Year-end Sale % OFF 
Abstract
Li/S batteries suffer from major problems including low active material utilization, poor cycling performance and low Coulombic efficiency due to high solubility of intermediate polysulfides and low conductivity of sulfur. Here, wereport modified carbon nanotubes (MCNT)-S comprising the key features of elemental sulfur (S8) and sulfurized carbon (SC) when used as cathode materials. The use of a mixed solvent of MCNT in hydrogen peroxide and sulfur in carbon disulfide followed by 300°C heat treatment in vacuum oven leads to extremely uniform and dense sulfur layers on CNT surfaces via physical and chemical deposition, and enables the fabrication of remarkably improved Li/S cathodes with a reversible capacity of 1180 mAhg-1 without obvious capacity decay over 300 cycles at 0.25 C, and 67.5% of capacity retention from 1182 to 799 mAhg-1 over 600 cycles at 0.75 C with an average Coulombic efficiency of 95.5%. The results provide important progress towards the understanding of the role of MCNT on the realization of high efficiency and long cycle performances for Li/S batteries.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
