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- W4385476985 abstract "Defective two-dimensional transition metal dichalcogenides can be effective electrocatalysts for Li–S batteries, but the relationship between defect types and battery performance is unclear. In this work, we designed S vacancy-type SV-VS2 and V self-intercalated-type VI-VS2 and measured their catalytic activities in Li–S batteries. Compared with self-intercalating V atoms, S vacancies accelerated Li+ diffusion and SV-VS2 as a Li+ “reservoir” promoted the sulfur conversion kinetics significantly. In addition, the presence of sulfur vacancies promoted the lithiation behavior of SV-VS2 during discharge, leading to an enhancement of the catalytic ability of SV-VS2. However, this lithiation phenomenon weakened the catalytic activity of VI-VS2. Overall, SV-VS2 had better adsorption and catalytic activity. Li–S batteries with SV-VS2-coated separators delivered high rate performance and excellent cycling stability, with a capacity decay rate of 0.043% over 880 cycles at 1.0 C. This work provides an effective strategy for designing efficient Li–S battery electrocatalysts using defect engineering." @default.
- W4385476985 created "2023-08-03" @default.
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- W4385476985 date "2023-08-02" @default.
- W4385476985 modified "2023-10-16" @default.
- W4385476985 title "Defect-Engineered VS<sub>2</sub> Electrocatalysts for Lithium–Sulfur Batteries" @default.
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- W4385476985 doi "https://doi.org/10.1021/acs.nanolett.3c01838" @default.
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