1. Highly conductive VC embedded in carbon matrix as effective trapper and catalyst for Li-S batteries
- Author
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Xin Wang, Benben Wei, Chaoqun Shang, and Guofu Zhou
- Subjects
Vanadium carbide ,Materials science ,Kinetics ,Metals and Alloys ,chemistry.chemical_element ,General Chemistry ,Sulfur ,Redox ,Catalysis ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Chemisorption ,Electrical resistivity and conductivity ,Materials Chemistry ,Ceramics and Composites ,Electrical conductor - Abstract
Vanadium carbide embedded in a nitrogen-doped carbon matrix (VC@NCM) is synthesized as a 3D freestanding sulfur host. Owing to the high electrical conductivity (1.6 × 104 S cm-1) of VC and strong chemisorption and catalytic effect on sulfur species, Li-S batteries with VC@NCM deliver enhanced redox kinetics with ultralow capacity decay of 0.01% per cycle after 1000 cycles at 1C. This work identifies the effect of strong chemisorption and high electrical conductivity on high S utilization and cycle stability in Li-S batteries.
- Published
- 2020