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One-Step Synthesis of Carbon Nanosheets Decorated Carbon Nanofiber as a 3D Interconnected Porous Carbon Scaffold for Lithium-Sulfur Battery

Abstract

Among the emerging energy storage methods, lithium-sulfur battery (LIS) has drawn plenty of attentions due to its high theoretical energy density, economical cost and environmental benignity. Nevertheless, the insulating nature of sulfur and notorious polysulfides shuttling result in a low sulfur utilization and short cycling life. In the recent years, various carbon structures have been reported as effective sulfur hosts to tolerate volume expansion, prevent polysulfide dissolution and enhance electrical conductivity. It is hard for carbon materials, however, to satisfy all these aspects with a simple structural design. Thus, developing hierarchical carbon structures that serve as a multi-functional host is necessary for high-performance LIS. Herein, we reported a facile method to prepare three-dimensional carbon nanofiber (3DCNF) through hydrothermal reaction. With the structural advantages, the 3DCNF and sulfur composite delivered a capacity as high as 1266, 977 mAh/g at 0.1 and 0.5 C, respectively. After 500 cycles at 0.5 C, it still retains a capacity of 607 mAh/g (0.07% capacity fading per cycle), exhibiting excellent cycling capability.

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Publication details

The article was received on 08 Aug 2017, accepted on 09 Oct 2017 and first published on 10 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA06998G
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    One-Step Synthesis of Carbon Nanosheets Decorated Carbon Nanofiber as a 3D Interconnected Porous Carbon Scaffold for Lithium-Sulfur Battery

    S. Feng, J. Song, S. Fu, C. Zhu, Q. Shi, M. Song, D. Du and Y. Lin, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA06998G

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