Three-dimensional porous carbon composites containing high sulfur nanoparticle content for high-performance lithium–sulfur batteries

Guoxing Li, Jinhua Sun, Wenpeng Hou, Shidong Jiang, Yong Huang and Jianxin Geng ()
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Guoxing Li: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
Jinhua Sun: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
Wenpeng Hou: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
Shidong Jiang: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
Yong Huang: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
Jianxin Geng: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract Sulfur is a promising cathode material for lithium–sulfur batteries because of its high theoretical capacity (1,675 mA h g−1); however, its low electrical conductivity and the instability of sulfur-based electrodes limit its practical application. Here we report a facile in situ method for preparing three-dimensional porous graphitic carbon composites containing sulfur nanoparticles (3D S@PGC). With this strategy, the sulfur content of the composites can be tuned to a high level (up to 90 wt%). Because of the high sulfur content, the nanoscale distribution of the sulfur particles, and the covalent bonding between the sulfur and the PGC, the developed 3D S@PGC cathodes exhibit excellent performance, with a high sulfur utilization, high specific capacity (1,382, 1,242 and 1,115 mA h g−1 at 0.5, 1 and 2 C, respectively), long cycling life (small capacity decay of 0.039% per cycle over 1,000 cycles at 2 C) and excellent rate capability at a high charge/discharge current.

Date: 2016
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DOI: 10.1038/ncomms10601

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