Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7729923 | Journal of Power Sources | 2016 | 9 Pages |
Abstract
Pyrolyzed porous spherical composites of polyacrylonitrile-Ketjenblack carbon and sulfur (pPAN-KB/S) with a high sulfur content (ca. 72%) and enhanced conductivity and porosity (pore volume: 1.42Â cm3/g; BET surface area: 727Â m2/g) were prepared by an aerosol-assisted process and applied as cathode for lithium-sulfur batteries. Electrochemical tests showed that the pPAN-KB/S composite exhibited a high capacity of 866Â mAh/g (based on sulfur) after 100 cycles at 0.5C (1CÂ =Â 1.68 A/g) and a good rate performance at high current density (431Â mAh/g at 5C). In addition, a pPAN-KB/S composite electrode with high sulfur loading (ca. 4.4Â mg-S/cm2) exhibited impressive electrochemical performance with a reversible capacity of 513Â mAh/g and 576Â mAh/cm3 (based on sulfur) and a coulombic efficiency >99% after 100 cycles at 0.5C.
Related Topics
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Authors
Hiesang Sohn, Mikhail L. Gordin, Michael Regula, Dong Hyeon Kim, Yoon Seok Jung, Jiangxuan Song, Donghai Wang,