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- W4328138134 abstract "Developing efficient sulfur cathodes toward low conductivity of S8 and severe polysulfide shuttling is of great significance for lithium-sulfur batteries. Herein, a highly aligned and low tortuosity nanoarray engineering composed of N-doped carbon nanotube arrays uniformly coated with a thin layer of TiO2 (noted as aligned TiO2@[email protected]) was facilely synthesized. As revealed by density functional theory calculations and COMSOL simulations, the vertically aligned CNTs provide fast electronic transport paths and the TiO2 layer catalyzes fast redox reaction kinetics of polysulfides. As further confirmed by electrochemical tests, the low tortuosity TiO2@[email protected] shows better performance than both bare [email protected] and disordered TiO2@[email protected] electrodes. Typically, a specific energy density of 1298 mAh g−1 at 0.1C is obtained, which retains 715 mAh g−1 at a high rate of 3C. Remarkably, the aligned TiO2@[email protected] cathode shows a high specific discharge capacity of 779 mAh g−1 with sulfur loading of 3 mg cm−2 after 100 cycles at a E/S ratio of 10 μL mg−1. Our approach would provide a promising route for the facile structural & surface engineering of ordered array electrodes with high electrochemical performance." @default.
- W4328138134 created "2023-03-22" @default.
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- W4328138134 date "2023-05-01" @default.
- W4328138134 modified "2023-10-07" @default.
- W4328138134 title "Highly aligned and low tortuosity nanoarray engineering for fast Li-S batteries" @default.
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- W4328138134 doi "https://doi.org/10.1016/j.electacta.2023.142268" @default.
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