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Materials 2017, 10(4), 376; doi:10.3390/ma10040376

Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur Batteries

Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
State Key Laboratory of Power System, Tsinghua University, Beijing 100084, China
Department of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China
Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Author to whom correspondence should be addressed.
Received: 26 January 2017 / Revised: 20 March 2017 / Accepted: 21 March 2017 / Published: 31 March 2017
(This article belongs to the Special Issue Materials for Electrochemical Capacitors and Batteries)
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Two different interlayers were introduced in lithium–sulfur batteries to improve the cycling stability with sulfur loading as high as 80% of total mass of cathode. Melamine was recommended as a nitrogen-rich (N-rich) amine component to synthesize a modified polyacrylic acid (MPAA). The electrospun MPAA was carbonized into N-rich carbon nanofibers, which were used as cathode interlayers, while carbon nanofibers from PAA without melamine was used as an anode interlayer. At the rate of 0.1 C, the initial discharge capacity with two interlayers was 983 mAh g−1, and faded down to 651 mAh g−1 after 100 cycles with the coulombic efficiency of 95.4%. At the rate of 1 C, the discharge capacity was kept to 380 mAh g−1 after 600 cycles with a coulombic efficiency of 98.8%. It apparently demonstrated that the cathode interlayer is extremely effective at shutting down the migration of polysulfide ions. The anode interlayer induced the lithium ions to form uniform lithium metal deposits confined on the fiber surface and in the bulk to strengthen the cycling stability of the lithium metal anode. View Full-Text
Keywords: lithium–sulfur battery; carbon nanofibers interlayer; suppress lithium dendrite; high sulfur loading lithium–sulfur battery; carbon nanofibers interlayer; suppress lithium dendrite; high sulfur loading

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Gao, T.; Le, T.; Yang, Y.; Yu, Z.; Huang, Z.; Kang, F. Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur Batteries. Materials 2017, 10, 376.

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