved. Operando X-ray diffraction measurements during cycling show the transformation pathway of the sulfur – polysulfide – Li2S species. The observed intermediates critically depend on the nitrogen doping in the cathode carbon matrix. Nitrogen-doped carbons facilitate polysulfide adsorption promoting the nucleation of crystalline Li2S. These results provide new insights into the significant role of heteroatom doping for carbons in Li-S batteries with high specific energy." @default.
- W2894862902 created "2018-10-12" @default.
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- W2894862902 date "2018-12-01" @default.
- W2894862902 modified "2023-09-27" @default.
- W2894862902 title "On the mechanistic role of nitrogen-doped carbon cathodes in lithium-sulfur batteries with low electrolyte weight portion" @default.
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- W2894862902 doi "https://doi.org/10.1016/j.nanoen.2018.09.065" @default.
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