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Title: Multifunctional separator with porous carbon/Multi-walled carbon nanotube coating for advanced lithium-sulfur batteries
Authors: Tan, L
Li, XH
Wang, Z
Guo, HJ
Wang, J
An, L 
Issue Date: 2-Jan-2018
Source: ChemElectroChem, 2 Jan. 2018, v. 5, no. 1, p. 71-77
Abstract: An issue associated with lithium-sulfur (Li-S) batteries is polysulfide dissolution, leading to the serious crossover of polysulfide to the Li anode. To address this issue, we report on a multifunctional separator prepared by introducing a porous carbon/multi-walled carbon nanotube (PC/MWCNT) composite into a commercial separator. It shows that the PC/MWCNT composite is able to enhance the interfacial interaction between the coating and the polysulfide and provides a large surface area for absorbing the polysulfide, thus improving the electrical conductivity. It has been demonstrated that the Li-S cell constructed with the PC/MWCNT composite separator results in a reversible capacity as high as 659 mAhg(-1) after 200 cycles at 0.5 C, and the average capacity fading rate of the cell is about 0.138% per cycle. The performance improvement is attributed to a reduction in the crossover rate of polysulfide through the composite separator as a result of the polysulfide absorption by PC/MWCNT layer.
Keywords: Lithium-sulfur batteries
Polysulfides
Porous carbon
Multifunctional separators
Publisher: Wiley-VCH
Journal: ChemElectroChem 
ISSN: 2196-0216
DOI: 10.1002/celc.201700986
Rights: © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
This is the peer reviewed version of the following article: Tan, L., Li, X., Wang, Z., Guo, H., Wang, J., & An, L. (2018). Multifunctional Separator with Porous Carbon/Multi‐Walled Carbon Nanotube Coating for Advanced Lithium− Sulfur Batteries. ChemElectroChem, 5(1), 71-77, which has been published in final form at https://doi.org/10.1002/celc.201700986. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
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