2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 10: Battery, Recycling, Environmental, Mining
| Editors: | Kongoli F, Kumar V, Aifantis K, Pagnanelli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 220 pages |
| ISBN: | 978-1-987820-54-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Encapsulate sulfur in multilateral graphene nanosheets for high-areal-capacity lithium sulfur batteries
Yusheng Ye1; Ji Qian1; Renjie Chen1; Feng Wu1;1BEIJING INSTITUTE OF TECHNOLOGY, Beijing, China;
Type of Paper: Regular
Id Paper: 431
Topic: 14
Abstract:
To progress commercial application in a mobile device and energy storage, batteries with higher energy storage density than existing lithium-ion batteries need to be developed. Lithium sulfur battery thus would be an optimal choice, because it can deliver high energy density (2600 Wh/kg) and offer low-cost and environment-friendly characteristics. However, the sulfur cathode suffers from long-chain lithium polysulfides dissolution, volume variation and poor conductivity issues, leading to low active material use and low coulombic efficiency during charge/discharge cycles. Although advanced research has helped understand important relations between confinement and performance, effective and economical strategies to improve sulfur cathode cycling remain elusive. Here, we show that encapsulate sulfur in graphene nanosheets helps isolate sulfur from the electrolyte and facilitates electrons conductivity. The unique graphene nanosheets with multilateral structure show high specific surface (638.308 m2/g) and interconnected pores, which can effectively prevent the dissolution of polysulfides and accommodate the volume change between S and Li2S. High capacity and excellent cycle performance show the as-prepared sulfur/ multilateral graphene nanosheets nanocomposite can be a promising cathode for lithium-sulfur batteries.