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Graphene Sandwiched by Sulfur-Confined Mesoporous Carbon Nanosheets: A Kinetically Stable Cathode for Li–S Batteries
- Xin, Sen, You, Ya, Li, Hui-Qin, Zhou, Weidong, Li, Yutao, Xue, Leigang, Cong, Huai-Ping
- ACS Applied Materials & Interfaces 2016 v.8 no.49 pp. 33704-33711
- automobiles, batteries, cathodes, electrochemistry, electrons, energy, graphene, ions, nanosheets, porous media, sulfur
- The practical use of lithium–sulfur batteries for the next-generation energy storage, especially the automobiles, was hindered by low electronic conductivity of sulfur and the resulting poor rate capabilities. Here, we report a sulfur–carbon composite by confining S into a graphene sandwiched in mesoporous carbon nanosheets with a two-dimensional ultrathin morphology, suitable mesopore size and large pore volume, and excellent electronic conductivity. Serving as cathode material for a Li–S battery, the elaborately designed S/C composite leads to “kinetically stable” transmissions of Li ions and electrons, triggering a stable electrochemistry and a record-breaking rate performance. In this way, the S/C composite has been proved a promising cathode material for high-rate Li–S batteries targeted at automobile storage.