Ultrastable lithium–sulfur batteries with outstanding rate capability boosted by NiAs-type vanadium sulfides
| العنوان: | Ultrastable lithium–sulfur batteries with outstanding rate capability boosted by NiAs-type vanadium sulfides |
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| المؤلفون: | Yunfei Bai, Xiao Bo Pan, Geng Zhi Sun, Xiao Jun Pan, Xiu Ping Gao, Jinyuan Zhou, Guo Wen Sun, Chao Yue Zhang, Zhe Dai, Yi Rong Zhao |
| المصدر: | Journal of Materials Chemistry A. 8:18358-18366 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Materials science, Renewable Energy, Sustainability and the Environment, Carbon nanofiber, chemistry.chemical_element, Vanadium, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Sulfur, Cathode, 0104 chemical sciences, Catalysis, law.invention, chemistry, Nanocrystal, Chemical engineering, law, Electrode, General Materials Science, 0210 nano-technology |
| الوصف: | Vanadium sulfides, such as VS2, have been often used as sulfur host materials for lithium–sulfur batteries (LSBs), however, their high-symmetry and layered crystalline structure often lead to a poor rate-capability and a limited cycling stability of the resultant LSBs. Thus, in this work, a type of distorted NiAs-type structured V2S3 phase was designed and attempted to use it as a sulfur host for LSBs. The results showed that the prepared V2S3-nanocrystal decorated carbon nanofiber (CNF@V2S3) electrode films are freestanding, highly conductive and flexible. And the resultant CNF@V2S3/S cathodes show a high specific capacity (1169 mA h g−1 at 0.1C), an excellent rate capability (retain 78.9% at 2.0C), an ultra-low delay rate per cycle of 0.0071%, and a low self-discharge rate of 3.65% per month. A series of analyses indicate that these high electrochemical performances are mainly due to the high polarity, high conductivity and high catalytic activity of V2S3 nanocrystals, as well as the improved diffusivities of Li ions. This research could provide some new insight into the design of sulfur host materials for high-performance LSBs. |
| تدمد: | 2050-7496 2050-7488 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::9916ed16c946d2d1addca2df853a0637 https://doi.org/10.1039/d0ta06330d |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........9916ed16c946d2d1addca2df853a0637 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20507496 20507488 |
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