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

Zhang, Juan; Yang, Chun-Peng; Yin, Ya-Xia; Wan, Li-Jun; Guo, Yu-Guo · Adv Mater · 2016

basic_science · Level V

Where this comes from

Abstract

Hybrid sp<sup>2</sup> 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<sup>-1</sup> at 5 C) and long-cycle life over 1000 cycles.