Unstacked double-layer templated graphene for high-rate lithium–sulphur batteries

Meng-Qiang Zhao, Qiang Zhang (), Jia-Qi Huang, Gui-Li Tian, Jing-Qi Nie, Hong-Jie Peng and Fei Wei ()
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Meng-Qiang Zhao: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Qiang Zhang: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Jia-Qi Huang: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Gui-Li Tian: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Jing-Qi Nie: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Hong-Jie Peng: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Fei Wei: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: Abstract Preventing the stacking of graphene is essential to exploiting its full potential in energy-storage applications. The introduction of spacers into graphene layers always results in a change in the intrinsic properties of graphene and/or induces complexity at the interfaces. Here we show the synthesis of an intrinsically unstacked double-layer templated graphene via template-directed chemical vapour deposition. The as-obtained graphene is composed of two unstacked graphene layers separated by a large amount of mesosized protuberances and can be used for high-power lithium–sulphur batteries with excellent high-rate performance. Even after 1,000 cycles, high reversible capacities of ca. 530 mA h g−1 and 380 mA h g−1 are retained at 5 C and 10 C, respectively. This type of double-layer graphene is expected to be an important platform that will enable the investigation of stabilized three-dimensional topological porous systems and demonstrate the potential of unstacked graphene materials for advanced energy storage, environmental protection, nanocomposite and healthcare applications.

Date: 2014
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DOI: 10.1038/ncomms4410

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