A graphene foam electrode with high sulfur loading for flexible and high energy Li-S batteries

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	A graphene foam electrode with high sulfur loading for flexible and high energy Li-S batteries
	G. M.; Li Zhou, L.; Ma, C. Q.; Wang, S. G.; Shi, Y.; Koratkar, N.; Ren, W. C.; Li, F.; Cheng, H. M.
	2015
发表期刊	Nano Energy
ISSN	2211-2855
卷号	11 页码:356-365
摘要	Lithium-sulfur (Li-S) batteries have attracted great attention as next-generation high specific energy density storage devices. However, the low sulfur loading in the cathode for Li-S battery greatly offsets its advantage in high energy density and limits the practical applications of such battery concepts. Flexible energy storage devices are also becoming increasingly important for future applications but are limited by the lack of suitable lightweight electrode materials with robust electrochemical performance under cyclic mechanical strain. Here, we proposed an effective strategy to obtain flexible Li-S battery electrodes with high energy density, high power density, and long cyclic life by adopting graphene foam-based electrodes. Graphene foam can provide a highly electrically conductive network, robust mechanical support and sufficient space for a high sulfur loading. The sulfur loading in graphene foam-based electrodes can be tuned from 3.3 to 10.1 mg cm(-2). The electrode with 10.1 mg cm(-2) sulfur loading could deliver an extremely high areal capacity of 13.4 mAh cm(-2), much higher than the commonly reported Li-S electrodes and commercially used lithium cobalt oxide cathode with a value of similar to 3-4 mAh cm(-2). Meanwhile, the high sulfur-loaded electrodes retain a high rate performance with reversible capacities higher than 450 mAh g(-1) under a large current density of 6 A g(-1) and preserve stable cycling performance with similar to 0.07% capacity decay per cycle over 1000 cycles. These impressive results indicate that such electrodes could enable high performance, fast-charging, and flexible Li-S batteries that show stable performance over extended charge/ discharge cycling. (C) 2014 Elsevier Ltd. All rights reserved.
部门归属	[zhou, guangmin ; li, lu ; ma, chaoqun ; wang, shaogang ; shi, ying ; ren, wencai ; li, feng ; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [li, lu ; koratkar, nikhil] rensselaer polytech inst, dept mech aerosp & nucl engn, troy, ny 12180 usa. ; cheng, hm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; fli@imr.ac.cn ; cheng@imr.ac.cn
关键词	Graphene Foam Sulfur Flexible Devices High Areal Capacity Lithium-sulfur Batteries Lithium-ion Batteries Composite Cathodes High-capacity Carbon Performance Density Storage Nanocrystals Lightweight Conversion
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74040
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. M.,Li Zhou, L.,Ma, C. Q.,et al. A graphene foam electrode with high sulfur loading for flexible and high energy Li-S batteries[J]. Nano Energy,2015,11:356-365.
APA	G. M..,Li Zhou, L..,Ma, C. Q..,Wang, S. G..,Shi, Y..,...&Cheng, H. M..(2015).A graphene foam electrode with high sulfur loading for flexible and high energy Li-S batteries.Nano Energy,11,356-365.
MLA	G. M.,et al."A graphene foam electrode with high sulfur loading for flexible and high energy Li-S batteries".Nano Energy 11(2015):356-365.