期刊
CHEMICAL ENGINEERING JOURNAL
卷 395, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.124978
关键词
Room temperature Na-S batteries; Effective catalysis; Reaction kinetics; Freestanding cathode
资金
- National Natural Science Foundation of China [21773188]
- Program for Innovation Team Building at Institutions of Higher Education in Chongqing [XDJK2019AA002]
- Postgraduate tutor team building project [XYDS201911]
Room-temperature sodium-sulfur (RT Na-S) batteries have aroused extensive interest from researchers owing to the high theoretical volumetric energy density, nontoxicity and low-cost. However, poor conductivity of sulfur and high solubility of polysulfides in electrolyte are two major challenges for the practical application of the RT Na-S batteries. Herein, we report a three dimensional self-supported structure with Vanadium carbide (VC) nanoparticles embedded in carbon nanofibers for RT Na-S batteries. Finally, the VC-CNFs@S electrode displays a reversible capacity of 379 mAh g(-1) after 2000 cycles at 0.5C with a high capacity retention of 96.2%. Such outstanding electrochemical property is ascribed to the confining - trapping - catalyzing effect of VC-CNFs structure.
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