Hollow-in-hollow carbon spheres with hollow foam-like cores for lithium–sulfur batteries

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• 作者：Jun Zang ; Taihua An ; Yajie Dong ; Xiaoliang Fang ; Mingsen Zheng…
• 关键词：hollow spheres ; porous carbon ; sulfur/carbon cathode ; lithium–sulfur batteries
• 刊名：Nano Research
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：8
• 期：8
• 页码：2663-2675
• 全文大小：2,736 KB
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• 作者单位：Jun Zang (1) (2)
  Taihua An (2)
  Yajie Dong (1)
  Xiaoliang Fang (1)
  Mingsen Zheng (2)
  Quanfeng Dong (2)
  Nanfeng Zheng (2)
  
  1. Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, 361005, China
  2. State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chinese Library of Science
  Chemistry
  Nanotechnology
  
• 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
• ISSN：1998-0000

文摘

Lithium-sulfur batteries have attracted increasing attention because of their high theoretical capacity. Using sulfur/carbon composites as the cathode materials has been demonstrated as an effective strategy to optimize sulfur utilization and enhance cycle stability as well. In this work, hollow-in-hollow carbon spheres with hollow foam-like cores (HCSF@C) are prepared to improve both capability and cycling stability of lithium–sulfur batteries. With high surface area and large pore volumes, the loading of sulfur in HCSF@C reaches up to 70 wt.%. In the resulting S/HCSF@C composites, the outer carbon shell serves as an effective protection layer to trap the soluble polysulfide intermediates derived from the inner component. Consequently, the S/HCSF@C cathode retains a high capacity of 780 mAh/g after 300 cycles at a high charge/discharge rate of 1 A/g.