Journal
JOURNAL OF POWER SOURCES
Volume 327, Issue -, Pages 474-480Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.07.088
Keywords
Lithium sulfide; 3D graphene foam; Free-standing; Flexible; Lithium-sulfur batteries
Funding
- National Natural Science Foundation of China [51372033, 51202022, 21403031, 61378028]
- Fundamental Research Funds for the Central Universities [ZYGX2013Z001, ZYGX2014J088, ZYGX2015Z003]
- National High Technology Research and Development Program of China [2015AA034202]
- 111 Project [B13042]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120185120011]
- Sichuan Youth Science and Technology Innovation Research Team Funding [2011JTD0006]
- Science AMP
- Technology Support Funds of Sichuan Province [2016GZ0151]
- Sino-German Cooperation PPP Program of China [201400260068]
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Three-dimensional Li2S/graphene hierarchical architecture (3DLG) is synthesized with a facile infiltration method. Highly-crystalline Li2S nanoparticles are deposited homogenously into three-dimensional graphene foam (3DGF) network grown by chemical vapor deposition (CVD), resulting in 3DLG with high surface area, porosity, flexibility and conductivity. The 3DLG is employed as flexible, free-standing and binder-free cathode without metallic current collectors or conducting additives. Due to the unique structure, the 3DLG exhibits a high discharge capacity of 894.7 mAh g(-1) at 0.1 degrees C, a high capacity retention of 87.7% after 300 cycles at 0.2 degrees C, and the high-rate capacity up to 4 degrees C reaches 598.6 mAh g(-1). The cyclic performance is record-breaking compared to the previous reports on free-standing graphene-Li2S cathodes. Flexible lithium-sulfur batteries based on the high-capacity 3DLG cathode have promising application potentials in flexible electronics, electrical vehicles, etc. (C) 2016 Elsevier B.V. All rights reserved.
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