Conductive resilient graphene aerogel via magnesiothermic reduction of graphene oxide assemblies

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• 作者：Huang Tang ; Peibo Gao ; Zhihao Bao ; Bin Zhou ; Jun Shen ; Yongfeng Mei…
• 关键词：graphene aerogel ; magnesiothermic reduction ; conductivity ; mechanical properties
• 刊名：Nano Research
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：8
• 期：5
• 页码：1710-1717
• 全文大小：1,692 KB
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• 作者单位：Huang Tang (1)
  Peibo Gao (1)
  Zhihao Bao (1)
  Bin Zhou (1)
  Jun Shen (1)
  Yongfeng Mei (2)
  Guangming Wu (1)
  
  1. Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China
  2. Department of Materials Science and Engineering, Fudan University, 220 Handan Road, Shanghai, 200433, 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

Graphene aerogels are desirable for energy storage and conversion, as catalysis supports, and as adsorbents for environmental remediation. To produce graphene aerogels with low density, while maintaining high electrical conductivity and strong mechanic performance, we synthesized graphene aerogels by the magnesiothermic reduction of a freeze-dried graphene oxide (GO) self-assembly and subsequent etching of the formed MgO in acid solution. The reduced graphene oxide (rGO) aerogel samples exhibited densities as low as 1.1 mg·cm?. The rGO aerogel was very resilient, exhibiting full recoveryeven after being compressed by strains of up to 80%; its elastic modulus (E) scaled with density (ρ) as E～?sup>2. The rGO aerogels also exhibited high conductivities (e.g., 27.7 S·m? at 3.6 mg·cm?) and outperformed many rGO aerogels fabricated by other reduction processes. Such outstanding properties were ascribed to the microstructures inherited from the freeze-dried GO self-assembly and the magnesiothermic reduction process.