Sulfur Encapsulated in Graphitic Carbon Nanocages for High-Rate and Long-Cycle Lithium-Sulfur Batteries

Juan Zhang; Chun-Peng Yang; Ya-Xia Yin; Li-Jun Wan; Yu-Guo Guo

doi:10.1002/adma.201602913

Sulfur Encapsulated in Graphitic Carbon Nanocages for High-Rate and Long-Cycle Lithium-Sulfur Batteries

Adv Mater. 2016 Nov;28(43):9539-9544. doi: 10.1002/adma.201602913. Epub 2016 Sep 13.

Authors

Juan Zhang^{1

2}, Chun-Peng Yang^{1

2}, Ya-Xia Yin^{1

2}, Li-Jun Wan¹, Yu-Guo Guo^{1

2}

Affiliations

¹ CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.
² School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.

PMID: 27620697
DOI: 10.1002/adma.201602913

Abstract

Hybrid sp² carbon with a graphene backbone and graphitic carbon nanocages (G-GCNs) is demonstrated as an ideal host for sulfur in Li-S batteries, because it serves as highly efficient electrochemical nanoreactors as well as polysulfides reservoirs. The as-obtained S/(G-GCNs) with high S content exhibits superior high-rate capability (765 mA h g^-1 at 5 C) and long-cycle life over 1000 cycles.

Keywords: Li-S batteries; carbon nanostructures; graphene; nanocages; sulfur cathodes.