Journal
JOURNAL OF POWER SOURCES
Volume 261, Issue -, Pages 264-270Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.03.088
Keywords
Lithium-sulfur battery; Current collector; Electron pathway; Carbon nanotube
Funding
- China Postdoctoral Science Foundation [2012M520293, 2013T60125]
- National Natural Science Foundation of China [21306103]
- Research Fund for the Doctoral Program of Higher Education of China [20120002120047]
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Conductive carbon scaffolds are efficient and effective to build advanced carbon/sulfur composite cathodes for lithium sulfur (Li-S) batteries. However, the areal sulfur loading is commonly less than 4.0 mg cm(-2), which limits the energy density and practical application of Li-S cells. In this contribution, three-dimensional (3D) aluminum foam/carbon nanotube (CNT) scaffolds were applied as the current collectors to build long- and short-range electron pathways and provided enough space for high sulfur loading. The sulfur loading amount on the 3D current collectors ranged from 7.0 to 12.5 mg cm(-2). A high initial discharge capacity of 6.02 mAh cm(-2) (860 mAh g(-1)) was achieved on an electrode with an improved sulfur loading of 7.0 mg cm-2. Therefore, the combination of 3D long-range current collectors and short-range CNT conductive scaffold provides an efficient and effective route to make full use of sulfur with a very high sulfur loading amount in a Li-S cell. (c) 2014 Elsevier B.V. All rights reserved.
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