Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/127346
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Type: Journal article
Title: A quinonoid-imine-enriched nanostructured polymer mediator for lithium-sulfur batteries
Author: Chen, C.-Y.
Peng, H.-J.
Hou, T.-Z.
Zhai, P.-Y.
Li, B.-Q.
Tang, C.
Zhu, W.
Huang, J.-Q.
Zhang, Q.
Citation: Advanced Materials, 2017; 29(23):1606802-1-1606802-7
Publisher: Wiley
Issue Date: 2017
ISSN: 0935-9648
1521-4095
Statement of
Responsibility: 
Chen‐Yu Chen, Hong‐Jie Peng, Ting‐Zheng Hou, Pei‐Yan Zhai, Bo‐Quan Li, Cheng Tang ... et al.
Abstract: The reversible formation of chemical bonds has potential for tuning multi‐electron redox reactions in emerging energy‐storage applications, such as lithium−sulfur batteries. The dissolution of polysulfide intermediates, however, results in severe shuttle effect and sluggish electrochemical kinetics. In this study, quinonoid imine is proposed to anchor polysulfides and to facilitate the formation of Li2S2/Li2S through the reversible chemical transition between protonated state (-NH+ =) and deprotonated state (-N=). When serving as the sulfur host, the quinonoid imine‐doped graphene affords a very tiny shuttle current of 2.60 × 10−4 mA cm−2, a rapid redox reaction of polysulfide, and therefore improved sulfur utilization and enhanced rate performance. A high areal specific capacity of 3.72 mAh cm−2 is achieved at 5.50 mA cm−2 on the quinonoid imine‐doped graphene based electrode with a high sulfur loading of 3.3 mg cm−2. This strategy sheds a new light on the organic redox mediators for reversible modulation of electrochemical reactions.
Keywords: Graphene; lithium–sulfur batteries; nanostructure; polysulfides; quinonoid imine
Rights: © 2017 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.
DOI: 10.1002/adma.201606802
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Chemistry and Physics publications

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