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Facile Synthesis of Hierarchical Sulfur Composites for Lithium–Sulfur Batteries
Author(s) -
Cho ChuanSheng,
Shih HsuanJu,
Li ChiaChen
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201900399
Subject(s) - sulfur , materials science , composite material , slurry , composite number , nanocomposite , electrode , electrochemistry , cathode , dispersion (optics) , conductivity , chemical engineering , chemistry , metallurgy , physics , optics , engineering
A facile approach for the synthesis of core–shell composites composed of a commercial sulfur core and a carbon nanopowder shell with different morphologies and sizes is proposed. When these composites are used to prepare a cathode for lithium−sulfur batteries, their fabricated electrode slurries show better dispersion homogeneity than that prepared through the conventional method of simply mixing sulfur and carbon nanopowders. Hence, the resulting cathodes fabricated by using these composites show superior electronic and ionic conductivity compared to that produced through the conventional method. Electrochemical assessment demonstrates that lithium−sulfur batteries fabricated by using the composites show reduced self‐discharge and improved capacity and maintained 100 % of the columbic efficiency. However, these improvements cannot be achieved if the sulfur crystal of the composite is considerably large, as this negatively affects the dispersion of the electrode constituents.