Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 4, Pages 1392-1395Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta05938g
Keywords
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Funding
- Strategic Priority Research Program of the CAS [XDA09010600]
- Natural Science Foundation of China [21273273, 21103222]
- Sci. & Tech. Project of Suzhou [ZXJ2012045]
- Natural Science Foundation of Jiangsu Province [BK20130006]
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Sulfurized carbon is a promising candidate for cathode materials in practical lithium-sulfur batteries due to its high and stable capacity retention, extremely low self-discharge, and excellent safety. The main disadvantage is the relatively low sulfur content in sulfurized carbon materials. Borrowing the idea from rubber crosslinking chemistry, here we report the use of a vulcanization accelerator in carbon sulfurization. Vulcanization accelerators significantly improve sulfur content by similar to 8 wt%, which results in a remarkable increase in the discharge capacity of corresponding Li-S batteries by similar to 120 mA h g(-1) while maintaining the outstanding cycling stability and low self-discharge. The effectiveness of this approach and the wide variety of vulcanization accelerator chemistry will pave the way for sulfurized carbon materials towards practical applications in Li-S batteries.
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