Reed straw derived active carbon/graphene hybrids as sustainable high-performance electrodes for advanced supercapacitors

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• 作者：Qinxing Xie ; Anran Zheng ; Sibo Zhai ; Shihua Wu…
• 关键词：Supercapacitor ; Graphene ; Active carbon ; Reed straw ; Composite
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：20
• 期：2
• 页码：449-457
• 全文大小：1,725 KB
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• 作者单位：Qinxing Xie (1)
  Anran Zheng (1)
  Sibo Zhai (1)
  Shihua Wu (3)
  Chao Xie (2)
  Yufeng Zhang (1)
  Yunfei Guan (3)
  
  1. Tianjin Key Laboratory of Fiber Modification and Functional Fibers, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
  3. Department of Chemistry, Nankai University, Tianjin, 300017, China
  2. School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255049, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Analytical Chemistry
  Industrial Chemistry and Chemical Engineering
  Characterization and Evaluation Materials
  Condensed Matter
  Electronic and Computer Engineering
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1433-0768

文摘

Reed straw-derived active carbon@graphene (AC@GR) hybrids were prepared by one-step carbonization/activation process using a mixture of reed straw and graphene oxide (GO) as raw materials and ZnCl₂ as activation agent. The as-prepared hybrids exhibit high specific surface area in a range of 1971–2497 m2 g−1, abundant porosity, as well as excellent energy storage capability. The symmetric C//C supercapacitor using the hybrid obtained at 700 °C as electrodes demonstrates superior cycling durability, ca. 90 % retention after 6000 cycles at 2 A g−1, and a high energy density of 6.12 Wh kg−1 at a power density of up to 4660 W kg−1 in 6 M KOH aqueous electrolyte. The excellent capacitive performance is attributed to the synergistic effect of AC and GR. Keywords Supercapacitor Graphene Active carbon Reed straw Composite